/usr/bin/java -Xmx16000000000 -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 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-06 00:16:14,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-06 00:16:14,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-06 00:16:14,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-06 00:16:14,557 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 [2021-06-06 00:16:14,591 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-06 00:16:14,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-06 00:16:14,592 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-06 00:16:14,592 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-06 00:16:14,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-06 00:16:14,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-06 00:16:14,595 INFO L138 SettingsManager]: * Use SBE=true [2021-06-06 00:16:14,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-06 00:16:14,595 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-06 00:16:14,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-06 00:16:14,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-06 00:16:14,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-06 00:16:14,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-06 00:16:14,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-06 00:16:14,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-06 00:16:14,597 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-06 00:16:14,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-06 00:16:14,597 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-06 00:16:14,597 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-06 00:16:14,597 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-06 00:16:14,597 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-06 00:16:14,598 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-06 00:16:14,598 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-06 00:16:14,598 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:16:14,598 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-06 00:16:14,598 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-06 00:16:14,598 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-06 00:16:14,598 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-06 00:16:14,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-06 00:16:14,599 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-06 00:16:14,599 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-06 00:16:14,599 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-06 00:16:14,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-06 00:16:14,952 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-06 00:16:14,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-06 00:16:14,956 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-06 00:16:14,957 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-06 00:16:14,958 INFO L432 ainManager$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 [2021-06-06 00:16:14,958 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl' [2021-06-06 00:16:14,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-06 00:16:15,000 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-06 00:16:15,001 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-06 00:16:15,002 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-06 00:16:15,002 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-06 00:16:15,014 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 06.06 12:16:14" (1/1) ... [2021-06-06 00:16:15,021 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 06.06 12:16:14" (1/1) ... [2021-06-06 00:16:15,028 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-06 00:16:15,029 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-06 00:16:15,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-06 00:16:15,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-06 00:16:15,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:16:14" (1/1) ... [2021-06-06 00:16:15,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:16:14" (1/1) ... [2021-06-06 00:16:15,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:16:14" (1/1) ... [2021-06-06 00:16:15,038 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:16:14" (1/1) ... [2021-06-06 00:16:15,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:16:14" (1/1) ... [2021-06-06 00:16:15,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:16:14" (1/1) ... [2021-06-06 00:16:15,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:16:14" (1/1) ... [2021-06-06 00:16:15,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-06 00:16:15,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-06 00:16:15,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-06 00:16:15,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-06 00:16:15,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:16:14" (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 [2021-06-06 00:16:15,117 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-06 00:16:15,118 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-06 00:16:15,118 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-06 00:16:15,118 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-06 00:16:15,118 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-06 00:16:15,118 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-06 00:16:15,119 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-06 00:16:15,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-06 00:16:15,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-06 00:16:15,119 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-06 00:16:15,119 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-06 00:16:15,119 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-06 00:16:15,120 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-06 00:16:15,331 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-06 00:16:15,331 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-06 00:16:15,334 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:16:15 BoogieIcfgContainer [2021-06-06 00:16:15,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-06 00:16:15,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-06 00:16:15,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-06 00:16:15,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-06 00:16:15,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:16:14" (1/2) ... [2021-06-06 00:16:15,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e839321 and model type multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.06 12:16:15, skipping insertion in model container [2021-06-06 00:16:15,354 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:16:15" (2/2) ... [2021-06-06 00:16:15,355 INFO L111 eAbstractionObserver]: Analyzing ICFG multiply-verify.wvr.bpl [2021-06-06 00:16:15,359 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-06 00:16:15,359 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-06 00:16:15,359 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-06 00:16:15,360 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-06 00:16:15,423 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-06 00:16:15,452 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-06 00:16:15,467 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-06 00:16:15,468 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-06 00:16:15,468 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-06 00:16:15,468 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-06 00:16:15,468 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-06 00:16:15,468 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-06 00:16:15,468 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-06 00:16:15,468 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-06 00:16:15,477 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 90 flow [2021-06-06 00:16:15,523 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) [2021-06-06 00:16:15,526 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) [2021-06-06 00:16:15,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:16:15,538 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:15,538 INFO L554 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] [2021-06-06 00:16:15,539 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:15,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:15,543 INFO L82 PathProgramCache]: Analyzing trace with hash -894934944, now seen corresponding path program 1 times [2021-06-06 00:16:15,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:15,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524326621] [2021-06-06 00:16:15,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:15,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:15,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524326621] [2021-06-06 00:16:15,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524326621] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:16:15,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:16:15,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-06 00:16:15,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793022562] [2021-06-06 00:16:15,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:16:15,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:15,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:16:15,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:16:15,939 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) [2021-06-06 00:16:16,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:16,078 INFO L93 Difference]: Finished difference Result 349 states and 846 transitions. [2021-06-06 00:16:16,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:16:16,080 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 [2021-06-06 00:16:16,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:16,098 INFO L225 Difference]: With dead ends: 349 [2021-06-06 00:16:16,099 INFO L226 Difference]: Without dead ends: 311 [2021-06-06 00:16:16,100 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 117.4ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:16,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-06 00:16:16,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 293. [2021-06-06 00:16:16,165 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) [2021-06-06 00:16:16,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 725 transitions. [2021-06-06 00:16:16,168 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 725 transitions. Word has length 22 [2021-06-06 00:16:16,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:16,168 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 725 transitions. [2021-06-06 00:16:16,169 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) [2021-06-06 00:16:16,169 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 725 transitions. [2021-06-06 00:16:16,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:16:16,175 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:16,175 INFO L554 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] [2021-06-06 00:16:16,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-06 00:16:16,176 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:16,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:16,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1198566966, now seen corresponding path program 2 times [2021-06-06 00:16:16,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:16,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846459647] [2021-06-06 00:16:16,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:16,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:16,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:16,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846459647] [2021-06-06 00:16:16,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846459647] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:16:16,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:16:16,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-06 00:16:16,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972328518] [2021-06-06 00:16:16,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:16:16,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:16,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:16:16,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:16:16,296 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) [2021-06-06 00:16:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:16,367 INFO L93 Difference]: Finished difference Result 333 states and 800 transitions. [2021-06-06 00:16:16,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:16:16,367 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 [2021-06-06 00:16:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:16,369 INFO L225 Difference]: With dead ends: 333 [2021-06-06 00:16:16,370 INFO L226 Difference]: Without dead ends: 296 [2021-06-06 00:16:16,370 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:16,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-06 00:16:16,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 220. [2021-06-06 00:16:16,379 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) [2021-06-06 00:16:16,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 524 transitions. [2021-06-06 00:16:16,380 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 524 transitions. Word has length 22 [2021-06-06 00:16:16,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:16,381 INFO L482 AbstractCegarLoop]: Abstraction has 220 states and 524 transitions. [2021-06-06 00:16:16,381 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) [2021-06-06 00:16:16,381 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 524 transitions. [2021-06-06 00:16:16,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:16:16,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:16,382 INFO L554 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] [2021-06-06 00:16:16,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-06 00:16:16,382 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:16,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:16,383 INFO L82 PathProgramCache]: Analyzing trace with hash -602461050, now seen corresponding path program 3 times [2021-06-06 00:16:16,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:16,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801493835] [2021-06-06 00:16:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:16,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:16,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801493835] [2021-06-06 00:16:16,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801493835] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:16:16,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:16:16,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-06 00:16:16,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143563390] [2021-06-06 00:16:16,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:16:16,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:16,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:16:16,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:16:16,515 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) [2021-06-06 00:16:16,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:16,580 INFO L93 Difference]: Finished difference Result 320 states and 768 transitions. [2021-06-06 00:16:16,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:16:16,581 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 [2021-06-06 00:16:16,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:16,584 INFO L225 Difference]: With dead ends: 320 [2021-06-06 00:16:16,586 INFO L226 Difference]: Without dead ends: 280 [2021-06-06 00:16:16,586 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:16,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-06-06 00:16:16,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 218. [2021-06-06 00:16:16,602 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) [2021-06-06 00:16:16,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 517 transitions. [2021-06-06 00:16:16,603 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 517 transitions. Word has length 22 [2021-06-06 00:16:16,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:16,603 INFO L482 AbstractCegarLoop]: Abstraction has 218 states and 517 transitions. [2021-06-06 00:16:16,604 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) [2021-06-06 00:16:16,604 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 517 transitions. [2021-06-06 00:16:16,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:16:16,604 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:16,605 INFO L554 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] [2021-06-06 00:16:16,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-06 00:16:16,605 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:16,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:16,606 INFO L82 PathProgramCache]: Analyzing trace with hash -630863238, now seen corresponding path program 4 times [2021-06-06 00:16:16,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:16,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92744511] [2021-06-06 00:16:16,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:16,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:16,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92744511] [2021-06-06 00:16:16,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92744511] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:16:16,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:16:16,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-06 00:16:16,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892121927] [2021-06-06 00:16:16,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:16:16,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:16,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:16:16,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:16:16,729 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) [2021-06-06 00:16:16,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:16,786 INFO L93 Difference]: Finished difference Result 327 states and 775 transitions. [2021-06-06 00:16:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:16:16,787 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 [2021-06-06 00:16:16,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:16,788 INFO L225 Difference]: With dead ends: 327 [2021-06-06 00:16:16,788 INFO L226 Difference]: Without dead ends: 290 [2021-06-06 00:16:16,789 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:16,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-06-06 00:16:16,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 226. [2021-06-06 00:16:16,795 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) [2021-06-06 00:16:16,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 537 transitions. [2021-06-06 00:16:16,796 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 537 transitions. Word has length 22 [2021-06-06 00:16:16,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:16,796 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 537 transitions. [2021-06-06 00:16:16,796 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) [2021-06-06 00:16:16,796 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 537 transitions. [2021-06-06 00:16:16,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:16:16,797 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:16,797 INFO L554 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] [2021-06-06 00:16:16,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-06 00:16:16,797 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:16,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:16,798 INFO L82 PathProgramCache]: Analyzing trace with hash -2144128130, now seen corresponding path program 5 times [2021-06-06 00:16:16,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:16,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362099862] [2021-06-06 00:16:16,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:16,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:16,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:16,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:16,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362099862] [2021-06-06 00:16:16,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362099862] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:16:16,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:16:16,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-06 00:16:16,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698204967] [2021-06-06 00:16:16,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:16:16,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:16,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:16:16,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:16:16,955 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) [2021-06-06 00:16:17,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:17,034 INFO L93 Difference]: Finished difference Result 333 states and 810 transitions. [2021-06-06 00:16:17,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:16:17,035 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 [2021-06-06 00:16:17,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:17,036 INFO L225 Difference]: With dead ends: 333 [2021-06-06 00:16:17,036 INFO L226 Difference]: Without dead ends: 296 [2021-06-06 00:16:17,037 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:17,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-06 00:16:17,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 242. [2021-06-06 00:16:17,044 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) [2021-06-06 00:16:17,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 587 transitions. [2021-06-06 00:16:17,047 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 587 transitions. Word has length 22 [2021-06-06 00:16:17,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:17,047 INFO L482 AbstractCegarLoop]: Abstraction has 242 states and 587 transitions. [2021-06-06 00:16:17,047 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) [2021-06-06 00:16:17,047 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 587 transitions. [2021-06-06 00:16:17,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:16:17,048 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:17,048 INFO L554 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] [2021-06-06 00:16:17,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-06 00:16:17,049 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:17,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:17,049 INFO L82 PathProgramCache]: Analyzing trace with hash 909995578, now seen corresponding path program 6 times [2021-06-06 00:16:17,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:17,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449776814] [2021-06-06 00:16:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:17,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:17,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449776814] [2021-06-06 00:16:17,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449776814] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:16:17,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:16:17,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-06 00:16:17,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940930379] [2021-06-06 00:16:17,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:16:17,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:17,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:16:17,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:16:17,150 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) [2021-06-06 00:16:17,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:17,216 INFO L93 Difference]: Finished difference Result 337 states and 817 transitions. [2021-06-06 00:16:17,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:16:17,217 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 [2021-06-06 00:16:17,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:17,219 INFO L225 Difference]: With dead ends: 337 [2021-06-06 00:16:17,219 INFO L226 Difference]: Without dead ends: 297 [2021-06-06 00:16:17,222 INFO L810 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 [2021-06-06 00:16:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-06 00:16:17,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 224. [2021-06-06 00:16:17,230 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) [2021-06-06 00:16:17,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 532 transitions. [2021-06-06 00:16:17,232 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 532 transitions. Word has length 22 [2021-06-06 00:16:17,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:17,236 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 532 transitions. [2021-06-06 00:16:17,236 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) [2021-06-06 00:16:17,236 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 532 transitions. [2021-06-06 00:16:17,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:16:17,238 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:17,238 INFO L554 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] [2021-06-06 00:16:17,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-06 00:16:17,238 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:17,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:17,238 INFO L82 PathProgramCache]: Analyzing trace with hash 2086549228, now seen corresponding path program 1 times [2021-06-06 00:16:17,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:17,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189940781] [2021-06-06 00:16:17,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:17,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:17,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:17,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189940781] [2021-06-06 00:16:17,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189940781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:17,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75383255] [2021-06-06 00:16:17,278 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 [2021-06-06 00:16:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:17,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-06 00:16:17,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:17,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:17,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75383255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:17,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:17,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-06 00:16:17,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398468803] [2021-06-06 00:16:17,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:16:17,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:17,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:16:17,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:16:17,493 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) [2021-06-06 00:16:17,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:17,575 INFO L93 Difference]: Finished difference Result 342 states and 809 transitions. [2021-06-06 00:16:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:16:17,575 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 [2021-06-06 00:16:17,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:17,577 INFO L225 Difference]: With dead ends: 342 [2021-06-06 00:16:17,577 INFO L226 Difference]: Without dead ends: 342 [2021-06-06 00:16:17,577 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:17,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-06 00:16:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 213. [2021-06-06 00:16:17,586 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) [2021-06-06 00:16:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 514 transitions. [2021-06-06 00:16:17,587 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 514 transitions. Word has length 25 [2021-06-06 00:16:17,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:17,587 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 514 transitions. [2021-06-06 00:16:17,588 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) [2021-06-06 00:16:17,588 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 514 transitions. [2021-06-06 00:16:17,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:16:17,589 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:17,589 INFO L554 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] [2021-06-06 00:16:17,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-06 00:16:17,805 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:17,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:17,805 INFO L82 PathProgramCache]: Analyzing trace with hash 785545354, now seen corresponding path program 1 times [2021-06-06 00:16:17,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:17,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636117001] [2021-06-06 00:16:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:17,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:17,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:17,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636117001] [2021-06-06 00:16:17,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636117001] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:16:17,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:16:17,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:16:17,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634624460] [2021-06-06 00:16:17,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:16:17,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:17,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:16:17,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:16:17,833 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) [2021-06-06 00:16:17,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:17,886 INFO L93 Difference]: Finished difference Result 361 states and 847 transitions. [2021-06-06 00:16:17,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:16:17,886 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 [2021-06-06 00:16:17,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:17,888 INFO L225 Difference]: With dead ends: 361 [2021-06-06 00:16:17,888 INFO L226 Difference]: Without dead ends: 337 [2021-06-06 00:16:17,888 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:16:17,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-06 00:16:17,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 213. [2021-06-06 00:16:17,892 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) [2021-06-06 00:16:17,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 509 transitions. [2021-06-06 00:16:17,892 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 509 transitions. Word has length 25 [2021-06-06 00:16:17,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:17,892 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 509 transitions. [2021-06-06 00:16:17,892 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) [2021-06-06 00:16:17,892 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 509 transitions. [2021-06-06 00:16:17,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:16:17,893 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:17,893 INFO L554 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] [2021-06-06 00:16:17,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-06 00:16:17,893 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:17,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:17,894 INFO L82 PathProgramCache]: Analyzing trace with hash 727801610, now seen corresponding path program 2 times [2021-06-06 00:16:17,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:17,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022572820] [2021-06-06 00:16:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:17,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:17,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:17,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022572820] [2021-06-06 00:16:17,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022572820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:17,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157862107] [2021-06-06 00:16:17,924 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 [2021-06-06 00:16:17,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:17,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:17,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-06 00:16:17,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:18,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157862107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:18,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:18,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-06 00:16:18,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079170783] [2021-06-06 00:16:18,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-06 00:16:18,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:18,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-06 00:16:18,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:16:18,063 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) [2021-06-06 00:16:18,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:18,152 INFO L93 Difference]: Finished difference Result 495 states and 1157 transitions. [2021-06-06 00:16:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:16:18,155 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 [2021-06-06 00:16:18,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:18,157 INFO L225 Difference]: With dead ends: 495 [2021-06-06 00:16:18,157 INFO L226 Difference]: Without dead ends: 495 [2021-06-06 00:16:18,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:16:18,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-06 00:16:18,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 221. [2021-06-06 00:16:18,164 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) [2021-06-06 00:16:18,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 535 transitions. [2021-06-06 00:16:18,165 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 535 transitions. Word has length 25 [2021-06-06 00:16:18,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:18,167 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 535 transitions. [2021-06-06 00:16:18,167 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) [2021-06-06 00:16:18,167 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 535 transitions. [2021-06-06 00:16:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:16:18,168 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:18,168 INFO L554 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] [2021-06-06 00:16:18,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:18,391 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:18,392 INFO L82 PathProgramCache]: Analyzing trace with hash 517104564, now seen corresponding path program 2 times [2021-06-06 00:16:18,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:18,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086582241] [2021-06-06 00:16:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:18,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:18,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:18,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086582241] [2021-06-06 00:16:18,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086582241] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:16:18,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:16:18,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:16:18,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123567904] [2021-06-06 00:16:18,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:16:18,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:18,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:16:18,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:16:18,414 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) [2021-06-06 00:16:18,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:18,461 INFO L93 Difference]: Finished difference Result 341 states and 802 transitions. [2021-06-06 00:16:18,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:16:18,461 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 [2021-06-06 00:16:18,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:18,463 INFO L225 Difference]: With dead ends: 341 [2021-06-06 00:16:18,463 INFO L226 Difference]: Without dead ends: 335 [2021-06-06 00:16:18,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:16:18,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-06 00:16:18,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 245. [2021-06-06 00:16:18,469 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) [2021-06-06 00:16:18,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 595 transitions. [2021-06-06 00:16:18,470 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 595 transitions. Word has length 25 [2021-06-06 00:16:18,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:18,470 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 595 transitions. [2021-06-06 00:16:18,470 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) [2021-06-06 00:16:18,470 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 595 transitions. [2021-06-06 00:16:18,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:16:18,471 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:18,471 INFO L554 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] [2021-06-06 00:16:18,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-06 00:16:18,471 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:18,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:18,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1245856382, now seen corresponding path program 3 times [2021-06-06 00:16:18,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:18,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660210713] [2021-06-06 00:16:18,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:18,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:18,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660210713] [2021-06-06 00:16:18,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660210713] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:16:18,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:16:18,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:16:18,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278230711] [2021-06-06 00:16:18,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:16:18,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:18,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:16:18,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:16:18,492 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) [2021-06-06 00:16:18,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:18,542 INFO L93 Difference]: Finished difference Result 284 states and 686 transitions. [2021-06-06 00:16:18,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:16:18,543 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 [2021-06-06 00:16:18,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:18,544 INFO L225 Difference]: With dead ends: 284 [2021-06-06 00:16:18,544 INFO L226 Difference]: Without dead ends: 284 [2021-06-06 00:16:18,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:16:18,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-06 00:16:18,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 221. [2021-06-06 00:16:18,550 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) [2021-06-06 00:16:18,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 533 transitions. [2021-06-06 00:16:18,551 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 533 transitions. Word has length 25 [2021-06-06 00:16:18,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:18,551 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 533 transitions. [2021-06-06 00:16:18,551 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) [2021-06-06 00:16:18,551 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 533 transitions. [2021-06-06 00:16:18,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:16:18,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:18,552 INFO L554 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] [2021-06-06 00:16:18,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-06 00:16:18,552 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:18,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:18,552 INFO L82 PathProgramCache]: Analyzing trace with hash 868885228, now seen corresponding path program 3 times [2021-06-06 00:16:18,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:18,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113758364] [2021-06-06 00:16:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:18,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:18,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113758364] [2021-06-06 00:16:18,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113758364] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:16:18,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:16:18,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:16:18,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746809106] [2021-06-06 00:16:18,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:16:18,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:18,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:16:18,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:16:18,588 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) [2021-06-06 00:16:18,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:18,645 INFO L93 Difference]: Finished difference Result 394 states and 930 transitions. [2021-06-06 00:16:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:16:18,646 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 [2021-06-06 00:16:18,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:18,647 INFO L225 Difference]: With dead ends: 394 [2021-06-06 00:16:18,648 INFO L226 Difference]: Without dead ends: 387 [2021-06-06 00:16:18,648 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:16:18,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-06-06 00:16:18,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 221. [2021-06-06 00:16:18,653 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) [2021-06-06 00:16:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 531 transitions. [2021-06-06 00:16:18,654 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 531 transitions. Word has length 25 [2021-06-06 00:16:18,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:18,654 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 531 transitions. [2021-06-06 00:16:18,654 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) [2021-06-06 00:16:18,654 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 531 transitions. [2021-06-06 00:16:18,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:16:18,655 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:18,655 INFO L554 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] [2021-06-06 00:16:18,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-06 00:16:18,655 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:18,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:18,655 INFO L82 PathProgramCache]: Analyzing trace with hash -241548014, now seen corresponding path program 4 times [2021-06-06 00:16:18,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:18,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714105413] [2021-06-06 00:16:18,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:18,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:18,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:18,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714105413] [2021-06-06 00:16:18,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714105413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:18,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659100294] [2021-06-06 00:16:18,673 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 [2021-06-06 00:16:18,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:16:18,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:18,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-06 00:16:18,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:18,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:18,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659100294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:18,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:18,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-06 00:16:18,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777229259] [2021-06-06 00:16:18,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-06 00:16:18,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:18,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-06 00:16:18,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-06 00:16:18,760 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) [2021-06-06 00:16:18,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:18,820 INFO L93 Difference]: Finished difference Result 340 states and 811 transitions. [2021-06-06 00:16:18,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:16:18,821 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 [2021-06-06 00:16:18,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:18,822 INFO L225 Difference]: With dead ends: 340 [2021-06-06 00:16:18,822 INFO L226 Difference]: Without dead ends: 340 [2021-06-06 00:16:18,823 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:18,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-06 00:16:18,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 209. [2021-06-06 00:16:18,827 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) [2021-06-06 00:16:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 505 transitions. [2021-06-06 00:16:18,828 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 505 transitions. Word has length 25 [2021-06-06 00:16:18,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:18,828 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 505 transitions. [2021-06-06 00:16:18,828 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) [2021-06-06 00:16:18,828 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 505 transitions. [2021-06-06 00:16:18,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:16:18,829 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:18,829 INFO L554 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] [2021-06-06 00:16:19,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-06 00:16:19,041 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:19,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:19,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1742404094, now seen corresponding path program 4 times [2021-06-06 00:16:19,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:19,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175441812] [2021-06-06 00:16:19,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:19,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:19,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175441812] [2021-06-06 00:16:19,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175441812] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:16:19,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:16:19,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:16:19,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280088143] [2021-06-06 00:16:19,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:16:19,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:19,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:16:19,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:16:19,061 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) [2021-06-06 00:16:19,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:19,100 INFO L93 Difference]: Finished difference Result 348 states and 822 transitions. [2021-06-06 00:16:19,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:16:19,100 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 [2021-06-06 00:16:19,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:19,102 INFO L225 Difference]: With dead ends: 348 [2021-06-06 00:16:19,102 INFO L226 Difference]: Without dead ends: 330 [2021-06-06 00:16:19,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:16:19,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-06 00:16:19,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 209. [2021-06-06 00:16:19,107 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) [2021-06-06 00:16:19,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-06-06 00:16:19,107 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-06-06 00:16:19,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:19,108 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-06-06 00:16:19,108 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) [2021-06-06 00:16:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-06-06 00:16:19,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:16:19,108 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:19,108 INFO L554 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] [2021-06-06 00:16:19,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-06 00:16:19,109 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:19,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:19,109 INFO L82 PathProgramCache]: Analyzing trace with hash 2089386992, now seen corresponding path program 5 times [2021-06-06 00:16:19,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:19,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095948014] [2021-06-06 00:16:19,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:19,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:19,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095948014] [2021-06-06 00:16:19,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095948014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:19,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659409114] [2021-06-06 00:16:19,126 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 [2021-06-06 00:16:19,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:19,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:19,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-06 00:16:19,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:19,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659409114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:19,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:19,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-06 00:16:19,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181417700] [2021-06-06 00:16:19,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-06 00:16:19,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:19,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-06 00:16:19,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:16:19,214 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) [2021-06-06 00:16:19,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:19,288 INFO L93 Difference]: Finished difference Result 379 states and 891 transitions. [2021-06-06 00:16:19,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:16:19,288 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 [2021-06-06 00:16:19,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:19,290 INFO L225 Difference]: With dead ends: 379 [2021-06-06 00:16:19,290 INFO L226 Difference]: Without dead ends: 379 [2021-06-06 00:16:19,290 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:16:19,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-06 00:16:19,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 209. [2021-06-06 00:16:19,295 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) [2021-06-06 00:16:19,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-06-06 00:16:19,296 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-06-06 00:16:19,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:19,296 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-06-06 00:16:19,296 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) [2021-06-06 00:16:19,296 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-06-06 00:16:19,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:16:19,297 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:19,297 INFO L554 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] [2021-06-06 00:16:19,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:19,517 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:19,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:19,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1878689946, now seen corresponding path program 5 times [2021-06-06 00:16:19,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:19,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784446440] [2021-06-06 00:16:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:19,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:19,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784446440] [2021-06-06 00:16:19,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784446440] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:16:19,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:16:19,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:16:19,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224980673] [2021-06-06 00:16:19,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:16:19,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:19,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:16:19,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:16:19,546 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) [2021-06-06 00:16:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:19,600 INFO L93 Difference]: Finished difference Result 381 states and 892 transitions. [2021-06-06 00:16:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:16:19,601 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 [2021-06-06 00:16:19,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:19,603 INFO L225 Difference]: With dead ends: 381 [2021-06-06 00:16:19,603 INFO L226 Difference]: Without dead ends: 375 [2021-06-06 00:16:19,603 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:16:19,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-06 00:16:19,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 233. [2021-06-06 00:16:19,608 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) [2021-06-06 00:16:19,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 561 transitions. [2021-06-06 00:16:19,609 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 561 transitions. Word has length 25 [2021-06-06 00:16:19,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:19,609 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 561 transitions. [2021-06-06 00:16:19,609 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) [2021-06-06 00:16:19,609 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 561 transitions. [2021-06-06 00:16:19,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:16:19,610 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:19,610 INFO L554 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] [2021-06-06 00:16:19,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-06 00:16:19,610 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:19,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:19,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1687525532, now seen corresponding path program 6 times [2021-06-06 00:16:19,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:19,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605462807] [2021-06-06 00:16:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:19,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:19,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:19,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605462807] [2021-06-06 00:16:19,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605462807] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:16:19,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:16:19,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:16:19,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137559805] [2021-06-06 00:16:19,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:16:19,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:19,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:16:19,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:16:19,633 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) [2021-06-06 00:16:19,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:19,683 INFO L93 Difference]: Finished difference Result 311 states and 744 transitions. [2021-06-06 00:16:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:16:19,683 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 [2021-06-06 00:16:19,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:19,684 INFO L225 Difference]: With dead ends: 311 [2021-06-06 00:16:19,684 INFO L226 Difference]: Without dead ends: 311 [2021-06-06 00:16:19,685 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:16:19,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-06 00:16:19,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 209. [2021-06-06 00:16:19,689 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) [2021-06-06 00:16:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 499 transitions. [2021-06-06 00:16:19,690 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 499 transitions. Word has length 25 [2021-06-06 00:16:19,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:19,690 INFO L482 AbstractCegarLoop]: Abstraction has 209 states and 499 transitions. [2021-06-06 00:16:19,690 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) [2021-06-06 00:16:19,690 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 499 transitions. [2021-06-06 00:16:19,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:16:19,691 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:19,691 INFO L554 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] [2021-06-06 00:16:19,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-06 00:16:19,691 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:19,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:19,691 INFO L82 PathProgramCache]: Analyzing trace with hash -2064496686, now seen corresponding path program 6 times [2021-06-06 00:16:19,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:19,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368060189] [2021-06-06 00:16:19,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:19,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:19,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:19,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368060189] [2021-06-06 00:16:19,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368060189] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:16:19,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:16:19,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-06 00:16:19,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067458273] [2021-06-06 00:16:19,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:16:19,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:19,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:16:19,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:16:19,708 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) [2021-06-06 00:16:19,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:19,748 INFO L93 Difference]: Finished difference Result 256 states and 607 transitions. [2021-06-06 00:16:19,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-06 00:16:19,749 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 [2021-06-06 00:16:19,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:19,750 INFO L225 Difference]: With dead ends: 256 [2021-06-06 00:16:19,750 INFO L226 Difference]: Without dead ends: 249 [2021-06-06 00:16:19,750 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:16:19,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-06 00:16:19,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 207. [2021-06-06 00:16:19,754 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) [2021-06-06 00:16:19,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 492 transitions. [2021-06-06 00:16:19,755 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 492 transitions. Word has length 25 [2021-06-06 00:16:19,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:19,755 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 492 transitions. [2021-06-06 00:16:19,755 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) [2021-06-06 00:16:19,755 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 492 transitions. [2021-06-06 00:16:19,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:19,755 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:19,755 INFO L554 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] [2021-06-06 00:16:19,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-06 00:16:19,756 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:19,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:19,756 INFO L82 PathProgramCache]: Analyzing trace with hash -2038135170, now seen corresponding path program 1 times [2021-06-06 00:16:19,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:19,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754130818] [2021-06-06 00:16:19,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:19,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:19,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754130818] [2021-06-06 00:16:19,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754130818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:19,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473342740] [2021-06-06 00:16:19,870 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 [2021-06-06 00:16:19,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:19,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:16:19,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:20,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:20,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473342740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:20,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:20,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-06 00:16:20,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938192928] [2021-06-06 00:16:20,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:16:20,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:20,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:16:20,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:16:20,006 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) [2021-06-06 00:16:20,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:20,115 INFO L93 Difference]: Finished difference Result 387 states and 917 transitions. [2021-06-06 00:16:20,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:16:20,116 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 [2021-06-06 00:16:20,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:20,118 INFO L225 Difference]: With dead ends: 387 [2021-06-06 00:16:20,118 INFO L226 Difference]: Without dead ends: 349 [2021-06-06 00:16:20,118 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:16:20,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-06 00:16:20,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 246. [2021-06-06 00:16:20,124 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) [2021-06-06 00:16:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 576 transitions. [2021-06-06 00:16:20,125 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 576 transitions. Word has length 28 [2021-06-06 00:16:20,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:20,125 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 576 transitions. [2021-06-06 00:16:20,125 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) [2021-06-06 00:16:20,125 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 576 transitions. [2021-06-06 00:16:20,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:20,126 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:20,126 INFO L554 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] [2021-06-06 00:16:20,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:20,347 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:20,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:20,348 INFO L82 PathProgramCache]: Analyzing trace with hash -957499002, now seen corresponding path program 2 times [2021-06-06 00:16:20,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:20,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903206973] [2021-06-06 00:16:20,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:20,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:20,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:20,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903206973] [2021-06-06 00:16:20,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903206973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:20,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715259023] [2021-06-06 00:16:20,450 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 [2021-06-06 00:16:20,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:20,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:20,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:16:20,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:20,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715259023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:20,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:20,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-06 00:16:20,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306211863] [2021-06-06 00:16:20,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:16:20,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:20,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:16:20,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:16:20,568 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) [2021-06-06 00:16:20,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:20,666 INFO L93 Difference]: Finished difference Result 496 states and 1252 transitions. [2021-06-06 00:16:20,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:16:20,666 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 [2021-06-06 00:16:20,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:20,668 INFO L225 Difference]: With dead ends: 496 [2021-06-06 00:16:20,668 INFO L226 Difference]: Without dead ends: 459 [2021-06-06 00:16:20,669 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:16:20,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-06-06 00:16:20,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 337. [2021-06-06 00:16:20,677 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) [2021-06-06 00:16:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 833 transitions. [2021-06-06 00:16:20,678 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 833 transitions. Word has length 28 [2021-06-06 00:16:20,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:20,678 INFO L482 AbstractCegarLoop]: Abstraction has 337 states and 833 transitions. [2021-06-06 00:16:20,679 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) [2021-06-06 00:16:20,679 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 833 transitions. [2021-06-06 00:16:20,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:20,679 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:20,679 INFO L554 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] [2021-06-06 00:16:20,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:20,893 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:20,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:20,893 INFO L82 PathProgramCache]: Analyzing trace with hash -361393086, now seen corresponding path program 3 times [2021-06-06 00:16:20,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:20,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406908029] [2021-06-06 00:16:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:20,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:20,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:20,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406908029] [2021-06-06 00:16:20,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406908029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:20,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45209280] [2021-06-06 00:16:20,973 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 [2021-06-06 00:16:21,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:16:21,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:21,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:16:21,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:21,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45209280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:21,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:21,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-06 00:16:21,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023612554] [2021-06-06 00:16:21,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:16:21,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:21,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:16:21,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:16:21,096 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) [2021-06-06 00:16:21,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:21,207 INFO L93 Difference]: Finished difference Result 504 states and 1265 transitions. [2021-06-06 00:16:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:16:21,207 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 [2021-06-06 00:16:21,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:21,209 INFO L225 Difference]: With dead ends: 504 [2021-06-06 00:16:21,209 INFO L226 Difference]: Without dead ends: 462 [2021-06-06 00:16:21,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:16:21,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-06 00:16:21,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 331. [2021-06-06 00:16:21,217 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) [2021-06-06 00:16:21,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 816 transitions. [2021-06-06 00:16:21,218 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 816 transitions. Word has length 28 [2021-06-06 00:16:21,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:21,218 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 816 transitions. [2021-06-06 00:16:21,218 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) [2021-06-06 00:16:21,219 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 816 transitions. [2021-06-06 00:16:21,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:21,219 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:21,219 INFO L554 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] [2021-06-06 00:16:21,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:21,437 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:21,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1418916614, now seen corresponding path program 4 times [2021-06-06 00:16:21,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:21,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391291533] [2021-06-06 00:16:21,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:21,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:21,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:21,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391291533] [2021-06-06 00:16:21,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391291533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:21,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839738086] [2021-06-06 00:16:21,555 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 [2021-06-06 00:16:21,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:16:21,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:21,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:16:21,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:21,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839738086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:21,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:21,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-06 00:16:21,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480908647] [2021-06-06 00:16:21,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:16:21,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:21,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:16:21,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:16:21,671 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) [2021-06-06 00:16:21,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:21,792 INFO L93 Difference]: Finished difference Result 519 states and 1295 transitions. [2021-06-06 00:16:21,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:16:21,793 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 [2021-06-06 00:16:21,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:21,795 INFO L225 Difference]: With dead ends: 519 [2021-06-06 00:16:21,795 INFO L226 Difference]: Without dead ends: 481 [2021-06-06 00:16:21,795 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:16:21,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-06-06 00:16:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 349. [2021-06-06 00:16:21,803 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) [2021-06-06 00:16:21,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 867 transitions. [2021-06-06 00:16:21,804 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 867 transitions. Word has length 28 [2021-06-06 00:16:21,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:21,804 INFO L482 AbstractCegarLoop]: Abstraction has 349 states and 867 transitions. [2021-06-06 00:16:21,804 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) [2021-06-06 00:16:21,804 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 867 transitions. [2021-06-06 00:16:21,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:21,805 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:21,805 INFO L554 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] [2021-06-06 00:16:22,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-06 00:16:22,017 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:22,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:22,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1124070530, now seen corresponding path program 5 times [2021-06-06 00:16:22,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:22,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072208658] [2021-06-06 00:16:22,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:22,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:22,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072208658] [2021-06-06 00:16:22,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072208658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:22,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399306522] [2021-06-06 00:16:22,115 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 [2021-06-06 00:16:22,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:16:22,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:22,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:16:22,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:22,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399306522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:22,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:22,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:16:22,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576170610] [2021-06-06 00:16:22,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:16:22,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:22,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:16:22,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:16:22,265 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) [2021-06-06 00:16:22,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:22,380 INFO L93 Difference]: Finished difference Result 530 states and 1325 transitions. [2021-06-06 00:16:22,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:16:22,381 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 [2021-06-06 00:16:22,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:22,383 INFO L225 Difference]: With dead ends: 530 [2021-06-06 00:16:22,383 INFO L226 Difference]: Without dead ends: 493 [2021-06-06 00:16:22,383 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:16:22,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-06 00:16:22,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 439. [2021-06-06 00:16:22,392 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) [2021-06-06 00:16:22,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1118 transitions. [2021-06-06 00:16:22,394 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1118 transitions. Word has length 28 [2021-06-06 00:16:22,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:22,394 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1118 transitions. [2021-06-06 00:16:22,394 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) [2021-06-06 00:16:22,394 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1118 transitions. [2021-06-06 00:16:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:22,395 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:22,395 INFO L554 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] [2021-06-06 00:16:22,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:22,613 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:22,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:22,613 INFO L82 PathProgramCache]: Analyzing trace with hash 152433534, now seen corresponding path program 6 times [2021-06-06 00:16:22,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:22,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321060012] [2021-06-06 00:16:22,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:22,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:22,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321060012] [2021-06-06 00:16:22,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321060012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:22,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879653365] [2021-06-06 00:16:22,683 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 [2021-06-06 00:16:22,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:16:22,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:22,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:16:22,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:22,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:22,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879653365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:22,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:22,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-06 00:16:22,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902298234] [2021-06-06 00:16:22,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:16:22,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:22,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:16:22,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:16:22,812 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) [2021-06-06 00:16:22,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:22,888 INFO L93 Difference]: Finished difference Result 526 states and 1316 transitions. [2021-06-06 00:16:22,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:16:22,888 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 [2021-06-06 00:16:22,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:22,890 INFO L225 Difference]: With dead ends: 526 [2021-06-06 00:16:22,890 INFO L226 Difference]: Without dead ends: 486 [2021-06-06 00:16:22,890 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 78.6ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:16:22,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-06 00:16:22,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 429. [2021-06-06 00:16:22,899 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) [2021-06-06 00:16:22,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1091 transitions. [2021-06-06 00:16:22,901 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1091 transitions. Word has length 28 [2021-06-06 00:16:22,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:22,901 INFO L482 AbstractCegarLoop]: Abstraction has 429 states and 1091 transitions. [2021-06-06 00:16:22,901 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) [2021-06-06 00:16:22,901 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1091 transitions. [2021-06-06 00:16:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:22,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:22,902 INFO L554 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] [2021-06-06 00:16:23,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:23,117 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:23,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:23,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1703038790, now seen corresponding path program 7 times [2021-06-06 00:16:23,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:23,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478526417] [2021-06-06 00:16:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:23,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:23,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:23,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478526417] [2021-06-06 00:16:23,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478526417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:23,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005514099] [2021-06-06 00:16:23,226 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 [2021-06-06 00:16:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:23,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:16:23,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:23,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:23,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005514099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:23,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:23,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:16:23,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227216171] [2021-06-06 00:16:23,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:16:23,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:23,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:16:23,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:16:23,349 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) [2021-06-06 00:16:23,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:23,442 INFO L93 Difference]: Finished difference Result 623 states and 1567 transitions. [2021-06-06 00:16:23,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:16:23,442 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 [2021-06-06 00:16:23,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:23,445 INFO L225 Difference]: With dead ends: 623 [2021-06-06 00:16:23,445 INFO L226 Difference]: Without dead ends: 585 [2021-06-06 00:16:23,445 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:16:23,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-06 00:16:23,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 479. [2021-06-06 00:16:23,455 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) [2021-06-06 00:16:23,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1242 transitions. [2021-06-06 00:16:23,457 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1242 transitions. Word has length 28 [2021-06-06 00:16:23,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:23,457 INFO L482 AbstractCegarLoop]: Abstraction has 479 states and 1242 transitions. [2021-06-06 00:16:23,457 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) [2021-06-06 00:16:23,457 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1242 transitions. [2021-06-06 00:16:23,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:23,458 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:23,458 INFO L554 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] [2021-06-06 00:16:23,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-06 00:16:23,673 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:23,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:23,673 INFO L82 PathProgramCache]: Analyzing trace with hash -908403066, now seen corresponding path program 8 times [2021-06-06 00:16:23,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:23,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848573237] [2021-06-06 00:16:23,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:23,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:23,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848573237] [2021-06-06 00:16:23,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848573237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:23,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951330863] [2021-06-06 00:16:23,824 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 [2021-06-06 00:16:23,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:23,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:23,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:16:23,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:23,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951330863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:23,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:23,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-06 00:16:23,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835741802] [2021-06-06 00:16:23,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:16:23,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:23,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:16:23,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:16:23,914 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) [2021-06-06 00:16:24,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:24,000 INFO L93 Difference]: Finished difference Result 774 states and 2027 transitions. [2021-06-06 00:16:24,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:16:24,000 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 [2021-06-06 00:16:24,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:24,004 INFO L225 Difference]: With dead ends: 774 [2021-06-06 00:16:24,004 INFO L226 Difference]: Without dead ends: 737 [2021-06-06 00:16:24,004 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:16:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-06-06 00:16:24,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 491. [2021-06-06 00:16:24,014 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) [2021-06-06 00:16:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1272 transitions. [2021-06-06 00:16:24,016 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1272 transitions. Word has length 28 [2021-06-06 00:16:24,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:24,016 INFO L482 AbstractCegarLoop]: Abstraction has 491 states and 1272 transitions. [2021-06-06 00:16:24,016 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) [2021-06-06 00:16:24,016 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1272 transitions. [2021-06-06 00:16:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:24,017 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:24,017 INFO L554 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] [2021-06-06 00:16:24,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-06 00:16:24,230 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:24,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:24,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1688905474, now seen corresponding path program 9 times [2021-06-06 00:16:24,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:24,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510763100] [2021-06-06 00:16:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:24,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:24,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510763100] [2021-06-06 00:16:24,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510763100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:24,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737335619] [2021-06-06 00:16:24,338 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 [2021-06-06 00:16:24,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:16:24,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:24,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:16:24,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:24,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737335619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:24,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:24,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-06 00:16:24,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890472830] [2021-06-06 00:16:24,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:16:24,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:24,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:16:24,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:16:24,450 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) [2021-06-06 00:16:24,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:24,541 INFO L93 Difference]: Finished difference Result 766 states and 2025 transitions. [2021-06-06 00:16:24,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:16:24,541 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 [2021-06-06 00:16:24,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:24,545 INFO L225 Difference]: With dead ends: 766 [2021-06-06 00:16:24,545 INFO L226 Difference]: Without dead ends: 729 [2021-06-06 00:16:24,545 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:16:24,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-06-06 00:16:24,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 509. [2021-06-06 00:16:24,557 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) [2021-06-06 00:16:24,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1323 transitions. [2021-06-06 00:16:24,559 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1323 transitions. Word has length 28 [2021-06-06 00:16:24,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:24,559 INFO L482 AbstractCegarLoop]: Abstraction has 509 states and 1323 transitions. [2021-06-06 00:16:24,559 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) [2021-06-06 00:16:24,559 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1323 transitions. [2021-06-06 00:16:24,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:24,560 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:24,560 INFO L554 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] [2021-06-06 00:16:24,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-06 00:16:24,781 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:24,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:24,781 INFO L82 PathProgramCache]: Analyzing trace with hash 705112774, now seen corresponding path program 10 times [2021-06-06 00:16:24,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:24,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796776502] [2021-06-06 00:16:24,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:24,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:24,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:24,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796776502] [2021-06-06 00:16:24,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796776502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:24,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879366415] [2021-06-06 00:16:24,859 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 [2021-06-06 00:16:24,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:16:24,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:24,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:16:24,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:24,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:24,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879366415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:24,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:24,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-06 00:16:24,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561777410] [2021-06-06 00:16:24,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:16:24,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:24,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:16:24,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:16:24,965 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) [2021-06-06 00:16:25,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:25,109 INFO L93 Difference]: Finished difference Result 860 states and 2316 transitions. [2021-06-06 00:16:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:16:25,109 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 [2021-06-06 00:16:25,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:25,113 INFO L225 Difference]: With dead ends: 860 [2021-06-06 00:16:25,113 INFO L226 Difference]: Without dead ends: 823 [2021-06-06 00:16:25,113 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:16:25,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-06-06 00:16:25,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 587. [2021-06-06 00:16:25,125 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) [2021-06-06 00:16:25,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1550 transitions. [2021-06-06 00:16:25,127 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1550 transitions. Word has length 28 [2021-06-06 00:16:25,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:25,127 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1550 transitions. [2021-06-06 00:16:25,127 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) [2021-06-06 00:16:25,127 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1550 transitions. [2021-06-06 00:16:25,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:25,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:25,129 INFO L554 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] [2021-06-06 00:16:25,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:25,353 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:25,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:25,353 INFO L82 PathProgramCache]: Analyzing trace with hash 586029762, now seen corresponding path program 11 times [2021-06-06 00:16:25,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:25,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366287084] [2021-06-06 00:16:25,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:25,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:25,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366287084] [2021-06-06 00:16:25,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366287084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:25,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629085725] [2021-06-06 00:16:25,448 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 [2021-06-06 00:16:25,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:25,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:25,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:16:25,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:25,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:25,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629085725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:25,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:25,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-06 00:16:25,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012181515] [2021-06-06 00:16:25,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:16:25,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:25,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:16:25,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:16:25,575 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) [2021-06-06 00:16:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:25,689 INFO L93 Difference]: Finished difference Result 864 states and 2321 transitions. [2021-06-06 00:16:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:16:25,690 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 [2021-06-06 00:16:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:25,693 INFO L225 Difference]: With dead ends: 864 [2021-06-06 00:16:25,693 INFO L226 Difference]: Without dead ends: 822 [2021-06-06 00:16:25,694 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:16:25,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-06-06 00:16:25,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 571. [2021-06-06 00:16:25,707 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) [2021-06-06 00:16:25,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1508 transitions. [2021-06-06 00:16:25,708 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1508 transitions. Word has length 28 [2021-06-06 00:16:25,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:25,709 INFO L482 AbstractCegarLoop]: Abstraction has 571 states and 1508 transitions. [2021-06-06 00:16:25,709 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) [2021-06-06 00:16:25,709 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1508 transitions. [2021-06-06 00:16:25,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:25,710 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:25,710 INFO L554 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] [2021-06-06 00:16:25,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-06 00:16:25,925 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:25,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:25,925 INFO L82 PathProgramCache]: Analyzing trace with hash -645966640, now seen corresponding path program 12 times [2021-06-06 00:16:25,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:25,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869860352] [2021-06-06 00:16:25,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:26,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:26,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869860352] [2021-06-06 00:16:26,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869860352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:26,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898559969] [2021-06-06 00:16:26,029 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 [2021-06-06 00:16:26,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:16:26,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:26,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:16:26,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:26,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898559969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:26,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:26,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:16:26,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260662810] [2021-06-06 00:16:26,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:16:26,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:26,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:16:26,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:16:26,164 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) [2021-06-06 00:16:26,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:26,261 INFO L93 Difference]: Finished difference Result 752 states and 1956 transitions. [2021-06-06 00:16:26,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:16:26,261 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 [2021-06-06 00:16:26,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:26,264 INFO L225 Difference]: With dead ends: 752 [2021-06-06 00:16:26,264 INFO L226 Difference]: Without dead ends: 715 [2021-06-06 00:16:26,265 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 122.5ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:16:26,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-06-06 00:16:26,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 559. [2021-06-06 00:16:26,277 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) [2021-06-06 00:16:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1474 transitions. [2021-06-06 00:16:26,278 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1474 transitions. Word has length 28 [2021-06-06 00:16:26,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:26,279 INFO L482 AbstractCegarLoop]: Abstraction has 559 states and 1474 transitions. [2021-06-06 00:16:26,279 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) [2021-06-06 00:16:26,279 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1474 transitions. [2021-06-06 00:16:26,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:26,280 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:26,280 INFO L554 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] [2021-06-06 00:16:26,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:26,504 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:26,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:26,505 INFO L82 PathProgramCache]: Analyzing trace with hash 638629600, now seen corresponding path program 13 times [2021-06-06 00:16:26,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:26,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455120543] [2021-06-06 00:16:26,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:26,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:26,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455120543] [2021-06-06 00:16:26,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455120543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:26,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355409378] [2021-06-06 00:16:26,576 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 [2021-06-06 00:16:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:26,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:16:26,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:26,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355409378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:26,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:26,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-06 00:16:26,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667864858] [2021-06-06 00:16:26,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:16:26,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:26,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:16:26,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:16:26,691 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) [2021-06-06 00:16:26,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:26,784 INFO L93 Difference]: Finished difference Result 718 states and 1889 transitions. [2021-06-06 00:16:26,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:16:26,785 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 [2021-06-06 00:16:26,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:26,787 INFO L225 Difference]: With dead ends: 718 [2021-06-06 00:16:26,788 INFO L226 Difference]: Without dead ends: 681 [2021-06-06 00:16:26,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:16:26,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-06-06 00:16:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 629. [2021-06-06 00:16:26,799 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) [2021-06-06 00:16:26,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1681 transitions. [2021-06-06 00:16:26,801 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1681 transitions. Word has length 28 [2021-06-06 00:16:26,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:26,801 INFO L482 AbstractCegarLoop]: Abstraction has 629 states and 1681 transitions. [2021-06-06 00:16:26,801 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) [2021-06-06 00:16:26,801 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1681 transitions. [2021-06-06 00:16:26,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:26,802 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:26,802 INFO L554 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] [2021-06-06 00:16:27,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-06 00:16:27,017 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:27,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:27,017 INFO L82 PathProgramCache]: Analyzing trace with hash 519546588, now seen corresponding path program 14 times [2021-06-06 00:16:27,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:27,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944830552] [2021-06-06 00:16:27,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:16:27,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:27,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944830552] [2021-06-06 00:16:27,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944830552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:27,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791527885] [2021-06-06 00:16:27,087 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 [2021-06-06 00:16:27,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:27,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:27,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:16:27,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:27,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791527885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:27,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:27,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-06 00:16:27,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711982885] [2021-06-06 00:16:27,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:16:27,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:27,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:16:27,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:16:27,204 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) [2021-06-06 00:16:27,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:27,272 INFO L93 Difference]: Finished difference Result 722 states and 1896 transitions. [2021-06-06 00:16:27,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:16:27,272 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 [2021-06-06 00:16:27,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:27,277 INFO L225 Difference]: With dead ends: 722 [2021-06-06 00:16:27,277 INFO L226 Difference]: Without dead ends: 682 [2021-06-06 00:16:27,277 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:16:27,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-06-06 00:16:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 573. [2021-06-06 00:16:27,288 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) [2021-06-06 00:16:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1513 transitions. [2021-06-06 00:16:27,289 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1513 transitions. Word has length 28 [2021-06-06 00:16:27,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:27,289 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1513 transitions. [2021-06-06 00:16:27,289 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) [2021-06-06 00:16:27,289 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1513 transitions. [2021-06-06 00:16:27,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:16:27,291 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:27,291 INFO L554 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] [2021-06-06 00:16:27,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-06 00:16:27,514 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:27,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:27,514 INFO L82 PathProgramCache]: Analyzing trace with hash 663834170, now seen corresponding path program 15 times [2021-06-06 00:16:27,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:27,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75579177] [2021-06-06 00:16:27,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:27,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:27,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75579177] [2021-06-06 00:16:27,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75579177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:27,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193282192] [2021-06-06 00:16:27,604 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 [2021-06-06 00:16:27,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:16:27,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:27,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:16:27,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:27,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193282192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:27,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:27,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-06-06 00:16:27,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196673002] [2021-06-06 00:16:27,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:16:27,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:27,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:16:27,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:16:27,769 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) [2021-06-06 00:16:27,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:27,941 INFO L93 Difference]: Finished difference Result 800 states and 2048 transitions. [2021-06-06 00:16:27,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:16:27,942 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 [2021-06-06 00:16:27,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:27,946 INFO L225 Difference]: With dead ends: 800 [2021-06-06 00:16:27,947 INFO L226 Difference]: Without dead ends: 762 [2021-06-06 00:16:27,947 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:16:27,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-06 00:16:27,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 543. [2021-06-06 00:16:27,959 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) [2021-06-06 00:16:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1434 transitions. [2021-06-06 00:16:27,960 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1434 transitions. Word has length 28 [2021-06-06 00:16:27,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:27,960 INFO L482 AbstractCegarLoop]: Abstraction has 543 states and 1434 transitions. [2021-06-06 00:16:27,960 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) [2021-06-06 00:16:27,960 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1434 transitions. [2021-06-06 00:16:27,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:27,961 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:27,962 INFO L554 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] [2021-06-06 00:16:28,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:28,185 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:28,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:28,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1075166198, now seen corresponding path program 16 times [2021-06-06 00:16:28,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:28,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136892114] [2021-06-06 00:16:28,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:28,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:28,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:28,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136892114] [2021-06-06 00:16:28,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136892114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:28,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350405562] [2021-06-06 00:16:28,227 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 [2021-06-06 00:16:28,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:16:28,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:28,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:28,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:28,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:28,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350405562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:28,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:28,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-06 00:16:28,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756914591] [2021-06-06 00:16:28,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:16:28,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:28,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:16:28,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:16:28,339 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) [2021-06-06 00:16:28,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:28,446 INFO L93 Difference]: Finished difference Result 992 states and 2597 transitions. [2021-06-06 00:16:28,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:16:28,446 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 [2021-06-06 00:16:28,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:28,450 INFO L225 Difference]: With dead ends: 992 [2021-06-06 00:16:28,450 INFO L226 Difference]: Without dead ends: 992 [2021-06-06 00:16:28,451 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:16:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-06-06 00:16:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 587. [2021-06-06 00:16:28,466 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) [2021-06-06 00:16:28,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1561 transitions. [2021-06-06 00:16:28,468 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1561 transitions. Word has length 31 [2021-06-06 00:16:28,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:28,469 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1561 transitions. [2021-06-06 00:16:28,469 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) [2021-06-06 00:16:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1561 transitions. [2021-06-06 00:16:28,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:28,470 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:28,470 INFO L554 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] [2021-06-06 00:16:28,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-06 00:16:28,685 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:28,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:28,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1496697428, now seen corresponding path program 17 times [2021-06-06 00:16:28,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:28,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973421061] [2021-06-06 00:16:28,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:28,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:28,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973421061] [2021-06-06 00:16:28,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973421061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:28,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834368369] [2021-06-06 00:16:28,708 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 [2021-06-06 00:16:28,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:16:28,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:28,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:28,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:28,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834368369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:28,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:28,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-06 00:16:28,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528187319] [2021-06-06 00:16:28,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:16:28,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:28,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:16:28,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:16:28,802 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) [2021-06-06 00:16:28,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:28,873 INFO L93 Difference]: Finished difference Result 1042 states and 2731 transitions. [2021-06-06 00:16:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:16:28,873 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 [2021-06-06 00:16:28,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:28,877 INFO L225 Difference]: With dead ends: 1042 [2021-06-06 00:16:28,877 INFO L226 Difference]: Without dead ends: 997 [2021-06-06 00:16:28,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:16:28,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-06-06 00:16:28,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 587. [2021-06-06 00:16:28,888 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) [2021-06-06 00:16:28,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1554 transitions. [2021-06-06 00:16:28,890 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1554 transitions. Word has length 31 [2021-06-06 00:16:28,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:28,890 INFO L482 AbstractCegarLoop]: Abstraction has 587 states and 1554 transitions. [2021-06-06 00:16:28,890 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) [2021-06-06 00:16:28,890 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1554 transitions. [2021-06-06 00:16:28,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:28,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:28,891 INFO L554 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] [2021-06-06 00:16:29,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-06 00:16:29,114 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:29,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:29,114 INFO L82 PathProgramCache]: Analyzing trace with hash 73958184, now seen corresponding path program 18 times [2021-06-06 00:16:29,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:29,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169382430] [2021-06-06 00:16:29,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:29,151 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:29,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:29,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169382430] [2021-06-06 00:16:29,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169382430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:29,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818638161] [2021-06-06 00:16:29,151 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 [2021-06-06 00:16:29,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:16:29,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:29,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:29,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:29,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818638161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:29,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:29,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:16:29,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854372121] [2021-06-06 00:16:29,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:16:29,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:29,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:16:29,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:29,263 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) [2021-06-06 00:16:29,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:29,510 INFO L93 Difference]: Finished difference Result 2039 states and 5214 transitions. [2021-06-06 00:16:29,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:16:29,510 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 [2021-06-06 00:16:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:29,527 INFO L225 Difference]: With dead ends: 2039 [2021-06-06 00:16:29,527 INFO L226 Difference]: Without dead ends: 2039 [2021-06-06 00:16:29,528 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 165.9ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:16:29,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-06-06 00:16:29,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 884. [2021-06-06 00:16:29,553 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) [2021-06-06 00:16:29,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2440 transitions. [2021-06-06 00:16:29,555 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2440 transitions. Word has length 31 [2021-06-06 00:16:29,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:29,556 INFO L482 AbstractCegarLoop]: Abstraction has 884 states and 2440 transitions. [2021-06-06 00:16:29,556 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) [2021-06-06 00:16:29,556 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2440 transitions. [2021-06-06 00:16:29,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:29,562 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:29,562 INFO L554 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] [2021-06-06 00:16:29,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:29,777 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:29,777 INFO L82 PathProgramCache]: Analyzing trace with hash -136738862, now seen corresponding path program 19 times [2021-06-06 00:16:29,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:29,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640226569] [2021-06-06 00:16:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:29,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:29,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:29,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640226569] [2021-06-06 00:16:29,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640226569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:29,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995784158] [2021-06-06 00:16:29,800 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 [2021-06-06 00:16:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:29,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:29,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:29,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:29,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995784158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:29,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:29,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:16:29,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905305240] [2021-06-06 00:16:29,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:16:29,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:29,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:16:29,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:29,895 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) [2021-06-06 00:16:30,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:30,085 INFO L93 Difference]: Finished difference Result 1980 states and 5236 transitions. [2021-06-06 00:16:30,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:16:30,093 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 [2021-06-06 00:16:30,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:30,098 INFO L225 Difference]: With dead ends: 1980 [2021-06-06 00:16:30,098 INFO L226 Difference]: Without dead ends: 1968 [2021-06-06 00:16:30,099 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:16:30,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-06-06 00:16:30,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1100. [2021-06-06 00:16:30,124 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) [2021-06-06 00:16:30,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 3086 transitions. [2021-06-06 00:16:30,126 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 3086 transitions. Word has length 31 [2021-06-06 00:16:30,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:30,126 INFO L482 AbstractCegarLoop]: Abstraction has 1100 states and 3086 transitions. [2021-06-06 00:16:30,127 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) [2021-06-06 00:16:30,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 3086 transitions. [2021-06-06 00:16:30,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:30,129 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:30,129 INFO L554 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] [2021-06-06 00:16:30,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-06 00:16:30,352 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:30,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:30,353 INFO L82 PathProgramCache]: Analyzing trace with hash 592012956, now seen corresponding path program 20 times [2021-06-06 00:16:30,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:30,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456017984] [2021-06-06 00:16:30,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:30,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:30,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456017984] [2021-06-06 00:16:30,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456017984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:30,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040976396] [2021-06-06 00:16:30,384 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 [2021-06-06 00:16:30,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:30,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:30,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:30,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:30,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040976396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:30,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:30,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:16:30,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144628274] [2021-06-06 00:16:30,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:16:30,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:30,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:16:30,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:30,487 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) [2021-06-06 00:16:30,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:30,737 INFO L93 Difference]: Finished difference Result 2053 states and 5419 transitions. [2021-06-06 00:16:30,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:16:30,737 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 [2021-06-06 00:16:30,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:30,739 INFO L225 Difference]: With dead ends: 2053 [2021-06-06 00:16:30,740 INFO L226 Difference]: Without dead ends: 2053 [2021-06-06 00:16:30,740 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 164.0ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:16:30,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-06-06 00:16:30,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1104. [2021-06-06 00:16:30,762 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) [2021-06-06 00:16:30,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 3096 transitions. [2021-06-06 00:16:30,765 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 3096 transitions. Word has length 31 [2021-06-06 00:16:30,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:30,765 INFO L482 AbstractCegarLoop]: Abstraction has 1104 states and 3096 transitions. [2021-06-06 00:16:30,765 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) [2021-06-06 00:16:30,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 3096 transitions. [2021-06-06 00:16:30,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:30,767 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:30,767 INFO L554 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] [2021-06-06 00:16:30,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:30,985 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:30,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:30,985 INFO L82 PathProgramCache]: Analyzing trace with hash 215041802, now seen corresponding path program 21 times [2021-06-06 00:16:30,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:30,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695559808] [2021-06-06 00:16:30,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:31,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:31,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695559808] [2021-06-06 00:16:31,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695559808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:31,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669235805] [2021-06-06 00:16:31,007 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 [2021-06-06 00:16:31,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:16:31,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:31,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:31,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:31,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669235805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:31,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:31,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:16:31,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366041450] [2021-06-06 00:16:31,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:16:31,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:31,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:16:31,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:31,093 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) [2021-06-06 00:16:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:31,280 INFO L93 Difference]: Finished difference Result 2247 states and 5856 transitions. [2021-06-06 00:16:31,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:16:31,280 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 [2021-06-06 00:16:31,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:31,283 INFO L225 Difference]: With dead ends: 2247 [2021-06-06 00:16:31,283 INFO L226 Difference]: Without dead ends: 2233 [2021-06-06 00:16:31,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:16:31,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2021-06-06 00:16:31,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1111. [2021-06-06 00:16:31,306 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) [2021-06-06 00:16:31,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3099 transitions. [2021-06-06 00:16:31,308 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3099 transitions. Word has length 31 [2021-06-06 00:16:31,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:31,308 INFO L482 AbstractCegarLoop]: Abstraction has 1111 states and 3099 transitions. [2021-06-06 00:16:31,308 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) [2021-06-06 00:16:31,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3099 transitions. [2021-06-06 00:16:31,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:31,310 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:31,311 INFO L554 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] [2021-06-06 00:16:31,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-06 00:16:31,525 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:31,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:31,525 INFO L82 PathProgramCache]: Analyzing trace with hash 299440576, now seen corresponding path program 22 times [2021-06-06 00:16:31,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:31,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270857213] [2021-06-06 00:16:31,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:31,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:31,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:31,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270857213] [2021-06-06 00:16:31,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270857213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:31,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651197299] [2021-06-06 00:16:31,549 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 [2021-06-06 00:16:31,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:16:31,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:31,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:31,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:31,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:31,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651197299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:31,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:31,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:16:31,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137107941] [2021-06-06 00:16:31,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:16:31,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:31,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:16:31,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:31,645 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) [2021-06-06 00:16:31,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:31,773 INFO L93 Difference]: Finished difference Result 1836 states and 4940 transitions. [2021-06-06 00:16:31,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-06 00:16:31,773 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 [2021-06-06 00:16:31,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:31,776 INFO L225 Difference]: With dead ends: 1836 [2021-06-06 00:16:31,776 INFO L226 Difference]: Without dead ends: 1808 [2021-06-06 00:16:31,776 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 99.2ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:16:31,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2021-06-06 00:16:31,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1121. [2021-06-06 00:16:31,794 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) [2021-06-06 00:16:31,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3108 transitions. [2021-06-06 00:16:31,796 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3108 transitions. Word has length 31 [2021-06-06 00:16:31,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:31,797 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 3108 transitions. [2021-06-06 00:16:31,797 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) [2021-06-06 00:16:31,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3108 transitions. [2021-06-06 00:16:31,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:31,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:31,799 INFO L554 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] [2021-06-06 00:16:32,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-06 00:16:32,017 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:32,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:32,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2072647434, now seen corresponding path program 23 times [2021-06-06 00:16:32,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:32,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865430602] [2021-06-06 00:16:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:32,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:32,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865430602] [2021-06-06 00:16:32,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865430602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:32,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360075274] [2021-06-06 00:16:32,059 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 [2021-06-06 00:16:32,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:16:32,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:32,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:32,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:32,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360075274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:32,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:32,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-06 00:16:32,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225505237] [2021-06-06 00:16:32,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:16:32,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:32,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:16:32,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:16:32,215 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) [2021-06-06 00:16:32,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:32,407 INFO L93 Difference]: Finished difference Result 2462 states and 6556 transitions. [2021-06-06 00:16:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:16:32,407 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 [2021-06-06 00:16:32,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:32,411 INFO L225 Difference]: With dead ends: 2462 [2021-06-06 00:16:32,412 INFO L226 Difference]: Without dead ends: 2408 [2021-06-06 00:16:32,412 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:16:32,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-06-06 00:16:32,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 1441. [2021-06-06 00:16:32,442 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) [2021-06-06 00:16:32,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 4062 transitions. [2021-06-06 00:16:32,445 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 4062 transitions. Word has length 31 [2021-06-06 00:16:32,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:32,445 INFO L482 AbstractCegarLoop]: Abstraction has 1441 states and 4062 transitions. [2021-06-06 00:16:32,445 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) [2021-06-06 00:16:32,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 4062 transitions. [2021-06-06 00:16:32,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:32,448 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:32,448 INFO L554 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] [2021-06-06 00:16:32,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-06 00:16:32,670 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:32,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:32,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1805660222, now seen corresponding path program 24 times [2021-06-06 00:16:32,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:32,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231525669] [2021-06-06 00:16:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:32,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:32,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231525669] [2021-06-06 00:16:32,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231525669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:32,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713610543] [2021-06-06 00:16:32,696 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 [2021-06-06 00:16:32,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:16:32,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:32,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:32,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:32,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713610543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:32,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:32,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-06 00:16:32,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080111668] [2021-06-06 00:16:32,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:16:32,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:32,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:16:32,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:32,803 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) [2021-06-06 00:16:33,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:33,004 INFO L93 Difference]: Finished difference Result 2786 states and 7510 transitions. [2021-06-06 00:16:33,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:16:33,005 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 [2021-06-06 00:16:33,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:33,010 INFO L225 Difference]: With dead ends: 2786 [2021-06-06 00:16:33,010 INFO L226 Difference]: Without dead ends: 2786 [2021-06-06 00:16:33,010 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:16:33,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-06-06 00:16:33,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 1845. [2021-06-06 00:16:33,053 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) [2021-06-06 00:16:33,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 5216 transitions. [2021-06-06 00:16:33,058 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 5216 transitions. Word has length 31 [2021-06-06 00:16:33,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:33,058 INFO L482 AbstractCegarLoop]: Abstraction has 1845 states and 5216 transitions. [2021-06-06 00:16:33,058 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) [2021-06-06 00:16:33,058 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 5216 transitions. [2021-06-06 00:16:33,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:33,066 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:33,066 INFO L554 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] [2021-06-06 00:16:33,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:33,281 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:33,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:33,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1164137342, now seen corresponding path program 25 times [2021-06-06 00:16:33,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:33,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309286703] [2021-06-06 00:16:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:33,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:33,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309286703] [2021-06-06 00:16:33,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309286703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:33,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815355398] [2021-06-06 00:16:33,308 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 [2021-06-06 00:16:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:33,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:33,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:33,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:33,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815355398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:33,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:33,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-06 00:16:33,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943939738] [2021-06-06 00:16:33,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:16:33,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:33,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:16:33,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:16:33,378 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) [2021-06-06 00:16:33,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:33,466 INFO L93 Difference]: Finished difference Result 2330 states and 6455 transitions. [2021-06-06 00:16:33,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:16:33,467 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 [2021-06-06 00:16:33,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:33,471 INFO L225 Difference]: With dead ends: 2330 [2021-06-06 00:16:33,471 INFO L226 Difference]: Without dead ends: 2330 [2021-06-06 00:16:33,471 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:16:33,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-06-06 00:16:33,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1887. [2021-06-06 00:16:33,517 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) [2021-06-06 00:16:33,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5337 transitions. [2021-06-06 00:16:33,522 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5337 transitions. Word has length 31 [2021-06-06 00:16:33,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:33,527 INFO L482 AbstractCegarLoop]: Abstraction has 1887 states and 5337 transitions. [2021-06-06 00:16:33,527 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) [2021-06-06 00:16:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5337 transitions. [2021-06-06 00:16:33,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:33,531 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:33,531 INFO L554 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] [2021-06-06 00:16:33,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-06 00:16:33,753 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:33,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:33,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1736902034, now seen corresponding path program 26 times [2021-06-06 00:16:33,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:33,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184530235] [2021-06-06 00:16:33,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:33,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:33,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184530235] [2021-06-06 00:16:33,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184530235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:33,783 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841586128] [2021-06-06 00:16:33,783 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 [2021-06-06 00:16:33,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:33,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:33,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:33,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:33,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841586128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:33,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:33,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-06 00:16:33,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070848492] [2021-06-06 00:16:33,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:16:33,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:33,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:16:33,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:16:33,859 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) [2021-06-06 00:16:33,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:33,928 INFO L93 Difference]: Finished difference Result 2501 states and 6932 transitions. [2021-06-06 00:16:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:16:33,929 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 [2021-06-06 00:16:33,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:33,932 INFO L225 Difference]: With dead ends: 2501 [2021-06-06 00:16:33,932 INFO L226 Difference]: Without dead ends: 2465 [2021-06-06 00:16:33,933 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:16:33,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-06-06 00:16:33,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1887. [2021-06-06 00:16:33,963 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) [2021-06-06 00:16:33,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5331 transitions. [2021-06-06 00:16:33,967 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5331 transitions. Word has length 31 [2021-06-06 00:16:33,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:33,967 INFO L482 AbstractCegarLoop]: Abstraction has 1887 states and 5331 transitions. [2021-06-06 00:16:33,967 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) [2021-06-06 00:16:33,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5331 transitions. [2021-06-06 00:16:33,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:33,971 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:33,971 INFO L554 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] [2021-06-06 00:16:34,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:34,185 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:34,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:34,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1310615324, now seen corresponding path program 27 times [2021-06-06 00:16:34,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:34,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636997399] [2021-06-06 00:16:34,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:34,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:34,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636997399] [2021-06-06 00:16:34,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636997399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:34,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307006845] [2021-06-06 00:16:34,213 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 [2021-06-06 00:16:34,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:16:34,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:34,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:34,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:34,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:34,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307006845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:34,309 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:34,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:16:34,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708131738] [2021-06-06 00:16:34,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:16:34,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:34,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:16:34,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:34,310 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) [2021-06-06 00:16:34,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:34,450 INFO L93 Difference]: Finished difference Result 2490 states and 6843 transitions. [2021-06-06 00:16:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:16:34,450 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 [2021-06-06 00:16:34,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:34,454 INFO L225 Difference]: With dead ends: 2490 [2021-06-06 00:16:34,454 INFO L226 Difference]: Without dead ends: 2490 [2021-06-06 00:16:34,454 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:16:34,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-06-06 00:16:34,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 2067. [2021-06-06 00:16:34,483 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) [2021-06-06 00:16:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 5853 transitions. [2021-06-06 00:16:34,487 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 5853 transitions. Word has length 31 [2021-06-06 00:16:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:34,487 INFO L482 AbstractCegarLoop]: Abstraction has 2067 states and 5853 transitions. [2021-06-06 00:16:34,488 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) [2021-06-06 00:16:34,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 5853 transitions. [2021-06-06 00:16:34,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:34,491 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:34,491 INFO L554 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] [2021-06-06 00:16:34,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-06 00:16:34,698 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:34,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:34,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1055874042, now seen corresponding path program 28 times [2021-06-06 00:16:34,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:34,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779952338] [2021-06-06 00:16:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:34,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:34,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779952338] [2021-06-06 00:16:34,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779952338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:34,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575554113] [2021-06-06 00:16:34,720 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 [2021-06-06 00:16:34,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:16:34,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:34,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:34,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:34,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575554113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:34,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:34,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:16:34,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728175425] [2021-06-06 00:16:34,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:16:34,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:34,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:16:34,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:34,799 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) [2021-06-06 00:16:34,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:34,985 INFO L93 Difference]: Finished difference Result 2862 states and 7833 transitions. [2021-06-06 00:16:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:16:34,986 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 [2021-06-06 00:16:34,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:34,989 INFO L225 Difference]: With dead ends: 2862 [2021-06-06 00:16:34,990 INFO L226 Difference]: Without dead ends: 2838 [2021-06-06 00:16:34,990 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:16:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2021-06-06 00:16:35,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2147. [2021-06-06 00:16:35,027 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) [2021-06-06 00:16:35,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 6085 transitions. [2021-06-06 00:16:35,031 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 6085 transitions. Word has length 31 [2021-06-06 00:16:35,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:35,031 INFO L482 AbstractCegarLoop]: Abstraction has 2147 states and 6085 transitions. [2021-06-06 00:16:35,031 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) [2021-06-06 00:16:35,031 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 6085 transitions. [2021-06-06 00:16:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:35,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:35,035 INFO L554 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] [2021-06-06 00:16:35,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-06 00:16:35,241 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:35,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:35,241 INFO L82 PathProgramCache]: Analyzing trace with hash -276839870, now seen corresponding path program 29 times [2021-06-06 00:16:35,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:35,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499229989] [2021-06-06 00:16:35,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:35,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:35,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499229989] [2021-06-06 00:16:35,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499229989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:35,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422645083] [2021-06-06 00:16:35,265 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 [2021-06-06 00:16:35,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:16:35,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:35,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:35,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:35,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422645083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:35,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:35,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:16:35,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777283603] [2021-06-06 00:16:35,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:16:35,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:35,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:16:35,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:35,373 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) [2021-06-06 00:16:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:35,578 INFO L93 Difference]: Finished difference Result 3330 states and 8999 transitions. [2021-06-06 00:16:35,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:16:35,578 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 [2021-06-06 00:16:35,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:35,582 INFO L225 Difference]: With dead ends: 3330 [2021-06-06 00:16:35,582 INFO L226 Difference]: Without dead ends: 3330 [2021-06-06 00:16:35,582 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:16:35,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2021-06-06 00:16:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2317. [2021-06-06 00:16:35,623 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) [2021-06-06 00:16:35,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 6630 transitions. [2021-06-06 00:16:35,628 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 6630 transitions. Word has length 31 [2021-06-06 00:16:35,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:35,628 INFO L482 AbstractCegarLoop]: Abstraction has 2317 states and 6630 transitions. [2021-06-06 00:16:35,628 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) [2021-06-06 00:16:35,628 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 6630 transitions. [2021-06-06 00:16:35,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:35,633 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:35,633 INFO L554 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] [2021-06-06 00:16:35,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-06 00:16:35,855 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:35,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:35,856 INFO L82 PathProgramCache]: Analyzing trace with hash -487536916, now seen corresponding path program 30 times [2021-06-06 00:16:35,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:35,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411123398] [2021-06-06 00:16:35,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:35,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:35,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411123398] [2021-06-06 00:16:35,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411123398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:35,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896578371] [2021-06-06 00:16:35,879 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 [2021-06-06 00:16:35,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-06 00:16:35,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:35,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:35,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:35,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896578371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:35,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:35,995 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:16:35,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698427714] [2021-06-06 00:16:35,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:16:35,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:35,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:16:35,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:35,996 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) [2021-06-06 00:16:36,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:36,242 INFO L93 Difference]: Finished difference Result 3536 states and 9738 transitions. [2021-06-06 00:16:36,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:16:36,243 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 [2021-06-06 00:16:36,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:36,248 INFO L225 Difference]: With dead ends: 3536 [2021-06-06 00:16:36,248 INFO L226 Difference]: Without dead ends: 3524 [2021-06-06 00:16:36,249 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:16:36,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3524 states. [2021-06-06 00:16:36,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3524 to 2553. [2021-06-06 00:16:36,296 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) [2021-06-06 00:16:36,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 7312 transitions. [2021-06-06 00:16:36,301 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 7312 transitions. Word has length 31 [2021-06-06 00:16:36,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:36,302 INFO L482 AbstractCegarLoop]: Abstraction has 2553 states and 7312 transitions. [2021-06-06 00:16:36,302 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) [2021-06-06 00:16:36,302 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 7312 transitions. [2021-06-06 00:16:36,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:36,306 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:36,306 INFO L554 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] [2021-06-06 00:16:36,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-06 00:16:36,530 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:36,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:36,530 INFO L82 PathProgramCache]: Analyzing trace with hash 241214902, now seen corresponding path program 31 times [2021-06-06 00:16:36,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:36,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206265341] [2021-06-06 00:16:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:36,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:36,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206265341] [2021-06-06 00:16:36,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206265341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:36,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468010351] [2021-06-06 00:16:36,558 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 [2021-06-06 00:16:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:36,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:36,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:36,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468010351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:36,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:36,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:16:36,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956178224] [2021-06-06 00:16:36,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:16:36,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:36,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:16:36,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:36,642 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) [2021-06-06 00:16:36,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:36,871 INFO L93 Difference]: Finished difference Result 3564 states and 9736 transitions. [2021-06-06 00:16:36,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:16:36,872 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 [2021-06-06 00:16:36,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:36,877 INFO L225 Difference]: With dead ends: 3564 [2021-06-06 00:16:36,877 INFO L226 Difference]: Without dead ends: 3564 [2021-06-06 00:16:36,877 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:16:36,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-06-06 00:16:36,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2557. [2021-06-06 00:16:36,928 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) [2021-06-06 00:16:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 7300 transitions. [2021-06-06 00:16:36,934 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 7300 transitions. Word has length 31 [2021-06-06 00:16:36,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:36,935 INFO L482 AbstractCegarLoop]: Abstraction has 2557 states and 7300 transitions. [2021-06-06 00:16:36,935 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) [2021-06-06 00:16:36,935 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 7300 transitions. [2021-06-06 00:16:36,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:36,939 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:36,940 INFO L554 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] [2021-06-06 00:16:37,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-06 00:16:37,153 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:37,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:37,153 INFO L82 PathProgramCache]: Analyzing trace with hash -135756252, now seen corresponding path program 32 times [2021-06-06 00:16:37,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:37,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442605184] [2021-06-06 00:16:37,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:37,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:37,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:37,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442605184] [2021-06-06 00:16:37,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442605184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:37,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551537110] [2021-06-06 00:16:37,175 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 [2021-06-06 00:16:37,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:37,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:37,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:37,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:37,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551537110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:37,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:37,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-06 00:16:37,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924115752] [2021-06-06 00:16:37,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:16:37,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:37,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:16:37,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:37,255 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) [2021-06-06 00:16:37,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:37,461 INFO L93 Difference]: Finished difference Result 3120 states and 8617 transitions. [2021-06-06 00:16:37,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:16:37,462 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 [2021-06-06 00:16:37,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:37,464 INFO L225 Difference]: With dead ends: 3120 [2021-06-06 00:16:37,464 INFO L226 Difference]: Without dead ends: 3106 [2021-06-06 00:16:37,465 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 105.0ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:16:37,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2021-06-06 00:16:37,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 2571. [2021-06-06 00:16:37,496 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) [2021-06-06 00:16:37,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 7324 transitions. [2021-06-06 00:16:37,500 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 7324 transitions. Word has length 31 [2021-06-06 00:16:37,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:37,500 INFO L482 AbstractCegarLoop]: Abstraction has 2571 states and 7324 transitions. [2021-06-06 00:16:37,500 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) [2021-06-06 00:16:37,500 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 7324 transitions. [2021-06-06 00:16:37,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:37,504 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:37,504 INFO L554 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] [2021-06-06 00:16:37,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-06 00:16:37,721 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:37,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:37,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2133092770, now seen corresponding path program 33 times [2021-06-06 00:16:37,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:37,721 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600124138] [2021-06-06 00:16:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:37,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:37,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600124138] [2021-06-06 00:16:37,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600124138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:37,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092620477] [2021-06-06 00:16:37,746 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 [2021-06-06 00:16:37,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:16:37,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:37,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:37,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:37,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092620477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:37,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:37,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-06 00:16:37,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663684143] [2021-06-06 00:16:37,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:16:37,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:37,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:16:37,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:16:37,850 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) [2021-06-06 00:16:38,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:38,065 INFO L93 Difference]: Finished difference Result 3644 states and 10056 transitions. [2021-06-06 00:16:38,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:16:38,066 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 [2021-06-06 00:16:38,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:38,071 INFO L225 Difference]: With dead ends: 3644 [2021-06-06 00:16:38,071 INFO L226 Difference]: Without dead ends: 3644 [2021-06-06 00:16:38,072 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:16:38,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-06-06 00:16:38,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 2693. [2021-06-06 00:16:38,114 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) [2021-06-06 00:16:38,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2693 states to 2693 states and 7663 transitions. [2021-06-06 00:16:38,120 INFO L78 Accepts]: Start accepts. Automaton has 2693 states and 7663 transitions. Word has length 31 [2021-06-06 00:16:38,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:38,120 INFO L482 AbstractCegarLoop]: Abstraction has 2693 states and 7663 transitions. [2021-06-06 00:16:38,120 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) [2021-06-06 00:16:38,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2693 states and 7663 transitions. [2021-06-06 00:16:38,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:38,125 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:38,126 INFO L554 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] [2021-06-06 00:16:38,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-06 00:16:38,349 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:38,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:38,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1233797400, now seen corresponding path program 34 times [2021-06-06 00:16:38,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:38,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100127712] [2021-06-06 00:16:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:38,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:38,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:38,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100127712] [2021-06-06 00:16:38,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100127712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:38,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089582847] [2021-06-06 00:16:38,375 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 [2021-06-06 00:16:38,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:16:38,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:38,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:38,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:38,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089582847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:38,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:38,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-06 00:16:38,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91166010] [2021-06-06 00:16:38,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:16:38,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:38,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:16:38,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:38,466 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) [2021-06-06 00:16:38,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:38,661 INFO L93 Difference]: Finished difference Result 4193 states and 11519 transitions. [2021-06-06 00:16:38,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:16:38,662 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 [2021-06-06 00:16:38,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:38,666 INFO L225 Difference]: With dead ends: 4193 [2021-06-06 00:16:38,666 INFO L226 Difference]: Without dead ends: 4193 [2021-06-06 00:16:38,666 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 134.1ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:16:38,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-06-06 00:16:38,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 3161. [2021-06-06 00:16:38,706 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) [2021-06-06 00:16:38,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 9019 transitions. [2021-06-06 00:16:38,711 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 9019 transitions. Word has length 31 [2021-06-06 00:16:38,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:38,711 INFO L482 AbstractCegarLoop]: Abstraction has 3161 states and 9019 transitions. [2021-06-06 00:16:38,711 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) [2021-06-06 00:16:38,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 9019 transitions. [2021-06-06 00:16:38,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:38,716 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:38,717 INFO L554 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] [2021-06-06 00:16:38,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:38,929 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:38,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1092713782, now seen corresponding path program 35 times [2021-06-06 00:16:38,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:38,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635764809] [2021-06-06 00:16:38,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:16:38,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:38,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635764809] [2021-06-06 00:16:38,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635764809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:38,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72420411] [2021-06-06 00:16:38,971 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 [2021-06-06 00:16:39,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:16:39,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:39,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:39,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:39,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72420411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:39,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:39,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-06-06 00:16:39,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156154919] [2021-06-06 00:16:39,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:16:39,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:39,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:16:39,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:16:39,072 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) [2021-06-06 00:16:39,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:39,292 INFO L93 Difference]: Finished difference Result 4026 states and 11093 transitions. [2021-06-06 00:16:39,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:16:39,293 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 [2021-06-06 00:16:39,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:39,298 INFO L225 Difference]: With dead ends: 4026 [2021-06-06 00:16:39,299 INFO L226 Difference]: Without dead ends: 4012 [2021-06-06 00:16:39,299 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:16:39,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4012 states. [2021-06-06 00:16:39,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4012 to 3057. [2021-06-06 00:16:39,349 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) [2021-06-06 00:16:39,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3057 states to 3057 states and 8681 transitions. [2021-06-06 00:16:39,356 INFO L78 Accepts]: Start accepts. Automaton has 3057 states and 8681 transitions. Word has length 31 [2021-06-06 00:16:39,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:39,356 INFO L482 AbstractCegarLoop]: Abstraction has 3057 states and 8681 transitions. [2021-06-06 00:16:39,356 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) [2021-06-06 00:16:39,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3057 states and 8681 transitions. [2021-06-06 00:16:39,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-06 00:16:39,362 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:39,362 INFO L554 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] [2021-06-06 00:16:39,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:39,579 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:39,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:39,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1008315008, now seen corresponding path program 36 times [2021-06-06 00:16:39,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:39,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603503555] [2021-06-06 00:16:39,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:39,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:39,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:39,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603503555] [2021-06-06 00:16:39,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603503555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:39,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447273976] [2021-06-06 00:16:39,603 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 [2021-06-06 00:16:39,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:16:39,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:39,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:16:39,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:39,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447273976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:39,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:39,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-06 00:16:39,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711676646] [2021-06-06 00:16:39,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:16:39,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:39,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:16:39,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:16:39,692 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) [2021-06-06 00:16:39,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:39,912 INFO L93 Difference]: Finished difference Result 4063 states and 11292 transitions. [2021-06-06 00:16:39,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:16:39,913 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 [2021-06-06 00:16:39,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:39,918 INFO L225 Difference]: With dead ends: 4063 [2021-06-06 00:16:39,919 INFO L226 Difference]: Without dead ends: 4007 [2021-06-06 00:16:39,919 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:16:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-06-06 00:16:39,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3327. [2021-06-06 00:16:39,973 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) [2021-06-06 00:16:39,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 9482 transitions. [2021-06-06 00:16:39,980 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 9482 transitions. Word has length 31 [2021-06-06 00:16:39,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:39,980 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 9482 transitions. [2021-06-06 00:16:39,980 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) [2021-06-06 00:16:39,980 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 9482 transitions. [2021-06-06 00:16:39,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:39,986 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:39,986 INFO L554 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] [2021-06-06 00:16:40,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:40,201 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:40,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:40,201 INFO L82 PathProgramCache]: Analyzing trace with hash 225377440, now seen corresponding path program 37 times [2021-06-06 00:16:40,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:40,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960007071] [2021-06-06 00:16:40,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:40,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:40,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960007071] [2021-06-06 00:16:40,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960007071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:40,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55309186] [2021-06-06 00:16:40,355 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 [2021-06-06 00:16:40,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:40,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:40,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:40,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55309186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:40,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:40,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-06 00:16:40,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634056262] [2021-06-06 00:16:40,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:16:40,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:40,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:16:40,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:16:40,585 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) [2021-06-06 00:16:40,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:40,717 INFO L93 Difference]: Finished difference Result 5088 states and 14550 transitions. [2021-06-06 00:16:40,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:16:40,718 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 [2021-06-06 00:16:40,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:40,723 INFO L225 Difference]: With dead ends: 5088 [2021-06-06 00:16:40,723 INFO L226 Difference]: Without dead ends: 5050 [2021-06-06 00:16:40,724 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 224.7ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:16:40,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2021-06-06 00:16:40,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 3355. [2021-06-06 00:16:40,763 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) [2021-06-06 00:16:40,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 9542 transitions. [2021-06-06 00:16:40,767 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 9542 transitions. Word has length 34 [2021-06-06 00:16:40,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:40,767 INFO L482 AbstractCegarLoop]: Abstraction has 3355 states and 9542 transitions. [2021-06-06 00:16:40,768 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) [2021-06-06 00:16:40,768 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 9542 transitions. [2021-06-06 00:16:40,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:40,772 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:40,772 INFO L554 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] [2021-06-06 00:16:40,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-06 00:16:40,978 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:40,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:40,978 INFO L82 PathProgramCache]: Analyzing trace with hash -236314294, now seen corresponding path program 38 times [2021-06-06 00:16:40,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:40,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785125171] [2021-06-06 00:16:40,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:41,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:41,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785125171] [2021-06-06 00:16:41,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785125171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:41,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648216294] [2021-06-06 00:16:41,098 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 [2021-06-06 00:16:41,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:41,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:41,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:41,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:41,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648216294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:41,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:41,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:16:41,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443372905] [2021-06-06 00:16:41,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:41,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:41,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:41,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:41,314 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) [2021-06-06 00:16:41,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:41,545 INFO L93 Difference]: Finished difference Result 6932 states and 19936 transitions. [2021-06-06 00:16:41,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:16:41,545 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 [2021-06-06 00:16:41,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:41,552 INFO L225 Difference]: With dead ends: 6932 [2021-06-06 00:16:41,552 INFO L226 Difference]: Without dead ends: 6850 [2021-06-06 00:16:41,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 224.7ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:16:41,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6850 states. [2021-06-06 00:16:41,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6850 to 4710. [2021-06-06 00:16:41,632 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) [2021-06-06 00:16:41,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4710 states to 4710 states and 13557 transitions. [2021-06-06 00:16:41,638 INFO L78 Accepts]: Start accepts. Automaton has 4710 states and 13557 transitions. Word has length 34 [2021-06-06 00:16:41,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:41,638 INFO L482 AbstractCegarLoop]: Abstraction has 4710 states and 13557 transitions. [2021-06-06 00:16:41,638 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) [2021-06-06 00:16:41,638 INFO L276 IsEmpty]: Start isEmpty. Operand 4710 states and 13557 transitions. [2021-06-06 00:16:41,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:41,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:41,644 INFO L554 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] [2021-06-06 00:16:41,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:41,849 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:41,849 INFO L82 PathProgramCache]: Analyzing trace with hash 359791622, now seen corresponding path program 39 times [2021-06-06 00:16:41,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:41,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599793599] [2021-06-06 00:16:41,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:41,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:41,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599793599] [2021-06-06 00:16:41,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599793599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:41,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705872137] [2021-06-06 00:16:41,946 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 [2021-06-06 00:16:41,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:16:41,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:41,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:41,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:42,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705872137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:42,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:42,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:16:42,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052143008] [2021-06-06 00:16:42,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:42,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:42,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:42,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:42,153 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) [2021-06-06 00:16:42,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:42,381 INFO L93 Difference]: Finished difference Result 6936 states and 19938 transitions. [2021-06-06 00:16:42,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:16:42,381 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 [2021-06-06 00:16:42,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:42,389 INFO L225 Difference]: With dead ends: 6936 [2021-06-06 00:16:42,390 INFO L226 Difference]: Without dead ends: 6824 [2021-06-06 00:16:42,390 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 221.9ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:16:42,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6824 states. [2021-06-06 00:16:42,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6824 to 4404. [2021-06-06 00:16:42,449 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) [2021-06-06 00:16:42,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4404 states to 4404 states and 12616 transitions. [2021-06-06 00:16:42,456 INFO L78 Accepts]: Start accepts. Automaton has 4404 states and 12616 transitions. Word has length 34 [2021-06-06 00:16:42,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:42,456 INFO L482 AbstractCegarLoop]: Abstraction has 4404 states and 12616 transitions. [2021-06-06 00:16:42,456 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) [2021-06-06 00:16:42,456 INFO L276 IsEmpty]: Start isEmpty. Operand 4404 states and 12616 transitions. [2021-06-06 00:16:42,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:42,462 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:42,462 INFO L554 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] [2021-06-06 00:16:42,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-06-06 00:16:42,662 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:42,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:42,663 INFO L82 PathProgramCache]: Analyzing trace with hash -697731906, now seen corresponding path program 40 times [2021-06-06 00:16:42,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:42,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099523868] [2021-06-06 00:16:42,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:42,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:42,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:42,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099523868] [2021-06-06 00:16:42,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099523868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:42,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497710396] [2021-06-06 00:16:42,776 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 [2021-06-06 00:16:42,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:16:42,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:42,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:42,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:43,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497710396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:43,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:43,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:16:43,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347606484] [2021-06-06 00:16:43,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:43,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:43,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:43,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:43,015 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) [2021-06-06 00:16:43,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:43,211 INFO L93 Difference]: Finished difference Result 6717 states and 19331 transitions. [2021-06-06 00:16:43,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:16:43,211 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 [2021-06-06 00:16:43,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:43,219 INFO L225 Difference]: With dead ends: 6717 [2021-06-06 00:16:43,219 INFO L226 Difference]: Without dead ends: 6641 [2021-06-06 00:16:43,219 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:16:43,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6641 states. [2021-06-06 00:16:43,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6641 to 4682. [2021-06-06 00:16:43,298 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) [2021-06-06 00:16:43,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4682 states to 4682 states and 13447 transitions. [2021-06-06 00:16:43,304 INFO L78 Accepts]: Start accepts. Automaton has 4682 states and 13447 transitions. Word has length 34 [2021-06-06 00:16:43,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:43,304 INFO L482 AbstractCegarLoop]: Abstraction has 4682 states and 13447 transitions. [2021-06-06 00:16:43,305 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) [2021-06-06 00:16:43,305 INFO L276 IsEmpty]: Start isEmpty. Operand 4682 states and 13447 transitions. [2021-06-06 00:16:43,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:43,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:43,309 INFO L554 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] [2021-06-06 00:16:43,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-06 00:16:43,510 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:43,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:43,510 INFO L82 PathProgramCache]: Analyzing trace with hash 480842916, now seen corresponding path program 41 times [2021-06-06 00:16:43,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:43,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976521204] [2021-06-06 00:16:43,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:43,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:43,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:43,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976521204] [2021-06-06 00:16:43,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976521204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:43,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390451897] [2021-06-06 00:16:43,628 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 [2021-06-06 00:16:43,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:16:43,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:43,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:43,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:43,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:43,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390451897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:43,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:43,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:16:43,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540840687] [2021-06-06 00:16:43,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:43,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:43,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:43,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:43,820 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) [2021-06-06 00:16:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:44,008 INFO L93 Difference]: Finished difference Result 6651 states and 19193 transitions. [2021-06-06 00:16:44,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:16:44,008 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 [2021-06-06 00:16:44,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:44,016 INFO L225 Difference]: With dead ends: 6651 [2021-06-06 00:16:44,016 INFO L226 Difference]: Without dead ends: 6613 [2021-06-06 00:16:44,016 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:16:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6613 states. [2021-06-06 00:16:44,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6613 to 4704. [2021-06-06 00:16:44,097 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) [2021-06-06 00:16:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 13512 transitions. [2021-06-06 00:16:44,107 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 13512 transitions. Word has length 34 [2021-06-06 00:16:44,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:44,107 INFO L482 AbstractCegarLoop]: Abstraction has 4704 states and 13512 transitions. [2021-06-06 00:16:44,108 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) [2021-06-06 00:16:44,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 13512 transitions. [2021-06-06 00:16:44,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:44,114 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:44,114 INFO L554 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] [2021-06-06 00:16:44,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:44,319 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:44,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:44,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1249457240, now seen corresponding path program 42 times [2021-06-06 00:16:44,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:44,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469374545] [2021-06-06 00:16:44,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:44,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:44,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469374545] [2021-06-06 00:16:44,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469374545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:44,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578669611] [2021-06-06 00:16:44,455 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 [2021-06-06 00:16:44,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:16:44,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:44,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:16:44,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:44,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578669611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:44,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:44,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-06 00:16:44,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429167347] [2021-06-06 00:16:44,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:16:44,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:44,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:16:44,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:16:44,683 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) [2021-06-06 00:16:45,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:45,054 INFO L93 Difference]: Finished difference Result 7194 states and 20574 transitions. [2021-06-06 00:16:45,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:16:45,054 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 [2021-06-06 00:16:45,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:45,063 INFO L225 Difference]: With dead ends: 7194 [2021-06-06 00:16:45,063 INFO L226 Difference]: Without dead ends: 7092 [2021-06-06 00:16:45,063 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 413.5ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:16:45,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7092 states. [2021-06-06 00:16:45,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7092 to 6468. [2021-06-06 00:16:45,136 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) [2021-06-06 00:16:45,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6468 states to 6468 states and 18760 transitions. [2021-06-06 00:16:45,151 INFO L78 Accepts]: Start accepts. Automaton has 6468 states and 18760 transitions. Word has length 34 [2021-06-06 00:16:45,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:45,151 INFO L482 AbstractCegarLoop]: Abstraction has 6468 states and 18760 transitions. [2021-06-06 00:16:45,151 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) [2021-06-06 00:16:45,152 INFO L276 IsEmpty]: Start isEmpty. Operand 6468 states and 18760 transitions. [2021-06-06 00:16:45,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:45,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:45,161 INFO L554 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] [2021-06-06 00:16:45,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-06 00:16:45,369 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:45,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:45,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1769005992, now seen corresponding path program 43 times [2021-06-06 00:16:45,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:45,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208971268] [2021-06-06 00:16:45,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:45,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:45,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:45,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208971268] [2021-06-06 00:16:45,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208971268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:45,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142478236] [2021-06-06 00:16:45,458 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 [2021-06-06 00:16:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:45,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:45,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:45,651 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:45,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142478236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:45,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:45,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-06 00:16:45,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724547101] [2021-06-06 00:16:45,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:45,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:45,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:45,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:45,653 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) [2021-06-06 00:16:45,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:45,969 INFO L93 Difference]: Finished difference Result 7452 states and 21366 transitions. [2021-06-06 00:16:45,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:16:45,969 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 [2021-06-06 00:16:45,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:45,977 INFO L225 Difference]: With dead ends: 7452 [2021-06-06 00:16:45,977 INFO L226 Difference]: Without dead ends: 7330 [2021-06-06 00:16:45,977 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:16:45,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2021-06-06 00:16:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 5896. [2021-06-06 00:16:46,039 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) [2021-06-06 00:16:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 17044 transitions. [2021-06-06 00:16:46,049 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 17044 transitions. Word has length 34 [2021-06-06 00:16:46,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:46,049 INFO L482 AbstractCegarLoop]: Abstraction has 5896 states and 17044 transitions. [2021-06-06 00:16:46,049 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) [2021-06-06 00:16:46,049 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 17044 transitions. [2021-06-06 00:16:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:46,055 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:46,055 INFO L554 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] [2021-06-06 00:16:46,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:46,265 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:46,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:46,265 INFO L82 PathProgramCache]: Analyzing trace with hash -218400736, now seen corresponding path program 44 times [2021-06-06 00:16:46,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:46,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770933650] [2021-06-06 00:16:46,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:46,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:46,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770933650] [2021-06-06 00:16:46,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770933650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:46,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299820663] [2021-06-06 00:16:46,358 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 [2021-06-06 00:16:46,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:46,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:46,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:46,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:46,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299820663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:46,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:46,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-06 00:16:46,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750737163] [2021-06-06 00:16:46,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:46,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:46,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:46,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:46,553 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) [2021-06-06 00:16:46,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:46,749 INFO L93 Difference]: Finished difference Result 6556 states and 18704 transitions. [2021-06-06 00:16:46,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:16:46,749 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 [2021-06-06 00:16:46,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:46,758 INFO L225 Difference]: With dead ends: 6556 [2021-06-06 00:16:46,758 INFO L226 Difference]: Without dead ends: 6480 [2021-06-06 00:16:46,758 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 182.3ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:16:46,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2021-06-06 00:16:46,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 5562. [2021-06-06 00:16:46,821 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) [2021-06-06 00:16:46,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 16047 transitions. [2021-06-06 00:16:46,830 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 16047 transitions. Word has length 34 [2021-06-06 00:16:46,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:46,830 INFO L482 AbstractCegarLoop]: Abstraction has 5562 states and 16047 transitions. [2021-06-06 00:16:46,831 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) [2021-06-06 00:16:46,831 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 16047 transitions. [2021-06-06 00:16:46,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:46,837 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:46,837 INFO L554 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] [2021-06-06 00:16:47,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-06 00:16:47,037 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:47,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:47,038 INFO L82 PathProgramCache]: Analyzing trace with hash -862511400, now seen corresponding path program 45 times [2021-06-06 00:16:47,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:47,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907244376] [2021-06-06 00:16:47,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:47,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:47,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907244376] [2021-06-06 00:16:47,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907244376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:47,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855976996] [2021-06-06 00:16:47,155 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 [2021-06-06 00:16:47,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:16:47,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:47,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:47,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:47,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855976996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:47,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:47,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:16:47,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001218960] [2021-06-06 00:16:47,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:16:47,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:47,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:16:47,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:16:47,380 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) [2021-06-06 00:16:47,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:47,536 INFO L93 Difference]: Finished difference Result 6381 states and 18213 transitions. [2021-06-06 00:16:47,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:16:47,536 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 [2021-06-06 00:16:47,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:47,544 INFO L225 Difference]: With dead ends: 6381 [2021-06-06 00:16:47,544 INFO L226 Difference]: Without dead ends: 6305 [2021-06-06 00:16:47,544 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:16:47,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2021-06-06 00:16:47,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 5827. [2021-06-06 00:16:47,601 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) [2021-06-06 00:16:47,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5827 states to 5827 states and 16828 transitions. [2021-06-06 00:16:47,610 INFO L78 Accepts]: Start accepts. Automaton has 5827 states and 16828 transitions. Word has length 34 [2021-06-06 00:16:47,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:47,610 INFO L482 AbstractCegarLoop]: Abstraction has 5827 states and 16828 transitions. [2021-06-06 00:16:47,610 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) [2021-06-06 00:16:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 5827 states and 16828 transitions. [2021-06-06 00:16:47,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:47,616 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:47,616 INFO L554 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] [2021-06-06 00:16:47,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:47,818 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:47,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:47,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1403446700, now seen corresponding path program 46 times [2021-06-06 00:16:47,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:47,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981863465] [2021-06-06 00:16:47,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:47,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:47,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:47,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981863465] [2021-06-06 00:16:47,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981863465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:47,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522117466] [2021-06-06 00:16:47,927 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 [2021-06-06 00:16:47,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:16:47,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:47,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:47,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:48,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522117466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:48,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:48,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:16:48,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684547790] [2021-06-06 00:16:48,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:16:48,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:48,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:16:48,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:16:48,128 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) [2021-06-06 00:16:48,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:48,323 INFO L93 Difference]: Finished difference Result 7509 states and 21608 transitions. [2021-06-06 00:16:48,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:16:48,323 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 [2021-06-06 00:16:48,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:48,332 INFO L225 Difference]: With dead ends: 7509 [2021-06-06 00:16:48,333 INFO L226 Difference]: Without dead ends: 7419 [2021-06-06 00:16:48,333 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:16:48,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7419 states. [2021-06-06 00:16:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7419 to 7227. [2021-06-06 00:16:48,456 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) [2021-06-06 00:16:48,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7227 states to 7227 states and 20972 transitions. [2021-06-06 00:16:48,470 INFO L78 Accepts]: Start accepts. Automaton has 7227 states and 20972 transitions. Word has length 34 [2021-06-06 00:16:48,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:48,471 INFO L482 AbstractCegarLoop]: Abstraction has 7227 states and 20972 transitions. [2021-06-06 00:16:48,471 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) [2021-06-06 00:16:48,471 INFO L276 IsEmpty]: Start isEmpty. Operand 7227 states and 20972 transitions. [2021-06-06 00:16:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:48,481 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:48,482 INFO L554 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] [2021-06-06 00:16:48,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:48,695 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:48,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:48,695 INFO L82 PathProgramCache]: Analyzing trace with hash 180516264, now seen corresponding path program 47 times [2021-06-06 00:16:48,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:48,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459242330] [2021-06-06 00:16:48,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:48,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:48,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:48,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459242330] [2021-06-06 00:16:48,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459242330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:48,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247251779] [2021-06-06 00:16:48,773 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 [2021-06-06 00:16:48,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:16:48,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:48,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:48,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:48,980 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:48,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247251779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:48,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:48,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-06 00:16:48,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648043109] [2021-06-06 00:16:48,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:48,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:48,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:48,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:48,982 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) [2021-06-06 00:16:49,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:49,160 INFO L93 Difference]: Finished difference Result 7681 states and 22109 transitions. [2021-06-06 00:16:49,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:16:49,160 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 [2021-06-06 00:16:49,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:49,170 INFO L225 Difference]: With dead ends: 7681 [2021-06-06 00:16:49,170 INFO L226 Difference]: Without dead ends: 7573 [2021-06-06 00:16:49,171 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:16:49,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7573 states. [2021-06-06 00:16:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7573 to 7191. [2021-06-06 00:16:49,259 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) [2021-06-06 00:16:49,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7191 states to 7191 states and 20858 transitions. [2021-06-06 00:16:49,272 INFO L78 Accepts]: Start accepts. Automaton has 7191 states and 20858 transitions. Word has length 34 [2021-06-06 00:16:49,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:49,272 INFO L482 AbstractCegarLoop]: Abstraction has 7191 states and 20858 transitions. [2021-06-06 00:16:49,272 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) [2021-06-06 00:16:49,272 INFO L276 IsEmpty]: Start isEmpty. Operand 7191 states and 20858 transitions. [2021-06-06 00:16:49,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:49,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:49,282 INFO L554 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] [2021-06-06 00:16:49,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-06 00:16:49,497 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:49,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:49,497 INFO L82 PathProgramCache]: Analyzing trace with hash 576311422, now seen corresponding path program 48 times [2021-06-06 00:16:49,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:49,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358207726] [2021-06-06 00:16:49,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:49,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:49,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:49,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358207726] [2021-06-06 00:16:49,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358207726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:49,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959017800] [2021-06-06 00:16:49,577 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 [2021-06-06 00:16:49,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:16:49,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:49,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:49,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:49,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:49,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959017800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:49,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:49,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-06 00:16:49,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516164603] [2021-06-06 00:16:49,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:16:49,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:49,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:16:49,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:16:49,749 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) [2021-06-06 00:16:49,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:49,919 INFO L93 Difference]: Finished difference Result 8299 states and 23923 transitions. [2021-06-06 00:16:49,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:16:49,920 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 [2021-06-06 00:16:49,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:49,930 INFO L225 Difference]: With dead ends: 8299 [2021-06-06 00:16:49,930 INFO L226 Difference]: Without dead ends: 8182 [2021-06-06 00:16:49,930 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:16:49,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8182 states. [2021-06-06 00:16:50,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8182 to 7911. [2021-06-06 00:16:50,059 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) [2021-06-06 00:16:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 23024 transitions. [2021-06-06 00:16:50,073 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 23024 transitions. Word has length 34 [2021-06-06 00:16:50,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:50,073 INFO L482 AbstractCegarLoop]: Abstraction has 7911 states and 23024 transitions. [2021-06-06 00:16:50,073 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) [2021-06-06 00:16:50,073 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 23024 transitions. [2021-06-06 00:16:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:50,082 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:50,082 INFO L554 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] [2021-06-06 00:16:50,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:50,289 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:50,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:50,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1774559878, now seen corresponding path program 49 times [2021-06-06 00:16:50,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:50,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029353311] [2021-06-06 00:16:50,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:16:50,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:50,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029353311] [2021-06-06 00:16:50,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029353311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:50,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139800700] [2021-06-06 00:16:50,376 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 [2021-06-06 00:16:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:50,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:50,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:50,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139800700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:50,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:50,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-06 00:16:50,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199227115] [2021-06-06 00:16:50,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:16:50,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:50,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:16:50,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:16:50,581 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) [2021-06-06 00:16:50,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:50,750 INFO L93 Difference]: Finished difference Result 8695 states and 25141 transitions. [2021-06-06 00:16:50,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:16:50,750 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 [2021-06-06 00:16:50,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:50,761 INFO L225 Difference]: With dead ends: 8695 [2021-06-06 00:16:50,761 INFO L226 Difference]: Without dead ends: 8578 [2021-06-06 00:16:50,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 192.8ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:16:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8578 states. [2021-06-06 00:16:50,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8578 to 8323. [2021-06-06 00:16:50,856 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) [2021-06-06 00:16:50,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8323 states to 8323 states and 24284 transitions. [2021-06-06 00:16:50,871 INFO L78 Accepts]: Start accepts. Automaton has 8323 states and 24284 transitions. Word has length 34 [2021-06-06 00:16:50,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:50,871 INFO L482 AbstractCegarLoop]: Abstraction has 8323 states and 24284 transitions. [2021-06-06 00:16:50,871 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) [2021-06-06 00:16:50,871 INFO L276 IsEmpty]: Start isEmpty. Operand 8323 states and 24284 transitions. [2021-06-06 00:16:50,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:50,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:50,880 INFO L554 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] [2021-06-06 00:16:51,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-06 00:16:51,081 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:51,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:51,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1520972218, now seen corresponding path program 50 times [2021-06-06 00:16:51,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:51,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25990380] [2021-06-06 00:16:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:51,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:51,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:51,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:51,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25990380] [2021-06-06 00:16:51,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25990380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:51,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935061882] [2021-06-06 00:16:51,189 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 [2021-06-06 00:16:51,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:51,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:51,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:51,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:51,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935061882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:51,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:51,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:16:51,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130124568] [2021-06-06 00:16:51,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:16:51,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:51,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:16:51,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:16:51,409 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) [2021-06-06 00:16:51,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:51,677 INFO L93 Difference]: Finished difference Result 8641 states and 24990 transitions. [2021-06-06 00:16:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:16:51,677 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 [2021-06-06 00:16:51,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:51,687 INFO L225 Difference]: With dead ends: 8641 [2021-06-06 00:16:51,687 INFO L226 Difference]: Without dead ends: 8565 [2021-06-06 00:16:51,688 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:16:51,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8565 states. [2021-06-06 00:16:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8565 to 8317. [2021-06-06 00:16:51,776 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) [2021-06-06 00:16:51,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8317 states to 8317 states and 24269 transitions. [2021-06-06 00:16:51,790 INFO L78 Accepts]: Start accepts. Automaton has 8317 states and 24269 transitions. Word has length 34 [2021-06-06 00:16:51,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:51,790 INFO L482 AbstractCegarLoop]: Abstraction has 8317 states and 24269 transitions. [2021-06-06 00:16:51,790 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) [2021-06-06 00:16:51,790 INFO L276 IsEmpty]: Start isEmpty. Operand 8317 states and 24269 transitions. [2021-06-06 00:16:51,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:51,799 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:51,799 INFO L554 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] [2021-06-06 00:16:51,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:52,000 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:52,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:52,000 INFO L82 PathProgramCache]: Analyzing trace with hash -339756294, now seen corresponding path program 51 times [2021-06-06 00:16:52,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:52,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337884719] [2021-06-06 00:16:52,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:52,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:52,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:52,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337884719] [2021-06-06 00:16:52,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337884719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:52,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216944228] [2021-06-06 00:16:52,114 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 [2021-06-06 00:16:52,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:16:52,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:52,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:52,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:52,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216944228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:52,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:52,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-06 00:16:52,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936721661] [2021-06-06 00:16:52,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:16:52,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:52,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:16:52,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:16:52,254 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) [2021-06-06 00:16:52,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:52,404 INFO L93 Difference]: Finished difference Result 12332 states and 36170 transitions. [2021-06-06 00:16:52,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:16:52,405 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 [2021-06-06 00:16:52,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:52,421 INFO L225 Difference]: With dead ends: 12332 [2021-06-06 00:16:52,421 INFO L226 Difference]: Without dead ends: 12295 [2021-06-06 00:16:52,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:16:52,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12295 states. [2021-06-06 00:16:52,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12295 to 8325. [2021-06-06 00:16:52,535 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) [2021-06-06 00:16:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8325 states to 8325 states and 24289 transitions. [2021-06-06 00:16:52,550 INFO L78 Accepts]: Start accepts. Automaton has 8325 states and 24289 transitions. Word has length 34 [2021-06-06 00:16:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:52,550 INFO L482 AbstractCegarLoop]: Abstraction has 8325 states and 24289 transitions. [2021-06-06 00:16:52,550 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) [2021-06-06 00:16:52,550 INFO L276 IsEmpty]: Start isEmpty. Operand 8325 states and 24289 transitions. [2021-06-06 00:16:52,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:52,559 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:52,559 INFO L554 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] [2021-06-06 00:16:52,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:52,760 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:52,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:52,760 INFO L82 PathProgramCache]: Analyzing trace with hash -2051845890, now seen corresponding path program 52 times [2021-06-06 00:16:52,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:52,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026839465] [2021-06-06 00:16:52,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:52,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:52,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026839465] [2021-06-06 00:16:52,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026839465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:52,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028284514] [2021-06-06 00:16:52,870 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 [2021-06-06 00:16:52,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:16:52,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:52,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:52,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:53,078 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:53,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028284514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:53,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:53,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:16:53,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245890574] [2021-06-06 00:16:53,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:53,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:53,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:53,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:53,079 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) [2021-06-06 00:16:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:53,209 INFO L93 Difference]: Finished difference Result 12300 states and 36126 transitions. [2021-06-06 00:16:53,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:16:53,210 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 [2021-06-06 00:16:53,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:53,226 INFO L225 Difference]: With dead ends: 12300 [2021-06-06 00:16:53,226 INFO L226 Difference]: Without dead ends: 12263 [2021-06-06 00:16:53,226 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 171.2ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:16:53,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12263 states. [2021-06-06 00:16:53,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12263 to 8347. [2021-06-06 00:16:53,341 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) [2021-06-06 00:16:53,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8347 states to 8347 states and 24354 transitions. [2021-06-06 00:16:53,355 INFO L78 Accepts]: Start accepts. Automaton has 8347 states and 24354 transitions. Word has length 34 [2021-06-06 00:16:53,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:53,355 INFO L482 AbstractCegarLoop]: Abstraction has 8347 states and 24354 transitions. [2021-06-06 00:16:53,355 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) [2021-06-06 00:16:53,355 INFO L276 IsEmpty]: Start isEmpty. Operand 8347 states and 24354 transitions. [2021-06-06 00:16:53,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:53,365 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:53,365 INFO L554 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] [2021-06-06 00:16:53,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:53,568 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:53,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:53,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1363343686, now seen corresponding path program 53 times [2021-06-06 00:16:53,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:53,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413622892] [2021-06-06 00:16:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:53,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:53,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413622892] [2021-06-06 00:16:53,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413622892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:53,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987200384] [2021-06-06 00:16:53,665 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 [2021-06-06 00:16:53,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:16:53,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:53,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:53,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:53,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:53,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987200384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:53,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:53,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:16:53,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064645749] [2021-06-06 00:16:53,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:53,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:53,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:53,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:53,845 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) [2021-06-06 00:16:54,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:54,078 INFO L93 Difference]: Finished difference Result 12845 states and 37674 transitions. [2021-06-06 00:16:54,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:16:54,078 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 [2021-06-06 00:16:54,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:54,095 INFO L225 Difference]: With dead ends: 12845 [2021-06-06 00:16:54,095 INFO L226 Difference]: Without dead ends: 12771 [2021-06-06 00:16:54,096 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:16:54,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2021-06-06 00:16:54,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 8781. [2021-06-06 00:16:54,258 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) [2021-06-06 00:16:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8781 states to 8781 states and 25635 transitions. [2021-06-06 00:16:54,275 INFO L78 Accepts]: Start accepts. Automaton has 8781 states and 25635 transitions. Word has length 34 [2021-06-06 00:16:54,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:54,275 INFO L482 AbstractCegarLoop]: Abstraction has 8781 states and 25635 transitions. [2021-06-06 00:16:54,275 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) [2021-06-06 00:16:54,275 INFO L276 IsEmpty]: Start isEmpty. Operand 8781 states and 25635 transitions. [2021-06-06 00:16:54,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:54,285 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:54,285 INFO L554 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] [2021-06-06 00:16:54,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:54,489 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:54,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:54,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1176620350, now seen corresponding path program 54 times [2021-06-06 00:16:54,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:54,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229425148] [2021-06-06 00:16:54,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:54,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:54,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229425148] [2021-06-06 00:16:54,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229425148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:54,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984718514] [2021-06-06 00:16:54,603 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 [2021-06-06 00:16:54,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:16:54,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:54,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-06 00:16:54,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:54,786 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:54,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984718514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:54,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:54,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-06-06 00:16:54,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211633796] [2021-06-06 00:16:54,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:16:54,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:54,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:16:54,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:16:54,788 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) [2021-06-06 00:16:55,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:55,423 INFO L93 Difference]: Finished difference Result 14288 states and 41566 transitions. [2021-06-06 00:16:55,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:16:55,423 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 [2021-06-06 00:16:55,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:55,446 INFO L225 Difference]: With dead ends: 14288 [2021-06-06 00:16:55,446 INFO L226 Difference]: Without dead ends: 14180 [2021-06-06 00:16:55,446 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 498.0ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:16:55,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14180 states. [2021-06-06 00:16:55,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14180 to 9669. [2021-06-06 00:16:55,613 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) [2021-06-06 00:16:55,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9669 states to 9669 states and 28321 transitions. [2021-06-06 00:16:55,632 INFO L78 Accepts]: Start accepts. Automaton has 9669 states and 28321 transitions. Word has length 34 [2021-06-06 00:16:55,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:55,632 INFO L482 AbstractCegarLoop]: Abstraction has 9669 states and 28321 transitions. [2021-06-06 00:16:55,632 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) [2021-06-06 00:16:55,632 INFO L276 IsEmpty]: Start isEmpty. Operand 9669 states and 28321 transitions. [2021-06-06 00:16:55,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:55,644 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:55,645 INFO L554 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] [2021-06-06 00:16:55,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-06 00:16:55,857 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:55,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:55,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1063331952, now seen corresponding path program 55 times [2021-06-06 00:16:55,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:55,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925135060] [2021-06-06 00:16:55,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:55,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:55,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925135060] [2021-06-06 00:16:55,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925135060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:55,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487091361] [2021-06-06 00:16:55,981 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 [2021-06-06 00:16:56,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:56,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:56,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:56,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487091361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:56,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:56,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:16:56,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55348584] [2021-06-06 00:16:56,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:16:56,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:56,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:16:56,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:16:56,160 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) [2021-06-06 00:16:56,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:56,358 INFO L93 Difference]: Finished difference Result 10725 states and 31154 transitions. [2021-06-06 00:16:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:16:56,358 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 [2021-06-06 00:16:56,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:56,373 INFO L225 Difference]: With dead ends: 10725 [2021-06-06 00:16:56,373 INFO L226 Difference]: Without dead ends: 10651 [2021-06-06 00:16:56,373 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:16:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10651 states. [2021-06-06 00:16:56,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10651 to 10003. [2021-06-06 00:16:56,501 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) [2021-06-06 00:16:56,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10003 states to 10003 states and 29322 transitions. [2021-06-06 00:16:56,519 INFO L78 Accepts]: Start accepts. Automaton has 10003 states and 29322 transitions. Word has length 34 [2021-06-06 00:16:56,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:56,519 INFO L482 AbstractCegarLoop]: Abstraction has 10003 states and 29322 transitions. [2021-06-06 00:16:56,519 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) [2021-06-06 00:16:56,519 INFO L276 IsEmpty]: Start isEmpty. Operand 10003 states and 29322 transitions. [2021-06-06 00:16:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:56,531 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:56,531 INFO L554 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] [2021-06-06 00:16:56,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:56,731 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:56,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:56,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1983656864, now seen corresponding path program 56 times [2021-06-06 00:16:56,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:56,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79239900] [2021-06-06 00:16:56,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:56,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:56,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:56,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:56,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79239900] [2021-06-06 00:16:56,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79239900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:56,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541684673] [2021-06-06 00:16:56,812 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 [2021-06-06 00:16:56,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:16:56,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:56,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:56,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:56,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541684673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:56,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:56,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-06 00:16:56,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864067509] [2021-06-06 00:16:56,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:56,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:56,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:56,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:56,980 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) [2021-06-06 00:16:57,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:57,160 INFO L93 Difference]: Finished difference Result 10805 states and 31382 transitions. [2021-06-06 00:16:57,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:16:57,161 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 [2021-06-06 00:16:57,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:57,176 INFO L225 Difference]: With dead ends: 10805 [2021-06-06 00:16:57,176 INFO L226 Difference]: Without dead ends: 10731 [2021-06-06 00:16:57,176 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:16:57,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10731 states. [2021-06-06 00:16:57,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10731 to 9581. [2021-06-06 00:16:57,308 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) [2021-06-06 00:16:57,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9581 states to 9581 states and 28075 transitions. [2021-06-06 00:16:57,326 INFO L78 Accepts]: Start accepts. Automaton has 9581 states and 28075 transitions. Word has length 34 [2021-06-06 00:16:57,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:57,326 INFO L482 AbstractCegarLoop]: Abstraction has 9581 states and 28075 transitions. [2021-06-06 00:16:57,327 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) [2021-06-06 00:16:57,327 INFO L276 IsEmpty]: Start isEmpty. Operand 9581 states and 28075 transitions. [2021-06-06 00:16:57,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:57,338 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:57,339 INFO L554 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] [2021-06-06 00:16:57,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:57,541 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:57,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:57,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1691006202, now seen corresponding path program 57 times [2021-06-06 00:16:57,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:57,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240276358] [2021-06-06 00:16:57,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:57,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:57,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240276358] [2021-06-06 00:16:57,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240276358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:57,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170228186] [2021-06-06 00:16:57,625 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 [2021-06-06 00:16:57,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:16:57,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:57,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:57,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:57,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170228186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:57,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:57,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-06 00:16:57,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755531859] [2021-06-06 00:16:57,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:57,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:57,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:57,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:57,800 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) [2021-06-06 00:16:58,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:58,077 INFO L93 Difference]: Finished difference Result 11489 states and 33477 transitions. [2021-06-06 00:16:58,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:16:58,077 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 [2021-06-06 00:16:58,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:58,091 INFO L225 Difference]: With dead ends: 11489 [2021-06-06 00:16:58,091 INFO L226 Difference]: Without dead ends: 11399 [2021-06-06 00:16:58,091 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:16:58,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11399 states. [2021-06-06 00:16:58,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11399 to 10345. [2021-06-06 00:16:58,211 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) [2021-06-06 00:16:58,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10345 states to 10345 states and 30401 transitions. [2021-06-06 00:16:58,229 INFO L78 Accepts]: Start accepts. Automaton has 10345 states and 30401 transitions. Word has length 34 [2021-06-06 00:16:58,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:58,229 INFO L482 AbstractCegarLoop]: Abstraction has 10345 states and 30401 transitions. [2021-06-06 00:16:58,229 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) [2021-06-06 00:16:58,229 INFO L276 IsEmpty]: Start isEmpty. Operand 10345 states and 30401 transitions. [2021-06-06 00:16:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:58,240 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:58,240 INFO L554 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] [2021-06-06 00:16:58,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:16:58,441 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:58,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:58,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1810089214, now seen corresponding path program 58 times [2021-06-06 00:16:58,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:58,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015577107] [2021-06-06 00:16:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:16:58,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:58,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015577107] [2021-06-06 00:16:58,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015577107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:58,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140224491] [2021-06-06 00:16:58,538 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 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 [2021-06-06 00:16:58,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:16:58,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:58,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:58,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:58,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140224491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:58,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:58,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-06 00:16:58,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386224786] [2021-06-06 00:16:58,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:16:58,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:58,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:16:58,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:16:58,746 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) [2021-06-06 00:16:58,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:16:58,976 INFO L93 Difference]: Finished difference Result 11481 states and 33447 transitions. [2021-06-06 00:16:58,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:16:58,976 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 [2021-06-06 00:16:58,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:16:58,992 INFO L225 Difference]: With dead ends: 11481 [2021-06-06 00:16:58,992 INFO L226 Difference]: Without dead ends: 11365 [2021-06-06 00:16:58,993 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:16:59,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11365 states. [2021-06-06 00:16:59,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11365 to 10339. [2021-06-06 00:16:59,129 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) [2021-06-06 00:16:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10339 states to 10339 states and 30360 transitions. [2021-06-06 00:16:59,149 INFO L78 Accepts]: Start accepts. Automaton has 10339 states and 30360 transitions. Word has length 34 [2021-06-06 00:16:59,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:16:59,149 INFO L482 AbstractCegarLoop]: Abstraction has 10339 states and 30360 transitions. [2021-06-06 00:16:59,150 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) [2021-06-06 00:16:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 10339 states and 30360 transitions. [2021-06-06 00:16:59,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:16:59,162 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:16:59,162 INFO L554 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] [2021-06-06 00:16:59,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-06 00:16:59,363 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:16:59,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:16:59,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1665801632, now seen corresponding path program 59 times [2021-06-06 00:16:59,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:16:59,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315331514] [2021-06-06 00:16:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:16:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:16:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:59,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:16:59,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315331514] [2021-06-06 00:16:59,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315331514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:59,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467965712] [2021-06-06 00:16:59,465 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 [2021-06-06 00:16:59,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:16:59,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:16:59,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:16:59,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:16:59,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:16:59,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467965712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:16:59,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:16:59,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:16:59,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854707178] [2021-06-06 00:16:59,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:16:59,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:16:59,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:16:59,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:16:59,682 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) [2021-06-06 00:17:00,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:00,003 INFO L93 Difference]: Finished difference Result 11183 states and 32491 transitions. [2021-06-06 00:17:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:17:00,003 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 [2021-06-06 00:17:00,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:00,018 INFO L225 Difference]: With dead ends: 11183 [2021-06-06 00:17:00,018 INFO L226 Difference]: Without dead ends: 11066 [2021-06-06 00:17:00,018 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:17:00,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11066 states. [2021-06-06 00:17:00,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11066 to 9849. [2021-06-06 00:17:00,145 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) [2021-06-06 00:17:00,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9849 states to 9849 states and 28889 transitions. [2021-06-06 00:17:00,162 INFO L78 Accepts]: Start accepts. Automaton has 9849 states and 28889 transitions. Word has length 34 [2021-06-06 00:17:00,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:00,162 INFO L482 AbstractCegarLoop]: Abstraction has 9849 states and 28889 transitions. [2021-06-06 00:17:00,162 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) [2021-06-06 00:17:00,162 INFO L276 IsEmpty]: Start isEmpty. Operand 9849 states and 28889 transitions. [2021-06-06 00:17:00,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:17:00,173 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:00,173 INFO L554 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] [2021-06-06 00:17:00,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:00,374 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:00,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:00,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1957855712, now seen corresponding path program 60 times [2021-06-06 00:17:00,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:00,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587261936] [2021-06-06 00:17:00,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:00,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:00,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587261936] [2021-06-06 00:17:00,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587261936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:00,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383739336] [2021-06-06 00:17:00,473 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 [2021-06-06 00:17:00,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:17:00,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:00,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:17:00,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:00,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383739336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:00,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:00,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:17:00,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347757850] [2021-06-06 00:17:00,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:17:00,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:00,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:17:00,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:17:00,650 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) [2021-06-06 00:17:00,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:00,891 INFO L93 Difference]: Finished difference Result 11201 states and 32696 transitions. [2021-06-06 00:17:00,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:17:00,892 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 [2021-06-06 00:17:00,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:00,907 INFO L225 Difference]: With dead ends: 11201 [2021-06-06 00:17:00,907 INFO L226 Difference]: Without dead ends: 11107 [2021-06-06 00:17:00,907 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 215.6ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:17:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11107 states. [2021-06-06 00:17:01,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11107 to 10839. [2021-06-06 00:17:01,050 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) [2021-06-06 00:17:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10839 states to 10839 states and 31874 transitions. [2021-06-06 00:17:01,071 INFO L78 Accepts]: Start accepts. Automaton has 10839 states and 31874 transitions. Word has length 34 [2021-06-06 00:17:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:01,071 INFO L482 AbstractCegarLoop]: Abstraction has 10839 states and 31874 transitions. [2021-06-06 00:17:01,072 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) [2021-06-06 00:17:01,072 INFO L276 IsEmpty]: Start isEmpty. Operand 10839 states and 31874 transitions. [2021-06-06 00:17:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:17:01,084 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:01,085 INFO L554 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] [2021-06-06 00:17:01,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-06 00:17:01,285 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:01,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:01,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1517139066, now seen corresponding path program 61 times [2021-06-06 00:17:01,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:01,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976144565] [2021-06-06 00:17:01,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:01,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:01,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:01,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976144565] [2021-06-06 00:17:01,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976144565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:01,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080336678] [2021-06-06 00:17:01,372 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 [2021-06-06 00:17:01,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:01,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:17:01,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:01,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080336678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:01,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:01,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-06 00:17:01,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163266289] [2021-06-06 00:17:01,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:17:01,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:01,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:17:01,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:17:01,597 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) [2021-06-06 00:17:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:01,926 INFO L93 Difference]: Finished difference Result 11645 states and 34056 transitions. [2021-06-06 00:17:01,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:17:01,927 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 [2021-06-06 00:17:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:01,943 INFO L225 Difference]: With dead ends: 11645 [2021-06-06 00:17:01,943 INFO L226 Difference]: Without dead ends: 11537 [2021-06-06 00:17:01,943 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:17:01,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11537 states. [2021-06-06 00:17:02,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11537 to 10493. [2021-06-06 00:17:02,105 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) [2021-06-06 00:17:02,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10493 states to 10493 states and 30847 transitions. [2021-06-06 00:17:02,129 INFO L78 Accepts]: Start accepts. Automaton has 10493 states and 30847 transitions. Word has length 34 [2021-06-06 00:17:02,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:02,129 INFO L482 AbstractCegarLoop]: Abstraction has 10493 states and 30847 transitions. [2021-06-06 00:17:02,129 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) [2021-06-06 00:17:02,129 INFO L276 IsEmpty]: Start isEmpty. Operand 10493 states and 30847 transitions. [2021-06-06 00:17:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:17:02,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:02,140 INFO L554 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] [2021-06-06 00:17:02,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-06 00:17:02,341 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:02,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:02,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1039269088, now seen corresponding path program 62 times [2021-06-06 00:17:02,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:02,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183041222] [2021-06-06 00:17:02,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:02,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:02,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:02,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183041222] [2021-06-06 00:17:02,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183041222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:02,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677978115] [2021-06-06 00:17:02,420 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 [2021-06-06 00:17:02,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:17:02,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:02,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:17:02,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:02,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677978115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:02,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:02,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-06 00:17:02,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631151462] [2021-06-06 00:17:02,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:17:02,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:02,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:17:02,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:17:02,594 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) [2021-06-06 00:17:02,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:02,751 INFO L93 Difference]: Finished difference Result 12117 states and 35549 transitions. [2021-06-06 00:17:02,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:17:02,751 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 [2021-06-06 00:17:02,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:02,767 INFO L225 Difference]: With dead ends: 12117 [2021-06-06 00:17:02,767 INFO L226 Difference]: Without dead ends: 12035 [2021-06-06 00:17:02,768 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:17:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12035 states. [2021-06-06 00:17:02,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12035 to 11671. [2021-06-06 00:17:02,896 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) [2021-06-06 00:17:02,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11671 states to 11671 states and 34414 transitions. [2021-06-06 00:17:02,917 INFO L78 Accepts]: Start accepts. Automaton has 11671 states and 34414 transitions. Word has length 34 [2021-06-06 00:17:02,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:02,917 INFO L482 AbstractCegarLoop]: Abstraction has 11671 states and 34414 transitions. [2021-06-06 00:17:02,917 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) [2021-06-06 00:17:02,917 INFO L276 IsEmpty]: Start isEmpty. Operand 11671 states and 34414 transitions. [2021-06-06 00:17:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:17:02,930 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:02,930 INFO L554 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] [2021-06-06 00:17:03,131 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-06 00:17:03,131 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:03,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:03,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1158352100, now seen corresponding path program 63 times [2021-06-06 00:17:03,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:03,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239303779] [2021-06-06 00:17:03,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:17:03,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:03,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239303779] [2021-06-06 00:17:03,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239303779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:03,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069197932] [2021-06-06 00:17:03,209 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 [2021-06-06 00:17:03,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-06 00:17:03,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:03,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:17:03,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:03,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069197932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:03,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:03,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-06 00:17:03,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862653533] [2021-06-06 00:17:03,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:17:03,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:03,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:17:03,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:17:03,393 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) [2021-06-06 00:17:03,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:03,582 INFO L93 Difference]: Finished difference Result 12114 states and 35537 transitions. [2021-06-06 00:17:03,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:17:03,583 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 [2021-06-06 00:17:03,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:03,599 INFO L225 Difference]: With dead ends: 12114 [2021-06-06 00:17:03,599 INFO L226 Difference]: Without dead ends: 12002 [2021-06-06 00:17:03,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:17:03,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2021-06-06 00:17:03,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 11231. [2021-06-06 00:17:03,758 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) [2021-06-06 00:17:03,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11231 states to 11231 states and 33060 transitions. [2021-06-06 00:17:03,776 INFO L78 Accepts]: Start accepts. Automaton has 11231 states and 33060 transitions. Word has length 34 [2021-06-06 00:17:03,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:03,776 INFO L482 AbstractCegarLoop]: Abstraction has 11231 states and 33060 transitions. [2021-06-06 00:17:03,776 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) [2021-06-06 00:17:03,776 INFO L276 IsEmpty]: Start isEmpty. Operand 11231 states and 33060 transitions. [2021-06-06 00:17:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:17:03,787 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:03,788 INFO L554 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] [2021-06-06 00:17:03,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:03,989 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:03,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:03,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1014064518, now seen corresponding path program 64 times [2021-06-06 00:17:03,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:03,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496298005] [2021-06-06 00:17:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:17:04,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:04,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496298005] [2021-06-06 00:17:04,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496298005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:04,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986968757] [2021-06-06 00:17:04,106 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 [2021-06-06 00:17:04,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:17:04,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:04,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:17:04,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:04,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986968757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:04,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:04,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-06 00:17:04,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176239437] [2021-06-06 00:17:04,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:17:04,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:04,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:17:04,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:17:04,283 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) [2021-06-06 00:17:04,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:04,517 INFO L93 Difference]: Finished difference Result 12011 states and 35167 transitions. [2021-06-06 00:17:04,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:17:04,517 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 [2021-06-06 00:17:04,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:04,533 INFO L225 Difference]: With dead ends: 12011 [2021-06-06 00:17:04,533 INFO L226 Difference]: Without dead ends: 11894 [2021-06-06 00:17:04,533 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:17:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11894 states. [2021-06-06 00:17:04,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11894 to 11643. [2021-06-06 00:17:04,676 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) [2021-06-06 00:17:04,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11643 states to 11643 states and 34320 transitions. [2021-06-06 00:17:04,699 INFO L78 Accepts]: Start accepts. Automaton has 11643 states and 34320 transitions. Word has length 34 [2021-06-06 00:17:04,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:04,699 INFO L482 AbstractCegarLoop]: Abstraction has 11643 states and 34320 transitions. [2021-06-06 00:17:04,699 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) [2021-06-06 00:17:04,699 INFO L276 IsEmpty]: Start isEmpty. Operand 11643 states and 34320 transitions. [2021-06-06 00:17:04,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-06 00:17:04,713 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:04,713 INFO L554 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] [2021-06-06 00:17:04,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:04,926 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:04,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:04,926 INFO L82 PathProgramCache]: Analyzing trace with hash -14629318, now seen corresponding path program 65 times [2021-06-06 00:17:04,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:04,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064692696] [2021-06-06 00:17:04,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:05,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:05,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064692696] [2021-06-06 00:17:05,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064692696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:05,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324741035] [2021-06-06 00:17:05,028 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 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 [2021-06-06 00:17:05,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:17:05,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:05,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-06 00:17:05,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:05,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324741035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:05,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:05,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:17:05,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663944177] [2021-06-06 00:17:05,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:17:05,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:05,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:17:05,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:17:05,240 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) [2021-06-06 00:17:05,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:05,494 INFO L93 Difference]: Finished difference Result 11957 states and 35016 transitions. [2021-06-06 00:17:05,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-06 00:17:05,494 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 [2021-06-06 00:17:05,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:05,516 INFO L225 Difference]: With dead ends: 11957 [2021-06-06 00:17:05,516 INFO L226 Difference]: Without dead ends: 11881 [2021-06-06 00:17:05,516 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:17:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11881 states. [2021-06-06 00:17:05,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11881 to 10363. [2021-06-06 00:17:05,736 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) [2021-06-06 00:17:05,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 30520 transitions. [2021-06-06 00:17:05,755 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 30520 transitions. Word has length 34 [2021-06-06 00:17:05,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:05,755 INFO L482 AbstractCegarLoop]: Abstraction has 10363 states and 30520 transitions. [2021-06-06 00:17:05,755 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) [2021-06-06 00:17:05,755 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 30520 transitions. [2021-06-06 00:17:05,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:05,768 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:05,768 INFO L554 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] [2021-06-06 00:17:05,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:05,968 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:05,969 INFO L82 PathProgramCache]: Analyzing trace with hash -826580692, now seen corresponding path program 66 times [2021-06-06 00:17:05,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:05,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013373339] [2021-06-06 00:17:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:06,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:06,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013373339] [2021-06-06 00:17:06,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013373339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:06,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741029905] [2021-06-06 00:17:06,002 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 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 [2021-06-06 00:17:06,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:17:06,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:06,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:06,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:06,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741029905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:06,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:06,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:17:06,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774173479] [2021-06-06 00:17:06,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:17:06,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:06,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:17:06,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:17:06,108 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) [2021-06-06 00:17:06,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:06,285 INFO L93 Difference]: Finished difference Result 14684 states and 43273 transitions. [2021-06-06 00:17:06,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:17:06,286 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 [2021-06-06 00:17:06,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:06,311 INFO L225 Difference]: With dead ends: 14684 [2021-06-06 00:17:06,311 INFO L226 Difference]: Without dead ends: 14684 [2021-06-06 00:17:06,311 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:17:06,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14684 states. [2021-06-06 00:17:06,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14684 to 10709. [2021-06-06 00:17:06,472 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) [2021-06-06 00:17:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10709 states to 10709 states and 31502 transitions. [2021-06-06 00:17:06,493 INFO L78 Accepts]: Start accepts. Automaton has 10709 states and 31502 transitions. Word has length 37 [2021-06-06 00:17:06,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:06,493 INFO L482 AbstractCegarLoop]: Abstraction has 10709 states and 31502 transitions. [2021-06-06 00:17:06,493 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) [2021-06-06 00:17:06,493 INFO L276 IsEmpty]: Start isEmpty. Operand 10709 states and 31502 transitions. [2021-06-06 00:17:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:06,506 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:06,506 INFO L554 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] [2021-06-06 00:17:06,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-06 00:17:06,707 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:06,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:06,707 INFO L82 PathProgramCache]: Analyzing trace with hash -179080118, now seen corresponding path program 67 times [2021-06-06 00:17:06,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:06,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264651736] [2021-06-06 00:17:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:06,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:06,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264651736] [2021-06-06 00:17:06,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264651736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:06,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523607933] [2021-06-06 00:17:06,735 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 [2021-06-06 00:17:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:06,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:06,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:06,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:06,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523607933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:06,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:06,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:17:06,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462064368] [2021-06-06 00:17:06,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:17:06,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:06,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:17:06,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:17:06,841 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) [2021-06-06 00:17:07,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:07,010 INFO L93 Difference]: Finished difference Result 17639 states and 51455 transitions. [2021-06-06 00:17:07,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:17:07,010 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 [2021-06-06 00:17:07,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:07,045 INFO L225 Difference]: With dead ends: 17639 [2021-06-06 00:17:07,045 INFO L226 Difference]: Without dead ends: 17573 [2021-06-06 00:17:07,045 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:17:07,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17573 states. [2021-06-06 00:17:07,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17573 to 10709. [2021-06-06 00:17:07,265 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) [2021-06-06 00:17:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10709 states to 10709 states and 31493 transitions. [2021-06-06 00:17:07,288 INFO L78 Accepts]: Start accepts. Automaton has 10709 states and 31493 transitions. Word has length 37 [2021-06-06 00:17:07,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:07,288 INFO L482 AbstractCegarLoop]: Abstraction has 10709 states and 31493 transitions. [2021-06-06 00:17:07,288 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) [2021-06-06 00:17:07,288 INFO L276 IsEmpty]: Start isEmpty. Operand 10709 states and 31493 transitions. [2021-06-06 00:17:07,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:07,302 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:07,302 INFO L554 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] [2021-06-06 00:17:07,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-06 00:17:07,503 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:07,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:07,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1381181770, now seen corresponding path program 68 times [2021-06-06 00:17:07,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:07,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026504885] [2021-06-06 00:17:07,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:07,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:07,539 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:07,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:07,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026504885] [2021-06-06 00:17:07,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026504885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:07,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594234883] [2021-06-06 00:17:07,539 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 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 [2021-06-06 00:17:07,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:17:07,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:07,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:07,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:07,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594234883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:07,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:07,647 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:07,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819570052] [2021-06-06 00:17:07,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:07,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:07,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:07,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:07,648 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) [2021-06-06 00:17:08,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:08,137 INFO L93 Difference]: Finished difference Result 22210 states and 64100 transitions. [2021-06-06 00:17:08,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:17:08,138 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 [2021-06-06 00:17:08,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:08,170 INFO L225 Difference]: With dead ends: 22210 [2021-06-06 00:17:08,170 INFO L226 Difference]: Without dead ends: 22204 [2021-06-06 00:17:08,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 329.4ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:17:08,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22204 states. [2021-06-06 00:17:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22204 to 14316. [2021-06-06 00:17:08,456 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) [2021-06-06 00:17:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14316 states to 14316 states and 42350 transitions. [2021-06-06 00:17:08,484 INFO L78 Accepts]: Start accepts. Automaton has 14316 states and 42350 transitions. Word has length 37 [2021-06-06 00:17:08,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:08,484 INFO L482 AbstractCegarLoop]: Abstraction has 14316 states and 42350 transitions. [2021-06-06 00:17:08,484 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) [2021-06-06 00:17:08,484 INFO L276 IsEmpty]: Start isEmpty. Operand 14316 states and 42350 transitions. [2021-06-06 00:17:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:08,503 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:08,503 INFO L554 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] [2021-06-06 00:17:08,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-06-06 00:17:08,704 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:08,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:08,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1170484724, now seen corresponding path program 69 times [2021-06-06 00:17:08,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:08,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527219706] [2021-06-06 00:17:08,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:08,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:08,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527219706] [2021-06-06 00:17:08,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527219706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:08,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84343987] [2021-06-06 00:17:08,738 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 [2021-06-06 00:17:08,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:17:08,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:08,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:08,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:08,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84343987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:08,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:08,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:08,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407818348] [2021-06-06 00:17:08,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:08,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:08,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:08,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:08,837 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) [2021-06-06 00:17:09,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:09,211 INFO L93 Difference]: Finished difference Result 18669 states and 54267 transitions. [2021-06-06 00:17:09,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:17:09,212 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 [2021-06-06 00:17:09,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:09,239 INFO L225 Difference]: With dead ends: 18669 [2021-06-06 00:17:09,239 INFO L226 Difference]: Without dead ends: 18657 [2021-06-06 00:17:09,239 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 202.5ms TimeCoverageRelationStatistics Valid=417, Invalid=773, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:17:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18657 states. [2021-06-06 00:17:09,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18657 to 15376. [2021-06-06 00:17:09,554 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) [2021-06-06 00:17:09,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15376 states to 15376 states and 45616 transitions. [2021-06-06 00:17:09,587 INFO L78 Accepts]: Start accepts. Automaton has 15376 states and 45616 transitions. Word has length 37 [2021-06-06 00:17:09,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:09,587 INFO L482 AbstractCegarLoop]: Abstraction has 15376 states and 45616 transitions. [2021-06-06 00:17:09,587 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) [2021-06-06 00:17:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 15376 states and 45616 transitions. [2021-06-06 00:17:09,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:09,606 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:09,607 INFO L554 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] [2021-06-06 00:17:09,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:09,807 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:09,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:09,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1899236542, now seen corresponding path program 70 times [2021-06-06 00:17:09,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:09,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778591094] [2021-06-06 00:17:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:09,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:09,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778591094] [2021-06-06 00:17:09,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778591094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:09,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609300156] [2021-06-06 00:17:09,839 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 [2021-06-06 00:17:09,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:17:09,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:09,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:09,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:09,941 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:09,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609300156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:09,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:09,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:09,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322926692] [2021-06-06 00:17:09,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:09,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:09,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:09,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:09,944 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) [2021-06-06 00:17:10,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:10,432 INFO L93 Difference]: Finished difference Result 19128 states and 55390 transitions. [2021-06-06 00:17:10,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:17:10,432 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 [2021-06-06 00:17:10,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:10,457 INFO L225 Difference]: With dead ends: 19128 [2021-06-06 00:17:10,457 INFO L226 Difference]: Without dead ends: 19128 [2021-06-06 00:17:10,458 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 285.2ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:17:10,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19128 states. [2021-06-06 00:17:10,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19128 to 13924. [2021-06-06 00:17:10,679 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) [2021-06-06 00:17:10,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13924 states to 13924 states and 41208 transitions. [2021-06-06 00:17:10,706 INFO L78 Accepts]: Start accepts. Automaton has 13924 states and 41208 transitions. Word has length 37 [2021-06-06 00:17:10,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:10,706 INFO L482 AbstractCegarLoop]: Abstraction has 13924 states and 41208 transitions. [2021-06-06 00:17:10,706 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) [2021-06-06 00:17:10,706 INFO L276 IsEmpty]: Start isEmpty. Operand 13924 states and 41208 transitions. [2021-06-06 00:17:10,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:10,723 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:10,723 INFO L554 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] [2021-06-06 00:17:10,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-06 00:17:10,924 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:10,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:10,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1522265388, now seen corresponding path program 71 times [2021-06-06 00:17:10,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:10,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620203941] [2021-06-06 00:17:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:10,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:10,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620203941] [2021-06-06 00:17:10,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620203941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:10,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662377939] [2021-06-06 00:17:10,951 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 [2021-06-06 00:17:10,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:17:10,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:10,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:10,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:11,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:11,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662377939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:11,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:11,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:11,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909030585] [2021-06-06 00:17:11,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:11,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:11,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:11,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:11,080 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) [2021-06-06 00:17:11,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:11,436 INFO L93 Difference]: Finished difference Result 21416 states and 61999 transitions. [2021-06-06 00:17:11,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:17:11,436 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 [2021-06-06 00:17:11,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:11,463 INFO L225 Difference]: With dead ends: 21416 [2021-06-06 00:17:11,463 INFO L226 Difference]: Without dead ends: 21402 [2021-06-06 00:17:11,463 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 204.1ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:17:11,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21402 states. [2021-06-06 00:17:11,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21402 to 12522. [2021-06-06 00:17:11,736 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) [2021-06-06 00:17:11,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12522 states to 12522 states and 36901 transitions. [2021-06-06 00:17:11,760 INFO L78 Accepts]: Start accepts. Automaton has 12522 states and 36901 transitions. Word has length 37 [2021-06-06 00:17:11,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:11,760 INFO L482 AbstractCegarLoop]: Abstraction has 12522 states and 36901 transitions. [2021-06-06 00:17:11,760 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) [2021-06-06 00:17:11,760 INFO L276 IsEmpty]: Start isEmpty. Operand 12522 states and 36901 transitions. [2021-06-06 00:17:11,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:11,776 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:11,776 INFO L554 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] [2021-06-06 00:17:11,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:11,977 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:11,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:11,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1606664162, now seen corresponding path program 72 times [2021-06-06 00:17:11,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:11,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044255527] [2021-06-06 00:17:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:12,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:12,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044255527] [2021-06-06 00:17:12,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044255527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:12,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705757273] [2021-06-06 00:17:12,009 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 [2021-06-06 00:17:12,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:17:12,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:12,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:12,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:12,125 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:12,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705757273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:12,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:12,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:12,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295668851] [2021-06-06 00:17:12,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:12,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:12,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:12,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:12,126 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) [2021-06-06 00:17:12,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:12,476 INFO L93 Difference]: Finished difference Result 21217 states and 61477 transitions. [2021-06-06 00:17:12,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:17:12,477 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 [2021-06-06 00:17:12,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:12,505 INFO L225 Difference]: With dead ends: 21217 [2021-06-06 00:17:12,506 INFO L226 Difference]: Without dead ends: 21161 [2021-06-06 00:17:12,506 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 208.9ms TimeCoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:17:12,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21161 states. [2021-06-06 00:17:12,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21161 to 13076. [2021-06-06 00:17:12,751 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) [2021-06-06 00:17:12,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13076 states to 13076 states and 38496 transitions. [2021-06-06 00:17:12,774 INFO L78 Accepts]: Start accepts. Automaton has 13076 states and 38496 transitions. Word has length 37 [2021-06-06 00:17:12,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:12,774 INFO L482 AbstractCegarLoop]: Abstraction has 13076 states and 38496 transitions. [2021-06-06 00:17:12,774 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) [2021-06-06 00:17:12,774 INFO L276 IsEmpty]: Start isEmpty. Operand 13076 states and 38496 transitions. [2021-06-06 00:17:12,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:12,790 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:12,790 INFO L554 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] [2021-06-06 00:17:12,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-06-06 00:17:12,990 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:12,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:12,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1048265624, now seen corresponding path program 73 times [2021-06-06 00:17:12,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:12,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856629937] [2021-06-06 00:17:12,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:13,023 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:13,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:13,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856629937] [2021-06-06 00:17:13,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856629937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:13,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617010386] [2021-06-06 00:17:13,023 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 [2021-06-06 00:17:13,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:13,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:13,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:13,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617010386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:13,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:13,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:13,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353749077] [2021-06-06 00:17:13,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:13,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:13,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:13,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:13,162 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) [2021-06-06 00:17:13,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:13,471 INFO L93 Difference]: Finished difference Result 19540 states and 56766 transitions. [2021-06-06 00:17:13,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:17:13,472 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 [2021-06-06 00:17:13,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:13,506 INFO L225 Difference]: With dead ends: 19540 [2021-06-06 00:17:13,507 INFO L226 Difference]: Without dead ends: 19491 [2021-06-06 00:17:13,507 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:17:13,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19491 states. [2021-06-06 00:17:13,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19491 to 13090. [2021-06-06 00:17:13,856 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) [2021-06-06 00:17:13,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13090 states to 13090 states and 38503 transitions. [2021-06-06 00:17:13,879 INFO L78 Accepts]: Start accepts. Automaton has 13090 states and 38503 transitions. Word has length 37 [2021-06-06 00:17:13,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:13,879 INFO L482 AbstractCegarLoop]: Abstraction has 13090 states and 38503 transitions. [2021-06-06 00:17:13,879 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) [2021-06-06 00:17:13,879 INFO L276 IsEmpty]: Start isEmpty. Operand 13090 states and 38503 transitions. [2021-06-06 00:17:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:13,894 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:13,895 INFO L554 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] [2021-06-06 00:17:14,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-06-06 00:17:14,106 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:14,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:14,107 INFO L82 PathProgramCache]: Analyzing trace with hash -272513428, now seen corresponding path program 74 times [2021-06-06 00:17:14,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:14,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141519521] [2021-06-06 00:17:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:14,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:14,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:14,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141519521] [2021-06-06 00:17:14,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141519521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:14,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178307661] [2021-06-06 00:17:14,142 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 [2021-06-06 00:17:14,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:17:14,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:14,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:14,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:14,253 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:14,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178307661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:14,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:14,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:17:14,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96556216] [2021-06-06 00:17:14,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:17:14,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:14,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:17:14,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:17:14,254 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) [2021-06-06 00:17:14,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:14,676 INFO L93 Difference]: Finished difference Result 18207 states and 52420 transitions. [2021-06-06 00:17:14,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:17:14,676 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 [2021-06-06 00:17:14,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:14,700 INFO L225 Difference]: With dead ends: 18207 [2021-06-06 00:17:14,701 INFO L226 Difference]: Without dead ends: 18147 [2021-06-06 00:17:14,701 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 275.0ms TimeCoverageRelationStatistics Valid=475, Invalid=1007, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:17:14,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18147 states. [2021-06-06 00:17:14,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18147 to 13262. [2021-06-06 00:17:14,908 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) [2021-06-06 00:17:14,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13262 states to 13262 states and 38889 transitions. [2021-06-06 00:17:14,930 INFO L78 Accepts]: Start accepts. Automaton has 13262 states and 38889 transitions. Word has length 37 [2021-06-06 00:17:14,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:14,930 INFO L482 AbstractCegarLoop]: Abstraction has 13262 states and 38889 transitions. [2021-06-06 00:17:14,930 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) [2021-06-06 00:17:14,930 INFO L276 IsEmpty]: Start isEmpty. Operand 13262 states and 38889 transitions. [2021-06-06 00:17:14,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:14,944 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:14,944 INFO L554 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] [2021-06-06 00:17:15,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:15,145 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:15,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:15,145 INFO L82 PathProgramCache]: Analyzing trace with hash 144146212, now seen corresponding path program 75 times [2021-06-06 00:17:15,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:15,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190593067] [2021-06-06 00:17:15,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:15,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:15,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:15,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190593067] [2021-06-06 00:17:15,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190593067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:15,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576979862] [2021-06-06 00:17:15,172 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 [2021-06-06 00:17:15,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:17:15,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:15,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:15,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:15,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576979862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:15,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:15,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:17:15,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836768460] [2021-06-06 00:17:15,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:15,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:15,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:15,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:15,307 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) [2021-06-06 00:17:15,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:15,872 INFO L93 Difference]: Finished difference Result 18702 states and 53466 transitions. [2021-06-06 00:17:15,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:17:15,872 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 [2021-06-06 00:17:15,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:15,903 INFO L225 Difference]: With dead ends: 18702 [2021-06-06 00:17:15,903 INFO L226 Difference]: Without dead ends: 18695 [2021-06-06 00:17:15,904 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 343.8ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:17:15,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18695 states. [2021-06-06 00:17:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18695 to 13690. [2021-06-06 00:17:16,230 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) [2021-06-06 00:17:16,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13690 states to 13690 states and 40115 transitions. [2021-06-06 00:17:16,253 INFO L78 Accepts]: Start accepts. Automaton has 13690 states and 40115 transitions. Word has length 37 [2021-06-06 00:17:16,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:16,254 INFO L482 AbstractCegarLoop]: Abstraction has 13690 states and 40115 transitions. [2021-06-06 00:17:16,254 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) [2021-06-06 00:17:16,254 INFO L276 IsEmpty]: Start isEmpty. Operand 13690 states and 40115 transitions. [2021-06-06 00:17:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:16,270 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:16,270 INFO L554 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] [2021-06-06 00:17:16,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:16,470 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:16,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:16,471 INFO L82 PathProgramCache]: Analyzing trace with hash -198586448, now seen corresponding path program 76 times [2021-06-06 00:17:16,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:16,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724715689] [2021-06-06 00:17:16,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:16,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:16,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724715689] [2021-06-06 00:17:16,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724715689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:16,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440800514] [2021-06-06 00:17:16,504 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 [2021-06-06 00:17:16,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:17:16,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:16,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:16,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:16,624 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:16,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440800514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:16,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:16,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:17:16,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020841265] [2021-06-06 00:17:16,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:17:16,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:16,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:17:16,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:17:16,626 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) [2021-06-06 00:17:17,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:17,092 INFO L93 Difference]: Finished difference Result 19896 states and 57093 transitions. [2021-06-06 00:17:17,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:17:17,093 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 [2021-06-06 00:17:17,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:17,119 INFO L225 Difference]: With dead ends: 19896 [2021-06-06 00:17:17,120 INFO L226 Difference]: Without dead ends: 19782 [2021-06-06 00:17:17,120 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 332.2ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:17:17,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19782 states. [2021-06-06 00:17:17,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19782 to 15598. [2021-06-06 00:17:17,370 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) [2021-06-06 00:17:17,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15598 states to 15598 states and 45637 transitions. [2021-06-06 00:17:17,400 INFO L78 Accepts]: Start accepts. Automaton has 15598 states and 45637 transitions. Word has length 37 [2021-06-06 00:17:17,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:17,400 INFO L482 AbstractCegarLoop]: Abstraction has 15598 states and 45637 transitions. [2021-06-06 00:17:17,400 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) [2021-06-06 00:17:17,400 INFO L276 IsEmpty]: Start isEmpty. Operand 15598 states and 45637 transitions. [2021-06-06 00:17:17,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:17,419 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:17,419 INFO L554 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] [2021-06-06 00:17:17,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-06-06 00:17:17,619 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:17,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:17,621 INFO L82 PathProgramCache]: Analyzing trace with hash 52875454, now seen corresponding path program 77 times [2021-06-06 00:17:17,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:17,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243811297] [2021-06-06 00:17:17,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:17,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:17,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243811297] [2021-06-06 00:17:17,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243811297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:17,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940137629] [2021-06-06 00:17:17,649 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 [2021-06-06 00:17:17,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:17:17,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:17,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:17,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:17,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940137629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:17,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:17,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-06 00:17:17,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229632353] [2021-06-06 00:17:17,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:17,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:17,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:17,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:17,759 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) [2021-06-06 00:17:18,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:18,193 INFO L93 Difference]: Finished difference Result 23975 states and 68834 transitions. [2021-06-06 00:17:18,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:17:18,193 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 [2021-06-06 00:17:18,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:18,227 INFO L225 Difference]: With dead ends: 23975 [2021-06-06 00:17:18,227 INFO L226 Difference]: Without dead ends: 23968 [2021-06-06 00:17:18,227 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 282.7ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:17:18,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23968 states. [2021-06-06 00:17:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23968 to 19902. [2021-06-06 00:17:18,631 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) [2021-06-06 00:17:18,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19902 states to 19902 states and 58171 transitions. [2021-06-06 00:17:18,674 INFO L78 Accepts]: Start accepts. Automaton has 19902 states and 58171 transitions. Word has length 37 [2021-06-06 00:17:18,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:18,674 INFO L482 AbstractCegarLoop]: Abstraction has 19902 states and 58171 transitions. [2021-06-06 00:17:18,674 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) [2021-06-06 00:17:18,674 INFO L276 IsEmpty]: Start isEmpty. Operand 19902 states and 58171 transitions. [2021-06-06 00:17:18,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:18,697 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:18,697 INFO L554 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] [2021-06-06 00:17:18,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-06 00:17:18,898 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:18,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:18,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1380437010, now seen corresponding path program 78 times [2021-06-06 00:17:18,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:18,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961799402] [2021-06-06 00:17:18,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:18,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:18,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:18,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961799402] [2021-06-06 00:17:18,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961799402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:18,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092546670] [2021-06-06 00:17:18,930 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 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 [2021-06-06 00:17:18,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:17:18,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:18,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:18,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:19,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092546670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:19,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:19,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:17:19,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080616212] [2021-06-06 00:17:19,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:17:19,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:19,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:17:19,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:17:19,073 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) [2021-06-06 00:17:19,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:19,272 INFO L93 Difference]: Finished difference Result 22936 states and 66683 transitions. [2021-06-06 00:17:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:17:19,272 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 [2021-06-06 00:17:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:19,305 INFO L225 Difference]: With dead ends: 22936 [2021-06-06 00:17:19,305 INFO L226 Difference]: Without dead ends: 22936 [2021-06-06 00:17:19,306 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:17:19,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22936 states. [2021-06-06 00:17:19,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22936 to 20168. [2021-06-06 00:17:19,642 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) [2021-06-06 00:17:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20168 states to 20168 states and 58930 transitions. [2021-06-06 00:17:19,681 INFO L78 Accepts]: Start accepts. Automaton has 20168 states and 58930 transitions. Word has length 37 [2021-06-06 00:17:19,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:19,681 INFO L482 AbstractCegarLoop]: Abstraction has 20168 states and 58930 transitions. [2021-06-06 00:17:19,681 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) [2021-06-06 00:17:19,681 INFO L276 IsEmpty]: Start isEmpty. Operand 20168 states and 58930 transitions. [2021-06-06 00:17:19,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:19,705 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:19,705 INFO L554 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] [2021-06-06 00:17:19,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-06 00:17:19,905 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:19,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:19,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1382409982, now seen corresponding path program 79 times [2021-06-06 00:17:19,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:19,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347543327] [2021-06-06 00:17:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:19,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:19,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347543327] [2021-06-06 00:17:19,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347543327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:19,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659494074] [2021-06-06 00:17:19,935 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 [2021-06-06 00:17:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:19,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:19,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:20,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659494074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:20,020 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:20,020 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-06 00:17:20,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608968737] [2021-06-06 00:17:20,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:17:20,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:20,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:17:20,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:17:20,020 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) [2021-06-06 00:17:20,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:20,174 INFO L93 Difference]: Finished difference Result 24551 states and 71034 transitions. [2021-06-06 00:17:20,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-06 00:17:20,174 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 [2021-06-06 00:17:20,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:20,210 INFO L225 Difference]: With dead ends: 24551 [2021-06-06 00:17:20,210 INFO L226 Difference]: Without dead ends: 24497 [2021-06-06 00:17:20,210 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:17:20,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24497 states. [2021-06-06 00:17:20,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24497 to 20168. [2021-06-06 00:17:20,514 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) [2021-06-06 00:17:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20168 states to 20168 states and 58920 transitions. [2021-06-06 00:17:20,554 INFO L78 Accepts]: Start accepts. Automaton has 20168 states and 58920 transitions. Word has length 37 [2021-06-06 00:17:20,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:20,554 INFO L482 AbstractCegarLoop]: Abstraction has 20168 states and 58920 transitions. [2021-06-06 00:17:20,554 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) [2021-06-06 00:17:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 20168 states and 58920 transitions. [2021-06-06 00:17:20,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:20,579 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:20,579 INFO L554 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] [2021-06-06 00:17:20,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-06 00:17:20,798 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:20,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:20,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1341647984, now seen corresponding path program 80 times [2021-06-06 00:17:20,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:20,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728163994] [2021-06-06 00:17:20,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:20,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:20,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:20,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728163994] [2021-06-06 00:17:20,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728163994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:20,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304157269] [2021-06-06 00:17:20,829 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 [2021-06-06 00:17:20,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:17:20,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:20,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:20,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:20,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304157269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:20,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:20,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:20,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349283717] [2021-06-06 00:17:20,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:20,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:20,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:20,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:20,928 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) [2021-06-06 00:17:21,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:21,229 INFO L93 Difference]: Finished difference Result 22851 states and 66117 transitions. [2021-06-06 00:17:21,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:17:21,230 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 [2021-06-06 00:17:21,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:21,258 INFO L225 Difference]: With dead ends: 22851 [2021-06-06 00:17:21,258 INFO L226 Difference]: Without dead ends: 22851 [2021-06-06 00:17:21,258 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:17:21,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22851 states. [2021-06-06 00:17:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22851 to 20512. [2021-06-06 00:17:21,520 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) [2021-06-06 00:17:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20512 states to 20512 states and 59896 transitions. [2021-06-06 00:17:21,559 INFO L78 Accepts]: Start accepts. Automaton has 20512 states and 59896 transitions. Word has length 37 [2021-06-06 00:17:21,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:21,559 INFO L482 AbstractCegarLoop]: Abstraction has 20512 states and 59896 transitions. [2021-06-06 00:17:21,559 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) [2021-06-06 00:17:21,559 INFO L276 IsEmpty]: Start isEmpty. Operand 20512 states and 59896 transitions. [2021-06-06 00:17:21,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:21,582 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:21,582 INFO L554 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] [2021-06-06 00:17:21,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-06-06 00:17:21,782 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:21,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:21,783 INFO L82 PathProgramCache]: Analyzing trace with hash -461813350, now seen corresponding path program 81 times [2021-06-06 00:17:21,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:21,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738602505] [2021-06-06 00:17:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:21,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:21,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:21,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:21,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738602505] [2021-06-06 00:17:21,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738602505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:21,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554451271] [2021-06-06 00:17:21,829 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 [2021-06-06 00:17:21,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:17:21,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:21,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:21,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:21,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554451271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:21,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:21,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:21,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807384616] [2021-06-06 00:17:21,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:21,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:21,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:21,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:21,925 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) [2021-06-06 00:17:22,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:22,205 INFO L93 Difference]: Finished difference Result 25378 states and 73051 transitions. [2021-06-06 00:17:22,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:17:22,205 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 [2021-06-06 00:17:22,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:22,241 INFO L225 Difference]: With dead ends: 25378 [2021-06-06 00:17:22,242 INFO L226 Difference]: Without dead ends: 25336 [2021-06-06 00:17:22,242 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 180.5ms TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:17:22,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25336 states. [2021-06-06 00:17:22,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25336 to 21132. [2021-06-06 00:17:22,552 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) [2021-06-06 00:17:22,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21132 states to 21132 states and 61802 transitions. [2021-06-06 00:17:22,590 INFO L78 Accepts]: Start accepts. Automaton has 21132 states and 61802 transitions. Word has length 37 [2021-06-06 00:17:22,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:22,590 INFO L482 AbstractCegarLoop]: Abstraction has 21132 states and 61802 transitions. [2021-06-06 00:17:22,590 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) [2021-06-06 00:17:22,590 INFO L276 IsEmpty]: Start isEmpty. Operand 21132 states and 61802 transitions. [2021-06-06 00:17:22,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:22,613 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:22,613 INFO L554 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] [2021-06-06 00:17:22,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:22,815 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:22,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:22,815 INFO L82 PathProgramCache]: Analyzing trace with hash -664281518, now seen corresponding path program 82 times [2021-06-06 00:17:22,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:22,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605660652] [2021-06-06 00:17:22,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:22,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:22,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:22,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605660652] [2021-06-06 00:17:22,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605660652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:22,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904082815] [2021-06-06 00:17:22,854 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 [2021-06-06 00:17:22,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:17:22,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:22,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:22,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:22,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904082815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:22,978 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:22,978 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:22,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578869177] [2021-06-06 00:17:22,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:22,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:22,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:22,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:22,978 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) [2021-06-06 00:17:23,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:23,413 INFO L93 Difference]: Finished difference Result 26806 states and 77177 transitions. [2021-06-06 00:17:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:17:23,413 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 [2021-06-06 00:17:23,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:23,452 INFO L225 Difference]: With dead ends: 26806 [2021-06-06 00:17:23,452 INFO L226 Difference]: Without dead ends: 26806 [2021-06-06 00:17:23,453 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=425, Invalid=907, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:17:23,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26806 states. [2021-06-06 00:17:23,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26806 to 22606. [2021-06-06 00:17:23,840 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) [2021-06-06 00:17:23,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22606 states to 22606 states and 66025 transitions. [2021-06-06 00:17:23,880 INFO L78 Accepts]: Start accepts. Automaton has 22606 states and 66025 transitions. Word has length 37 [2021-06-06 00:17:23,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:23,881 INFO L482 AbstractCegarLoop]: Abstraction has 22606 states and 66025 transitions. [2021-06-06 00:17:23,881 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) [2021-06-06 00:17:23,881 INFO L276 IsEmpty]: Start isEmpty. Operand 22606 states and 66025 transitions. [2021-06-06 00:17:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:23,906 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:23,906 INFO L554 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] [2021-06-06 00:17:24,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-06 00:17:24,106 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:24,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:24,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1702207848, now seen corresponding path program 83 times [2021-06-06 00:17:24,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:24,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303031766] [2021-06-06 00:17:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:24,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:24,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303031766] [2021-06-06 00:17:24,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303031766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:24,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752648756] [2021-06-06 00:17:24,136 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 [2021-06-06 00:17:24,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:17:24,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:24,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:24,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:24,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752648756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:24,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:24,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:24,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726797191] [2021-06-06 00:17:24,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:24,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:24,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:24,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:24,236 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) [2021-06-06 00:17:24,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:24,598 INFO L93 Difference]: Finished difference Result 29720 states and 85805 transitions. [2021-06-06 00:17:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:17:24,598 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 [2021-06-06 00:17:24,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:24,647 INFO L225 Difference]: With dead ends: 29720 [2021-06-06 00:17:24,647 INFO L226 Difference]: Without dead ends: 29672 [2021-06-06 00:17:24,647 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:17:24,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29672 states. [2021-06-06 00:17:25,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29672 to 25600. [2021-06-06 00:17:25,066 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) [2021-06-06 00:17:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25600 states to 25600 states and 74574 transitions. [2021-06-06 00:17:25,117 INFO L78 Accepts]: Start accepts. Automaton has 25600 states and 74574 transitions. Word has length 37 [2021-06-06 00:17:25,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:25,118 INFO L482 AbstractCegarLoop]: Abstraction has 25600 states and 74574 transitions. [2021-06-06 00:17:25,118 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) [2021-06-06 00:17:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 25600 states and 74574 transitions. [2021-06-06 00:17:25,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:25,146 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:25,146 INFO L554 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] [2021-06-06 00:17:25,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-06 00:17:25,347 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:25,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:25,347 INFO L82 PathProgramCache]: Analyzing trace with hash 369493936, now seen corresponding path program 84 times [2021-06-06 00:17:25,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:25,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551321038] [2021-06-06 00:17:25,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:25,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:25,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551321038] [2021-06-06 00:17:25,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551321038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:25,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849080394] [2021-06-06 00:17:25,379 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 [2021-06-06 00:17:25,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:17:25,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:25,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:25,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:25,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:25,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849080394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:25,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:25,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:25,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548459275] [2021-06-06 00:17:25,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:25,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:25,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:25,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:25,475 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) [2021-06-06 00:17:25,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:25,957 INFO L93 Difference]: Finished difference Result 31521 states and 90635 transitions. [2021-06-06 00:17:25,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:17:25,957 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 [2021-06-06 00:17:25,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:26,003 INFO L225 Difference]: With dead ends: 31521 [2021-06-06 00:17:26,003 INFO L226 Difference]: Without dead ends: 31521 [2021-06-06 00:17:26,003 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-06-06 00:17:26,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31521 states. [2021-06-06 00:17:26,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31521 to 27384. [2021-06-06 00:17:26,512 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) [2021-06-06 00:17:26,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27384 states to 27384 states and 80122 transitions. [2021-06-06 00:17:26,565 INFO L78 Accepts]: Start accepts. Automaton has 27384 states and 80122 transitions. Word has length 37 [2021-06-06 00:17:26,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:26,565 INFO L482 AbstractCegarLoop]: Abstraction has 27384 states and 80122 transitions. [2021-06-06 00:17:26,565 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) [2021-06-06 00:17:26,565 INFO L276 IsEmpty]: Start isEmpty. Operand 27384 states and 80122 transitions. [2021-06-06 00:17:26,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:26,600 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:26,600 INFO L554 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] [2021-06-06 00:17:26,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:26,800 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:26,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:26,801 INFO L82 PathProgramCache]: Analyzing trace with hash 158796890, now seen corresponding path program 85 times [2021-06-06 00:17:26,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:26,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64420471] [2021-06-06 00:17:26,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:26,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:26,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64420471] [2021-06-06 00:17:26,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64420471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:26,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861201796] [2021-06-06 00:17:26,849 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 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 [2021-06-06 00:17:26,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:26,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:26,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:26,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861201796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:26,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:26,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:26,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436616663] [2021-06-06 00:17:26,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:26,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:26,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:26,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:26,964 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) [2021-06-06 00:17:27,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:27,360 INFO L93 Difference]: Finished difference Result 33285 states and 96447 transitions. [2021-06-06 00:17:27,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:17:27,360 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 [2021-06-06 00:17:27,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:27,411 INFO L225 Difference]: With dead ends: 33285 [2021-06-06 00:17:27,411 INFO L226 Difference]: Without dead ends: 33267 [2021-06-06 00:17:27,411 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:17:27,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33267 states. [2021-06-06 00:17:27,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33267 to 27954. [2021-06-06 00:17:27,859 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) [2021-06-06 00:17:27,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27954 states to 27954 states and 81817 transitions. [2021-06-06 00:17:27,916 INFO L78 Accepts]: Start accepts. Automaton has 27954 states and 81817 transitions. Word has length 37 [2021-06-06 00:17:27,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:27,916 INFO L482 AbstractCegarLoop]: Abstraction has 27954 states and 81817 transitions. [2021-06-06 00:17:27,916 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) [2021-06-06 00:17:27,916 INFO L276 IsEmpty]: Start isEmpty. Operand 27954 states and 81817 transitions. [2021-06-06 00:17:27,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:27,952 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:27,953 INFO L554 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] [2021-06-06 00:17:28,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:28,153 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:28,153 INFO L82 PathProgramCache]: Analyzing trace with hash 887548708, now seen corresponding path program 86 times [2021-06-06 00:17:28,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:28,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071519401] [2021-06-06 00:17:28,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:28,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:28,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071519401] [2021-06-06 00:17:28,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071519401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:28,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748320524] [2021-06-06 00:17:28,182 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 [2021-06-06 00:17:28,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:17:28,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:28,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:28,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:28,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748320524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:28,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:28,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:28,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794147780] [2021-06-06 00:17:28,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:28,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:28,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:28,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:28,279 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) [2021-06-06 00:17:28,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:28,979 INFO L93 Difference]: Finished difference Result 32376 states and 93008 transitions. [2021-06-06 00:17:28,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:17:28,979 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 [2021-06-06 00:17:28,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:29,025 INFO L225 Difference]: With dead ends: 32376 [2021-06-06 00:17:29,025 INFO L226 Difference]: Without dead ends: 32369 [2021-06-06 00:17:29,025 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 374.3ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:17:29,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32369 states. [2021-06-06 00:17:29,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32369 to 27014. [2021-06-06 00:17:29,544 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) [2021-06-06 00:17:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27014 states to 27014 states and 78731 transitions. [2021-06-06 00:17:29,601 INFO L78 Accepts]: Start accepts. Automaton has 27014 states and 78731 transitions. Word has length 37 [2021-06-06 00:17:29,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:29,601 INFO L482 AbstractCegarLoop]: Abstraction has 27014 states and 78731 transitions. [2021-06-06 00:17:29,601 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) [2021-06-06 00:17:29,601 INFO L276 IsEmpty]: Start isEmpty. Operand 27014 states and 78731 transitions. [2021-06-06 00:17:29,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:29,634 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:29,634 INFO L554 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] [2021-06-06 00:17:29,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:29,835 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:29,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:29,835 INFO L82 PathProgramCache]: Analyzing trace with hash 510577554, now seen corresponding path program 87 times [2021-06-06 00:17:29,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:29,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80705123] [2021-06-06 00:17:29,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:29,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:29,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80705123] [2021-06-06 00:17:29,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80705123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:29,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324848901] [2021-06-06 00:17:29,875 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 [2021-06-06 00:17:29,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:17:29,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:29,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:29,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:29,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:29,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324848901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:29,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:29,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-06 00:17:29,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818269743] [2021-06-06 00:17:29,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:29,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:29,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:29,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:29,991 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) [2021-06-06 00:17:30,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:30,355 INFO L93 Difference]: Finished difference Result 29628 states and 85439 transitions. [2021-06-06 00:17:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:17:30,355 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 [2021-06-06 00:17:30,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:30,405 INFO L225 Difference]: With dead ends: 29628 [2021-06-06 00:17:30,406 INFO L226 Difference]: Without dead ends: 29614 [2021-06-06 00:17:30,406 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:17:30,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29614 states. [2021-06-06 00:17:30,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29614 to 23956. [2021-06-06 00:17:30,787 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) [2021-06-06 00:17:30,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23956 states to 23956 states and 69820 transitions. [2021-06-06 00:17:30,827 INFO L78 Accepts]: Start accepts. Automaton has 23956 states and 69820 transitions. Word has length 37 [2021-06-06 00:17:30,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:30,827 INFO L482 AbstractCegarLoop]: Abstraction has 23956 states and 69820 transitions. [2021-06-06 00:17:30,827 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) [2021-06-06 00:17:30,827 INFO L276 IsEmpty]: Start isEmpty. Operand 23956 states and 69820 transitions. [2021-06-06 00:17:30,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:30,850 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:30,850 INFO L554 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] [2021-06-06 00:17:31,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-06 00:17:31,051 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:31,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:31,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1704477878, now seen corresponding path program 88 times [2021-06-06 00:17:31,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:31,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21513270] [2021-06-06 00:17:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:31,083 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:31,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:31,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21513270] [2021-06-06 00:17:31,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21513270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:31,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759339749] [2021-06-06 00:17:31,084 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 [2021-06-06 00:17:31,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:17:31,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:31,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:31,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:31,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759339749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:31,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:31,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:17:31,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757300155] [2021-06-06 00:17:31,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:17:31,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:31,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:17:31,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:17:31,204 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) [2021-06-06 00:17:31,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:31,607 INFO L93 Difference]: Finished difference Result 28263 states and 81286 transitions. [2021-06-06 00:17:31,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:17:31,608 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 [2021-06-06 00:17:31,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:31,649 INFO L225 Difference]: With dead ends: 28263 [2021-06-06 00:17:31,649 INFO L226 Difference]: Without dead ends: 28251 [2021-06-06 00:17:31,650 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 235.2ms TimeCoverageRelationStatistics Valid=340, Invalid=782, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:17:31,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28251 states. [2021-06-06 00:17:32,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28251 to 24282. [2021-06-06 00:17:32,055 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) [2021-06-06 00:17:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24282 states to 24282 states and 70787 transitions. [2021-06-06 00:17:32,106 INFO L78 Accepts]: Start accepts. Automaton has 24282 states and 70787 transitions. Word has length 37 [2021-06-06 00:17:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:32,106 INFO L482 AbstractCegarLoop]: Abstraction has 24282 states and 70787 transitions. [2021-06-06 00:17:32,106 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) [2021-06-06 00:17:32,106 INFO L276 IsEmpty]: Start isEmpty. Operand 24282 states and 70787 transitions. [2021-06-06 00:17:32,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:32,135 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:32,135 INFO L554 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] [2021-06-06 00:17:32,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-06-06 00:17:32,335 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:32,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:32,335 INFO L82 PathProgramCache]: Analyzing trace with hash 606853100, now seen corresponding path program 89 times [2021-06-06 00:17:32,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:32,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417600418] [2021-06-06 00:17:32,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:32,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:32,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417600418] [2021-06-06 00:17:32,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417600418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:32,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051059005] [2021-06-06 00:17:32,377 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 [2021-06-06 00:17:32,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:17:32,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:32,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:32,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:32,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:32,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051059005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:32,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:32,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:17:32,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128947378] [2021-06-06 00:17:32,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:32,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:32,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:32,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:32,477 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) [2021-06-06 00:17:32,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:32,870 INFO L93 Difference]: Finished difference Result 30400 states and 87330 transitions. [2021-06-06 00:17:32,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:17:32,871 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 [2021-06-06 00:17:32,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:32,911 INFO L225 Difference]: With dead ends: 30400 [2021-06-06 00:17:32,911 INFO L226 Difference]: Without dead ends: 30394 [2021-06-06 00:17:32,911 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=390, Invalid=800, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:17:32,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30394 states. [2021-06-06 00:17:33,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30394 to 24292. [2021-06-06 00:17:33,253 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) [2021-06-06 00:17:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24292 states to 24292 states and 70824 transitions. [2021-06-06 00:17:33,300 INFO L78 Accepts]: Start accepts. Automaton has 24292 states and 70824 transitions. Word has length 37 [2021-06-06 00:17:33,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:33,300 INFO L482 AbstractCegarLoop]: Abstraction has 24292 states and 70824 transitions. [2021-06-06 00:17:33,300 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) [2021-06-06 00:17:33,300 INFO L276 IsEmpty]: Start isEmpty. Operand 24292 states and 70824 transitions. [2021-06-06 00:17:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:33,328 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:33,328 INFO L554 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] [2021-06-06 00:17:33,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-06 00:17:33,528 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:33,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:33,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1506148470, now seen corresponding path program 90 times [2021-06-06 00:17:33,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:33,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915514709] [2021-06-06 00:17:33,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:33,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:33,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915514709] [2021-06-06 00:17:33,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915514709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:33,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458682337] [2021-06-06 00:17:33,554 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 [2021-06-06 00:17:33,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:17:33,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:33,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:33,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:33,659 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:33,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458682337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:33,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:33,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:17:33,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091645602] [2021-06-06 00:17:33,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:33,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:33,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:33,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:33,660 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) [2021-06-06 00:17:34,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:34,117 INFO L93 Difference]: Finished difference Result 31964 states and 91804 transitions. [2021-06-06 00:17:34,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:17:34,118 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 [2021-06-06 00:17:34,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:34,166 INFO L225 Difference]: With dead ends: 31964 [2021-06-06 00:17:34,166 INFO L226 Difference]: Without dead ends: 31964 [2021-06-06 00:17:34,166 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-06-06 00:17:34,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31964 states. [2021-06-06 00:17:34,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31964 to 26278. [2021-06-06 00:17:34,593 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) [2021-06-06 00:17:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26278 states to 26278 states and 76709 transitions. [2021-06-06 00:17:34,654 INFO L78 Accepts]: Start accepts. Automaton has 26278 states and 76709 transitions. Word has length 37 [2021-06-06 00:17:34,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:34,654 INFO L482 AbstractCegarLoop]: Abstraction has 26278 states and 76709 transitions. [2021-06-06 00:17:34,654 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) [2021-06-06 00:17:34,654 INFO L276 IsEmpty]: Start isEmpty. Operand 26278 states and 76709 transitions. [2021-06-06 00:17:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:34,688 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:34,688 INFO L554 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] [2021-06-06 00:17:34,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-06 00:17:34,888 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:34,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:34,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1647232088, now seen corresponding path program 91 times [2021-06-06 00:17:34,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:34,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032041485] [2021-06-06 00:17:34,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:34,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:34,912 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:17:34,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:34,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032041485] [2021-06-06 00:17:34,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032041485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:34,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893139043] [2021-06-06 00:17:34,912 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 [2021-06-06 00:17:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:35,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:35,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:35,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:35,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893139043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:35,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:35,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-06-06 00:17:35,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374414639] [2021-06-06 00:17:35,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:35,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:35,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:35,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:35,148 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) [2021-06-06 00:17:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:35,573 INFO L93 Difference]: Finished difference Result 31151 states and 89602 transitions. [2021-06-06 00:17:35,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:17:35,573 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 [2021-06-06 00:17:35,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:35,622 INFO L225 Difference]: With dead ends: 31151 [2021-06-06 00:17:35,622 INFO L226 Difference]: Without dead ends: 31130 [2021-06-06 00:17:35,623 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 225.2ms TimeCoverageRelationStatistics Valid=430, Invalid=830, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:17:35,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31130 states. [2021-06-06 00:17:35,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31130 to 23206. [2021-06-06 00:17:35,984 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) [2021-06-06 00:17:36,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23206 states to 23206 states and 67493 transitions. [2021-06-06 00:17:36,027 INFO L78 Accepts]: Start accepts. Automaton has 23206 states and 67493 transitions. Word has length 37 [2021-06-06 00:17:36,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:36,027 INFO L482 AbstractCegarLoop]: Abstraction has 23206 states and 67493 transitions. [2021-06-06 00:17:36,027 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) [2021-06-06 00:17:36,027 INFO L276 IsEmpty]: Start isEmpty. Operand 23206 states and 67493 transitions. [2021-06-06 00:17:36,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:36,052 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:36,052 INFO L554 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] [2021-06-06 00:17:36,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:36,252 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:36,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:36,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1731630862, now seen corresponding path program 92 times [2021-06-06 00:17:36,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:36,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276724590] [2021-06-06 00:17:36,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:36,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:36,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:36,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276724590] [2021-06-06 00:17:36,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276724590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:36,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950011667] [2021-06-06 00:17:36,281 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 [2021-06-06 00:17:36,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:17:36,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:36,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:36,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:36,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:36,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950011667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:36,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:36,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-06 00:17:36,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019324121] [2021-06-06 00:17:36,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:17:36,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:36,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:17:36,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:17:36,377 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) [2021-06-06 00:17:36,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:36,703 INFO L93 Difference]: Finished difference Result 29544 states and 84782 transitions. [2021-06-06 00:17:36,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:17:36,704 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 [2021-06-06 00:17:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:36,747 INFO L225 Difference]: With dead ends: 29544 [2021-06-06 00:17:36,747 INFO L226 Difference]: Without dead ends: 29488 [2021-06-06 00:17:36,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:17:36,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29488 states. [2021-06-06 00:17:37,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29488 to 24042. [2021-06-06 00:17:37,101 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) [2021-06-06 00:17:37,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24042 states to 24042 states and 70059 transitions. [2021-06-06 00:17:37,154 INFO L78 Accepts]: Start accepts. Automaton has 24042 states and 70059 transitions. Word has length 37 [2021-06-06 00:17:37,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:37,154 INFO L482 AbstractCegarLoop]: Abstraction has 24042 states and 70059 transitions. [2021-06-06 00:17:37,154 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) [2021-06-06 00:17:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 24042 states and 70059 transitions. [2021-06-06 00:17:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:37,184 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:37,184 INFO L554 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] [2021-06-06 00:17:37,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-06 00:17:37,385 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:37,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:37,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1163931468, now seen corresponding path program 93 times [2021-06-06 00:17:37,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:37,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353085952] [2021-06-06 00:17:37,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:37,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:37,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:37,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353085952] [2021-06-06 00:17:37,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353085952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:37,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077708394] [2021-06-06 00:17:37,416 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 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 [2021-06-06 00:17:37,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:17:37,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:37,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:37,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:37,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077708394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:37,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:37,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:17:37,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656713453] [2021-06-06 00:17:37,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:17:37,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:37,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:17:37,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:17:37,535 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) [2021-06-06 00:17:37,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:37,926 INFO L93 Difference]: Finished difference Result 30061 states and 86344 transitions. [2021-06-06 00:17:37,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:17:37,926 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 [2021-06-06 00:17:37,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:37,973 INFO L225 Difference]: With dead ends: 30061 [2021-06-06 00:17:37,973 INFO L226 Difference]: Without dead ends: 30049 [2021-06-06 00:17:37,974 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 239.2ms TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:17:38,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30049 states. [2021-06-06 00:17:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30049 to 25534. [2021-06-06 00:17:38,428 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) [2021-06-06 00:17:38,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25534 states to 25534 states and 74217 transitions. [2021-06-06 00:17:38,479 INFO L78 Accepts]: Start accepts. Automaton has 25534 states and 74217 transitions. Word has length 37 [2021-06-06 00:17:38,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:38,479 INFO L482 AbstractCegarLoop]: Abstraction has 25534 states and 74217 transitions. [2021-06-06 00:17:38,479 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) [2021-06-06 00:17:38,479 INFO L276 IsEmpty]: Start isEmpty. Operand 25534 states and 74217 transitions. [2021-06-06 00:17:38,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:38,507 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:38,507 INFO L554 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] [2021-06-06 00:17:38,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-06 00:17:38,708 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:38,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:38,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1502315474, now seen corresponding path program 94 times [2021-06-06 00:17:38,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:38,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581014475] [2021-06-06 00:17:38,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:38,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:38,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:38,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581014475] [2021-06-06 00:17:38,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581014475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:38,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685919419] [2021-06-06 00:17:38,753 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 [2021-06-06 00:17:38,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:17:38,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:38,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:38,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:38,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685919419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:38,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:38,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:17:38,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101635043] [2021-06-06 00:17:38,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:17:38,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:38,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:17:38,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:17:38,886 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) [2021-06-06 00:17:39,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:39,351 INFO L93 Difference]: Finished difference Result 36194 states and 103786 transitions. [2021-06-06 00:17:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:17:39,351 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 [2021-06-06 00:17:39,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:39,407 INFO L225 Difference]: With dead ends: 36194 [2021-06-06 00:17:39,407 INFO L226 Difference]: Without dead ends: 36188 [2021-06-06 00:17:39,407 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 281.0ms TimeCoverageRelationStatistics Valid=467, Invalid=1015, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:17:39,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36188 states. [2021-06-06 00:17:39,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36188 to 29604. [2021-06-06 00:17:39,879 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) [2021-06-06 00:17:39,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29604 states to 29604 states and 86226 transitions. [2021-06-06 00:17:39,933 INFO L78 Accepts]: Start accepts. Automaton has 29604 states and 86226 transitions. Word has length 37 [2021-06-06 00:17:39,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:39,933 INFO L482 AbstractCegarLoop]: Abstraction has 29604 states and 86226 transitions. [2021-06-06 00:17:39,933 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) [2021-06-06 00:17:39,934 INFO L276 IsEmpty]: Start isEmpty. Operand 29604 states and 86226 transitions. [2021-06-06 00:17:39,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:39,970 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:39,970 INFO L554 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] [2021-06-06 00:17:40,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:40,171 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:40,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:40,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1313090188, now seen corresponding path program 95 times [2021-06-06 00:17:40,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:40,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679810083] [2021-06-06 00:17:40,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:40,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:40,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:40,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679810083] [2021-06-06 00:17:40,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679810083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:40,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243659192] [2021-06-06 00:17:40,193 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 [2021-06-06 00:17:40,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:17:40,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:40,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:40,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:40,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243659192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:40,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:40,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-06 00:17:40,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396481992] [2021-06-06 00:17:40,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:40,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:40,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:40,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:40,305 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) [2021-06-06 00:17:40,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:40,790 INFO L93 Difference]: Finished difference Result 41937 states and 120606 transitions. [2021-06-06 00:17:40,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-06 00:17:40,790 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 [2021-06-06 00:17:40,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:40,853 INFO L225 Difference]: With dead ends: 41937 [2021-06-06 00:17:40,853 INFO L226 Difference]: Without dead ends: 41937 [2021-06-06 00:17:40,853 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 272.6ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:17:40,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41937 states. [2021-06-06 00:17:41,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41937 to 35832. [2021-06-06 00:17:41,551 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) [2021-06-06 00:17:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35832 states to 35832 states and 104288 transitions. [2021-06-06 00:17:41,628 INFO L78 Accepts]: Start accepts. Automaton has 35832 states and 104288 transitions. Word has length 37 [2021-06-06 00:17:41,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:41,628 INFO L482 AbstractCegarLoop]: Abstraction has 35832 states and 104288 transitions. [2021-06-06 00:17:41,628 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) [2021-06-06 00:17:41,628 INFO L276 IsEmpty]: Start isEmpty. Operand 35832 states and 104288 transitions. [2021-06-06 00:17:41,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:41,671 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:41,672 INFO L554 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] [2021-06-06 00:17:41,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,100 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:41,872 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:41,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:41,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1172006570, now seen corresponding path program 96 times [2021-06-06 00:17:41,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:41,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249631235] [2021-06-06 00:17:41,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:17:41,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:41,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249631235] [2021-06-06 00:17:41,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249631235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:41,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780333058] [2021-06-06 00:17:41,895 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 [2021-06-06 00:17:41,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:17:41,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:41,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:41,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:42,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780333058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:42,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:42,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-06-06 00:17:42,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075763452] [2021-06-06 00:17:42,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:17:42,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:42,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:17:42,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:17:42,003 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) [2021-06-06 00:17:42,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:42,498 INFO L93 Difference]: Finished difference Result 41300 states and 118909 transitions. [2021-06-06 00:17:42,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:17:42,499 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 [2021-06-06 00:17:42,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:42,564 INFO L225 Difference]: With dead ends: 41300 [2021-06-06 00:17:42,564 INFO L226 Difference]: Without dead ends: 41286 [2021-06-06 00:17:42,564 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=466, Invalid=940, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:17:42,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41286 states. [2021-06-06 00:17:43,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41286 to 35320. [2021-06-06 00:17:43,110 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) [2021-06-06 00:17:43,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35320 states to 35320 states and 102640 transitions. [2021-06-06 00:17:43,176 INFO L78 Accepts]: Start accepts. Automaton has 35320 states and 102640 transitions. Word has length 37 [2021-06-06 00:17:43,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:43,176 INFO L482 AbstractCegarLoop]: Abstraction has 35320 states and 102640 transitions. [2021-06-06 00:17:43,176 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) [2021-06-06 00:17:43,176 INFO L276 IsEmpty]: Start isEmpty. Operand 35320 states and 102640 transitions. [2021-06-06 00:17:43,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:43,215 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:43,215 INFO L554 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] [2021-06-06 00:17:43,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:43,417 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:43,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:43,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1087607796, now seen corresponding path program 97 times [2021-06-06 00:17:43,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:43,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059070327] [2021-06-06 00:17:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:43,460 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:17:43,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:43,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059070327] [2021-06-06 00:17:43,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059070327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:43,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004634649] [2021-06-06 00:17:43,460 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 [2021-06-06 00:17:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:43,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:43,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:43,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:43,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004634649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:43,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:43,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-06-06 00:17:43,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834700354] [2021-06-06 00:17:43,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-06 00:17:43,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:43,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-06 00:17:43,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-06-06 00:17:43,594 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) [2021-06-06 00:17:44,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:44,127 INFO L93 Difference]: Finished difference Result 41805 states and 120268 transitions. [2021-06-06 00:17:44,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:17:44,127 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 [2021-06-06 00:17:44,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:44,201 INFO L225 Difference]: With dead ends: 41805 [2021-06-06 00:17:44,201 INFO L226 Difference]: Without dead ends: 41749 [2021-06-06 00:17:44,202 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 298.1ms TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:17:44,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41749 states. [2021-06-06 00:17:44,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41749 to 36324. [2021-06-06 00:17:44,751 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) [2021-06-06 00:17:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36324 states to 36324 states and 105540 transitions. [2021-06-06 00:17:44,821 INFO L78 Accepts]: Start accepts. Automaton has 36324 states and 105540 transitions. Word has length 37 [2021-06-06 00:17:44,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:44,822 INFO L482 AbstractCegarLoop]: Abstraction has 36324 states and 105540 transitions. [2021-06-06 00:17:44,822 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) [2021-06-06 00:17:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 36324 states and 105540 transitions. [2021-06-06 00:17:45,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-06 00:17:45,061 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:45,061 INFO L554 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] [2021-06-06 00:17:45,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:45,262 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:45,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:45,263 INFO L82 PathProgramCache]: Analyzing trace with hash 552429714, now seen corresponding path program 98 times [2021-06-06 00:17:45,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:45,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160002878] [2021-06-06 00:17:45,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:45,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:45,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:45,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160002878] [2021-06-06 00:17:45,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160002878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:45,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327957635] [2021-06-06 00:17:45,294 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 [2021-06-06 00:17:45,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:17:45,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:45,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-06 00:17:45,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:45,400 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:45,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327957635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:45,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:45,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-06-06 00:17:45,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380998680] [2021-06-06 00:17:45,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:17:45,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:45,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:17:45,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:17:45,401 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) [2021-06-06 00:17:45,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:45,793 INFO L93 Difference]: Finished difference Result 42907 states and 123545 transitions. [2021-06-06 00:17:45,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:17:45,794 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 [2021-06-06 00:17:45,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:45,862 INFO L225 Difference]: With dead ends: 42907 [2021-06-06 00:17:45,862 INFO L226 Difference]: Without dead ends: 42809 [2021-06-06 00:17:45,862 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 214.0ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:17:45,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42809 states. [2021-06-06 00:17:46,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42809 to 37654. [2021-06-06 00:17:46,414 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) [2021-06-06 00:17:46,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37654 states to 37654 states and 109371 transitions. [2021-06-06 00:17:46,486 INFO L78 Accepts]: Start accepts. Automaton has 37654 states and 109371 transitions. Word has length 37 [2021-06-06 00:17:46,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:46,486 INFO L482 AbstractCegarLoop]: Abstraction has 37654 states and 109371 transitions. [2021-06-06 00:17:46,487 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) [2021-06-06 00:17:46,487 INFO L276 IsEmpty]: Start isEmpty. Operand 37654 states and 109371 transitions. [2021-06-06 00:17:46,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:17:46,530 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:46,530 INFO L554 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] [2021-06-06 00:17:46,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:46,730 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:46,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:46,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1312568382, now seen corresponding path program 99 times [2021-06-06 00:17:46,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:46,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005583149] [2021-06-06 00:17:46,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:46,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:46,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:46,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005583149] [2021-06-06 00:17:46,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005583149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:46,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182240867] [2021-06-06 00:17:46,871 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 [2021-06-06 00:17:46,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:17:46,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:46,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:17:46,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:47,158 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-06 00:17:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:47,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182240867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:47,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:47,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-06 00:17:47,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684122829] [2021-06-06 00:17:47,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:17:47,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:47,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:17:47,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:17:47,248 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) [2021-06-06 00:17:47,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:47,595 INFO L93 Difference]: Finished difference Result 53826 states and 156188 transitions. [2021-06-06 00:17:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:17:47,596 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 [2021-06-06 00:17:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:47,692 INFO L225 Difference]: With dead ends: 53826 [2021-06-06 00:17:47,693 INFO L226 Difference]: Without dead ends: 53788 [2021-06-06 00:17:47,693 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 408.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:17:47,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53788 states. [2021-06-06 00:17:48,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53788 to 37682. [2021-06-06 00:17:48,430 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) [2021-06-06 00:17:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37682 states to 37682 states and 109431 transitions. [2021-06-06 00:17:48,506 INFO L78 Accepts]: Start accepts. Automaton has 37682 states and 109431 transitions. Word has length 40 [2021-06-06 00:17:48,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:48,507 INFO L482 AbstractCegarLoop]: Abstraction has 37682 states and 109431 transitions. [2021-06-06 00:17:48,507 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) [2021-06-06 00:17:48,507 INFO L276 IsEmpty]: Start isEmpty. Operand 37682 states and 109431 transitions. [2021-06-06 00:17:48,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:17:48,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:48,552 INFO L554 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] [2021-06-06 00:17:48,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-06 00:17:48,752 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:48,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:48,753 INFO L82 PathProgramCache]: Analyzing trace with hash 920480774, now seen corresponding path program 100 times [2021-06-06 00:17:48,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:48,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164572442] [2021-06-06 00:17:48,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:48,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:48,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:48,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164572442] [2021-06-06 00:17:48,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164572442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:48,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693925172] [2021-06-06 00:17:48,875 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 [2021-06-06 00:17:48,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:17:48,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:48,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:17:48,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:49,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693925172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:49,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:49,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-06 00:17:49,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414147823] [2021-06-06 00:17:49,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:17:49,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:49,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:17:49,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:17:49,057 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) [2021-06-06 00:17:49,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:49,559 INFO L93 Difference]: Finished difference Result 61487 states and 178572 transitions. [2021-06-06 00:17:49,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:17:49,559 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 [2021-06-06 00:17:49,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:49,676 INFO L225 Difference]: With dead ends: 61487 [2021-06-06 00:17:49,677 INFO L226 Difference]: Without dead ends: 61405 [2021-06-06 00:17:49,677 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:17:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61405 states. [2021-06-06 00:17:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61405 to 44129. [2021-06-06 00:17:50,823 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) [2021-06-06 00:17:51,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44129 states to 44129 states and 128398 transitions. [2021-06-06 00:17:51,047 INFO L78 Accepts]: Start accepts. Automaton has 44129 states and 128398 transitions. Word has length 40 [2021-06-06 00:17:51,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:51,047 INFO L482 AbstractCegarLoop]: Abstraction has 44129 states and 128398 transitions. [2021-06-06 00:17:51,047 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) [2021-06-06 00:17:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand 44129 states and 128398 transitions. [2021-06-06 00:17:51,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:17:51,111 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:51,111 INFO L554 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] [2021-06-06 00:17:51,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-06 00:17:51,312 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:51,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:51,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1516586690, now seen corresponding path program 101 times [2021-06-06 00:17:51,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:51,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668328490] [2021-06-06 00:17:51,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:51,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:51,425 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:51,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:51,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668328490] [2021-06-06 00:17:51,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668328490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:51,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342173568] [2021-06-06 00:17:51,425 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 [2021-06-06 00:17:51,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:17:51,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:51,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:17:51,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:51,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342173568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:51,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:51,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-06 00:17:51,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387370364] [2021-06-06 00:17:51,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:17:51,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:51,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:17:51,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:17:51,613 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) [2021-06-06 00:17:52,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:52,367 INFO L93 Difference]: Finished difference Result 61471 states and 178534 transitions. [2021-06-06 00:17:52,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:17:52,368 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 [2021-06-06 00:17:52,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:52,480 INFO L225 Difference]: With dead ends: 61471 [2021-06-06 00:17:52,480 INFO L226 Difference]: Without dead ends: 61359 [2021-06-06 00:17:52,480 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-06 00:17:52,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61359 states. [2021-06-06 00:17:53,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61359 to 42975. [2021-06-06 00:17:53,235 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) [2021-06-06 00:17:53,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42975 states to 42975 states and 124871 transitions. [2021-06-06 00:17:53,316 INFO L78 Accepts]: Start accepts. Automaton has 42975 states and 124871 transitions. Word has length 40 [2021-06-06 00:17:53,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:53,316 INFO L482 AbstractCegarLoop]: Abstraction has 42975 states and 124871 transitions. [2021-06-06 00:17:53,316 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) [2021-06-06 00:17:53,316 INFO L276 IsEmpty]: Start isEmpty. Operand 42975 states and 124871 transitions. [2021-06-06 00:17:53,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:17:53,364 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:53,364 INFO L554 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] [2021-06-06 00:17:53,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-06 00:17:53,565 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:53,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:53,565 INFO L82 PathProgramCache]: Analyzing trace with hash 459063162, now seen corresponding path program 102 times [2021-06-06 00:17:53,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:53,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635307703] [2021-06-06 00:17:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:53,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:53,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:53,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635307703] [2021-06-06 00:17:53,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635307703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:53,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561518320] [2021-06-06 00:17:53,680 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 [2021-06-06 00:17:53,704 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:17:53,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:53,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:17:53,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:54,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561518320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:54,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:54,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-06 00:17:54,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210663969] [2021-06-06 00:17:54,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:17:54,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:54,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:17:54,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:17:54,063 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) [2021-06-06 00:17:54,731 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-06-06 00:17:54,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:54,975 INFO L93 Difference]: Finished difference Result 61721 states and 178788 transitions. [2021-06-06 00:17:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-06 00:17:54,976 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 [2021-06-06 00:17:54,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:55,081 INFO L225 Difference]: With dead ends: 61721 [2021-06-06 00:17:55,081 INFO L226 Difference]: Without dead ends: 61604 [2021-06-06 00:17:55,081 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 730.7ms TimeCoverageRelationStatistics Valid=150, Invalid=1410, Unknown=0, NotChecked=0, Total=1560 [2021-06-06 00:17:55,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61604 states. [2021-06-06 00:17:55,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61604 to 43605. [2021-06-06 00:17:55,965 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) [2021-06-06 00:17:56,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43605 states to 43605 states and 126728 transitions. [2021-06-06 00:17:56,053 INFO L78 Accepts]: Start accepts. Automaton has 43605 states and 126728 transitions. Word has length 40 [2021-06-06 00:17:56,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:56,054 INFO L482 AbstractCegarLoop]: Abstraction has 43605 states and 126728 transitions. [2021-06-06 00:17:56,054 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) [2021-06-06 00:17:56,054 INFO L276 IsEmpty]: Start isEmpty. Operand 43605 states and 126728 transitions. [2021-06-06 00:17:56,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:17:56,106 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:56,106 INFO L554 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] [2021-06-06 00:17:56,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:56,307 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:56,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:56,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1637637984, now seen corresponding path program 103 times [2021-06-06 00:17:56,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:56,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251455760] [2021-06-06 00:17:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:56,440 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:56,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:56,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251455760] [2021-06-06 00:17:56,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251455760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:56,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330356830] [2021-06-06 00:17:56,441 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 [2021-06-06 00:17:56,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:56,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:17:56,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:56,639 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:56,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330356830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:56,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:56,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-06 00:17:56,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186897154] [2021-06-06 00:17:56,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:17:56,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:56,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:17:56,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:17:56,641 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) [2021-06-06 00:17:57,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:17:57,407 INFO L93 Difference]: Finished difference Result 61267 states and 177882 transitions. [2021-06-06 00:17:57,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:17:57,407 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 [2021-06-06 00:17:57,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:17:57,532 INFO L225 Difference]: With dead ends: 61267 [2021-06-06 00:17:57,532 INFO L226 Difference]: Without dead ends: 61191 [2021-06-06 00:17:57,532 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 262.2ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:17:57,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61191 states. [2021-06-06 00:17:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61191 to 44261. [2021-06-06 00:17:58,461 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) [2021-06-06 00:17:58,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44261 states to 44261 states and 128682 transitions. [2021-06-06 00:17:58,557 INFO L78 Accepts]: Start accepts. Automaton has 44261 states and 128682 transitions. Word has length 40 [2021-06-06 00:17:58,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:17:58,557 INFO L482 AbstractCegarLoop]: Abstraction has 44261 states and 128682 transitions. [2021-06-06 00:17:58,557 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) [2021-06-06 00:17:58,557 INFO L276 IsEmpty]: Start isEmpty. Operand 44261 states and 128682 transitions. [2021-06-06 00:17:58,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:17:58,611 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:17:58,611 INFO L554 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] [2021-06-06 00:17:58,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:17:58,812 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:17:58,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:17:58,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1202515386, now seen corresponding path program 104 times [2021-06-06 00:17:58,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:17:58,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105509540] [2021-06-06 00:17:58,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:17:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:17:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:58,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:17:58,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105509540] [2021-06-06 00:17:58,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105509540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:58,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512294491] [2021-06-06 00:17:58,951 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 [2021-06-06 00:17:58,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:17:58,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:17:58,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:17:58,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:17:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:17:59,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512294491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:17:59,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:17:59,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-06 00:17:59,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222386243] [2021-06-06 00:17:59,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:17:59,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:17:59,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:17:59,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:17:59,191 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) [2021-06-06 00:18:00,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:00,066 INFO L93 Difference]: Finished difference Result 61530 states and 178419 transitions. [2021-06-06 00:18:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:18:00,066 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 [2021-06-06 00:18:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:00,176 INFO L225 Difference]: With dead ends: 61530 [2021-06-06 00:18:00,176 INFO L226 Difference]: Without dead ends: 61492 [2021-06-06 00:18:00,176 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 501.1ms TimeCoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:18:00,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61492 states. [2021-06-06 00:18:01,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61492 to 44283. [2021-06-06 00:18:01,158 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) [2021-06-06 00:18:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44283 states to 44283 states and 128747 transitions. [2021-06-06 00:18:01,245 INFO L78 Accepts]: Start accepts. Automaton has 44283 states and 128747 transitions. Word has length 40 [2021-06-06 00:18:01,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:01,245 INFO L482 AbstractCegarLoop]: Abstraction has 44283 states and 128747 transitions. [2021-06-06 00:18:01,245 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) [2021-06-06 00:18:01,245 INFO L276 IsEmpty]: Start isEmpty. Operand 44283 states and 128747 transitions. [2021-06-06 00:18:01,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:01,296 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:01,296 INFO L554 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] [2021-06-06 00:18:01,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:01,496 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:01,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:01,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1556734402, now seen corresponding path program 105 times [2021-06-06 00:18:01,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:01,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589768532] [2021-06-06 00:18:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:01,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:01,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589768532] [2021-06-06 00:18:01,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589768532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:01,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925089645] [2021-06-06 00:18:01,608 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 [2021-06-06 00:18:01,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:18:01,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:01,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:18:01,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:01,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925089645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:01,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:01,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-06 00:18:01,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394555701] [2021-06-06 00:18:01,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:18:01,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:01,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:18:01,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:18:01,816 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) [2021-06-06 00:18:02,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:02,631 INFO L93 Difference]: Finished difference Result 56563 states and 164364 transitions. [2021-06-06 00:18:02,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:18:02,631 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 [2021-06-06 00:18:02,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:02,726 INFO L225 Difference]: With dead ends: 56563 [2021-06-06 00:18:02,726 INFO L226 Difference]: Without dead ends: 56457 [2021-06-06 00:18:02,726 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:18:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56457 states. [2021-06-06 00:18:03,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56457 to 52795. [2021-06-06 00:18:03,647 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) [2021-06-06 00:18:03,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52795 states to 52795 states and 154119 transitions. [2021-06-06 00:18:03,758 INFO L78 Accepts]: Start accepts. Automaton has 52795 states and 154119 transitions. Word has length 40 [2021-06-06 00:18:03,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:03,758 INFO L482 AbstractCegarLoop]: Abstraction has 52795 states and 154119 transitions. [2021-06-06 00:18:03,758 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) [2021-06-06 00:18:03,758 INFO L276 IsEmpty]: Start isEmpty. Operand 52795 states and 154119 transitions. [2021-06-06 00:18:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:03,841 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:03,841 INFO L554 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] [2021-06-06 00:18:04,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-06 00:18:04,042 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:04,042 INFO L82 PathProgramCache]: Analyzing trace with hash -280230338, now seen corresponding path program 106 times [2021-06-06 00:18:04,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:04,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017445907] [2021-06-06 00:18:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:04,166 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:04,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:04,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017445907] [2021-06-06 00:18:04,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017445907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:04,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923494928] [2021-06-06 00:18:04,166 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 [2021-06-06 00:18:04,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:18:04,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:04,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:04,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:04,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923494928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:04,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:04,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-06 00:18:04,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806988394] [2021-06-06 00:18:04,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:18:04,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:04,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:18:04,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:18:04,572 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) [2021-06-06 00:18:05,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:05,061 INFO L93 Difference]: Finished difference Result 57562 states and 167245 transitions. [2021-06-06 00:18:05,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:18:05,061 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 [2021-06-06 00:18:05,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:05,157 INFO L225 Difference]: With dead ends: 57562 [2021-06-06 00:18:05,157 INFO L226 Difference]: Without dead ends: 57438 [2021-06-06 00:18:05,158 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 294.5ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:18:05,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57438 states. [2021-06-06 00:18:05,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57438 to 51595. [2021-06-06 00:18:06,048 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) [2021-06-06 00:18:06,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51595 states to 51595 states and 150393 transitions. [2021-06-06 00:18:06,162 INFO L78 Accepts]: Start accepts. Automaton has 51595 states and 150393 transitions. Word has length 40 [2021-06-06 00:18:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:06,162 INFO L482 AbstractCegarLoop]: Abstraction has 51595 states and 150393 transitions. [2021-06-06 00:18:06,162 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) [2021-06-06 00:18:06,162 INFO L276 IsEmpty]: Start isEmpty. Operand 51595 states and 150393 transitions. [2021-06-06 00:18:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:06,431 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:06,431 INFO L554 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] [2021-06-06 00:18:06,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:06,631 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:06,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:06,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1270374918, now seen corresponding path program 107 times [2021-06-06 00:18:06,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:06,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425382683] [2021-06-06 00:18:06,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:06,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:06,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425382683] [2021-06-06 00:18:06,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425382683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:06,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298181418] [2021-06-06 00:18:06,766 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 [2021-06-06 00:18:06,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:18:06,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:06,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:06,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:06,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298181418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:06,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:06,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-06 00:18:06,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103574614] [2021-06-06 00:18:06,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:18:06,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:06,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:18:06,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:18:06,989 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) [2021-06-06 00:18:07,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:07,498 INFO L93 Difference]: Finished difference Result 55561 states and 161164 transitions. [2021-06-06 00:18:07,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:18:07,498 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 [2021-06-06 00:18:07,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:07,619 INFO L225 Difference]: With dead ends: 55561 [2021-06-06 00:18:07,619 INFO L226 Difference]: Without dead ends: 55437 [2021-06-06 00:18:07,619 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 278.4ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:18:07,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55437 states. [2021-06-06 00:18:08,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55437 to 50887. [2021-06-06 00:18:08,535 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) [2021-06-06 00:18:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50887 states to 50887 states and 148297 transitions. [2021-06-06 00:18:08,641 INFO L78 Accepts]: Start accepts. Automaton has 50887 states and 148297 transitions. Word has length 40 [2021-06-06 00:18:08,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:08,641 INFO L482 AbstractCegarLoop]: Abstraction has 50887 states and 148297 transitions. [2021-06-06 00:18:08,641 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) [2021-06-06 00:18:08,641 INFO L276 IsEmpty]: Start isEmpty. Operand 50887 states and 148297 transitions. [2021-06-06 00:18:08,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:08,883 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:08,883 INFO L554 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] [2021-06-06 00:18:09,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-06 00:18:09,105 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:09,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:09,105 INFO L82 PathProgramCache]: Analyzing trace with hash 626264254, now seen corresponding path program 108 times [2021-06-06 00:18:09,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:09,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913975884] [2021-06-06 00:18:09,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:09,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:09,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913975884] [2021-06-06 00:18:09,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913975884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:09,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722198288] [2021-06-06 00:18:09,212 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 [2021-06-06 00:18:09,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:18:09,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:09,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:09,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:09,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722198288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:09,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:09,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-06 00:18:09,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040537488] [2021-06-06 00:18:09,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:18:09,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:09,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:18:09,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:18:09,401 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) [2021-06-06 00:18:09,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:09,794 INFO L93 Difference]: Finished difference Result 54386 states and 157811 transitions. [2021-06-06 00:18:09,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:18:09,795 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 [2021-06-06 00:18:09,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:09,889 INFO L225 Difference]: With dead ends: 54386 [2021-06-06 00:18:09,889 INFO L226 Difference]: Without dead ends: 54310 [2021-06-06 00:18:09,889 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:18:09,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54310 states. [2021-06-06 00:18:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54310 to 50291. [2021-06-06 00:18:10,697 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) [2021-06-06 00:18:10,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50291 states to 50291 states and 146519 transitions. [2021-06-06 00:18:10,816 INFO L78 Accepts]: Start accepts. Automaton has 50291 states and 146519 transitions. Word has length 40 [2021-06-06 00:18:10,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:10,816 INFO L482 AbstractCegarLoop]: Abstraction has 50291 states and 146519 transitions. [2021-06-06 00:18:10,816 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) [2021-06-06 00:18:10,816 INFO L276 IsEmpty]: Start isEmpty. Operand 50291 states and 146519 transitions. [2021-06-06 00:18:10,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:10,884 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:10,884 INFO L554 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] [2021-06-06 00:18:11,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:11,084 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:11,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:11,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1839351558, now seen corresponding path program 109 times [2021-06-06 00:18:11,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:11,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554090269] [2021-06-06 00:18:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:11,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:11,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:11,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554090269] [2021-06-06 00:18:11,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554090269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:11,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323643359] [2021-06-06 00:18:11,230 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 [2021-06-06 00:18:11,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:11,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:11,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:11,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323643359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:11,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:11,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-06 00:18:11,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434859338] [2021-06-06 00:18:11,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:18:11,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:11,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:18:11,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:18:11,594 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) [2021-06-06 00:18:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:12,004 INFO L93 Difference]: Finished difference Result 54366 states and 157749 transitions. [2021-06-06 00:18:12,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:18:12,004 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 [2021-06-06 00:18:12,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:12,097 INFO L225 Difference]: With dead ends: 54366 [2021-06-06 00:18:12,097 INFO L226 Difference]: Without dead ends: 54290 [2021-06-06 00:18:12,098 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 264.0ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:18:12,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54290 states. [2021-06-06 00:18:12,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54290 to 50899. [2021-06-06 00:18:13,033 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) [2021-06-06 00:18:13,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50899 states to 50899 states and 148314 transitions. [2021-06-06 00:18:13,142 INFO L78 Accepts]: Start accepts. Automaton has 50899 states and 148314 transitions. Word has length 40 [2021-06-06 00:18:13,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:13,142 INFO L482 AbstractCegarLoop]: Abstraction has 50899 states and 148314 transitions. [2021-06-06 00:18:13,142 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) [2021-06-06 00:18:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 50899 states and 148314 transitions. [2021-06-06 00:18:13,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:13,202 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:13,202 INFO L554 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] [2021-06-06 00:18:13,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:13,404 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:13,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:13,404 INFO L82 PathProgramCache]: Analyzing trace with hash 665879302, now seen corresponding path program 110 times [2021-06-06 00:18:13,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:13,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839926524] [2021-06-06 00:18:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:13,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:13,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:13,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839926524] [2021-06-06 00:18:13,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839926524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:13,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227713248] [2021-06-06 00:18:13,528 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 [2021-06-06 00:18:13,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:18:13,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:13,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:18:13,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:13,757 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:13,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227713248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:13,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:13,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-06 00:18:13,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293229368] [2021-06-06 00:18:13,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:18:13,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:13,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:18:13,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:18:13,758 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) [2021-06-06 00:18:14,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:14,640 INFO L93 Difference]: Finished difference Result 57635 states and 168077 transitions. [2021-06-06 00:18:14,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:18:14,645 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 [2021-06-06 00:18:14,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:14,745 INFO L225 Difference]: With dead ends: 57635 [2021-06-06 00:18:14,745 INFO L226 Difference]: Without dead ends: 57513 [2021-06-06 00:18:14,745 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 487.3ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:18:14,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57513 states. [2021-06-06 00:18:15,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57513 to 56897. [2021-06-06 00:18:15,712 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) [2021-06-06 00:18:15,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56897 states to 56897 states and 166373 transitions. [2021-06-06 00:18:15,841 INFO L78 Accepts]: Start accepts. Automaton has 56897 states and 166373 transitions. Word has length 40 [2021-06-06 00:18:15,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:15,841 INFO L482 AbstractCegarLoop]: Abstraction has 56897 states and 166373 transitions. [2021-06-06 00:18:15,841 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) [2021-06-06 00:18:15,841 INFO L276 IsEmpty]: Start isEmpty. Operand 56897 states and 166373 transitions. [2021-06-06 00:18:15,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:15,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:15,920 INFO L554 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] [2021-06-06 00:18:16,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:16,129 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:16,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:16,129 INFO L82 PathProgramCache]: Analyzing trace with hash -557051134, now seen corresponding path program 111 times [2021-06-06 00:18:16,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:16,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676784024] [2021-06-06 00:18:16,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:16,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:16,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:16,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676784024] [2021-06-06 00:18:16,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676784024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:16,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56180038] [2021-06-06 00:18:16,229 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 [2021-06-06 00:18:16,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-06 00:18:16,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:16,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:16,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:16,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56180038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:16,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:16,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-06 00:18:16,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884651398] [2021-06-06 00:18:16,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:18:16,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:16,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:18:16,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:18:16,439 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) [2021-06-06 00:18:17,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:17,140 INFO L93 Difference]: Finished difference Result 58288 states and 170073 transitions. [2021-06-06 00:18:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:18:17,141 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 [2021-06-06 00:18:17,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:17,245 INFO L225 Difference]: With dead ends: 58288 [2021-06-06 00:18:17,245 INFO L226 Difference]: Without dead ends: 58158 [2021-06-06 00:18:17,245 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:18:17,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58158 states. [2021-06-06 00:18:18,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58158 to 52473. [2021-06-06 00:18:18,206 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) [2021-06-06 00:18:18,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52473 states to 52473 states and 153279 transitions. [2021-06-06 00:18:18,323 INFO L78 Accepts]: Start accepts. Automaton has 52473 states and 153279 transitions. Word has length 40 [2021-06-06 00:18:18,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:18,323 INFO L482 AbstractCegarLoop]: Abstraction has 52473 states and 153279 transitions. [2021-06-06 00:18:18,323 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) [2021-06-06 00:18:18,324 INFO L276 IsEmpty]: Start isEmpty. Operand 52473 states and 153279 transitions. [2021-06-06 00:18:18,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:18,399 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:18,399 INFO L554 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] [2021-06-06 00:18:18,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-06 00:18:18,599 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:18,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:18,600 INFO L82 PathProgramCache]: Analyzing trace with hash -161255976, now seen corresponding path program 112 times [2021-06-06 00:18:18,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:18,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254401438] [2021-06-06 00:18:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:18,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:18,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254401438] [2021-06-06 00:18:18,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254401438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:18,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961424022] [2021-06-06 00:18:18,693 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 [2021-06-06 00:18:18,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:18:18,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:18,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:18,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:18,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961424022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:18,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:18,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-06 00:18:18,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522363337] [2021-06-06 00:18:18,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:18:18,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:18,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:18:18,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:18:18,896 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) [2021-06-06 00:18:19,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:19,271 INFO L93 Difference]: Finished difference Result 53321 states and 155327 transitions. [2021-06-06 00:18:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:18:19,272 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 [2021-06-06 00:18:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:19,643 INFO L225 Difference]: With dead ends: 53321 [2021-06-06 00:18:19,644 INFO L226 Difference]: Without dead ends: 53204 [2021-06-06 00:18:19,644 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 227.4ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:18:19,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53204 states. [2021-06-06 00:18:20,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53204 to 51075. [2021-06-06 00:18:20,354 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) [2021-06-06 00:18:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51075 states to 51075 states and 149154 transitions. [2021-06-06 00:18:20,746 INFO L78 Accepts]: Start accepts. Automaton has 51075 states and 149154 transitions. Word has length 40 [2021-06-06 00:18:20,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:20,746 INFO L482 AbstractCegarLoop]: Abstraction has 51075 states and 149154 transitions. [2021-06-06 00:18:20,746 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) [2021-06-06 00:18:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 51075 states and 149154 transitions. [2021-06-06 00:18:20,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:20,802 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:20,802 INFO L554 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] [2021-06-06 00:18:21,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:21,002 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:21,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:21,003 INFO L82 PathProgramCache]: Analyzing trace with hash 2036427680, now seen corresponding path program 113 times [2021-06-06 00:18:21,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:21,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794449005] [2021-06-06 00:18:21,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:21,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:21,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794449005] [2021-06-06 00:18:21,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794449005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:21,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919628443] [2021-06-06 00:18:21,115 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 [2021-06-06 00:18:21,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:18:21,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:21,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:21,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:21,359 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:21,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919628443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:21,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:21,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-06 00:18:21,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215784603] [2021-06-06 00:18:21,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:18:21,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:21,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:18:21,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:18:21,360 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) [2021-06-06 00:18:21,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:21,761 INFO L93 Difference]: Finished difference Result 53291 states and 155408 transitions. [2021-06-06 00:18:21,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:18:21,761 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 [2021-06-06 00:18:21,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:21,855 INFO L225 Difference]: With dead ends: 53291 [2021-06-06 00:18:21,855 INFO L226 Difference]: Without dead ends: 53215 [2021-06-06 00:18:21,855 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 269.7ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:18:21,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53215 states. [2021-06-06 00:18:22,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53215 to 50481. [2021-06-06 00:18:22,839 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) [2021-06-06 00:18:22,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50481 states to 50481 states and 147535 transitions. [2021-06-06 00:18:22,953 INFO L78 Accepts]: Start accepts. Automaton has 50481 states and 147535 transitions. Word has length 40 [2021-06-06 00:18:22,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:22,953 INFO L482 AbstractCegarLoop]: Abstraction has 50481 states and 147535 transitions. [2021-06-06 00:18:22,953 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) [2021-06-06 00:18:22,953 INFO L276 IsEmpty]: Start isEmpty. Operand 50481 states and 147535 transitions. [2021-06-06 00:18:23,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:23,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:23,012 INFO L554 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] [2021-06-06 00:18:23,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:23,213 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:23,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:23,213 INFO L82 PathProgramCache]: Analyzing trace with hash -711983976, now seen corresponding path program 114 times [2021-06-06 00:18:23,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:23,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778228523] [2021-06-06 00:18:23,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:18:23,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:23,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778228523] [2021-06-06 00:18:23,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778228523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:23,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581181053] [2021-06-06 00:18:23,332 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 [2021-06-06 00:18:23,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:18:23,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:23,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:23,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:23,554 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:23,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581181053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:23,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:23,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-06 00:18:23,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646215484] [2021-06-06 00:18:23,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:18:23,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:23,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:18:23,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:18:23,555 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) [2021-06-06 00:18:24,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:24,132 INFO L93 Difference]: Finished difference Result 51763 states and 151105 transitions. [2021-06-06 00:18:24,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:18:24,133 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 [2021-06-06 00:18:24,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:24,219 INFO L225 Difference]: With dead ends: 51763 [2021-06-06 00:18:24,219 INFO L226 Difference]: Without dead ends: 51687 [2021-06-06 00:18:24,220 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 247.9ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:18:24,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51687 states. [2021-06-06 00:18:25,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51687 to 51357. [2021-06-06 00:18:25,148 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) [2021-06-06 00:18:25,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51357 states to 51357 states and 150187 transitions. [2021-06-06 00:18:25,257 INFO L78 Accepts]: Start accepts. Automaton has 51357 states and 150187 transitions. Word has length 40 [2021-06-06 00:18:25,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:25,257 INFO L482 AbstractCegarLoop]: Abstraction has 51357 states and 150187 transitions. [2021-06-06 00:18:25,258 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) [2021-06-06 00:18:25,258 INFO L276 IsEmpty]: Start isEmpty. Operand 51357 states and 150187 transitions. [2021-06-06 00:18:25,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:25,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:25,318 INFO L554 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] [2021-06-06 00:18:25,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-06-06 00:18:25,518 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:25,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:25,519 INFO L82 PathProgramCache]: Analyzing trace with hash 748763352, now seen corresponding path program 115 times [2021-06-06 00:18:25,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:25,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024584007] [2021-06-06 00:18:25,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:25,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:25,649 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:25,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:25,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024584007] [2021-06-06 00:18:25,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024584007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:25,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507777997] [2021-06-06 00:18:25,650 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 [2021-06-06 00:18:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:25,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:25,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:25,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507777997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:25,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:25,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-06 00:18:25,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537962440] [2021-06-06 00:18:25,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:18:25,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:25,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:18:25,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:18:25,870 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) [2021-06-06 00:18:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:26,306 INFO L93 Difference]: Finished difference Result 51807 states and 151188 transitions. [2021-06-06 00:18:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:18:26,306 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 [2021-06-06 00:18:26,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:26,399 INFO L225 Difference]: With dead ends: 51807 [2021-06-06 00:18:26,399 INFO L226 Difference]: Without dead ends: 51731 [2021-06-06 00:18:26,399 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 264.8ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:18:26,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51731 states. [2021-06-06 00:18:27,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51731 to 51351. [2021-06-06 00:18:27,377 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) [2021-06-06 00:18:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51351 states to 51351 states and 150172 transitions. [2021-06-06 00:18:27,483 INFO L78 Accepts]: Start accepts. Automaton has 51351 states and 150172 transitions. Word has length 40 [2021-06-06 00:18:27,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:27,483 INFO L482 AbstractCegarLoop]: Abstraction has 51351 states and 150172 transitions. [2021-06-06 00:18:27,483 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) [2021-06-06 00:18:27,483 INFO L276 IsEmpty]: Start isEmpty. Operand 51351 states and 150172 transitions. [2021-06-06 00:18:27,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:27,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:27,542 INFO L554 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] [2021-06-06 00:18:27,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-06-06 00:18:27,742 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:27,743 INFO L82 PathProgramCache]: Analyzing trace with hash -960067266, now seen corresponding path program 116 times [2021-06-06 00:18:27,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:27,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842651909] [2021-06-06 00:18:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:28,121 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 10 [2021-06-06 00:18:28,142 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:28,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:28,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842651909] [2021-06-06 00:18:28,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842651909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:28,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669013059] [2021-06-06 00:18:28,142 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 [2021-06-06 00:18:28,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:18:28,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:28,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:18:28,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:28,406 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:28,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669013059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:28,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:28,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-06 00:18:28,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958629342] [2021-06-06 00:18:28,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:18:28,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:28,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:18:28,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:18:28,407 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) [2021-06-06 00:18:29,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:29,150 INFO L93 Difference]: Finished difference Result 60681 states and 177304 transitions. [2021-06-06 00:18:29,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:18:29,150 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 [2021-06-06 00:18:29,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:29,276 INFO L225 Difference]: With dead ends: 60681 [2021-06-06 00:18:29,276 INFO L226 Difference]: Without dead ends: 60579 [2021-06-06 00:18:29,276 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 764.4ms TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:18:29,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60579 states. [2021-06-06 00:18:30,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60579 to 60113. [2021-06-06 00:18:30,383 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) [2021-06-06 00:18:30,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60113 states to 60113 states and 175993 transitions. [2021-06-06 00:18:30,517 INFO L78 Accepts]: Start accepts. Automaton has 60113 states and 175993 transitions. Word has length 40 [2021-06-06 00:18:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:30,517 INFO L482 AbstractCegarLoop]: Abstraction has 60113 states and 175993 transitions. [2021-06-06 00:18:30,517 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) [2021-06-06 00:18:30,518 INFO L276 IsEmpty]: Start isEmpty. Operand 60113 states and 175993 transitions. [2021-06-06 00:18:30,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:30,597 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:30,597 INFO L554 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] [2021-06-06 00:18:30,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-06 00:18:30,798 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:30,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:30,798 INFO L82 PathProgramCache]: Analyzing trace with hash -988176450, now seen corresponding path program 117 times [2021-06-06 00:18:30,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:30,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106602321] [2021-06-06 00:18:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:30,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:30,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106602321] [2021-06-06 00:18:30,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106602321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:30,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809378113] [2021-06-06 00:18:30,878 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 [2021-06-06 00:18:30,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:18:30,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:30,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:30,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:31,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809378113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:31,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:31,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-06 00:18:31,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644620064] [2021-06-06 00:18:31,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:18:31,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:31,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:18:31,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:18:31,090 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) [2021-06-06 00:18:31,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:31,607 INFO L93 Difference]: Finished difference Result 60823 states and 177836 transitions. [2021-06-06 00:18:31,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:18:31,607 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 [2021-06-06 00:18:31,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:31,706 INFO L225 Difference]: With dead ends: 60823 [2021-06-06 00:18:31,707 INFO L226 Difference]: Without dead ends: 60707 [2021-06-06 00:18:31,707 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:18:31,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60707 states. [2021-06-06 00:18:32,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60707 to 60113. [2021-06-06 00:18:32,721 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) [2021-06-06 00:18:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60113 states to 60113 states and 175895 transitions. [2021-06-06 00:18:32,847 INFO L78 Accepts]: Start accepts. Automaton has 60113 states and 175895 transitions. Word has length 40 [2021-06-06 00:18:32,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:32,847 INFO L482 AbstractCegarLoop]: Abstraction has 60113 states and 175895 transitions. [2021-06-06 00:18:32,847 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) [2021-06-06 00:18:32,847 INFO L276 IsEmpty]: Start isEmpty. Operand 60113 states and 175895 transitions. [2021-06-06 00:18:32,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:32,926 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:32,926 INFO L554 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] [2021-06-06 00:18:33,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-06-06 00:18:33,127 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:33,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:33,127 INFO L82 PathProgramCache]: Analyzing trace with hash -851969850, now seen corresponding path program 118 times [2021-06-06 00:18:33,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:33,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888317484] [2021-06-06 00:18:33,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:33,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:33,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:33,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888317484] [2021-06-06 00:18:33,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888317484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:33,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769346957] [2021-06-06 00:18:33,220 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 [2021-06-06 00:18:33,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:18:33,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:33,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:33,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:33,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769346957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:33,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:33,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-06 00:18:33,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931398729] [2021-06-06 00:18:33,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:18:33,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:33,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:18:33,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:18:33,452 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) [2021-06-06 00:18:33,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:33,921 INFO L93 Difference]: Finished difference Result 64142 states and 187437 transitions. [2021-06-06 00:18:33,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:18:33,921 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 [2021-06-06 00:18:33,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:34,423 INFO L225 Difference]: With dead ends: 64142 [2021-06-06 00:18:34,423 INFO L226 Difference]: Without dead ends: 64018 [2021-06-06 00:18:34,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 231.0ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:18:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64018 states. [2021-06-06 00:18:35,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64018 to 63541. [2021-06-06 00:18:35,590 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) [2021-06-06 00:18:35,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63541 states to 63541 states and 185971 transitions. [2021-06-06 00:18:35,739 INFO L78 Accepts]: Start accepts. Automaton has 63541 states and 185971 transitions. Word has length 40 [2021-06-06 00:18:35,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:35,739 INFO L482 AbstractCegarLoop]: Abstraction has 63541 states and 185971 transitions. [2021-06-06 00:18:35,739 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) [2021-06-06 00:18:35,739 INFO L276 IsEmpty]: Start isEmpty. Operand 63541 states and 185971 transitions. [2021-06-06 00:18:35,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:35,826 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:35,826 INFO L554 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] [2021-06-06 00:18:36,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:36,027 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:36,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:36,027 INFO L82 PathProgramCache]: Analyzing trace with hash 2140494270, now seen corresponding path program 119 times [2021-06-06 00:18:36,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:36,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845942745] [2021-06-06 00:18:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:18:36,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:36,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845942745] [2021-06-06 00:18:36,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845942745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:36,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857901901] [2021-06-06 00:18:36,114 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 [2021-06-06 00:18:36,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:18:36,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:36,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:36,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:36,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857901901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:36,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:36,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-06 00:18:36,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087180706] [2021-06-06 00:18:36,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:18:36,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:36,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:18:36,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:18:36,351 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) [2021-06-06 00:18:36,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:36,781 INFO L93 Difference]: Finished difference Result 67150 states and 196442 transitions. [2021-06-06 00:18:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:18:36,781 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 [2021-06-06 00:18:36,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:36,893 INFO L225 Difference]: With dead ends: 67150 [2021-06-06 00:18:36,893 INFO L226 Difference]: Without dead ends: 67019 [2021-06-06 00:18:36,893 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 222.1ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:18:36,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67019 states. [2021-06-06 00:18:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67019 to 66567. [2021-06-06 00:18:38,093 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) [2021-06-06 00:18:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66567 states to 66567 states and 195004 transitions. [2021-06-06 00:18:38,571 INFO L78 Accepts]: Start accepts. Automaton has 66567 states and 195004 transitions. Word has length 40 [2021-06-06 00:18:38,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:38,571 INFO L482 AbstractCegarLoop]: Abstraction has 66567 states and 195004 transitions. [2021-06-06 00:18:38,571 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) [2021-06-06 00:18:38,571 INFO L276 IsEmpty]: Start isEmpty. Operand 66567 states and 195004 transitions. [2021-06-06 00:18:38,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:38,674 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:38,674 INFO L554 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] [2021-06-06 00:18:38,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:38,877 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:38,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:38,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1155037826, now seen corresponding path program 120 times [2021-06-06 00:18:38,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:38,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297579422] [2021-06-06 00:18:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:39,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:39,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297579422] [2021-06-06 00:18:39,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297579422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:39,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066306498] [2021-06-06 00:18:39,005 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 [2021-06-06 00:18:39,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:18:39,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:39,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:39,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:39,237 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:39,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066306498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:39,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:39,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-06 00:18:39,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7264836] [2021-06-06 00:18:39,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:18:39,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:39,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:18:39,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:18:39,238 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) [2021-06-06 00:18:39,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:39,770 INFO L93 Difference]: Finished difference Result 67138 states and 196301 transitions. [2021-06-06 00:18:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:18:39,771 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 [2021-06-06 00:18:39,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:39,887 INFO L225 Difference]: With dead ends: 67138 [2021-06-06 00:18:39,887 INFO L226 Difference]: Without dead ends: 67008 [2021-06-06 00:18:39,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 253.8ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:18:39,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67008 states. [2021-06-06 00:18:41,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67008 to 66551. [2021-06-06 00:18:41,144 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) [2021-06-06 00:18:41,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66551 states to 66551 states and 194960 transitions. [2021-06-06 00:18:41,629 INFO L78 Accepts]: Start accepts. Automaton has 66551 states and 194960 transitions. Word has length 40 [2021-06-06 00:18:41,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:41,630 INFO L482 AbstractCegarLoop]: Abstraction has 66551 states and 194960 transitions. [2021-06-06 00:18:41,630 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) [2021-06-06 00:18:41,630 INFO L276 IsEmpty]: Start isEmpty. Operand 66551 states and 194960 transitions. [2021-06-06 00:18:41,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:41,730 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:41,730 INFO L554 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] [2021-06-06 00:18:41,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:41,931 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:41,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:41,931 INFO L82 PathProgramCache]: Analyzing trace with hash 2930118, now seen corresponding path program 121 times [2021-06-06 00:18:41,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:41,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34665590] [2021-06-06 00:18:41,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:18:42,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:42,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34665590] [2021-06-06 00:18:42,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34665590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:42,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236754408] [2021-06-06 00:18:42,020 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 [2021-06-06 00:18:42,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:42,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:42,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:42,234 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:42,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236754408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:42,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:42,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-06 00:18:42,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178386428] [2021-06-06 00:18:42,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:18:42,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:42,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:18:42,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:18:42,235 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) [2021-06-06 00:18:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:42,641 INFO L93 Difference]: Finished difference Result 68643 states and 200950 transitions. [2021-06-06 00:18:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:18:42,641 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 [2021-06-06 00:18:42,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:42,762 INFO L225 Difference]: With dead ends: 68643 [2021-06-06 00:18:42,762 INFO L226 Difference]: Without dead ends: 68519 [2021-06-06 00:18:42,763 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:18:42,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68519 states. [2021-06-06 00:18:43,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68519 to 68109. [2021-06-06 00:18:43,935 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) [2021-06-06 00:18:44,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68109 states to 68109 states and 199661 transitions. [2021-06-06 00:18:44,077 INFO L78 Accepts]: Start accepts. Automaton has 68109 states and 199661 transitions. Word has length 40 [2021-06-06 00:18:44,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:44,077 INFO L482 AbstractCegarLoop]: Abstraction has 68109 states and 199661 transitions. [2021-06-06 00:18:44,077 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) [2021-06-06 00:18:44,077 INFO L276 IsEmpty]: Start isEmpty. Operand 68109 states and 199661 transitions. [2021-06-06 00:18:44,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:44,166 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:44,166 INFO L554 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] [2021-06-06 00:18:44,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-06 00:18:44,367 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:44,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:44,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1002365318, now seen corresponding path program 122 times [2021-06-06 00:18:44,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:44,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535962098] [2021-06-06 00:18:44,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:44,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:44,636 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-06 00:18:44,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:18:44,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:44,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535962098] [2021-06-06 00:18:44,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535962098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:44,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160370332] [2021-06-06 00:18:44,737 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 [2021-06-06 00:18:44,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:18:44,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:44,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:44,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:44,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160370332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:44,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:44,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-06 00:18:44,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736802990] [2021-06-06 00:18:44,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:18:44,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:44,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:18:44,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:18:44,955 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) [2021-06-06 00:18:45,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:45,467 INFO L93 Difference]: Finished difference Result 68644 states and 200867 transitions. [2021-06-06 00:18:45,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:18:45,467 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 [2021-06-06 00:18:45,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:45,590 INFO L225 Difference]: With dead ends: 68644 [2021-06-06 00:18:45,590 INFO L226 Difference]: Without dead ends: 68514 [2021-06-06 00:18:45,590 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 509.8ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:18:45,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68514 states. [2021-06-06 00:18:46,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68514 to 68093. [2021-06-06 00:18:46,848 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) [2021-06-06 00:18:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68093 states to 68093 states and 199617 transitions. [2021-06-06 00:18:46,998 INFO L78 Accepts]: Start accepts. Automaton has 68093 states and 199617 transitions. Word has length 40 [2021-06-06 00:18:46,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:46,999 INFO L482 AbstractCegarLoop]: Abstraction has 68093 states and 199617 transitions. [2021-06-06 00:18:46,999 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) [2021-06-06 00:18:46,999 INFO L276 IsEmpty]: Start isEmpty. Operand 68093 states and 199617 transitions. [2021-06-06 00:18:47,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:47,096 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:47,096 INFO L554 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] [2021-06-06 00:18:47,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:47,296 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:47,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1831854650, now seen corresponding path program 123 times [2021-06-06 00:18:47,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:47,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519751173] [2021-06-06 00:18:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:47,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:47,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519751173] [2021-06-06 00:18:47,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519751173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:47,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063149681] [2021-06-06 00:18:47,421 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 [2021-06-06 00:18:47,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:18:47,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:47,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:47,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:47,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063149681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:47,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:47,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:18:47,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932171478] [2021-06-06 00:18:47,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:18:47,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:47,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:18:47,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:18:47,940 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) [2021-06-06 00:18:48,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:48,463 INFO L93 Difference]: Finished difference Result 68603 states and 200761 transitions. [2021-06-06 00:18:48,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:18:48,464 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 [2021-06-06 00:18:48,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:48,595 INFO L225 Difference]: With dead ends: 68603 [2021-06-06 00:18:48,595 INFO L226 Difference]: Without dead ends: 68527 [2021-06-06 00:18:48,595 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:18:48,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68527 states. [2021-06-06 00:18:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68527 to 68087. [2021-06-06 00:18:49,746 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) [2021-06-06 00:18:49,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68087 states to 68087 states and 199602 transitions. [2021-06-06 00:18:49,913 INFO L78 Accepts]: Start accepts. Automaton has 68087 states and 199602 transitions. Word has length 40 [2021-06-06 00:18:49,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:49,913 INFO L482 AbstractCegarLoop]: Abstraction has 68087 states and 199602 transitions. [2021-06-06 00:18:49,913 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) [2021-06-06 00:18:49,913 INFO L276 IsEmpty]: Start isEmpty. Operand 68087 states and 199602 transitions. [2021-06-06 00:18:50,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:50,012 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:50,013 INFO L554 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] [2021-06-06 00:18:50,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-06 00:18:50,221 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:50,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:50,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1497503238, now seen corresponding path program 124 times [2021-06-06 00:18:50,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:50,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561445936] [2021-06-06 00:18:50,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:50,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:50,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561445936] [2021-06-06 00:18:50,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561445936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:50,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814131047] [2021-06-06 00:18:50,361 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 [2021-06-06 00:18:50,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:18:50,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:50,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:50,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:50,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814131047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:50,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:50,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-06 00:18:50,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994046510] [2021-06-06 00:18:50,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:18:50,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:50,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:18:50,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:18:50,562 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) [2021-06-06 00:18:51,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:51,211 INFO L93 Difference]: Finished difference Result 90862 states and 266329 transitions. [2021-06-06 00:18:51,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:18:51,212 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 [2021-06-06 00:18:51,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:51,361 INFO L225 Difference]: With dead ends: 90862 [2021-06-06 00:18:51,361 INFO L226 Difference]: Without dead ends: 90825 [2021-06-06 00:18:51,361 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:18:51,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90825 states. [2021-06-06 00:18:52,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90825 to 68095. [2021-06-06 00:18:52,750 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) [2021-06-06 00:18:52,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68095 states to 68095 states and 199622 transitions. [2021-06-06 00:18:52,898 INFO L78 Accepts]: Start accepts. Automaton has 68095 states and 199622 transitions. Word has length 40 [2021-06-06 00:18:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:52,898 INFO L482 AbstractCegarLoop]: Abstraction has 68095 states and 199622 transitions. [2021-06-06 00:18:52,898 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) [2021-06-06 00:18:52,898 INFO L276 IsEmpty]: Start isEmpty. Operand 68095 states and 199622 transitions. [2021-06-06 00:18:53,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:53,004 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:53,004 INFO L554 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] [2021-06-06 00:18:53,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:53,204 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:53,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:53,205 INFO L82 PathProgramCache]: Analyzing trace with hash -627011198, now seen corresponding path program 125 times [2021-06-06 00:18:53,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:53,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861162208] [2021-06-06 00:18:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:53,328 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:53,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:53,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861162208] [2021-06-06 00:18:53,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861162208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:53,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846289868] [2021-06-06 00:18:53,329 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 [2021-06-06 00:18:53,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:18:53,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:53,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:18:53,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:53,540 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:53,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846289868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:53,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:53,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-06 00:18:53,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133408361] [2021-06-06 00:18:53,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:18:53,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:53,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:18:53,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:18:53,541 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) [2021-06-06 00:18:54,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:54,330 INFO L93 Difference]: Finished difference Result 90806 states and 266237 transitions. [2021-06-06 00:18:54,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:18:54,331 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 [2021-06-06 00:18:54,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:54,482 INFO L225 Difference]: With dead ends: 90806 [2021-06-06 00:18:54,482 INFO L226 Difference]: Without dead ends: 90769 [2021-06-06 00:18:54,483 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:18:54,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90769 states. [2021-06-06 00:18:55,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90769 to 68117. [2021-06-06 00:18:55,823 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) [2021-06-06 00:18:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68117 states to 68117 states and 199687 transitions. [2021-06-06 00:18:55,989 INFO L78 Accepts]: Start accepts. Automaton has 68117 states and 199687 transitions. Word has length 40 [2021-06-06 00:18:55,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:55,990 INFO L482 AbstractCegarLoop]: Abstraction has 68117 states and 199687 transitions. [2021-06-06 00:18:55,990 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) [2021-06-06 00:18:55,990 INFO L276 IsEmpty]: Start isEmpty. Operand 68117 states and 199687 transitions. [2021-06-06 00:18:56,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:56,085 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:56,085 INFO L554 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] [2021-06-06 00:18:56,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:56,286 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:56,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:56,286 INFO L82 PathProgramCache]: Analyzing trace with hash 2073309766, now seen corresponding path program 126 times [2021-06-06 00:18:56,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:56,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826108812] [2021-06-06 00:18:56,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:18:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:56,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:18:56,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826108812] [2021-06-06 00:18:56,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826108812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:56,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957460913] [2021-06-06 00:18:56,408 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 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 [2021-06-06 00:18:56,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:18:56,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:18:56,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:18:56,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:18:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:18:56,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957460913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:18:56,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:18:56,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-06 00:18:56,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890272955] [2021-06-06 00:18:56,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:18:56,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:18:56,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:18:56,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:18:56,633 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) [2021-06-06 00:18:57,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:18:57,846 INFO L93 Difference]: Finished difference Result 92902 states and 271948 transitions. [2021-06-06 00:18:57,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:18:57,846 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 [2021-06-06 00:18:57,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:18:58,026 INFO L225 Difference]: With dead ends: 92902 [2021-06-06 00:18:58,026 INFO L226 Difference]: Without dead ends: 92828 [2021-06-06 00:18:58,026 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 824.4ms TimeCoverageRelationStatistics Valid=134, Invalid=1272, Unknown=0, NotChecked=0, Total=1406 [2021-06-06 00:18:58,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92828 states. [2021-06-06 00:18:59,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92828 to 69669. [2021-06-06 00:18:59,517 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) [2021-06-06 00:18:59,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69669 states to 69669 states and 204255 transitions. [2021-06-06 00:18:59,673 INFO L78 Accepts]: Start accepts. Automaton has 69669 states and 204255 transitions. Word has length 40 [2021-06-06 00:18:59,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:18:59,673 INFO L482 AbstractCegarLoop]: Abstraction has 69669 states and 204255 transitions. [2021-06-06 00:18:59,673 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) [2021-06-06 00:18:59,673 INFO L276 IsEmpty]: Start isEmpty. Operand 69669 states and 204255 transitions. [2021-06-06 00:18:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:18:59,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:18:59,770 INFO L554 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] [2021-06-06 00:18:59,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:18:59,970 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:18:59,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:18:59,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1408085314, now seen corresponding path program 127 times [2021-06-06 00:18:59,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:18:59,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379167157] [2021-06-06 00:18:59,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:18:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:00,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:00,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379167157] [2021-06-06 00:19:00,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379167157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:00,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542453401] [2021-06-06 00:19:00,078 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 [2021-06-06 00:19:00,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:00,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:00,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:00,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542453401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:00,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:00,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-06 00:19:00,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936405471] [2021-06-06 00:19:00,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:19:00,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:00,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:19:00,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:19:00,263 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) [2021-06-06 00:19:01,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:01,241 INFO L93 Difference]: Finished difference Result 95491 states and 279885 transitions. [2021-06-06 00:19:01,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:19:01,241 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 [2021-06-06 00:19:01,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:01,423 INFO L225 Difference]: With dead ends: 95491 [2021-06-06 00:19:01,423 INFO L226 Difference]: Without dead ends: 95385 [2021-06-06 00:19:01,423 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 239.4ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:19:01,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95385 states. [2021-06-06 00:19:02,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95385 to 72491. [2021-06-06 00:19:02,835 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) [2021-06-06 00:19:02,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72491 states to 72491 states and 212576 transitions. [2021-06-06 00:19:02,993 INFO L78 Accepts]: Start accepts. Automaton has 72491 states and 212576 transitions. Word has length 40 [2021-06-06 00:19:02,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:02,993 INFO L482 AbstractCegarLoop]: Abstraction has 72491 states and 212576 transitions. [2021-06-06 00:19:02,993 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) [2021-06-06 00:19:02,993 INFO L276 IsEmpty]: Start isEmpty. Operand 72491 states and 212576 transitions. [2021-06-06 00:19:03,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:19:03,089 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:03,089 INFO L554 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] [2021-06-06 00:19:03,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-06-06 00:19:03,290 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:03,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:03,290 INFO L82 PathProgramCache]: Analyzing trace with hash -346917946, now seen corresponding path program 128 times [2021-06-06 00:19:03,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:03,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472117057] [2021-06-06 00:19:03,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:03,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:03,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472117057] [2021-06-06 00:19:03,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472117057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:03,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241172017] [2021-06-06 00:19:03,400 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 [2021-06-06 00:19:03,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:19:03,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:03,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:19:03,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:03,995 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:03,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241172017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:03,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:03,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-06 00:19:03,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930092258] [2021-06-06 00:19:03,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:19:03,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:03,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:19:03,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:19:03,996 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) [2021-06-06 00:19:05,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:05,131 INFO L93 Difference]: Finished difference Result 100288 states and 293712 transitions. [2021-06-06 00:19:05,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:19:05,132 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 [2021-06-06 00:19:05,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:05,327 INFO L225 Difference]: With dead ends: 100288 [2021-06-06 00:19:05,327 INFO L226 Difference]: Without dead ends: 100151 [2021-06-06 00:19:05,328 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 613.4ms TimeCoverageRelationStatistics Valid=196, Invalid=1874, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:19:05,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100151 states. [2021-06-06 00:19:07,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100151 to 73759. [2021-06-06 00:19:07,196 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) [2021-06-06 00:19:07,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73759 states to 73759 states and 216344 transitions. [2021-06-06 00:19:07,370 INFO L78 Accepts]: Start accepts. Automaton has 73759 states and 216344 transitions. Word has length 40 [2021-06-06 00:19:07,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:07,370 INFO L482 AbstractCegarLoop]: Abstraction has 73759 states and 216344 transitions. [2021-06-06 00:19:07,370 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) [2021-06-06 00:19:07,370 INFO L276 IsEmpty]: Start isEmpty. Operand 73759 states and 216344 transitions. [2021-06-06 00:19:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:19:07,480 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:07,480 INFO L554 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] [2021-06-06 00:19:07,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-06-06 00:19:07,680 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:07,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2017252144, now seen corresponding path program 129 times [2021-06-06 00:19:07,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:07,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152072710] [2021-06-06 00:19:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:07,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:07,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152072710] [2021-06-06 00:19:07,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152072710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:07,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722239662] [2021-06-06 00:19:07,806 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 [2021-06-06 00:19:07,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:19:07,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:07,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:07,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:08,013 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:08,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722239662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:08,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:08,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-06-06 00:19:08,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321231193] [2021-06-06 00:19:08,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:19:08,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:08,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:19:08,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:19:08,014 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) [2021-06-06 00:19:08,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:08,478 INFO L93 Difference]: Finished difference Result 78859 states and 230387 transitions. [2021-06-06 00:19:08,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:19:08,478 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 [2021-06-06 00:19:08,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:08,629 INFO L225 Difference]: With dead ends: 78859 [2021-06-06 00:19:08,629 INFO L226 Difference]: Without dead ends: 78785 [2021-06-06 00:19:08,629 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 242.3ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:19:08,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78785 states. [2021-06-06 00:19:10,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78785 to 75025. [2021-06-06 00:19:10,434 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) [2021-06-06 00:19:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75025 states to 75025 states and 220095 transitions. [2021-06-06 00:19:10,617 INFO L78 Accepts]: Start accepts. Automaton has 75025 states and 220095 transitions. Word has length 40 [2021-06-06 00:19:10,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:10,617 INFO L482 AbstractCegarLoop]: Abstraction has 75025 states and 220095 transitions. [2021-06-06 00:19:10,617 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) [2021-06-06 00:19:10,617 INFO L276 IsEmpty]: Start isEmpty. Operand 75025 states and 220095 transitions. [2021-06-06 00:19:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:19:10,720 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:10,720 INFO L554 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] [2021-06-06 00:19:10,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-06 00:19:10,921 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:10,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:10,921 INFO L82 PathProgramCache]: Analyzing trace with hash -727268640, now seen corresponding path program 130 times [2021-06-06 00:19:10,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:10,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616300540] [2021-06-06 00:19:10,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:11,048 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:11,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:11,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616300540] [2021-06-06 00:19:11,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616300540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:11,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233936020] [2021-06-06 00:19:11,048 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 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 [2021-06-06 00:19:11,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:19:11,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:11,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:11,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:11,278 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:11,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233936020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:11,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:11,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-06 00:19:11,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460342199] [2021-06-06 00:19:11,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:19:11,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:11,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:19:11,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:19:11,279 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) [2021-06-06 00:19:11,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:11,800 INFO L93 Difference]: Finished difference Result 80009 states and 233828 transitions. [2021-06-06 00:19:11,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:19:11,800 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 [2021-06-06 00:19:11,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:11,934 INFO L225 Difference]: With dead ends: 80009 [2021-06-06 00:19:11,935 INFO L226 Difference]: Without dead ends: 79935 [2021-06-06 00:19:11,935 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:19:12,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79935 states. [2021-06-06 00:19:13,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79935 to 74919. [2021-06-06 00:19:13,765 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) [2021-06-06 00:19:13,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74919 states to 74919 states and 219816 transitions. [2021-06-06 00:19:13,920 INFO L78 Accepts]: Start accepts. Automaton has 74919 states and 219816 transitions. Word has length 40 [2021-06-06 00:19:13,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:13,920 INFO L482 AbstractCegarLoop]: Abstraction has 74919 states and 219816 transitions. [2021-06-06 00:19:13,920 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) [2021-06-06 00:19:13,920 INFO L276 IsEmpty]: Start isEmpty. Operand 74919 states and 219816 transitions. [2021-06-06 00:19:14,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:19:14,009 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:14,009 INFO L554 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] [2021-06-06 00:19:14,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:14,209 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:14,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:14,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1155007878, now seen corresponding path program 131 times [2021-06-06 00:19:14,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:14,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700668732] [2021-06-06 00:19:14,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:14,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:14,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700668732] [2021-06-06 00:19:14,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700668732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:14,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42094456] [2021-06-06 00:19:14,306 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 [2021-06-06 00:19:14,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:19:14,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:14,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:14,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:14,500 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:14,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42094456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:14,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:14,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-06 00:19:14,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78567010] [2021-06-06 00:19:14,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:19:14,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:14,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:19:14,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:19:14,501 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) [2021-06-06 00:19:15,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:15,101 INFO L93 Difference]: Finished difference Result 81553 states and 238414 transitions. [2021-06-06 00:19:15,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:19:15,101 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 [2021-06-06 00:19:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:15,243 INFO L225 Difference]: With dead ends: 81553 [2021-06-06 00:19:15,243 INFO L226 Difference]: Without dead ends: 81439 [2021-06-06 00:19:15,243 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:19:15,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81439 states. [2021-06-06 00:19:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81439 to 77163. [2021-06-06 00:19:17,024 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) [2021-06-06 00:19:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77163 states to 77163 states and 226554 transitions. [2021-06-06 00:19:17,218 INFO L78 Accepts]: Start accepts. Automaton has 77163 states and 226554 transitions. Word has length 40 [2021-06-06 00:19:17,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:17,218 INFO L482 AbstractCegarLoop]: Abstraction has 77163 states and 226554 transitions. [2021-06-06 00:19:17,218 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) [2021-06-06 00:19:17,218 INFO L276 IsEmpty]: Start isEmpty. Operand 77163 states and 226554 transitions. [2021-06-06 00:19:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:19:17,331 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:17,331 INFO L554 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] [2021-06-06 00:19:17,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-06 00:19:17,531 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:17,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:17,532 INFO L82 PathProgramCache]: Analyzing trace with hash -862357216, now seen corresponding path program 132 times [2021-06-06 00:19:17,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:17,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360783771] [2021-06-06 00:19:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:17,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:17,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:17,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360783771] [2021-06-06 00:19:17,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360783771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:17,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411239606] [2021-06-06 00:19:17,638 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 [2021-06-06 00:19:17,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:19:17,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:17,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:17,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:17,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411239606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:17,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:17,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-06 00:19:17,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365587177] [2021-06-06 00:19:17,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:19:17,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:17,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:19:17,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:19:17,852 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) [2021-06-06 00:19:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:18,518 INFO L93 Difference]: Finished difference Result 86206 states and 252453 transitions. [2021-06-06 00:19:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:19:18,519 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 [2021-06-06 00:19:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:18,665 INFO L225 Difference]: With dead ends: 86206 [2021-06-06 00:19:18,665 INFO L226 Difference]: Without dead ends: 86116 [2021-06-06 00:19:18,665 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 271.4ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:19:18,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86116 states. [2021-06-06 00:19:20,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86116 to 81055. [2021-06-06 00:19:20,548 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) [2021-06-06 00:19:20,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81055 states to 81055 states and 238374 transitions. [2021-06-06 00:19:20,825 INFO L78 Accepts]: Start accepts. Automaton has 81055 states and 238374 transitions. Word has length 40 [2021-06-06 00:19:20,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:20,825 INFO L482 AbstractCegarLoop]: Abstraction has 81055 states and 238374 transitions. [2021-06-06 00:19:20,825 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) [2021-06-06 00:19:20,825 INFO L276 IsEmpty]: Start isEmpty. Operand 81055 states and 238374 transitions. [2021-06-06 00:19:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:19:20,959 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:20,959 INFO L554 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] [2021-06-06 00:19:21,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-06 00:19:21,173 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:21,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:21,173 INFO L82 PathProgramCache]: Analyzing trace with hash -981440228, now seen corresponding path program 133 times [2021-06-06 00:19:21,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:21,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392757211] [2021-06-06 00:19:21,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:19:21,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:21,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392757211] [2021-06-06 00:19:21,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392757211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:21,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235323310] [2021-06-06 00:19:21,312 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 [2021-06-06 00:19:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:21,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:21,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:21,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235323310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:21,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:21,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-06-06 00:19:21,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319819251] [2021-06-06 00:19:21,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:19:21,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:21,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:19:21,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:19:21,539 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) [2021-06-06 00:19:22,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:22,146 INFO L93 Difference]: Finished difference Result 86179 states and 252372 transitions. [2021-06-06 00:19:22,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:19:22,146 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 [2021-06-06 00:19:22,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:22,308 INFO L225 Difference]: With dead ends: 86179 [2021-06-06 00:19:22,308 INFO L226 Difference]: Without dead ends: 86059 [2021-06-06 00:19:22,308 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 312.2ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:19:22,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86059 states. [2021-06-06 00:19:23,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86059 to 80643. [2021-06-06 00:19:24,010 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) [2021-06-06 00:19:24,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80643 states to 80643 states and 236742 transitions. [2021-06-06 00:19:24,193 INFO L78 Accepts]: Start accepts. Automaton has 80643 states and 236742 transitions. Word has length 40 [2021-06-06 00:19:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:24,193 INFO L482 AbstractCegarLoop]: Abstraction has 80643 states and 236742 transitions. [2021-06-06 00:19:24,193 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) [2021-06-06 00:19:24,193 INFO L276 IsEmpty]: Start isEmpty. Operand 80643 states and 236742 transitions. [2021-06-06 00:19:24,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:19:24,318 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:24,318 INFO L554 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] [2021-06-06 00:19:24,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-06 00:19:24,518 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:24,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:24,519 INFO L82 PathProgramCache]: Analyzing trace with hash -837152646, now seen corresponding path program 134 times [2021-06-06 00:19:24,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:24,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683502237] [2021-06-06 00:19:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:24,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:24,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683502237] [2021-06-06 00:19:24,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683502237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:24,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098321729] [2021-06-06 00:19:24,631 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 [2021-06-06 00:19:24,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:19:24,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:24,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:19:24,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:24,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098321729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:24,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:24,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-06-06 00:19:24,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708172019] [2021-06-06 00:19:24,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:19:24,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:24,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:19:24,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:19:24,857 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) [2021-06-06 00:19:25,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:25,654 INFO L93 Difference]: Finished difference Result 84857 states and 247966 transitions. [2021-06-06 00:19:25,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:19:25,654 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 [2021-06-06 00:19:25,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:26,155 INFO L225 Difference]: With dead ends: 84857 [2021-06-06 00:19:26,155 INFO L226 Difference]: Without dead ends: 84733 [2021-06-06 00:19:26,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 475.8ms TimeCoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:19:26,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84733 states. [2021-06-06 00:19:27,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84733 to 77769. [2021-06-06 00:19:27,422 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) [2021-06-06 00:19:27,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77769 states to 77769 states and 228273 transitions. [2021-06-06 00:19:27,594 INFO L78 Accepts]: Start accepts. Automaton has 77769 states and 228273 transitions. Word has length 40 [2021-06-06 00:19:27,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:27,594 INFO L482 AbstractCegarLoop]: Abstraction has 77769 states and 228273 transitions. [2021-06-06 00:19:27,594 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) [2021-06-06 00:19:27,594 INFO L276 IsEmpty]: Start isEmpty. Operand 77769 states and 228273 transitions. [2021-06-06 00:19:27,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:19:27,703 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:27,703 INFO L554 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] [2021-06-06 00:19:27,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-06-06 00:19:27,903 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:27,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:27,904 INFO L82 PathProgramCache]: Analyzing trace with hash 762977632, now seen corresponding path program 135 times [2021-06-06 00:19:27,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:27,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247881665] [2021-06-06 00:19:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:27,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:28,027 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:28,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:28,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247881665] [2021-06-06 00:19:28,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247881665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:28,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311301199] [2021-06-06 00:19:28,027 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 [2021-06-06 00:19:28,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:19:28,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:28,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:28,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:28,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311301199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:28,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:28,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-06-06 00:19:28,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154039012] [2021-06-06 00:19:28,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:19:28,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:28,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:19:28,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:19:28,237 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) [2021-06-06 00:19:28,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:28,737 INFO L93 Difference]: Finished difference Result 81477 states and 238950 transitions. [2021-06-06 00:19:28,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:19:28,738 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 [2021-06-06 00:19:28,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:28,875 INFO L225 Difference]: With dead ends: 81477 [2021-06-06 00:19:28,875 INFO L226 Difference]: Without dead ends: 81403 [2021-06-06 00:19:28,876 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:19:29,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81403 states. [2021-06-06 00:19:30,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81403 to 81021. [2021-06-06 00:19:30,587 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) [2021-06-06 00:19:30,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81021 states to 81021 states and 237921 transitions. [2021-06-06 00:19:30,769 INFO L78 Accepts]: Start accepts. Automaton has 81021 states and 237921 transitions. Word has length 40 [2021-06-06 00:19:30,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:30,769 INFO L482 AbstractCegarLoop]: Abstraction has 81021 states and 237921 transitions. [2021-06-06 00:19:30,769 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) [2021-06-06 00:19:30,769 INFO L276 IsEmpty]: Start isEmpty. Operand 81021 states and 237921 transitions. [2021-06-06 00:19:30,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:19:30,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:30,880 INFO L554 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] [2021-06-06 00:19:31,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-06 00:19:31,080 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:31,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:31,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1088400518, now seen corresponding path program 136 times [2021-06-06 00:19:31,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:31,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893053855] [2021-06-06 00:19:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:31,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:31,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893053855] [2021-06-06 00:19:31,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893053855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:31,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208483127] [2021-06-06 00:19:31,192 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 [2021-06-06 00:19:31,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:19:31,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:31,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:31,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:31,391 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:31,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208483127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:31,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:31,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-06-06 00:19:31,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710129513] [2021-06-06 00:19:31,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:19:31,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:31,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:19:31,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:19:31,392 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) [2021-06-06 00:19:31,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:31,931 INFO L93 Difference]: Finished difference Result 83181 states and 243998 transitions. [2021-06-06 00:19:31,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:19:31,931 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 [2021-06-06 00:19:31,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:32,070 INFO L225 Difference]: With dead ends: 83181 [2021-06-06 00:19:32,070 INFO L226 Difference]: Without dead ends: 83107 [2021-06-06 00:19:32,070 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:19:32,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83107 states. [2021-06-06 00:19:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83107 to 79989. [2021-06-06 00:19:33,755 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) [2021-06-06 00:19:33,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79989 states to 79989 states and 234989 transitions. [2021-06-06 00:19:33,927 INFO L78 Accepts]: Start accepts. Automaton has 79989 states and 234989 transitions. Word has length 40 [2021-06-06 00:19:33,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:33,928 INFO L482 AbstractCegarLoop]: Abstraction has 79989 states and 234989 transitions. [2021-06-06 00:19:33,928 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) [2021-06-06 00:19:33,928 INFO L276 IsEmpty]: Start isEmpty. Operand 79989 states and 234989 transitions. [2021-06-06 00:19:34,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:19:34,035 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:34,035 INFO L554 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] [2021-06-06 00:19:34,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:34,235 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:34,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:34,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1493177376, now seen corresponding path program 137 times [2021-06-06 00:19:34,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:34,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409700334] [2021-06-06 00:19:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:34,321 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:34,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:34,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409700334] [2021-06-06 00:19:34,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409700334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:34,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192669860] [2021-06-06 00:19:34,322 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 [2021-06-06 00:19:34,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:19:34,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:34,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:34,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:34,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192669860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:34,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:34,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-06 00:19:34,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949719661] [2021-06-06 00:19:34,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:19:34,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:34,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:19:34,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:19:34,520 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) [2021-06-06 00:19:35,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:35,001 INFO L93 Difference]: Finished difference Result 83703 states and 245487 transitions. [2021-06-06 00:19:35,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:19:35,001 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 [2021-06-06 00:19:35,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:35,153 INFO L225 Difference]: With dead ends: 83703 [2021-06-06 00:19:35,153 INFO L226 Difference]: Without dead ends: 83589 [2021-06-06 00:19:35,154 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 223.9ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:19:35,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83589 states. [2021-06-06 00:19:36,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83589 to 79601. [2021-06-06 00:19:36,959 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) [2021-06-06 00:19:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79601 states to 79601 states and 233969 transitions. [2021-06-06 00:19:37,137 INFO L78 Accepts]: Start accepts. Automaton has 79601 states and 233969 transitions. Word has length 40 [2021-06-06 00:19:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:37,137 INFO L482 AbstractCegarLoop]: Abstraction has 79601 states and 233969 transitions. [2021-06-06 00:19:37,137 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) [2021-06-06 00:19:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 79601 states and 233969 transitions. [2021-06-06 00:19:37,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:19:37,250 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:37,250 INFO L554 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] [2021-06-06 00:19:37,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-06 00:19:37,451 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:37,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:37,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1063230778, now seen corresponding path program 138 times [2021-06-06 00:19:37,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:37,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239607095] [2021-06-06 00:19:37,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:37,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:37,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:37,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239607095] [2021-06-06 00:19:37,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239607095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:37,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124346988] [2021-06-06 00:19:37,540 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 [2021-06-06 00:19:37,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:19:37,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:37,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:37,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:37,741 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:37,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124346988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:37,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:37,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-06 00:19:37,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686914921] [2021-06-06 00:19:37,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:19:37,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:37,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:19:37,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:19:37,742 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) [2021-06-06 00:19:38,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:38,271 INFO L93 Difference]: Finished difference Result 84051 states and 247089 transitions. [2021-06-06 00:19:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:19:38,271 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 [2021-06-06 00:19:38,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:38,416 INFO L225 Difference]: With dead ends: 84051 [2021-06-06 00:19:38,416 INFO L226 Difference]: Without dead ends: 83961 [2021-06-06 00:19:38,417 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 236.0ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:19:38,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83961 states. [2021-06-06 00:19:40,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83961 to 82811. [2021-06-06 00:19:40,229 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) [2021-06-06 00:19:40,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82811 states to 82811 states and 243756 transitions. [2021-06-06 00:19:40,436 INFO L78 Accepts]: Start accepts. Automaton has 82811 states and 243756 transitions. Word has length 40 [2021-06-06 00:19:40,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:40,437 INFO L482 AbstractCegarLoop]: Abstraction has 82811 states and 243756 transitions. [2021-06-06 00:19:40,437 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) [2021-06-06 00:19:40,437 INFO L276 IsEmpty]: Start isEmpty. Operand 82811 states and 243756 transitions. [2021-06-06 00:19:40,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:19:40,547 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:40,547 INFO L554 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] [2021-06-06 00:19:40,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-06 00:19:40,748 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:40,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:40,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1182313790, now seen corresponding path program 139 times [2021-06-06 00:19:40,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:40,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288641658] [2021-06-06 00:19:40,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:40,834 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:19:40,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:40,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288641658] [2021-06-06 00:19:40,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288641658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:40,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111566986] [2021-06-06 00:19:40,834 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 [2021-06-06 00:19:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:40,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:40,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:41,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111566986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:41,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:41,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-06-06 00:19:41,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511160767] [2021-06-06 00:19:41,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:19:41,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:41,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:19:41,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:19:41,038 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) [2021-06-06 00:19:41,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:41,485 INFO L93 Difference]: Finished difference Result 84018 states and 247010 transitions. [2021-06-06 00:19:41,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:19:41,485 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 [2021-06-06 00:19:41,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:41,631 INFO L225 Difference]: With dead ends: 84018 [2021-06-06 00:19:41,632 INFO L226 Difference]: Without dead ends: 83902 [2021-06-06 00:19:41,632 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 237.1ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:19:41,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83902 states. [2021-06-06 00:19:43,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83902 to 82781. [2021-06-06 00:19:43,414 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) [2021-06-06 00:19:43,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82781 states to 82781 states and 243563 transitions. [2021-06-06 00:19:43,603 INFO L78 Accepts]: Start accepts. Automaton has 82781 states and 243563 transitions. Word has length 40 [2021-06-06 00:19:43,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:43,603 INFO L482 AbstractCegarLoop]: Abstraction has 82781 states and 243563 transitions. [2021-06-06 00:19:43,603 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) [2021-06-06 00:19:43,603 INFO L276 IsEmpty]: Start isEmpty. Operand 82781 states and 243563 transitions. [2021-06-06 00:19:43,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:19:43,723 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:43,723 INFO L554 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] [2021-06-06 00:19:43,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:43,923 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:43,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:43,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1038026208, now seen corresponding path program 140 times [2021-06-06 00:19:43,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:43,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787122308] [2021-06-06 00:19:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:43,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:19:44,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:44,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787122308] [2021-06-06 00:19:44,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787122308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:44,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245614592] [2021-06-06 00:19:44,025 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 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 [2021-06-06 00:19:44,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:19:44,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:44,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:19:44,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:44,237 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:44,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245614592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:44,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:44,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-06-06 00:19:44,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960051553] [2021-06-06 00:19:44,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:19:44,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:44,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:19:44,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:19:44,237 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) [2021-06-06 00:19:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:45,087 INFO L93 Difference]: Finished difference Result 83683 states and 245710 transitions. [2021-06-06 00:19:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-06 00:19:45,088 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 [2021-06-06 00:19:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:45,598 INFO L225 Difference]: With dead ends: 83683 [2021-06-06 00:19:45,598 INFO L226 Difference]: Without dead ends: 83552 [2021-06-06 00:19:45,599 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 447.0ms TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2021-06-06 00:19:45,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83552 states. [2021-06-06 00:19:46,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83552 to 82767. [2021-06-06 00:19:46,911 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) [2021-06-06 00:19:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82767 states to 82767 states and 243480 transitions. [2021-06-06 00:19:47,097 INFO L78 Accepts]: Start accepts. Automaton has 82767 states and 243480 transitions. Word has length 40 [2021-06-06 00:19:47,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:47,098 INFO L482 AbstractCegarLoop]: Abstraction has 82767 states and 243480 transitions. [2021-06-06 00:19:47,098 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) [2021-06-06 00:19:47,098 INFO L276 IsEmpty]: Start isEmpty. Operand 82767 states and 243480 transitions. [2021-06-06 00:19:47,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:19:47,212 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:47,212 INFO L554 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] [2021-06-06 00:19:47,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-06 00:19:47,413 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:47,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:47,413 INFO L82 PathProgramCache]: Analyzing trace with hash -38591008, now seen corresponding path program 141 times [2021-06-06 00:19:47,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:47,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372015812] [2021-06-06 00:19:47,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:47,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:47,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372015812] [2021-06-06 00:19:47,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372015812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:47,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292980784] [2021-06-06 00:19:47,528 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 [2021-06-06 00:19:47,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-06 00:19:47,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:47,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:19:47,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:47,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292980784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:47,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:47,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-06 00:19:47,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202533511] [2021-06-06 00:19:47,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:19:47,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:47,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:19:47,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:19:47,757 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) [2021-06-06 00:19:48,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:48,448 INFO L93 Difference]: Finished difference Result 83411 states and 244946 transitions. [2021-06-06 00:19:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:19:48,448 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 [2021-06-06 00:19:48,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:49,037 INFO L225 Difference]: With dead ends: 83411 [2021-06-06 00:19:49,038 INFO L226 Difference]: Without dead ends: 83281 [2021-06-06 00:19:49,038 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 402.9ms TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:19:49,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83281 states. [2021-06-06 00:19:50,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83281 to 79371. [2021-06-06 00:19:50,390 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) [2021-06-06 00:19:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79371 states to 79371 states and 233510 transitions. [2021-06-06 00:19:50,578 INFO L78 Accepts]: Start accepts. Automaton has 79371 states and 233510 transitions. Word has length 40 [2021-06-06 00:19:50,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:50,578 INFO L482 AbstractCegarLoop]: Abstraction has 79371 states and 233510 transitions. [2021-06-06 00:19:50,578 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) [2021-06-06 00:19:50,578 INFO L276 IsEmpty]: Start isEmpty. Operand 79371 states and 233510 transitions. [2021-06-06 00:19:50,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:19:50,691 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:50,691 INFO L554 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] [2021-06-06 00:19:50,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:50,891 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:50,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:50,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1856068912, now seen corresponding path program 142 times [2021-06-06 00:19:50,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:50,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156998637] [2021-06-06 00:19:50,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:51,017 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:51,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:51,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156998637] [2021-06-06 00:19:51,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156998637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:51,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931309309] [2021-06-06 00:19:51,017 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 [2021-06-06 00:19:51,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:19:51,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:51,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:51,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:51,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931309309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:51,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:51,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:19:51,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600336008] [2021-06-06 00:19:51,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:19:51,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:51,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:19:51,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:19:51,245 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) [2021-06-06 00:19:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:51,795 INFO L93 Difference]: Finished difference Result 87077 states and 255818 transitions. [2021-06-06 00:19:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:19:51,795 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 [2021-06-06 00:19:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:52,354 INFO L225 Difference]: With dead ends: 87077 [2021-06-06 00:19:52,354 INFO L226 Difference]: Without dead ends: 86965 [2021-06-06 00:19:52,355 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:19:52,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86965 states. [2021-06-06 00:19:53,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86965 to 86453. [2021-06-06 00:19:53,841 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) [2021-06-06 00:19:54,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86453 states to 86453 states and 254371 transitions. [2021-06-06 00:19:54,043 INFO L78 Accepts]: Start accepts. Automaton has 86453 states and 254371 transitions. Word has length 40 [2021-06-06 00:19:54,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:54,043 INFO L482 AbstractCegarLoop]: Abstraction has 86453 states and 254371 transitions. [2021-06-06 00:19:54,043 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) [2021-06-06 00:19:54,043 INFO L276 IsEmpty]: Start isEmpty. Operand 86453 states and 254371 transitions. [2021-06-06 00:19:54,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:19:54,164 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:54,164 INFO L554 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] [2021-06-06 00:19:54,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:19:54,365 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:54,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:54,365 INFO L82 PathProgramCache]: Analyzing trace with hash 870160672, now seen corresponding path program 143 times [2021-06-06 00:19:54,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:54,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474366812] [2021-06-06 00:19:54,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:54,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:54,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474366812] [2021-06-06 00:19:54,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474366812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:54,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168439295] [2021-06-06 00:19:54,482 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 [2021-06-06 00:19:54,505 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:19:54,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:54,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:54,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:54,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168439295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:54,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:54,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-06 00:19:54,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118585283] [2021-06-06 00:19:54,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:19:54,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:54,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:19:54,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:19:54,701 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) [2021-06-06 00:19:55,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:55,639 INFO L93 Difference]: Finished difference Result 91999 states and 270405 transitions. [2021-06-06 00:19:55,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:19:55,639 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 [2021-06-06 00:19:55,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:55,792 INFO L225 Difference]: With dead ends: 91999 [2021-06-06 00:19:55,792 INFO L226 Difference]: Without dead ends: 91867 [2021-06-06 00:19:55,793 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 255.2ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:19:55,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91867 states. [2021-06-06 00:19:57,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91867 to 87283. [2021-06-06 00:19:57,325 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) [2021-06-06 00:19:57,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87283 states to 87283 states and 256738 transitions. [2021-06-06 00:19:57,549 INFO L78 Accepts]: Start accepts. Automaton has 87283 states and 256738 transitions. Word has length 40 [2021-06-06 00:19:57,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:19:57,550 INFO L482 AbstractCegarLoop]: Abstraction has 87283 states and 256738 transitions. [2021-06-06 00:19:57,550 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) [2021-06-06 00:19:57,550 INFO L276 IsEmpty]: Start isEmpty. Operand 87283 states and 256738 transitions. [2021-06-06 00:19:57,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:19:57,689 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:19:57,689 INFO L554 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] [2021-06-06 00:19:57,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-06 00:19:57,890 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:19:57,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:19:57,890 INFO L82 PathProgramCache]: Analyzing trace with hash -674180934, now seen corresponding path program 144 times [2021-06-06 00:19:57,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:19:57,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963945920] [2021-06-06 00:19:57,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:19:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:19:57,977 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:57,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:19:57,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963945920] [2021-06-06 00:19:57,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963945920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:57,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903833463] [2021-06-06 00:19:57,977 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 [2021-06-06 00:19:58,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:19:58,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:19:58,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:19:58,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:19:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:19:58,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903833463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:19:58,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:19:58,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-06-06 00:19:58,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840479499] [2021-06-06 00:19:58,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:19:58,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:19:58,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:19:58,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:19:58,198 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) [2021-06-06 00:19:59,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:19:59,048 INFO L93 Difference]: Finished difference Result 89515 states and 263099 transitions. [2021-06-06 00:19:59,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:19:59,049 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 [2021-06-06 00:19:59,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:19:59,213 INFO L225 Difference]: With dead ends: 89515 [2021-06-06 00:19:59,213 INFO L226 Difference]: Without dead ends: 89401 [2021-06-06 00:19:59,213 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 224.2ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:19:59,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89401 states. [2021-06-06 00:20:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89401 to 82167. [2021-06-06 00:20:00,668 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) [2021-06-06 00:20:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82167 states to 82167 states and 241734 transitions. [2021-06-06 00:20:00,868 INFO L78 Accepts]: Start accepts. Automaton has 82167 states and 241734 transitions. Word has length 40 [2021-06-06 00:20:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:00,868 INFO L482 AbstractCegarLoop]: Abstraction has 82167 states and 241734 transitions. [2021-06-06 00:20:00,869 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) [2021-06-06 00:20:00,869 INFO L276 IsEmpty]: Start isEmpty. Operand 82167 states and 241734 transitions. [2021-06-06 00:20:00,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:20:00,983 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:00,983 INFO L554 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] [2021-06-06 00:20:01,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-06 00:20:01,184 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:01,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:01,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1896894304, now seen corresponding path program 145 times [2021-06-06 00:20:01,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:01,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670966535] [2021-06-06 00:20:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:01,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:01,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:01,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670966535] [2021-06-06 00:20:01,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670966535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:01,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206532552] [2021-06-06 00:20:01,257 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 [2021-06-06 00:20:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:01,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:20:01,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:01,725 WARN L205 SmtUtils]: Spent 361.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-06 00:20:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:01,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206532552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:01,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:01,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-06 00:20:01,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796096976] [2021-06-06 00:20:01,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:20:01,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:01,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:20:01,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:20:01,883 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) [2021-06-06 00:20:02,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:02,386 INFO L93 Difference]: Finished difference Result 88605 states and 260666 transitions. [2021-06-06 00:20:02,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:20:02,386 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 [2021-06-06 00:20:02,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:02,552 INFO L225 Difference]: With dead ends: 88605 [2021-06-06 00:20:02,552 INFO L226 Difference]: Without dead ends: 88523 [2021-06-06 00:20:02,552 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 596.3ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:20:02,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88523 states. [2021-06-06 00:20:03,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88523 to 87987. [2021-06-06 00:20:04,041 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) [2021-06-06 00:20:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87987 states to 87987 states and 259054 transitions. [2021-06-06 00:20:04,274 INFO L78 Accepts]: Start accepts. Automaton has 87987 states and 259054 transitions. Word has length 40 [2021-06-06 00:20:04,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:04,274 INFO L482 AbstractCegarLoop]: Abstraction has 87987 states and 259054 transitions. [2021-06-06 00:20:04,274 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) [2021-06-06 00:20:04,274 INFO L276 IsEmpty]: Start isEmpty. Operand 87987 states and 259054 transitions. [2021-06-06 00:20:04,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:20:04,718 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:04,719 INFO L554 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] [2021-06-06 00:20:04,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-06-06 00:20:04,933 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:04,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:04,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1777811292, now seen corresponding path program 146 times [2021-06-06 00:20:04,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:04,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880678840] [2021-06-06 00:20:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:04,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:20:05,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:05,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880678840] [2021-06-06 00:20:05,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880678840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:05,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843499424] [2021-06-06 00:20:05,008 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 [2021-06-06 00:20:05,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:20:05,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:05,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:20:05,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:05,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843499424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:05,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:05,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 19 [2021-06-06 00:20:05,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496863870] [2021-06-06 00:20:05,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-06 00:20:05,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:05,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-06 00:20:05,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-06 00:20:05,218 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) [2021-06-06 00:20:05,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:05,766 INFO L93 Difference]: Finished difference Result 88582 states and 260614 transitions. [2021-06-06 00:20:05,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:20:05,766 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 [2021-06-06 00:20:05,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:05,933 INFO L225 Difference]: With dead ends: 88582 [2021-06-06 00:20:05,933 INFO L226 Difference]: Without dead ends: 88470 [2021-06-06 00:20:05,933 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 200.6ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:20:06,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88470 states. [2021-06-06 00:20:07,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88470 to 86373. [2021-06-06 00:20:07,432 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) [2021-06-06 00:20:08,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86373 states to 86373 states and 254137 transitions. [2021-06-06 00:20:08,051 INFO L78 Accepts]: Start accepts. Automaton has 86373 states and 254137 transitions. Word has length 40 [2021-06-06 00:20:08,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:08,051 INFO L482 AbstractCegarLoop]: Abstraction has 86373 states and 254137 transitions. [2021-06-06 00:20:08,051 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) [2021-06-06 00:20:08,051 INFO L276 IsEmpty]: Start isEmpty. Operand 86373 states and 254137 transitions. [2021-06-06 00:20:08,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:20:08,189 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:08,189 INFO L554 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] [2021-06-06 00:20:08,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-06 00:20:08,390 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:08,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:08,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1922098874, now seen corresponding path program 147 times [2021-06-06 00:20:08,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:08,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448294624] [2021-06-06 00:20:08,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:20:08,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:08,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448294624] [2021-06-06 00:20:08,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448294624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:08,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185589148] [2021-06-06 00:20:08,478 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 [2021-06-06 00:20:08,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:20:08,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:08,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-06 00:20:08,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:08,718 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:08,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185589148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:08,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:08,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-06-06 00:20:08,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054048997] [2021-06-06 00:20:08,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:20:08,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:08,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:20:08,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:20:08,719 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) [2021-06-06 00:20:09,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:09,277 INFO L93 Difference]: Finished difference Result 88556 states and 260312 transitions. [2021-06-06 00:20:09,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:20:09,278 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 [2021-06-06 00:20:09,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:09,442 INFO L225 Difference]: With dead ends: 88556 [2021-06-06 00:20:09,442 INFO L226 Difference]: Without dead ends: 88432 [2021-06-06 00:20:09,442 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:20:09,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88432 states. [2021-06-06 00:20:11,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88432 to 87931. [2021-06-06 00:20:11,289 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) [2021-06-06 00:20:11,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87931 states to 87931 states and 258838 transitions. [2021-06-06 00:20:11,506 INFO L78 Accepts]: Start accepts. Automaton has 87931 states and 258838 transitions. Word has length 40 [2021-06-06 00:20:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:11,506 INFO L482 AbstractCegarLoop]: Abstraction has 87931 states and 258838 transitions. [2021-06-06 00:20:11,506 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) [2021-06-06 00:20:11,506 INFO L276 IsEmpty]: Start isEmpty. Operand 87931 states and 258838 transitions. [2021-06-06 00:20:11,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:20:11,627 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:11,627 INFO L554 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] [2021-06-06 00:20:11,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:11,829 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:11,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:11,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1373433222, now seen corresponding path program 148 times [2021-06-06 00:20:11,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:11,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712735995] [2021-06-06 00:20:11,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-06 00:20:11,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:11,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712735995] [2021-06-06 00:20:11,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712735995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:11,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493623437] [2021-06-06 00:20:11,952 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 [2021-06-06 00:20:11,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:20:11,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:11,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:20:11,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:12,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493623437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:12,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:12,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-06-06 00:20:12,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700843368] [2021-06-06 00:20:12,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-06 00:20:12,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:12,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-06 00:20:12,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-06-06 00:20:12,244 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) [2021-06-06 00:20:12,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:12,838 INFO L93 Difference]: Finished difference Result 88462 states and 260034 transitions. [2021-06-06 00:20:12,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-06 00:20:12,838 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 [2021-06-06 00:20:12,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:12,996 INFO L225 Difference]: With dead ends: 88462 [2021-06-06 00:20:12,996 INFO L226 Difference]: Without dead ends: 88332 [2021-06-06 00:20:12,996 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:20:13,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88332 states. [2021-06-06 00:20:14,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88332 to 87915. [2021-06-06 00:20:14,901 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) [2021-06-06 00:20:15,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87915 states to 87915 states and 258794 transitions. [2021-06-06 00:20:15,126 INFO L78 Accepts]: Start accepts. Automaton has 87915 states and 258794 transitions. Word has length 40 [2021-06-06 00:20:15,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:15,126 INFO L482 AbstractCegarLoop]: Abstraction has 87915 states and 258794 transitions. [2021-06-06 00:20:15,126 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) [2021-06-06 00:20:15,126 INFO L276 IsEmpty]: Start isEmpty. Operand 87915 states and 258794 transitions. [2021-06-06 00:20:15,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-06 00:20:15,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:15,263 INFO L554 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] [2021-06-06 00:20:15,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-06 00:20:15,464 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:15,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:15,464 INFO L82 PathProgramCache]: Analyzing trace with hash 87314106, now seen corresponding path program 149 times [2021-06-06 00:20:15,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:15,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445689573] [2021-06-06 00:20:15,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:15,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:15,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445689573] [2021-06-06 00:20:15,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445689573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:15,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50317522] [2021-06-06 00:20:15,591 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 [2021-06-06 00:20:15,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:20:15,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:15,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-06 00:20:15,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:15,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50317522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:15,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:15,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-06 00:20:15,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598191292] [2021-06-06 00:20:15,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:20:15,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:15,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:20:15,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:20:15,836 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) [2021-06-06 00:20:16,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:16,302 INFO L93 Difference]: Finished difference Result 88421 states and 259928 transitions. [2021-06-06 00:20:16,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-06 00:20:16,302 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 [2021-06-06 00:20:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:16,460 INFO L225 Difference]: With dead ends: 88421 [2021-06-06 00:20:16,460 INFO L226 Difference]: Without dead ends: 88345 [2021-06-06 00:20:16,460 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:20:16,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88345 states. [2021-06-06 00:20:18,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88345 to 81541. [2021-06-06 00:20:18,237 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) [2021-06-06 00:20:18,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81541 states to 81541 states and 240089 transitions. [2021-06-06 00:20:18,430 INFO L78 Accepts]: Start accepts. Automaton has 81541 states and 240089 transitions. Word has length 40 [2021-06-06 00:20:18,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:18,430 INFO L482 AbstractCegarLoop]: Abstraction has 81541 states and 240089 transitions. [2021-06-06 00:20:18,430 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) [2021-06-06 00:20:18,430 INFO L276 IsEmpty]: Start isEmpty. Operand 81541 states and 240089 transitions. [2021-06-06 00:20:18,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:20:18,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:18,554 INFO L554 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] [2021-06-06 00:20:18,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-06 00:20:18,754 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:18,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:18,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1013579830, now seen corresponding path program 150 times [2021-06-06 00:20:18,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:18,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348747720] [2021-06-06 00:20:18,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:18,794 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:18,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:18,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348747720] [2021-06-06 00:20:18,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348747720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:18,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525922501] [2021-06-06 00:20:18,794 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 [2021-06-06 00:20:18,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:20:18,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:18,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:20:18,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:18,899 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:18,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525922501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:18,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:18,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-06 00:20:18,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025131539] [2021-06-06 00:20:18,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:20:18,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:18,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:20:18,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:20:18,900 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) [2021-06-06 00:20:19,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:19,459 INFO L93 Difference]: Finished difference Result 106475 states and 313342 transitions. [2021-06-06 00:20:19,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:20:19,459 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 [2021-06-06 00:20:19,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:19,675 INFO L225 Difference]: With dead ends: 106475 [2021-06-06 00:20:19,675 INFO L226 Difference]: Without dead ends: 106475 [2021-06-06 00:20:19,675 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:20:20,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106475 states. [2021-06-06 00:20:21,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106475 to 82605. [2021-06-06 00:20:21,755 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) [2021-06-06 00:20:21,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82605 states to 82605 states and 243116 transitions. [2021-06-06 00:20:21,954 INFO L78 Accepts]: Start accepts. Automaton has 82605 states and 243116 transitions. Word has length 43 [2021-06-06 00:20:21,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:21,954 INFO L482 AbstractCegarLoop]: Abstraction has 82605 states and 243116 transitions. [2021-06-06 00:20:21,955 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) [2021-06-06 00:20:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 82605 states and 243116 transitions. [2021-06-06 00:20:22,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:20:22,086 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:22,087 INFO L554 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] [2021-06-06 00:20:22,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-06 00:20:22,287 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:22,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:22,287 INFO L82 PathProgramCache]: Analyzing trace with hash -22106132, now seen corresponding path program 151 times [2021-06-06 00:20:22,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:22,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523009695] [2021-06-06 00:20:22,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:22,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:22,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523009695] [2021-06-06 00:20:22,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523009695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:22,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318391529] [2021-06-06 00:20:22,326 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 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 [2021-06-06 00:20:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:22,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:20:22,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:22,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318391529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:22,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:22,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-06 00:20:22,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943534104] [2021-06-06 00:20:22,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:20:22,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:22,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:20:22,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:20:22,434 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) [2021-06-06 00:20:22,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:22,978 INFO L93 Difference]: Finished difference Result 128181 states and 373839 transitions. [2021-06-06 00:20:22,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:20:22,978 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 [2021-06-06 00:20:22,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:23,718 INFO L225 Difference]: With dead ends: 128181 [2021-06-06 00:20:23,718 INFO L226 Difference]: Without dead ends: 128094 [2021-06-06 00:20:23,718 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:20:23,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128094 states. [2021-06-06 00:20:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128094 to 82605. [2021-06-06 00:20:25,367 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) [2021-06-06 00:20:25,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82605 states to 82605 states and 243105 transitions. [2021-06-06 00:20:25,555 INFO L78 Accepts]: Start accepts. Automaton has 82605 states and 243105 transitions. Word has length 43 [2021-06-06 00:20:25,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:25,555 INFO L482 AbstractCegarLoop]: Abstraction has 82605 states and 243105 transitions. [2021-06-06 00:20:25,555 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) [2021-06-06 00:20:25,556 INFO L276 IsEmpty]: Start isEmpty. Operand 82605 states and 243105 transitions. [2021-06-06 00:20:25,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:20:25,672 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:25,672 INFO L554 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] [2021-06-06 00:20:25,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:25,872 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:25,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:25,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1136369384, now seen corresponding path program 152 times [2021-06-06 00:20:25,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:25,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55062118] [2021-06-06 00:20:25,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:25,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:25,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55062118] [2021-06-06 00:20:25,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55062118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:25,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265212214] [2021-06-06 00:20:25,910 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 [2021-06-06 00:20:25,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:20:25,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:25,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:20:25,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:26,044 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:26,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265212214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:26,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:26,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:20:26,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580983987] [2021-06-06 00:20:26,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:20:26,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:26,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:20:26,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:20:26,045 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) [2021-06-06 00:20:27,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:27,583 INFO L93 Difference]: Finished difference Result 145421 states and 423333 transitions. [2021-06-06 00:20:27,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:20:27,583 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 [2021-06-06 00:20:27,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:27,860 INFO L225 Difference]: With dead ends: 145421 [2021-06-06 00:20:27,860 INFO L226 Difference]: Without dead ends: 145391 [2021-06-06 00:20:27,860 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 575.0ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-06-06 00:20:28,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145391 states. [2021-06-06 00:20:30,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145391 to 98900. [2021-06-06 00:20:30,443 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) [2021-06-06 00:20:30,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98900 states to 98900 states and 291992 transitions. [2021-06-06 00:20:30,673 INFO L78 Accepts]: Start accepts. Automaton has 98900 states and 291992 transitions. Word has length 43 [2021-06-06 00:20:30,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:30,673 INFO L482 AbstractCegarLoop]: Abstraction has 98900 states and 291992 transitions. [2021-06-06 00:20:30,673 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) [2021-06-06 00:20:30,673 INFO L276 IsEmpty]: Start isEmpty. Operand 98900 states and 291992 transitions. [2021-06-06 00:20:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:20:30,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:30,808 INFO L554 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] [2021-06-06 00:20:31,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-06 00:20:31,008 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:31,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:31,009 INFO L82 PathProgramCache]: Analyzing trace with hash 925672338, now seen corresponding path program 153 times [2021-06-06 00:20:31,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:31,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034329174] [2021-06-06 00:20:31,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:31,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:31,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034329174] [2021-06-06 00:20:31,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034329174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:31,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836236542] [2021-06-06 00:20:31,047 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 [2021-06-06 00:20:31,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:20:31,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:31,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:20:31,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:31,159 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:31,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836236542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:31,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:31,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:20:31,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216220343] [2021-06-06 00:20:31,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:20:31,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:31,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:20:31,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:20:31,160 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) [2021-06-06 00:20:32,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:32,437 INFO L93 Difference]: Finished difference Result 115582 states and 339026 transitions. [2021-06-06 00:20:32,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:20:32,437 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 [2021-06-06 00:20:32,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:32,657 INFO L225 Difference]: With dead ends: 115582 [2021-06-06 00:20:32,657 INFO L226 Difference]: Without dead ends: 115570 [2021-06-06 00:20:32,657 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 364.5ms TimeCoverageRelationStatistics Valid=876, Invalid=1674, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:20:32,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115570 states. [2021-06-06 00:20:34,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115570 to 102024. [2021-06-06 00:20:35,080 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) [2021-06-06 00:20:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102024 states to 102024 states and 301642 transitions. [2021-06-06 00:20:35,411 INFO L78 Accepts]: Start accepts. Automaton has 102024 states and 301642 transitions. Word has length 43 [2021-06-06 00:20:35,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:35,411 INFO L482 AbstractCegarLoop]: Abstraction has 102024 states and 301642 transitions. [2021-06-06 00:20:35,411 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) [2021-06-06 00:20:35,411 INFO L276 IsEmpty]: Start isEmpty. Operand 102024 states and 301642 transitions. [2021-06-06 00:20:35,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:20:35,593 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:35,593 INFO L554 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] [2021-06-06 00:20:35,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:35,809 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:35,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:35,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1654424156, now seen corresponding path program 154 times [2021-06-06 00:20:35,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:35,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773433351] [2021-06-06 00:20:35,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:35,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:35,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773433351] [2021-06-06 00:20:35,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773433351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:35,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650133531] [2021-06-06 00:20:35,850 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 [2021-06-06 00:20:35,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:20:35,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:35,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:20:35,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:35,973 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:35,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650133531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:35,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:35,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:20:35,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489894779] [2021-06-06 00:20:35,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:20:35,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:35,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:20:35,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:20:35,974 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) [2021-06-06 00:20:37,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:37,505 INFO L93 Difference]: Finished difference Result 117555 states and 344061 transitions. [2021-06-06 00:20:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:20:37,505 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 [2021-06-06 00:20:37,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:37,729 INFO L225 Difference]: With dead ends: 117555 [2021-06-06 00:20:37,729 INFO L226 Difference]: Without dead ends: 117555 [2021-06-06 00:20:37,729 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 466.2ms TimeCoverageRelationStatistics Valid=1199, Invalid=2341, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:20:37,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117555 states. [2021-06-06 00:20:39,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117555 to 94698. [2021-06-06 00:20:40,000 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) [2021-06-06 00:20:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94698 states to 94698 states and 279337 transitions. [2021-06-06 00:20:40,246 INFO L78 Accepts]: Start accepts. Automaton has 94698 states and 279337 transitions. Word has length 43 [2021-06-06 00:20:40,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:40,246 INFO L482 AbstractCegarLoop]: Abstraction has 94698 states and 279337 transitions. [2021-06-06 00:20:40,246 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) [2021-06-06 00:20:40,246 INFO L276 IsEmpty]: Start isEmpty. Operand 94698 states and 279337 transitions. [2021-06-06 00:20:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:20:40,382 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:40,382 INFO L554 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] [2021-06-06 00:20:40,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:40,583 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:40,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:40,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1277453002, now seen corresponding path program 155 times [2021-06-06 00:20:40,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:40,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756762765] [2021-06-06 00:20:40,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:40,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:40,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756762765] [2021-06-06 00:20:40,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756762765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:40,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712251536] [2021-06-06 00:20:40,621 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 [2021-06-06 00:20:40,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-06 00:20:40,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:40,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:20:40,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:40,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712251536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:40,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:40,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:20:40,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324675860] [2021-06-06 00:20:40,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:20:40,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:40,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:20:40,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:20:40,734 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) [2021-06-06 00:20:41,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:41,667 INFO L93 Difference]: Finished difference Result 139702 states and 406719 transitions. [2021-06-06 00:20:41,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:20:41,668 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 [2021-06-06 00:20:41,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:42,414 INFO L225 Difference]: With dead ends: 139702 [2021-06-06 00:20:42,414 INFO L226 Difference]: Without dead ends: 139688 [2021-06-06 00:20:42,414 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 327.7ms TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:20:42,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139688 states. [2021-06-06 00:20:44,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139688 to 87080. [2021-06-06 00:20:44,381 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) [2021-06-06 00:20:44,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87080 states to 87080 states and 255884 transitions. [2021-06-06 00:20:44,915 INFO L78 Accepts]: Start accepts. Automaton has 87080 states and 255884 transitions. Word has length 43 [2021-06-06 00:20:44,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:44,915 INFO L482 AbstractCegarLoop]: Abstraction has 87080 states and 255884 transitions. [2021-06-06 00:20:44,915 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) [2021-06-06 00:20:44,915 INFO L276 IsEmpty]: Start isEmpty. Operand 87080 states and 255884 transitions. [2021-06-06 00:20:45,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:20:45,083 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:45,083 INFO L554 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] [2021-06-06 00:20:45,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:45,284 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:45,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:45,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1361851776, now seen corresponding path program 156 times [2021-06-06 00:20:45,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:45,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972971631] [2021-06-06 00:20:45,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:45,321 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:45,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:45,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972971631] [2021-06-06 00:20:45,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972971631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:45,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599135672] [2021-06-06 00:20:45,322 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 [2021-06-06 00:20:45,346 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:20:45,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:45,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:20:45,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:45,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599135672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:45,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:45,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:20:45,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932224766] [2021-06-06 00:20:45,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:20:45,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:45,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:20:45,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:20:45,451 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) [2021-06-06 00:20:46,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:46,294 INFO L93 Difference]: Finished difference Result 134788 states and 392170 transitions. [2021-06-06 00:20:46,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:20:46,295 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 [2021-06-06 00:20:46,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:46,546 INFO L225 Difference]: With dead ends: 134788 [2021-06-06 00:20:46,546 INFO L226 Difference]: Without dead ends: 134732 [2021-06-06 00:20:46,546 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 313.8ms TimeCoverageRelationStatistics Valid=502, Invalid=1568, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:20:46,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134732 states. [2021-06-06 00:20:48,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134732 to 88260. [2021-06-06 00:20:48,824 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) [2021-06-06 00:20:49,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88260 states to 88260 states and 259162 transitions. [2021-06-06 00:20:49,024 INFO L78 Accepts]: Start accepts. Automaton has 88260 states and 259162 transitions. Word has length 43 [2021-06-06 00:20:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:49,024 INFO L482 AbstractCegarLoop]: Abstraction has 88260 states and 259162 transitions. [2021-06-06 00:20:49,024 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) [2021-06-06 00:20:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 88260 states and 259162 transitions. [2021-06-06 00:20:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:20:49,145 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:49,145 INFO L554 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] [2021-06-06 00:20:49,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:49,345 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:49,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:49,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1293078010, now seen corresponding path program 157 times [2021-06-06 00:20:49,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:49,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855961473] [2021-06-06 00:20:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:49,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:49,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855961473] [2021-06-06 00:20:49,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855961473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:49,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001661560] [2021-06-06 00:20:49,383 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 [2021-06-06 00:20:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:49,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:20:49,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:49,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001661560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:49,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:49,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:20:49,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332075069] [2021-06-06 00:20:49,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:20:49,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:49,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:20:49,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:20:49,496 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) [2021-06-06 00:20:50,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:50,649 INFO L93 Difference]: Finished difference Result 137498 states and 399912 transitions. [2021-06-06 00:20:50,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:20:50,650 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 [2021-06-06 00:20:50,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:50,913 INFO L225 Difference]: With dead ends: 137498 [2021-06-06 00:20:50,913 INFO L226 Difference]: Without dead ends: 137400 [2021-06-06 00:20:50,913 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 291.7ms TimeCoverageRelationStatistics Valid=452, Invalid=1440, Unknown=0, NotChecked=0, Total=1892 [2021-06-06 00:20:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137400 states. [2021-06-06 00:20:53,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137400 to 89196. [2021-06-06 00:20:53,213 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) [2021-06-06 00:20:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89196 states to 89196 states and 261826 transitions. [2021-06-06 00:20:53,410 INFO L78 Accepts]: Start accepts. Automaton has 89196 states and 261826 transitions. Word has length 43 [2021-06-06 00:20:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:53,410 INFO L482 AbstractCegarLoop]: Abstraction has 89196 states and 261826 transitions. [2021-06-06 00:20:53,410 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) [2021-06-06 00:20:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 89196 states and 261826 transitions. [2021-06-06 00:20:53,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:20:53,535 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:53,535 INFO L554 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] [2021-06-06 00:20:53,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:20:53,736 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:53,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:53,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1811390400, now seen corresponding path program 158 times [2021-06-06 00:20:53,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:53,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489157957] [2021-06-06 00:20:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:53,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:53,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489157957] [2021-06-06 00:20:53,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489157957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:53,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969997669] [2021-06-06 00:20:53,776 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 [2021-06-06 00:20:53,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:20:53,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:53,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:20:53,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:53,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969997669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:53,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:53,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:20:53,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67191382] [2021-06-06 00:20:53,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:20:53,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:53,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:20:53,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:20:53,888 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) [2021-06-06 00:20:54,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:54,993 INFO L93 Difference]: Finished difference Result 130434 states and 379264 transitions. [2021-06-06 00:20:54,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-06 00:20:54,993 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 [2021-06-06 00:20:54,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:55,386 INFO L225 Difference]: With dead ends: 130434 [2021-06-06 00:20:55,386 INFO L226 Difference]: Without dead ends: 130364 [2021-06-06 00:20:55,386 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 219.7ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:20:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130364 states. [2021-06-06 00:20:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130364 to 89196. [2021-06-06 00:20:57,320 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) [2021-06-06 00:20:57,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89196 states to 89196 states and 261744 transitions. [2021-06-06 00:20:57,527 INFO L78 Accepts]: Start accepts. Automaton has 89196 states and 261744 transitions. Word has length 43 [2021-06-06 00:20:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:20:57,527 INFO L482 AbstractCegarLoop]: Abstraction has 89196 states and 261744 transitions. [2021-06-06 00:20:57,527 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) [2021-06-06 00:20:57,527 INFO L276 IsEmpty]: Start isEmpty. Operand 89196 states and 261744 transitions. [2021-06-06 00:20:58,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:20:58,092 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:20:58,092 INFO L554 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] [2021-06-06 00:20:58,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-06 00:20:58,292 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:20:58,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:20:58,293 INFO L82 PathProgramCache]: Analyzing trace with hash -939318, now seen corresponding path program 159 times [2021-06-06 00:20:58,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:20:58,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992009697] [2021-06-06 00:20:58,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:20:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:20:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:58,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:20:58,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992009697] [2021-06-06 00:20:58,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992009697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:58,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984931556] [2021-06-06 00:20:58,333 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 [2021-06-06 00:20:58,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-06 00:20:58,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:20:58,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:20:58,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:20:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:20:58,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984931556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:20:58,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:20:58,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:20:58,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100890787] [2021-06-06 00:20:58,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:20:58,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:20:58,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:20:58,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:20:58,455 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) [2021-06-06 00:20:59,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:20:59,316 INFO L93 Difference]: Finished difference Result 104528 states and 305186 transitions. [2021-06-06 00:20:59,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-06 00:20:59,316 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 [2021-06-06 00:20:59,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:20:59,511 INFO L225 Difference]: With dead ends: 104528 [2021-06-06 00:20:59,511 INFO L226 Difference]: Without dead ends: 104468 [2021-06-06 00:20:59,511 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 403.9ms TimeCoverageRelationStatistics Valid=973, Invalid=2107, Unknown=0, NotChecked=0, Total=3080 [2021-06-06 00:20:59,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104468 states. [2021-06-06 00:21:01,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104468 to 92172. [2021-06-06 00:21:01,555 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) [2021-06-06 00:21:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92172 states to 92172 states and 270396 transitions. [2021-06-06 00:21:01,767 INFO L78 Accepts]: Start accepts. Automaton has 92172 states and 270396 transitions. Word has length 43 [2021-06-06 00:21:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:01,767 INFO L482 AbstractCegarLoop]: Abstraction has 92172 states and 270396 transitions. [2021-06-06 00:21:01,767 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) [2021-06-06 00:21:01,767 INFO L276 IsEmpty]: Start isEmpty. Operand 92172 states and 270396 transitions. [2021-06-06 00:21:01,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:21:01,892 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:01,892 INFO L554 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] [2021-06-06 00:21:02,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-06 00:21:02,092 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:02,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:02,093 INFO L82 PathProgramCache]: Analyzing trace with hash 415720322, now seen corresponding path program 160 times [2021-06-06 00:21:02,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:02,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30236478] [2021-06-06 00:21:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:02,125 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:02,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:02,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30236478] [2021-06-06 00:21:02,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30236478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:02,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451088445] [2021-06-06 00:21:02,126 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 [2021-06-06 00:21:02,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:21:02,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:02,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:02,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:02,239 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:02,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451088445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:02,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:02,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-06 00:21:02,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688807303] [2021-06-06 00:21:02,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:21:02,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:02,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:21:02,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:21:02,240 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) [2021-06-06 00:21:03,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:03,698 INFO L93 Difference]: Finished difference Result 107768 states and 313292 transitions. [2021-06-06 00:21:03,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:21:03,698 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 [2021-06-06 00:21:03,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:03,913 INFO L225 Difference]: With dead ends: 107768 [2021-06-06 00:21:03,913 INFO L226 Difference]: Without dead ends: 107740 [2021-06-06 00:21:03,914 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 508.3ms TimeCoverageRelationStatistics Valid=1190, Invalid=2350, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:21:04,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107740 states. [2021-06-06 00:21:05,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107740 to 86702. [2021-06-06 00:21:05,786 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) [2021-06-06 00:21:06,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86702 states to 86702 states and 254395 transitions. [2021-06-06 00:21:06,357 INFO L78 Accepts]: Start accepts. Automaton has 86702 states and 254395 transitions. Word has length 43 [2021-06-06 00:21:06,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:06,357 INFO L482 AbstractCegarLoop]: Abstraction has 86702 states and 254395 transitions. [2021-06-06 00:21:06,357 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) [2021-06-06 00:21:06,357 INFO L276 IsEmpty]: Start isEmpty. Operand 86702 states and 254395 transitions. [2021-06-06 00:21:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:21:06,493 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:06,493 INFO L554 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] [2021-06-06 00:21:06,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-06 00:21:06,693 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:06,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:06,694 INFO L82 PathProgramCache]: Analyzing trace with hash -976949870, now seen corresponding path program 161 times [2021-06-06 00:21:06,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:06,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626259094] [2021-06-06 00:21:06,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:06,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:06,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626259094] [2021-06-06 00:21:06,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626259094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:06,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092176081] [2021-06-06 00:21:06,733 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 [2021-06-06 00:21:06,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-06 00:21:06,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:06,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:06,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:06,862 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:06,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092176081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:06,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:06,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:21:06,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025425654] [2021-06-06 00:21:06,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:21:06,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:06,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:21:06,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:21:06,863 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) [2021-06-06 00:21:07,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:07,786 INFO L93 Difference]: Finished difference Result 106763 states and 310618 transitions. [2021-06-06 00:21:07,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:21:07,787 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 [2021-06-06 00:21:07,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:07,985 INFO L225 Difference]: With dead ends: 106763 [2021-06-06 00:21:07,985 INFO L226 Difference]: Without dead ends: 106625 [2021-06-06 00:21:07,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 454.4ms TimeCoverageRelationStatistics Valid=996, Invalid=2426, Unknown=0, NotChecked=0, Total=3422 [2021-06-06 00:21:08,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106625 states. [2021-06-06 00:21:09,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106625 to 89334. [2021-06-06 00:21:09,937 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) [2021-06-06 00:21:10,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89334 states to 89334 states and 261755 transitions. [2021-06-06 00:21:10,144 INFO L78 Accepts]: Start accepts. Automaton has 89334 states and 261755 transitions. Word has length 43 [2021-06-06 00:21:10,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:10,145 INFO L482 AbstractCegarLoop]: Abstraction has 89334 states and 261755 transitions. [2021-06-06 00:21:10,145 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) [2021-06-06 00:21:10,145 INFO L276 IsEmpty]: Start isEmpty. Operand 89334 states and 261755 transitions. [2021-06-06 00:21:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:21:10,264 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:10,264 INFO L554 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] [2021-06-06 00:21:10,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:10,465 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:10,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:10,465 INFO L82 PathProgramCache]: Analyzing trace with hash -725487968, now seen corresponding path program 162 times [2021-06-06 00:21:10,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:10,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298913161] [2021-06-06 00:21:10,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:10,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:10,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298913161] [2021-06-06 00:21:10,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298913161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:10,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108736351] [2021-06-06 00:21:10,515 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 [2021-06-06 00:21:10,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-06 00:21:10,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:10,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:10,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:10,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108736351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:10,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:10,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-06 00:21:10,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999877774] [2021-06-06 00:21:10,647 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:21:10,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:10,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:21:10,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:21:10,647 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) [2021-06-06 00:21:12,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:12,081 INFO L93 Difference]: Finished difference Result 113867 states and 330296 transitions. [2021-06-06 00:21:12,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-06 00:21:12,082 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 [2021-06-06 00:21:12,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:12,280 INFO L225 Difference]: With dead ends: 113867 [2021-06-06 00:21:12,280 INFO L226 Difference]: Without dead ends: 113832 [2021-06-06 00:21:12,281 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 603.7ms TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:21:12,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113832 states. [2021-06-06 00:21:14,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113832 to 94432. [2021-06-06 00:21:14,418 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) [2021-06-06 00:21:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94432 states to 94432 states and 276846 transitions. [2021-06-06 00:21:14,631 INFO L78 Accepts]: Start accepts. Automaton has 94432 states and 276846 transitions. Word has length 43 [2021-06-06 00:21:14,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:14,631 INFO L482 AbstractCegarLoop]: Abstraction has 94432 states and 276846 transitions. [2021-06-06 00:21:14,631 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) [2021-06-06 00:21:14,631 INFO L276 IsEmpty]: Start isEmpty. Operand 94432 states and 276846 transitions. [2021-06-06 00:21:14,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:21:14,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:14,760 INFO L554 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] [2021-06-06 00:21:14,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-06-06 00:21:14,960 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:14,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:14,961 INFO L82 PathProgramCache]: Analyzing trace with hash -378710582, now seen corresponding path program 163 times [2021-06-06 00:21:14,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:14,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615207112] [2021-06-06 00:21:14,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:15,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:15,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615207112] [2021-06-06 00:21:15,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615207112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:15,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082323700] [2021-06-06 00:21:15,001 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 [2021-06-06 00:21:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:15,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:15,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:15,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082323700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:15,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:15,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:21:15,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575812755] [2021-06-06 00:21:15,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:21:15,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:15,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:21:15,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:21:15,139 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) [2021-06-06 00:21:16,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:16,532 INFO L93 Difference]: Finished difference Result 114703 states and 333022 transitions. [2021-06-06 00:21:16,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:21:16,533 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 [2021-06-06 00:21:16,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:16,760 INFO L225 Difference]: With dead ends: 114703 [2021-06-06 00:21:16,760 INFO L226 Difference]: Without dead ends: 114511 [2021-06-06 00:21:16,761 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 500.6ms TimeCoverageRelationStatistics Valid=1034, Invalid=2748, Unknown=0, NotChecked=0, Total=3782 [2021-06-06 00:21:16,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114511 states. [2021-06-06 00:21:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114511 to 99458. [2021-06-06 00:21:18,698 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) [2021-06-06 00:21:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99458 states to 99458 states and 291211 transitions. [2021-06-06 00:21:19,347 INFO L78 Accepts]: Start accepts. Automaton has 99458 states and 291211 transitions. Word has length 43 [2021-06-06 00:21:19,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:19,347 INFO L482 AbstractCegarLoop]: Abstraction has 99458 states and 291211 transitions. [2021-06-06 00:21:19,347 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) [2021-06-06 00:21:19,347 INFO L276 IsEmpty]: Start isEmpty. Operand 99458 states and 291211 transitions. [2021-06-06 00:21:19,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:21:19,477 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:19,477 INFO L554 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] [2021-06-06 00:21:19,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:19,678 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:19,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:19,678 INFO L82 PathProgramCache]: Analyzing trace with hash 499459778, now seen corresponding path program 164 times [2021-06-06 00:21:19,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:19,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364059789] [2021-06-06 00:21:19,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:19,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:19,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:19,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364059789] [2021-06-06 00:21:19,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364059789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:19,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762503138] [2021-06-06 00:21:19,703 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 [2021-06-06 00:21:19,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:21:19,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:19,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:19,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:19,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762503138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:19,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:19,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-06 00:21:19,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121391608] [2021-06-06 00:21:19,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:21:19,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:19,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:21:19,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:21:19,828 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) [2021-06-06 00:21:20,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:20,946 INFO L93 Difference]: Finished difference Result 134026 states and 389085 transitions. [2021-06-06 00:21:20,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:21:20,946 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 [2021-06-06 00:21:20,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:21,198 INFO L225 Difference]: With dead ends: 134026 [2021-06-06 00:21:21,198 INFO L226 Difference]: Without dead ends: 133998 [2021-06-06 00:21:21,198 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 538.8ms TimeCoverageRelationStatistics Valid=1414, Invalid=2876, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:21:21,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133998 states. [2021-06-06 00:21:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133998 to 114908. [2021-06-06 00:21:24,004 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) [2021-06-06 00:21:24,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114908 states to 114908 states and 335796 transitions. [2021-06-06 00:21:24,294 INFO L78 Accepts]: Start accepts. Automaton has 114908 states and 335796 transitions. Word has length 43 [2021-06-06 00:21:24,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:24,295 INFO L482 AbstractCegarLoop]: Abstraction has 114908 states and 335796 transitions. [2021-06-06 00:21:24,295 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) [2021-06-06 00:21:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 114908 states and 335796 transitions. [2021-06-06 00:21:24,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:21:24,468 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:24,468 INFO L554 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] [2021-06-06 00:21:24,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:24,668 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:24,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:24,669 INFO L82 PathProgramCache]: Analyzing trace with hash 223084418, now seen corresponding path program 165 times [2021-06-06 00:21:24,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:24,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955822243] [2021-06-06 00:21:24,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:24,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:24,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955822243] [2021-06-06 00:21:24,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955822243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:24,707 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972495713] [2021-06-06 00:21:24,707 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 [2021-06-06 00:21:24,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:21:24,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:24,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:24,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:24,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972495713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:24,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:24,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-06 00:21:24,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364241291] [2021-06-06 00:21:24,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:21:24,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:24,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:21:24,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:21:24,822 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) [2021-06-06 00:21:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:25,441 INFO L93 Difference]: Finished difference Result 127931 states and 372783 transitions. [2021-06-06 00:21:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:21:25,442 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 [2021-06-06 00:21:25,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:26,284 INFO L225 Difference]: With dead ends: 127931 [2021-06-06 00:21:26,284 INFO L226 Difference]: Without dead ends: 127931 [2021-06-06 00:21:26,284 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:21:26,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127931 states. [2021-06-06 00:21:28,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127931 to 115940. [2021-06-06 00:21:28,209 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) [2021-06-06 00:21:28,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115940 states to 115940 states and 338836 transitions. [2021-06-06 00:21:28,950 INFO L78 Accepts]: Start accepts. Automaton has 115940 states and 338836 transitions. Word has length 43 [2021-06-06 00:21:28,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:28,950 INFO L482 AbstractCegarLoop]: Abstraction has 115940 states and 338836 transitions. [2021-06-06 00:21:28,950 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) [2021-06-06 00:21:28,950 INFO L276 IsEmpty]: Start isEmpty. Operand 115940 states and 338836 transitions. [2021-06-06 00:21:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:21:29,140 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:29,140 INFO L554 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] [2021-06-06 00:21:29,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:29,341 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:29,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:29,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1001606290, now seen corresponding path program 166 times [2021-06-06 00:21:29,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:29,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116542868] [2021-06-06 00:21:29,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:29,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:29,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116542868] [2021-06-06 00:21:29,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116542868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:29,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806158833] [2021-06-06 00:21:29,388 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 [2021-06-06 00:21:29,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:21:29,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:29,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:29,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:29,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806158833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:29,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:29,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-06 00:21:29,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681865410] [2021-06-06 00:21:29,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:21:29,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:29,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:21:29,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:21:29,496 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) [2021-06-06 00:21:30,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:30,043 INFO L93 Difference]: Finished difference Result 136802 states and 396449 transitions. [2021-06-06 00:21:30,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:21:30,044 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 [2021-06-06 00:21:30,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:30,309 INFO L225 Difference]: With dead ends: 136802 [2021-06-06 00:21:30,309 INFO L226 Difference]: Without dead ends: 136730 [2021-06-06 00:21:30,309 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:21:30,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136730 states. [2021-06-06 00:21:32,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136730 to 115940. [2021-06-06 00:21:32,840 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) [2021-06-06 00:21:33,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115940 states to 115940 states and 338824 transitions. [2021-06-06 00:21:33,107 INFO L78 Accepts]: Start accepts. Automaton has 115940 states and 338824 transitions. Word has length 43 [2021-06-06 00:21:33,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:33,107 INFO L482 AbstractCegarLoop]: Abstraction has 115940 states and 338824 transitions. [2021-06-06 00:21:33,108 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) [2021-06-06 00:21:33,108 INFO L276 IsEmpty]: Start isEmpty. Operand 115940 states and 338824 transitions. [2021-06-06 00:21:33,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:21:33,279 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:33,279 INFO L554 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] [2021-06-06 00:21:33,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable263 [2021-06-06 00:21:33,479 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:33,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:33,480 INFO L82 PathProgramCache]: Analyzing trace with hash 5413476, now seen corresponding path program 167 times [2021-06-06 00:21:33,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:33,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227037204] [2021-06-06 00:21:33,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:33,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:33,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227037204] [2021-06-06 00:21:33,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227037204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:33,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237036514] [2021-06-06 00:21:33,524 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 [2021-06-06 00:21:33,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:21:33,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:33,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:33,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:34,068 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-06-06 00:21:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:34,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237036514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:34,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:34,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:21:34,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750839672] [2021-06-06 00:21:34,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:21:34,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:34,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:21:34,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:21:34,101 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) [2021-06-06 00:21:34,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:34,825 INFO L93 Difference]: Finished difference Result 126431 states and 367544 transitions. [2021-06-06 00:21:34,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:21:34,825 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 [2021-06-06 00:21:34,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:35,065 INFO L225 Difference]: With dead ends: 126431 [2021-06-06 00:21:35,065 INFO L226 Difference]: Without dead ends: 126431 [2021-06-06 00:21:35,066 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-06-06 00:21:35,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126431 states. [2021-06-06 00:21:37,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126431 to 116842. [2021-06-06 00:21:37,480 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) [2021-06-06 00:21:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116842 states to 116842 states and 341399 transitions. [2021-06-06 00:21:37,773 INFO L78 Accepts]: Start accepts. Automaton has 116842 states and 341399 transitions. Word has length 43 [2021-06-06 00:21:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:37,773 INFO L482 AbstractCegarLoop]: Abstraction has 116842 states and 341399 transitions. [2021-06-06 00:21:37,773 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) [2021-06-06 00:21:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 116842 states and 341399 transitions. [2021-06-06 00:21:37,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:21:37,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:37,962 INFO L554 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] [2021-06-06 00:21:38,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:21:38,163 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:38,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:38,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1165282054, now seen corresponding path program 168 times [2021-06-06 00:21:38,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:38,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823392948] [2021-06-06 00:21:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:38,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:38,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823392948] [2021-06-06 00:21:38,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823392948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:38,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853947780] [2021-06-06 00:21:38,212 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 [2021-06-06 00:21:38,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:21:38,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:38,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:38,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:38,330 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:38,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853947780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:38,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:38,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:21:38,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644115623] [2021-06-06 00:21:38,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:21:38,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:38,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:21:38,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:21:38,331 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) [2021-06-06 00:21:39,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:39,898 INFO L93 Difference]: Finished difference Result 138518 states and 400785 transitions. [2021-06-06 00:21:39,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:21:39,898 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 [2021-06-06 00:21:39,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:40,293 INFO L225 Difference]: With dead ends: 138518 [2021-06-06 00:21:40,294 INFO L226 Difference]: Without dead ends: 138458 [2021-06-06 00:21:40,294 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 263.5ms TimeCoverageRelationStatistics Valid=373, Invalid=1109, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:21:40,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138458 states. [2021-06-06 00:21:42,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138458 to 120234. [2021-06-06 00:21:42,810 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) [2021-06-06 00:21:43,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120234 states to 120234 states and 351555 transitions. [2021-06-06 00:21:43,089 INFO L78 Accepts]: Start accepts. Automaton has 120234 states and 351555 transitions. Word has length 43 [2021-06-06 00:21:43,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:43,089 INFO L482 AbstractCegarLoop]: Abstraction has 120234 states and 351555 transitions. [2021-06-06 00:21:43,089 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) [2021-06-06 00:21:43,089 INFO L276 IsEmpty]: Start isEmpty. Operand 120234 states and 351555 transitions. [2021-06-06 00:21:43,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:21:43,263 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:43,263 INFO L554 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] [2021-06-06 00:21:43,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-06 00:21:43,463 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:43,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:43,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1534575938, now seen corresponding path program 169 times [2021-06-06 00:21:43,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:43,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103116790] [2021-06-06 00:21:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:43,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:43,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103116790] [2021-06-06 00:21:43,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103116790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:43,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722980930] [2021-06-06 00:21:43,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-06 00:21:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:43,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:43,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:43,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722980930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:43,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:43,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:21:43,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655789528] [2021-06-06 00:21:43,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:21:43,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:43,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:21:43,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:21:43,609 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) [2021-06-06 00:21:45,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:45,161 INFO L93 Difference]: Finished difference Result 137463 states and 399174 transitions. [2021-06-06 00:21:45,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:21:45,161 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 [2021-06-06 00:21:45,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:45,420 INFO L225 Difference]: With dead ends: 137463 [2021-06-06 00:21:45,420 INFO L226 Difference]: Without dead ends: 137463 [2021-06-06 00:21:45,421 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=814, Invalid=1838, Unknown=0, NotChecked=0, Total=2652 [2021-06-06 00:21:45,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137463 states. [2021-06-06 00:21:47,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137463 to 123758. [2021-06-06 00:21:47,834 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) [2021-06-06 00:21:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123758 states to 123758 states and 361541 transitions. [2021-06-06 00:21:48,126 INFO L78 Accepts]: Start accepts. Automaton has 123758 states and 361541 transitions. Word has length 43 [2021-06-06 00:21:48,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:48,126 INFO L482 AbstractCegarLoop]: Abstraction has 123758 states and 361541 transitions. [2021-06-06 00:21:48,126 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) [2021-06-06 00:21:48,126 INFO L276 IsEmpty]: Start isEmpty. Operand 123758 states and 361541 transitions. [2021-06-06 00:21:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:21:48,309 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:48,309 INFO L554 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] [2021-06-06 00:21:48,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-06 00:21:48,510 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:48,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:48,510 INFO L82 PathProgramCache]: Analyzing trace with hash -268885396, now seen corresponding path program 170 times [2021-06-06 00:21:48,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:48,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264992586] [2021-06-06 00:21:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:48,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:48,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264992586] [2021-06-06 00:21:48,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264992586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:48,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123132822] [2021-06-06 00:21:48,547 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 [2021-06-06 00:21:48,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:21:48,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:48,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:48,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:48,659 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:48,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123132822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:48,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:48,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:21:48,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192096644] [2021-06-06 00:21:48,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:21:48,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:48,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:21:48,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:21:48,660 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) [2021-06-06 00:21:50,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:50,133 INFO L93 Difference]: Finished difference Result 164424 states and 477010 transitions. [2021-06-06 00:21:50,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:21:50,133 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 [2021-06-06 00:21:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:50,448 INFO L225 Difference]: With dead ends: 164424 [2021-06-06 00:21:50,448 INFO L226 Difference]: Without dead ends: 164340 [2021-06-06 00:21:50,449 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 349.0ms TimeCoverageRelationStatistics Valid=497, Invalid=1573, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:21:50,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164340 states. [2021-06-06 00:21:53,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164340 to 139180. [2021-06-06 00:21:53,430 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) [2021-06-06 00:21:54,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139180 states to 139180 states and 405936 transitions. [2021-06-06 00:21:54,183 INFO L78 Accepts]: Start accepts. Automaton has 139180 states and 405936 transitions. Word has length 43 [2021-06-06 00:21:54,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:21:54,183 INFO L482 AbstractCegarLoop]: Abstraction has 139180 states and 405936 transitions. [2021-06-06 00:21:54,183 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) [2021-06-06 00:21:54,184 INFO L276 IsEmpty]: Start isEmpty. Operand 139180 states and 405936 transitions. [2021-06-06 00:21:54,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:21:54,400 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:21:54,400 INFO L554 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] [2021-06-06 00:21:54,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-06 00:21:54,600 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:21:54,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:21:54,601 INFO L82 PathProgramCache]: Analyzing trace with hash -471353564, now seen corresponding path program 171 times [2021-06-06 00:21:54,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:21:54,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17193623] [2021-06-06 00:21:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:21:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:21:54,638 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:54,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:21:54,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17193623] [2021-06-06 00:21:54,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17193623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:54,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467362166] [2021-06-06 00:21:54,638 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 [2021-06-06 00:21:54,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:21:54,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:21:54,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:21:54,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:21:54,754 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:21:54,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467362166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:21:54,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:21:54,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:21:54,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60845297] [2021-06-06 00:21:54,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:21:54,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:21:54,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:21:54,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:21:54,755 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) [2021-06-06 00:21:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:21:56,540 INFO L93 Difference]: Finished difference Result 166177 states and 481337 transitions. [2021-06-06 00:21:56,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-06 00:21:56,541 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 [2021-06-06 00:21:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:21:56,866 INFO L225 Difference]: With dead ends: 166177 [2021-06-06 00:21:56,866 INFO L226 Difference]: Without dead ends: 166177 [2021-06-06 00:21:56,866 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 458.7ms TimeCoverageRelationStatistics Valid=1028, Invalid=2278, Unknown=0, NotChecked=0, Total=3306 [2021-06-06 00:21:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166177 states. [2021-06-06 00:21:59,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166177 to 144218. [2021-06-06 00:21:59,625 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) [2021-06-06 00:22:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144218 states to 144218 states and 420945 transitions. [2021-06-06 00:22:00,473 INFO L78 Accepts]: Start accepts. Automaton has 144218 states and 420945 transitions. Word has length 43 [2021-06-06 00:22:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:00,473 INFO L482 AbstractCegarLoop]: Abstraction has 144218 states and 420945 transitions. [2021-06-06 00:22:00,473 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) [2021-06-06 00:22:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 144218 states and 420945 transitions. [2021-06-06 00:22:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:22:00,760 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:00,760 INFO L554 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] [2021-06-06 00:22:00,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-06 00:22:00,960 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:00,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:00,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1895135802, now seen corresponding path program 172 times [2021-06-06 00:22:00,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:00,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280853158] [2021-06-06 00:22:00,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:00,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:00,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280853158] [2021-06-06 00:22:00,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280853158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:00,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317507774] [2021-06-06 00:22:00,998 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 [2021-06-06 00:22:01,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:22:01,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:01,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:22:01,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:01,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317507774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:01,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:01,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:22:01,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198573668] [2021-06-06 00:22:01,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:22:01,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:01,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:22:01,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:22:01,113 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) [2021-06-06 00:22:02,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:02,079 INFO L93 Difference]: Finished difference Result 174051 states and 506409 transitions. [2021-06-06 00:22:02,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:22:02,079 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 [2021-06-06 00:22:02,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:02,398 INFO L225 Difference]: With dead ends: 174051 [2021-06-06 00:22:02,398 INFO L226 Difference]: Without dead ends: 173979 [2021-06-06 00:22:02,398 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 314.0ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-06-06 00:22:03,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173979 states. [2021-06-06 00:22:05,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173979 to 148690. [2021-06-06 00:22:05,927 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) [2021-06-06 00:22:06,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148690 states to 148690 states and 434203 transitions. [2021-06-06 00:22:06,305 INFO L78 Accepts]: Start accepts. Automaton has 148690 states and 434203 transitions. Word has length 43 [2021-06-06 00:22:06,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:06,306 INFO L482 AbstractCegarLoop]: Abstraction has 148690 states and 434203 transitions. [2021-06-06 00:22:06,306 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) [2021-06-06 00:22:06,306 INFO L276 IsEmpty]: Start isEmpty. Operand 148690 states and 434203 transitions. [2021-06-06 00:22:06,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:22:06,542 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:06,542 INFO L554 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] [2021-06-06 00:22:06,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:06,743 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:06,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:06,743 INFO L82 PathProgramCache]: Analyzing trace with hash 562421890, now seen corresponding path program 173 times [2021-06-06 00:22:06,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:06,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213873835] [2021-06-06 00:22:06,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:06,787 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:06,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:06,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213873835] [2021-06-06 00:22:06,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213873835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:06,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157630380] [2021-06-06 00:22:06,787 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 [2021-06-06 00:22:06,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:22:06,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:06,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:22:06,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:07,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157630380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:07,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:07,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:22:07,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116196715] [2021-06-06 00:22:07,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:22:07,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:07,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:22:07,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:22:07,561 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) [2021-06-06 00:22:08,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:08,915 INFO L93 Difference]: Finished difference Result 170083 states and 494122 transitions. [2021-06-06 00:22:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:22:08,916 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 [2021-06-06 00:22:08,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:09,251 INFO L225 Difference]: With dead ends: 170083 [2021-06-06 00:22:09,251 INFO L226 Difference]: Without dead ends: 170083 [2021-06-06 00:22:09,251 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 517.4ms TimeCoverageRelationStatistics Valid=1199, Invalid=2341, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:22:09,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170083 states. [2021-06-06 00:22:12,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170083 to 155420. [2021-06-06 00:22:12,768 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) [2021-06-06 00:22:13,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155420 states to 155420 states and 454842 transitions. [2021-06-06 00:22:13,142 INFO L78 Accepts]: Start accepts. Automaton has 155420 states and 454842 transitions. Word has length 43 [2021-06-06 00:22:13,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:13,142 INFO L482 AbstractCegarLoop]: Abstraction has 155420 states and 454842 transitions. [2021-06-06 00:22:13,142 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) [2021-06-06 00:22:13,142 INFO L276 IsEmpty]: Start isEmpty. Operand 155420 states and 454842 transitions. [2021-06-06 00:22:13,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:22:13,371 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:13,371 INFO L554 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] [2021-06-06 00:22:13,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-06-06 00:22:13,573 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:13,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:13,573 INFO L82 PathProgramCache]: Analyzing trace with hash 351724844, now seen corresponding path program 174 times [2021-06-06 00:22:13,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:13,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946537307] [2021-06-06 00:22:13,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:13,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:14,155 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-06-06 00:22:14,195 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:14,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:14,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946537307] [2021-06-06 00:22:14,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946537307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:14,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799992807] [2021-06-06 00:22:14,196 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 [2021-06-06 00:22:14,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-06 00:22:14,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:14,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:22:14,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:14,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799992807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:14,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:14,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:22:14,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127076167] [2021-06-06 00:22:14,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:22:14,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:14,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:22:14,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:22:14,334 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) [2021-06-06 00:22:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:15,526 INFO L93 Difference]: Finished difference Result 180254 states and 524821 transitions. [2021-06-06 00:22:15,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-06 00:22:15,527 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 [2021-06-06 00:22:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:15,870 INFO L225 Difference]: With dead ends: 180254 [2021-06-06 00:22:15,870 INFO L226 Difference]: Without dead ends: 180236 [2021-06-06 00:22:15,870 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 387.9ms TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:22:16,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180236 states. [2021-06-06 00:22:19,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180236 to 158892. [2021-06-06 00:22:19,463 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) [2021-06-06 00:22:19,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158892 states to 158892 states and 465158 transitions. [2021-06-06 00:22:19,857 INFO L78 Accepts]: Start accepts. Automaton has 158892 states and 465158 transitions. Word has length 43 [2021-06-06 00:22:19,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:19,858 INFO L482 AbstractCegarLoop]: Abstraction has 158892 states and 465158 transitions. [2021-06-06 00:22:19,858 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) [2021-06-06 00:22:19,858 INFO L276 IsEmpty]: Start isEmpty. Operand 158892 states and 465158 transitions. [2021-06-06 00:22:20,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:22:20,813 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:20,813 INFO L554 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] [2021-06-06 00:22:21,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:21,049 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:21,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:21,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1080476662, now seen corresponding path program 175 times [2021-06-06 00:22:21,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:21,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220490581] [2021-06-06 00:22:21,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:21,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:21,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220490581] [2021-06-06 00:22:21,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220490581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:21,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575994144] [2021-06-06 00:22:21,086 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 [2021-06-06 00:22:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:21,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:22:21,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:21,202 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:21,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575994144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:21,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:21,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:22:21,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272835788] [2021-06-06 00:22:21,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:22:21,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:21,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:22:21,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:22:21,203 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) [2021-06-06 00:22:22,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:22,548 INFO L93 Difference]: Finished difference Result 178308 states and 515729 transitions. [2021-06-06 00:22:22,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-06-06 00:22:22,549 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 [2021-06-06 00:22:22,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:22,885 INFO L225 Difference]: With dead ends: 178308 [2021-06-06 00:22:22,885 INFO L226 Difference]: Without dead ends: 178273 [2021-06-06 00:22:22,885 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1786 ImplicationChecksByTransitivity, 552.2ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-06-06 00:22:23,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178273 states. [2021-06-06 00:22:26,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178273 to 151546. [2021-06-06 00:22:26,522 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) [2021-06-06 00:22:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151546 states to 151546 states and 441795 transitions. [2021-06-06 00:22:26,915 INFO L78 Accepts]: Start accepts. Automaton has 151546 states and 441795 transitions. Word has length 43 [2021-06-06 00:22:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:26,915 INFO L482 AbstractCegarLoop]: Abstraction has 151546 states and 441795 transitions. [2021-06-06 00:22:26,915 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) [2021-06-06 00:22:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 151546 states and 441795 transitions. [2021-06-06 00:22:27,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:22:27,770 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:27,770 INFO L554 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] [2021-06-06 00:22:27,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:27,993 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:27,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:27,994 INFO L82 PathProgramCache]: Analyzing trace with hash 703505508, now seen corresponding path program 176 times [2021-06-06 00:22:27,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:27,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639227662] [2021-06-06 00:22:27,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:28,031 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:28,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:28,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639227662] [2021-06-06 00:22:28,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639227662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:28,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875906101] [2021-06-06 00:22:28,031 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 [2021-06-06 00:22:28,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:22:28,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:28,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:22:28,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:28,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875906101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:28,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:28,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-06 00:22:28,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527463897] [2021-06-06 00:22:28,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:22:28,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:28,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:22:28,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:22:28,141 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) [2021-06-06 00:22:29,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:29,161 INFO L93 Difference]: Finished difference Result 159858 states and 464095 transitions. [2021-06-06 00:22:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:22:29,162 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 [2021-06-06 00:22:29,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:29,458 INFO L225 Difference]: With dead ends: 159858 [2021-06-06 00:22:29,459 INFO L226 Difference]: Without dead ends: 159844 [2021-06-06 00:22:29,459 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 315.4ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:22:30,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159844 states. [2021-06-06 00:22:32,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159844 to 130016. [2021-06-06 00:22:32,614 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) [2021-06-06 00:22:32,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130016 states to 130016 states and 378076 transitions. [2021-06-06 00:22:32,925 INFO L78 Accepts]: Start accepts. Automaton has 130016 states and 378076 transitions. Word has length 43 [2021-06-06 00:22:32,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:32,925 INFO L482 AbstractCegarLoop]: Abstraction has 130016 states and 378076 transitions. [2021-06-06 00:22:32,925 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) [2021-06-06 00:22:32,925 INFO L276 IsEmpty]: Start isEmpty. Operand 130016 states and 378076 transitions. [2021-06-06 00:22:33,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:22:33,099 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:33,099 INFO L554 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] [2021-06-06 00:22:33,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:33,299 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:33,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:33,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1361898402, now seen corresponding path program 177 times [2021-06-06 00:22:33,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:33,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112759632] [2021-06-06 00:22:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:33,340 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:33,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:33,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112759632] [2021-06-06 00:22:33,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112759632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:33,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558844983] [2021-06-06 00:22:33,341 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 [2021-06-06 00:22:33,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:22:33,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:33,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:22:33,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:33,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558844983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:33,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:33,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:22:33,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390448702] [2021-06-06 00:22:33,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:22:33,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:33,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:22:33,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:22:33,466 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) [2021-06-06 00:22:34,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:34,964 INFO L93 Difference]: Finished difference Result 144036 states and 416535 transitions. [2021-06-06 00:22:34,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-06 00:22:34,965 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 [2021-06-06 00:22:34,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:35,254 INFO L225 Difference]: With dead ends: 144036 [2021-06-06 00:22:35,255 INFO L226 Difference]: Without dead ends: 143970 [2021-06-06 00:22:35,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 340.1ms TimeCoverageRelationStatistics Valid=631, Invalid=1439, Unknown=0, NotChecked=0, Total=2070 [2021-06-06 00:22:35,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143970 states. [2021-06-06 00:22:37,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143970 to 129574. [2021-06-06 00:22:37,746 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) [2021-06-06 00:22:38,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129574 states to 129574 states and 376873 transitions. [2021-06-06 00:22:38,079 INFO L78 Accepts]: Start accepts. Automaton has 129574 states and 376873 transitions. Word has length 43 [2021-06-06 00:22:38,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:38,079 INFO L482 AbstractCegarLoop]: Abstraction has 129574 states and 376873 transitions. [2021-06-06 00:22:38,079 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) [2021-06-06 00:22:38,079 INFO L276 IsEmpty]: Start isEmpty. Operand 129574 states and 376873 transitions. [2021-06-06 00:22:38,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:22:38,282 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:38,282 INFO L554 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] [2021-06-06 00:22:38,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:22:38,483 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:38,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1179331944, now seen corresponding path program 178 times [2021-06-06 00:22:38,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:38,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502999758] [2021-06-06 00:22:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:38,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:38,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502999758] [2021-06-06 00:22:38,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502999758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:38,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926618242] [2021-06-06 00:22:38,518 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 [2021-06-06 00:22:38,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:22:38,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:38,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:22:38,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:38,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926618242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:38,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:38,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-06 00:22:38,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492103818] [2021-06-06 00:22:38,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:22:38,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:38,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:22:38,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:22:38,637 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) [2021-06-06 00:22:40,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:40,600 INFO L93 Difference]: Finished difference Result 150350 states and 434516 transitions. [2021-06-06 00:22:40,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:22:40,600 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 [2021-06-06 00:22:40,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:41,008 INFO L225 Difference]: With dead ends: 150350 [2021-06-06 00:22:41,008 INFO L226 Difference]: Without dead ends: 150320 [2021-06-06 00:22:41,009 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 370.4ms TimeCoverageRelationStatistics Valid=682, Invalid=1574, Unknown=0, NotChecked=0, Total=2256 [2021-06-06 00:22:41,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150320 states. [2021-06-06 00:22:43,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150320 to 131074. [2021-06-06 00:22:43,502 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) [2021-06-06 00:22:43,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131074 states to 131074 states and 381207 transitions. [2021-06-06 00:22:43,810 INFO L78 Accepts]: Start accepts. Automaton has 131074 states and 381207 transitions. Word has length 43 [2021-06-06 00:22:43,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:43,811 INFO L482 AbstractCegarLoop]: Abstraction has 131074 states and 381207 transitions. [2021-06-06 00:22:43,811 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) [2021-06-06 00:22:43,811 INFO L276 IsEmpty]: Start isEmpty. Operand 131074 states and 381207 transitions. [2021-06-06 00:22:43,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:22:43,993 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:43,993 INFO L554 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] [2021-06-06 00:22:44,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2021-06-06 00:22:44,194 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:44,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:44,194 INFO L82 PathProgramCache]: Analyzing trace with hash 81707166, now seen corresponding path program 179 times [2021-06-06 00:22:44,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:44,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890474062] [2021-06-06 00:22:44,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:44,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:44,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890474062] [2021-06-06 00:22:44,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890474062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:44,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254778240] [2021-06-06 00:22:44,231 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 [2021-06-06 00:22:44,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:22:44,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:44,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:22:44,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:44,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254778240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:44,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:44,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-06 00:22:44,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078130928] [2021-06-06 00:22:44,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:22:44,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:44,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:22:44,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:22:44,352 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) [2021-06-06 00:22:46,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:46,053 INFO L93 Difference]: Finished difference Result 165836 states and 478197 transitions. [2021-06-06 00:22:46,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-06 00:22:46,054 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 [2021-06-06 00:22:46,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:46,367 INFO L225 Difference]: With dead ends: 165836 [2021-06-06 00:22:46,368 INFO L226 Difference]: Without dead ends: 165824 [2021-06-06 00:22:46,368 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 468.5ms TimeCoverageRelationStatistics Valid=983, Invalid=2097, Unknown=0, NotChecked=0, Total=3080 [2021-06-06 00:22:46,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165824 states. [2021-06-06 00:22:49,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165824 to 132962. [2021-06-06 00:22:49,285 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) [2021-06-06 00:22:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132962 states to 132962 states and 386479 transitions. [2021-06-06 00:22:50,037 INFO L78 Accepts]: Start accepts. Automaton has 132962 states and 386479 transitions. Word has length 43 [2021-06-06 00:22:50,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:50,037 INFO L482 AbstractCegarLoop]: Abstraction has 132962 states and 386479 transitions. [2021-06-06 00:22:50,037 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) [2021-06-06 00:22:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 132962 states and 386479 transitions. [2021-06-06 00:22:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:22:50,224 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:50,224 INFO L554 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] [2021-06-06 00:22:50,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-06-06 00:22:50,425 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:50,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:50,425 INFO L82 PathProgramCache]: Analyzing trace with hash 981002536, now seen corresponding path program 180 times [2021-06-06 00:22:50,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:50,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477181100] [2021-06-06 00:22:50,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:50,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:50,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:50,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477181100] [2021-06-06 00:22:50,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477181100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:50,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828495300] [2021-06-06 00:22:50,460 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 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 [2021-06-06 00:22:50,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:22:50,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:22:50,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:22:50,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:50,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828495300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:50,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:50,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-06 00:22:50,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417922672] [2021-06-06 00:22:50,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:22:50,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:50,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:22:50,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:22:50,579 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) [2021-06-06 00:22:52,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:52,265 INFO L93 Difference]: Finished difference Result 162439 states and 469100 transitions. [2021-06-06 00:22:52,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-06 00:22:52,266 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 [2021-06-06 00:22:52,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:52,588 INFO L225 Difference]: With dead ends: 162439 [2021-06-06 00:22:52,588 INFO L226 Difference]: Without dead ends: 162439 [2021-06-06 00:22:52,589 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 461.5ms TimeCoverageRelationStatistics Valid=1190, Invalid=2350, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:22:52,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162439 states. [2021-06-06 00:22:55,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162439 to 140434. [2021-06-06 00:22:55,334 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) [2021-06-06 00:22:55,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140434 states to 140434 states and 408821 transitions. [2021-06-06 00:22:55,665 INFO L78 Accepts]: Start accepts. Automaton has 140434 states and 408821 transitions. Word has length 43 [2021-06-06 00:22:55,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:22:55,665 INFO L482 AbstractCegarLoop]: Abstraction has 140434 states and 408821 transitions. [2021-06-06 00:22:55,665 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) [2021-06-06 00:22:55,665 INFO L276 IsEmpty]: Start isEmpty. Operand 140434 states and 408821 transitions. [2021-06-06 00:22:56,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:22:56,390 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:22:56,390 INFO L554 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] [2021-06-06 00:22:56,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-06-06 00:22:56,597 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:22:56,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:22:56,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1122086154, now seen corresponding path program 181 times [2021-06-06 00:22:56,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:22:56,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801109112] [2021-06-06 00:22:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:22:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:22:56,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:22:56,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801109112] [2021-06-06 00:22:56,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801109112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:56,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665684627] [2021-06-06 00:22:56,631 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 [2021-06-06 00:22:56,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:22:56,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:22:56,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:22:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:22:56,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665684627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:22:56,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:22:56,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-06-06 00:22:56,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5037523] [2021-06-06 00:22:56,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:22:56,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:22:56,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:22:56,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:22:56,752 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) [2021-06-06 00:22:57,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:22:57,799 INFO L93 Difference]: Finished difference Result 157083 states and 454504 transitions. [2021-06-06 00:22:57,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-06 00:22:57,799 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 [2021-06-06 00:22:57,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:22:58,102 INFO L225 Difference]: With dead ends: 157083 [2021-06-06 00:22:58,102 INFO L226 Difference]: Without dead ends: 157062 [2021-06-06 00:22:58,102 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=847, Invalid=1703, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:22:58,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157062 states. [2021-06-06 00:23:01,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157062 to 122230. [2021-06-06 00:23:01,232 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) [2021-06-06 00:23:01,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122230 states to 122230 states and 354627 transitions. [2021-06-06 00:23:01,521 INFO L78 Accepts]: Start accepts. Automaton has 122230 states and 354627 transitions. Word has length 43 [2021-06-06 00:23:01,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:01,521 INFO L482 AbstractCegarLoop]: Abstraction has 122230 states and 354627 transitions. [2021-06-06 00:23:01,521 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) [2021-06-06 00:23:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 122230 states and 354627 transitions. [2021-06-06 00:23:01,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:23:01,684 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:01,684 INFO L554 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] [2021-06-06 00:23:01,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-06 00:23:01,885 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:01,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:01,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1206484928, now seen corresponding path program 182 times [2021-06-06 00:23:01,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:01,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699878774] [2021-06-06 00:23:01,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:01,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:01,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699878774] [2021-06-06 00:23:01,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699878774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:01,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738154556] [2021-06-06 00:23:01,923 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 [2021-06-06 00:23:01,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:01,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:01,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:23:01,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:02,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738154556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:02,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:02,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-06 00:23:02,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284741433] [2021-06-06 00:23:02,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:23:02,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:02,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:23:02,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:23:02,038 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) [2021-06-06 00:23:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:03,472 INFO L93 Difference]: Finished difference Result 142842 states and 411920 transitions. [2021-06-06 00:23:03,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-06 00:23:03,472 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 [2021-06-06 00:23:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:03,741 INFO L225 Difference]: With dead ends: 142842 [2021-06-06 00:23:03,741 INFO L226 Difference]: Without dead ends: 142786 [2021-06-06 00:23:03,741 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 330.2ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:23:03,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142786 states. [2021-06-06 00:23:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142786 to 120606. [2021-06-06 00:23:06,198 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) [2021-06-06 00:23:06,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120606 states to 120606 states and 350677 transitions. [2021-06-06 00:23:06,487 INFO L78 Accepts]: Start accepts. Automaton has 120606 states and 350677 transitions. Word has length 43 [2021-06-06 00:23:06,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:06,487 INFO L482 AbstractCegarLoop]: Abstraction has 120606 states and 350677 transitions. [2021-06-06 00:23:06,487 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) [2021-06-06 00:23:06,487 INFO L276 IsEmpty]: Start isEmpty. Operand 120606 states and 350677 transitions. [2021-06-06 00:23:06,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:23:06,662 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:06,662 INFO L554 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] [2021-06-06 00:23:06,871 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-06 00:23:06,872 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:06,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:06,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1475403872, now seen corresponding path program 183 times [2021-06-06 00:23:06,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:06,872 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836382267] [2021-06-06 00:23:06,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:06,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:06,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:06,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836382267] [2021-06-06 00:23:06,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836382267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:06,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331130944] [2021-06-06 00:23:06,917 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 [2021-06-06 00:23:06,957 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:23:06,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:06,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:23:06,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:07,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331130944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:07,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:07,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:23:07,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745481270] [2021-06-06 00:23:07,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:23:07,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:07,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:23:07,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:23:07,064 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) [2021-06-06 00:23:08,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:08,569 INFO L93 Difference]: Finished difference Result 132227 states and 382026 transitions. [2021-06-06 00:23:08,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:23:08,570 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 [2021-06-06 00:23:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:08,811 INFO L225 Difference]: With dead ends: 132227 [2021-06-06 00:23:08,811 INFO L226 Difference]: Without dead ends: 132161 [2021-06-06 00:23:08,811 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 416.1ms TimeCoverageRelationStatistics Valid=676, Invalid=1676, Unknown=0, NotChecked=0, Total=2352 [2021-06-06 00:23:08,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132161 states. [2021-06-06 00:23:11,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132161 to 119216. [2021-06-06 00:23:11,255 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) [2021-06-06 00:23:11,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119216 states to 119216 states and 346560 transitions. [2021-06-06 00:23:11,547 INFO L78 Accepts]: Start accepts. Automaton has 119216 states and 346560 transitions. Word has length 43 [2021-06-06 00:23:11,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:11,547 INFO L482 AbstractCegarLoop]: Abstraction has 119216 states and 346560 transitions. [2021-06-06 00:23:11,548 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) [2021-06-06 00:23:11,548 INFO L276 IsEmpty]: Start isEmpty. Operand 119216 states and 346560 transitions. [2021-06-06 00:23:11,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:23:11,721 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:11,721 INFO L554 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] [2021-06-06 00:23:11,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:11,921 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:11,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:11,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1857040322, now seen corresponding path program 184 times [2021-06-06 00:23:11,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:11,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044764448] [2021-06-06 00:23:11,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:11,953 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:11,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:11,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044764448] [2021-06-06 00:23:11,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044764448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:11,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661766222] [2021-06-06 00:23:11,954 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 [2021-06-06 00:23:11,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:23:11,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:11,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:23:11,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:12,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661766222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:12,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:12,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-06 00:23:12,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662389111] [2021-06-06 00:23:12,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:23:12,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:12,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:23:12,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:23:12,078 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) [2021-06-06 00:23:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:13,620 INFO L93 Difference]: Finished difference Result 148054 states and 426823 transitions. [2021-06-06 00:23:13,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:23:13,620 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 [2021-06-06 00:23:13,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:13,887 INFO L225 Difference]: With dead ends: 148054 [2021-06-06 00:23:13,887 INFO L226 Difference]: Without dead ends: 148024 [2021-06-06 00:23:13,887 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 388.7ms TimeCoverageRelationStatistics Valid=732, Invalid=1718, Unknown=0, NotChecked=0, Total=2450 [2021-06-06 00:23:14,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148024 states. [2021-06-06 00:23:16,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148024 to 120930. [2021-06-06 00:23:16,455 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) [2021-06-06 00:23:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120930 states to 120930 states and 351259 transitions. [2021-06-06 00:23:16,732 INFO L78 Accepts]: Start accepts. Automaton has 120930 states and 351259 transitions. Word has length 43 [2021-06-06 00:23:16,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:16,732 INFO L482 AbstractCegarLoop]: Abstraction has 120930 states and 351259 transitions. [2021-06-06 00:23:16,732 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) [2021-06-06 00:23:16,732 INFO L276 IsEmpty]: Start isEmpty. Operand 120930 states and 351259 transitions. [2021-06-06 00:23:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:23:16,897 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:16,897 INFO L554 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] [2021-06-06 00:23:17,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:17,098 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:17,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:17,098 INFO L82 PathProgramCache]: Analyzing trace with hash 228319968, now seen corresponding path program 185 times [2021-06-06 00:23:17,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:17,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427992461] [2021-06-06 00:23:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:17,126 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:17,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:17,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427992461] [2021-06-06 00:23:17,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427992461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:17,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450816894] [2021-06-06 00:23:17,126 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 [2021-06-06 00:23:17,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:23:17,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:17,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:23:17,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:17,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450816894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:17,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:17,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-06 00:23:17,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97061482] [2021-06-06 00:23:17,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:23:17,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:17,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:23:17,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:23:17,248 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) [2021-06-06 00:23:18,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:18,905 INFO L93 Difference]: Finished difference Result 167645 states and 483468 transitions. [2021-06-06 00:23:18,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:23:18,906 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 [2021-06-06 00:23:18,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:19,223 INFO L225 Difference]: With dead ends: 167645 [2021-06-06 00:23:19,223 INFO L226 Difference]: Without dead ends: 167639 [2021-06-06 00:23:19,224 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 488.2ms TimeCoverageRelationStatistics Valid=975, Invalid=1995, Unknown=0, NotChecked=0, Total=2970 [2021-06-06 00:23:19,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167639 states. [2021-06-06 00:23:22,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167639 to 127822. [2021-06-06 00:23:22,176 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) [2021-06-06 00:23:22,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127822 states to 127822 states and 371049 transitions. [2021-06-06 00:23:22,891 INFO L78 Accepts]: Start accepts. Automaton has 127822 states and 371049 transitions. Word has length 43 [2021-06-06 00:23:22,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:22,891 INFO L482 AbstractCegarLoop]: Abstraction has 127822 states and 371049 transitions. [2021-06-06 00:23:22,891 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) [2021-06-06 00:23:22,891 INFO L276 IsEmpty]: Start isEmpty. Operand 127822 states and 371049 transitions. [2021-06-06 00:23:23,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:23:23,050 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:23,050 INFO L554 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] [2021-06-06 00:23:23,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-06 00:23:23,250 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:23,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:23,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1707881602, now seen corresponding path program 186 times [2021-06-06 00:23:23,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:23,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750537692] [2021-06-06 00:23:23,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:23,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:23,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750537692] [2021-06-06 00:23:23,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750537692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:23,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360298065] [2021-06-06 00:23:23,279 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 [2021-06-06 00:23:23,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-06 00:23:23,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:23,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:23:23,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:23,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360298065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:23,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:23,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-06 00:23:23,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764945471] [2021-06-06 00:23:23,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:23:23,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:23,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:23:23,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:23:23,401 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) [2021-06-06 00:23:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:25,198 INFO L93 Difference]: Finished difference Result 170745 states and 491050 transitions. [2021-06-06 00:23:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-06 00:23:25,199 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 [2021-06-06 00:23:25,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:25,524 INFO L225 Difference]: With dead ends: 170745 [2021-06-06 00:23:25,524 INFO L226 Difference]: Without dead ends: 170745 [2021-06-06 00:23:25,524 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 566.9ms TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2021-06-06 00:23:25,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170745 states. [2021-06-06 00:23:28,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170745 to 138414. [2021-06-06 00:23:28,411 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) [2021-06-06 00:23:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138414 states to 138414 states and 402087 transitions. [2021-06-06 00:23:29,186 INFO L78 Accepts]: Start accepts. Automaton has 138414 states and 402087 transitions. Word has length 43 [2021-06-06 00:23:29,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:29,186 INFO L482 AbstractCegarLoop]: Abstraction has 138414 states and 402087 transitions. [2021-06-06 00:23:29,186 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) [2021-06-06 00:23:29,186 INFO L276 IsEmpty]: Start isEmpty. Operand 138414 states and 402087 transitions. [2021-06-06 00:23:29,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:23:29,415 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:29,415 INFO L554 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] [2021-06-06 00:23:29,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:29,616 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:29,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:29,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1848965220, now seen corresponding path program 187 times [2021-06-06 00:23:29,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:29,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403605799] [2021-06-06 00:23:29,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:29,644 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:23:29,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:29,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403605799] [2021-06-06 00:23:29,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403605799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:29,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482067044] [2021-06-06 00:23:29,645 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 [2021-06-06 00:23:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:29,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:23:29,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:29,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482067044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:29,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:29,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-06-06 00:23:29,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257113106] [2021-06-06 00:23:29,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:23:29,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:29,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:23:29,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:23:29,771 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) [2021-06-06 00:23:30,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:30,868 INFO L93 Difference]: Finished difference Result 166155 states and 478574 transitions. [2021-06-06 00:23:30,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-06 00:23:30,868 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 [2021-06-06 00:23:30,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:31,794 INFO L225 Difference]: With dead ends: 166155 [2021-06-06 00:23:31,795 INFO L226 Difference]: Without dead ends: 166134 [2021-06-06 00:23:31,795 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 430.6ms TimeCoverageRelationStatistics Valid=1030, Invalid=2162, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:23:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166134 states. [2021-06-06 00:23:34,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166134 to 132754. [2021-06-06 00:23:34,356 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) [2021-06-06 00:23:34,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132754 states to 132754 states and 385071 transitions. [2021-06-06 00:23:34,674 INFO L78 Accepts]: Start accepts. Automaton has 132754 states and 385071 transitions. Word has length 43 [2021-06-06 00:23:34,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:34,674 INFO L482 AbstractCegarLoop]: Abstraction has 132754 states and 385071 transitions. [2021-06-06 00:23:34,675 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) [2021-06-06 00:23:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 132754 states and 385071 transitions. [2021-06-06 00:23:34,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:23:34,853 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:34,853 INFO L554 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] [2021-06-06 00:23:35,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:35,054 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:35,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:35,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1933363994, now seen corresponding path program 188 times [2021-06-06 00:23:35,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:35,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766983625] [2021-06-06 00:23:35,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:23:35,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:35,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766983625] [2021-06-06 00:23:35,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766983625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:35,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997670928] [2021-06-06 00:23:35,087 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 [2021-06-06 00:23:35,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:23:35,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:35,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:23:35,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:35,216 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:35,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997670928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:35,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:35,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-06 00:23:35,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851052316] [2021-06-06 00:23:35,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:23:35,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:35,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:23:35,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:23:35,217 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) [2021-06-06 00:23:35,809 WARN L205 SmtUtils]: Spent 557.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-06 00:23:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:36,914 INFO L93 Difference]: Finished difference Result 165237 states and 475345 transitions. [2021-06-06 00:23:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-06 00:23:36,915 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 [2021-06-06 00:23:36,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:37,222 INFO L225 Difference]: With dead ends: 165237 [2021-06-06 00:23:37,222 INFO L226 Difference]: Without dead ends: 165153 [2021-06-06 00:23:37,223 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1034.8ms TimeCoverageRelationStatistics Valid=877, Invalid=1985, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:23:37,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165153 states. [2021-06-06 00:23:40,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165153 to 132063. [2021-06-06 00:23:40,894 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) [2021-06-06 00:23:41,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132063 states to 132063 states and 383291 transitions. [2021-06-06 00:23:41,410 INFO L78 Accepts]: Start accepts. Automaton has 132063 states and 383291 transitions. Word has length 43 [2021-06-06 00:23:41,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:41,410 INFO L482 AbstractCegarLoop]: Abstraction has 132063 states and 383291 transitions. [2021-06-06 00:23:41,410 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) [2021-06-06 00:23:41,410 INFO L276 IsEmpty]: Start isEmpty. Operand 132063 states and 383291 transitions. [2021-06-06 00:23:41,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:23:41,643 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:41,643 INFO L554 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] [2021-06-06 00:23:41,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:41,867 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:41,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:41,867 INFO L82 PathProgramCache]: Analyzing trace with hash -721565792, now seen corresponding path program 189 times [2021-06-06 00:23:41,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:41,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897250850] [2021-06-06 00:23:41,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:41,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:41,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897250850] [2021-06-06 00:23:41,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897250850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:41,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872155850] [2021-06-06 00:23:41,909 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 [2021-06-06 00:23:41,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-06 00:23:41,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:41,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:23:41,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:42,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872155850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:42,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:42,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-06 00:23:42,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967470937] [2021-06-06 00:23:42,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:23:42,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:42,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:23:42,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:23:42,065 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) [2021-06-06 00:23:43,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:43,628 INFO L93 Difference]: Finished difference Result 165113 states and 474768 transitions. [2021-06-06 00:23:43,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-06 00:23:43,641 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 [2021-06-06 00:23:43,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:43,985 INFO L225 Difference]: With dead ends: 165113 [2021-06-06 00:23:43,985 INFO L226 Difference]: Without dead ends: 165015 [2021-06-06 00:23:43,985 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 418.8ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:23:44,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165015 states. [2021-06-06 00:23:46,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165015 to 133988. [2021-06-06 00:23:46,630 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) [2021-06-06 00:23:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133988 states to 133988 states and 389060 transitions. [2021-06-06 00:23:46,931 INFO L78 Accepts]: Start accepts. Automaton has 133988 states and 389060 transitions. Word has length 43 [2021-06-06 00:23:46,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:46,931 INFO L482 AbstractCegarLoop]: Abstraction has 133988 states and 389060 transitions. [2021-06-06 00:23:46,931 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) [2021-06-06 00:23:46,931 INFO L276 IsEmpty]: Start isEmpty. Operand 133988 states and 389060 transitions. [2021-06-06 00:23:47,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:23:47,113 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:47,113 INFO L554 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] [2021-06-06 00:23:47,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:23:47,314 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:47,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:47,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1517368606, now seen corresponding path program 190 times [2021-06-06 00:23:47,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:47,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796153535] [2021-06-06 00:23:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:47,920 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:47,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:47,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796153535] [2021-06-06 00:23:47,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796153535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:47,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788821217] [2021-06-06 00:23:47,920 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 [2021-06-06 00:23:47,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:23:47,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:47,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:23:47,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:48,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788821217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:48,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:48,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:23:48,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970797926] [2021-06-06 00:23:48,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:23:48,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:48,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:23:48,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:23:48,096 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) [2021-06-06 00:23:49,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:49,182 INFO L93 Difference]: Finished difference Result 149805 states and 432340 transitions. [2021-06-06 00:23:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-06 00:23:49,183 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 [2021-06-06 00:23:49,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:49,468 INFO L225 Difference]: With dead ends: 149805 [2021-06-06 00:23:49,468 INFO L226 Difference]: Without dead ends: 149739 [2021-06-06 00:23:49,469 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1024.6ms TimeCoverageRelationStatistics Valid=708, Invalid=1842, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:23:49,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149739 states. [2021-06-06 00:23:52,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149739 to 136196. [2021-06-06 00:23:52,709 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) [2021-06-06 00:23:53,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136196 states to 136196 states and 395014 transitions. [2021-06-06 00:23:53,070 INFO L78 Accepts]: Start accepts. Automaton has 136196 states and 395014 transitions. Word has length 43 [2021-06-06 00:23:53,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:53,070 INFO L482 AbstractCegarLoop]: Abstraction has 136196 states and 395014 transitions. [2021-06-06 00:23:53,070 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) [2021-06-06 00:23:53,070 INFO L276 IsEmpty]: Start isEmpty. Operand 136196 states and 395014 transitions. [2021-06-06 00:23:53,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:23:53,262 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:53,263 INFO L554 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] [2021-06-06 00:23:53,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-06-06 00:23:53,463 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:53,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:53,463 INFO L82 PathProgramCache]: Analyzing trace with hash 826070824, now seen corresponding path program 191 times [2021-06-06 00:23:53,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:53,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233217433] [2021-06-06 00:23:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:53,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:53,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233217433] [2021-06-06 00:23:53,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233217433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:53,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825911253] [2021-06-06 00:23:53,510 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 [2021-06-06 00:23:53,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:23:53,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:53,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:23:53,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:53,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825911253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:53,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:53,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-06 00:23:53,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550566081] [2021-06-06 00:23:53,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:23:53,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:53,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:23:53,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:23:53,645 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) [2021-06-06 00:23:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:23:55,319 INFO L93 Difference]: Finished difference Result 170919 states and 492163 transitions. [2021-06-06 00:23:55,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-06 00:23:55,320 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 [2021-06-06 00:23:55,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:23:55,659 INFO L225 Difference]: With dead ends: 170919 [2021-06-06 00:23:55,659 INFO L226 Difference]: Without dead ends: 170889 [2021-06-06 00:23:55,660 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 432.0ms TimeCoverageRelationStatistics Valid=809, Invalid=2053, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:23:55,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170889 states. [2021-06-06 00:23:58,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170889 to 142906. [2021-06-06 00:23:58,364 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) [2021-06-06 00:23:58,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142906 states to 142906 states and 414445 transitions. [2021-06-06 00:23:58,719 INFO L78 Accepts]: Start accepts. Automaton has 142906 states and 414445 transitions. Word has length 43 [2021-06-06 00:23:58,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:23:58,719 INFO L482 AbstractCegarLoop]: Abstraction has 142906 states and 414445 transitions. [2021-06-06 00:23:58,719 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) [2021-06-06 00:23:58,719 INFO L276 IsEmpty]: Start isEmpty. Operand 142906 states and 414445 transitions. [2021-06-06 00:23:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:23:59,554 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:23:59,554 INFO L554 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] [2021-06-06 00:23:59,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-06 00:23:59,754 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:23:59,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:23:59,755 INFO L82 PathProgramCache]: Analyzing trace with hash -11435682, now seen corresponding path program 192 times [2021-06-06 00:23:59,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:23:59,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316323479] [2021-06-06 00:23:59,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:23:59,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:23:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:59,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:23:59,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316323479] [2021-06-06 00:23:59,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316323479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:59,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754514372] [2021-06-06 00:23:59,782 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 [2021-06-06 00:23:59,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:23:59,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:23:59,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:23:59,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:23:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:23:59,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754514372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:23:59,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:23:59,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-06 00:23:59,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029874333] [2021-06-06 00:23:59,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:23:59,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:23:59,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:23:59,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:23:59,915 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) [2021-06-06 00:24:01,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:01,184 INFO L93 Difference]: Finished difference Result 189714 states and 547144 transitions. [2021-06-06 00:24:01,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-06 00:24:01,184 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 [2021-06-06 00:24:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:02,155 INFO L225 Difference]: With dead ends: 189714 [2021-06-06 00:24:02,155 INFO L226 Difference]: Without dead ends: 189708 [2021-06-06 00:24:02,155 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 523.2ms TimeCoverageRelationStatistics Valid=1227, Invalid=2679, Unknown=0, NotChecked=0, Total=3906 [2021-06-06 00:24:02,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189708 states. [2021-06-06 00:24:04,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189708 to 154668. [2021-06-06 00:24:04,994 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) [2021-06-06 00:24:05,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154668 states to 154668 states and 448358 transitions. [2021-06-06 00:24:05,867 INFO L78 Accepts]: Start accepts. Automaton has 154668 states and 448358 transitions. Word has length 43 [2021-06-06 00:24:05,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:05,867 INFO L482 AbstractCegarLoop]: Abstraction has 154668 states and 448358 transitions. [2021-06-06 00:24:05,867 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) [2021-06-06 00:24:05,867 INFO L276 IsEmpty]: Start isEmpty. Operand 154668 states and 448358 transitions. [2021-06-06 00:24:06,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:24:06,153 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:06,153 INFO L554 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] [2021-06-06 00:24:06,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-06-06 00:24:06,354 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:06,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:06,354 INFO L82 PathProgramCache]: Analyzing trace with hash 937030376, now seen corresponding path program 193 times [2021-06-06 00:24:06,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:06,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530694668] [2021-06-06 00:24:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:06,381 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:06,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:06,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530694668] [2021-06-06 00:24:06,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530694668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:06,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073184660] [2021-06-06 00:24:06,382 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 [2021-06-06 00:24:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:06,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:24:06,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:06,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073184660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:06,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:06,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-06 00:24:06,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510199831] [2021-06-06 00:24:06,506 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:24:06,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:06,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:24:06,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:24:06,506 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) [2021-06-06 00:24:08,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:08,565 INFO L93 Difference]: Finished difference Result 222961 states and 642150 transitions. [2021-06-06 00:24:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-06 00:24:08,565 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 [2021-06-06 00:24:08,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:09,032 INFO L225 Difference]: With dead ends: 222961 [2021-06-06 00:24:09,032 INFO L226 Difference]: Without dead ends: 222961 [2021-06-06 00:24:09,033 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 543.8ms TimeCoverageRelationStatistics Valid=1414, Invalid=2876, Unknown=0, NotChecked=0, Total=4290 [2021-06-06 00:24:09,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222961 states. [2021-06-06 00:24:12,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222961 to 194204. [2021-06-06 00:24:12,912 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) [2021-06-06 00:24:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194204 states to 194204 states and 562474 transitions. [2021-06-06 00:24:14,083 INFO L78 Accepts]: Start accepts. Automaton has 194204 states and 562474 transitions. Word has length 43 [2021-06-06 00:24:14,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:14,083 INFO L482 AbstractCegarLoop]: Abstraction has 194204 states and 562474 transitions. [2021-06-06 00:24:14,083 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) [2021-06-06 00:24:14,083 INFO L276 IsEmpty]: Start isEmpty. Operand 194204 states and 562474 transitions. [2021-06-06 00:24:14,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:24:14,350 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:14,350 INFO L554 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] [2021-06-06 00:24:14,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:14,551 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:14,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:14,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1078113994, now seen corresponding path program 194 times [2021-06-06 00:24:14,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:14,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424492052] [2021-06-06 00:24:14,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:24:14,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:14,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424492052] [2021-06-06 00:24:14,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424492052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:14,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172117519] [2021-06-06 00:24:14,577 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 [2021-06-06 00:24:14,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:24:14,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:14,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:24:14,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:14,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172117519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:14,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:14,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-06-06 00:24:14,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889630298] [2021-06-06 00:24:14,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-06 00:24:14,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:14,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-06 00:24:14,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-06 00:24:14,724 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) [2021-06-06 00:24:16,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:16,713 INFO L93 Difference]: Finished difference Result 220222 states and 634358 transitions. [2021-06-06 00:24:16,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-06 00:24:16,714 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 [2021-06-06 00:24:16,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:17,170 INFO L225 Difference]: With dead ends: 220222 [2021-06-06 00:24:17,170 INFO L226 Difference]: Without dead ends: 220208 [2021-06-06 00:24:17,170 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 473.4ms TimeCoverageRelationStatistics Valid=1091, Invalid=2449, Unknown=0, NotChecked=0, Total=3540 [2021-06-06 00:24:17,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220208 states. [2021-06-06 00:24:20,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220208 to 192400. [2021-06-06 00:24:21,049 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) [2021-06-06 00:24:22,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192400 states to 192400 states and 557026 transitions. [2021-06-06 00:24:22,175 INFO L78 Accepts]: Start accepts. Automaton has 192400 states and 557026 transitions. Word has length 43 [2021-06-06 00:24:22,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:22,175 INFO L482 AbstractCegarLoop]: Abstraction has 192400 states and 557026 transitions. [2021-06-06 00:24:22,175 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) [2021-06-06 00:24:22,175 INFO L276 IsEmpty]: Start isEmpty. Operand 192400 states and 557026 transitions. [2021-06-06 00:24:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:24:22,435 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:22,435 INFO L554 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] [2021-06-06 00:24:22,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:22,635 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:22,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:22,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1162512768, now seen corresponding path program 195 times [2021-06-06 00:24:22,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:22,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476534198] [2021-06-06 00:24:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:24:22,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:22,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476534198] [2021-06-06 00:24:22,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476534198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:22,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817859674] [2021-06-06 00:24:22,665 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 [2021-06-06 00:24:22,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:24:22,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:22,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:24:22,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:22,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817859674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:22,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:22,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-06 00:24:22,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784265774] [2021-06-06 00:24:22,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:24:22,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:22,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:24:22,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:24:22,825 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) [2021-06-06 00:24:24,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:24,766 INFO L93 Difference]: Finished difference Result 221539 states and 638003 transitions. [2021-06-06 00:24:24,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-06 00:24:24,766 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 [2021-06-06 00:24:24,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:25,222 INFO L225 Difference]: With dead ends: 221539 [2021-06-06 00:24:25,222 INFO L226 Difference]: Without dead ends: 221483 [2021-06-06 00:24:25,222 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 444.5ms TimeCoverageRelationStatistics Valid=940, Invalid=2252, Unknown=0, NotChecked=0, Total=3192 [2021-06-06 00:24:25,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221483 states. [2021-06-06 00:24:28,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221483 to 195688. [2021-06-06 00:24:29,150 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) [2021-06-06 00:24:30,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195688 states to 195688 states and 566340 transitions. [2021-06-06 00:24:30,328 INFO L78 Accepts]: Start accepts. Automaton has 195688 states and 566340 transitions. Word has length 43 [2021-06-06 00:24:30,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:30,328 INFO L482 AbstractCegarLoop]: Abstraction has 195688 states and 566340 transitions. [2021-06-06 00:24:30,328 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) [2021-06-06 00:24:30,328 INFO L276 IsEmpty]: Start isEmpty. Operand 195688 states and 566340 transitions. [2021-06-06 00:24:30,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:24:30,591 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:30,591 INFO L554 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] [2021-06-06 00:24:30,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-06-06 00:24:30,792 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:30,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:30,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1492417018, now seen corresponding path program 196 times [2021-06-06 00:24:30,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:30,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640067797] [2021-06-06 00:24:30,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-06 00:24:30,846 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:30,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640067797] [2021-06-06 00:24:30,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640067797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:30,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583093485] [2021-06-06 00:24:30,846 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 [2021-06-06 00:24:30,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:24:30,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:30,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:24:30,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:30,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583093485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:30,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:30,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-06 00:24:30,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508595967] [2021-06-06 00:24:30,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-06 00:24:30,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:30,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-06 00:24:30,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-06-06 00:24:30,981 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) [2021-06-06 00:24:32,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:32,858 INFO L93 Difference]: Finished difference Result 229009 states and 659218 transitions. [2021-06-06 00:24:32,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-06 00:24:32,859 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 [2021-06-06 00:24:32,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:33,325 INFO L225 Difference]: With dead ends: 229009 [2021-06-06 00:24:33,325 INFO L226 Difference]: Without dead ends: 228911 [2021-06-06 00:24:33,325 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 401.4ms TimeCoverageRelationStatistics Valid=806, Invalid=2056, Unknown=0, NotChecked=0, Total=2862 [2021-06-06 00:24:33,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228911 states. [2021-06-06 00:24:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228911 to 202580. [2021-06-06 00:24:38,001 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) [2021-06-06 00:24:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202580 states to 202580 states and 586024 transitions. [2021-06-06 00:24:38,732 INFO L78 Accepts]: Start accepts. Automaton has 202580 states and 586024 transitions. Word has length 43 [2021-06-06 00:24:38,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:38,732 INFO L482 AbstractCegarLoop]: Abstraction has 202580 states and 586024 transitions. [2021-06-06 00:24:38,732 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) [2021-06-06 00:24:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 202580 states and 586024 transitions. [2021-06-06 00:24:39,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-06 00:24:39,918 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:39,918 INFO L554 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] [2021-06-06 00:24:40,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:40,141 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:40,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:40,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1612051392, now seen corresponding path program 197 times [2021-06-06 00:24:40,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:40,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002320708] [2021-06-06 00:24:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:40,216 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:40,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:40,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002320708] [2021-06-06 00:24:40,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002320708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:40,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748525782] [2021-06-06 00:24:40,217 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 [2021-06-06 00:24:40,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:24:40,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:40,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:24:40,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:40,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748525782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:40,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:40,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-06 00:24:40,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854981424] [2021-06-06 00:24:40,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:24:40,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:40,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:24:40,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:24:40,404 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) [2021-06-06 00:24:41,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:41,628 INFO L93 Difference]: Finished difference Result 232294 states and 668787 transitions. [2021-06-06 00:24:41,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-06 00:24:41,629 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 [2021-06-06 00:24:41,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:42,727 INFO L225 Difference]: With dead ends: 232294 [2021-06-06 00:24:42,727 INFO L226 Difference]: Without dead ends: 232154 [2021-06-06 00:24:42,727 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 409.7ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-06-06 00:24:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232154 states. [2021-06-06 00:24:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232154 to 206255. [2021-06-06 00:24:46,629 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) [2021-06-06 00:24:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206255 states to 206255 states and 596487 transitions. [2021-06-06 00:24:47,859 INFO L78 Accepts]: Start accepts. Automaton has 206255 states and 596487 transitions. Word has length 43 [2021-06-06 00:24:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:47,859 INFO L482 AbstractCegarLoop]: Abstraction has 206255 states and 596487 transitions. [2021-06-06 00:24:47,859 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) [2021-06-06 00:24:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 206255 states and 596487 transitions. [2021-06-06 00:24:48,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:24:48,161 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:48,161 INFO L554 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] [2021-06-06 00:24:48,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:48,362 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:48,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:48,362 INFO L82 PathProgramCache]: Analyzing trace with hash 993831136, now seen corresponding path program 198 times [2021-06-06 00:24:48,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:48,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612986318] [2021-06-06 00:24:48,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:48,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:48,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612986318] [2021-06-06 00:24:48,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612986318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:48,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511306276] [2021-06-06 00:24:48,544 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 [2021-06-06 00:24:48,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:24:48,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:24:48,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:24:48,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:48,801 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:48,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511306276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:48,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:48,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-06-06 00:24:48,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435725488] [2021-06-06 00:24:48,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:24:48,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:48,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:24:48,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:24:48,802 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) [2021-06-06 00:24:50,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:50,752 INFO L93 Difference]: Finished difference Result 283800 states and 818276 transitions. [2021-06-06 00:24:50,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:24:50,752 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 [2021-06-06 00:24:50,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:24:51,334 INFO L225 Difference]: With dead ends: 283800 [2021-06-06 00:24:51,334 INFO L226 Difference]: Without dead ends: 283762 [2021-06-06 00:24:51,335 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 449.2ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:24:51,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283762 states. [2021-06-06 00:24:55,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283762 to 206283. [2021-06-06 00:24:55,290 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) [2021-06-06 00:24:56,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206283 states to 206283 states and 596547 transitions. [2021-06-06 00:24:56,575 INFO L78 Accepts]: Start accepts. Automaton has 206283 states and 596547 transitions. Word has length 46 [2021-06-06 00:24:56,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:24:56,575 INFO L482 AbstractCegarLoop]: Abstraction has 206283 states and 596547 transitions. [2021-06-06 00:24:56,575 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) [2021-06-06 00:24:56,575 INFO L276 IsEmpty]: Start isEmpty. Operand 206283 states and 596547 transitions. [2021-06-06 00:24:56,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:24:56,839 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:24:56,839 INFO L554 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] [2021-06-06 00:24:57,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:24:57,039 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:24:57,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:24:57,039 INFO L82 PathProgramCache]: Analyzing trace with hash -290942774, now seen corresponding path program 199 times [2021-06-06 00:24:57,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:24:57,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870374092] [2021-06-06 00:24:57,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:24:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:57,177 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:57,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:24:57,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870374092] [2021-06-06 00:24:57,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870374092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:57,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135953048] [2021-06-06 00:24:57,178 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 [2021-06-06 00:24:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:24:57,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:24:57,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:24:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:24:57,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135953048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:24:57,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:24:57,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-06 00:24:57,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841357194] [2021-06-06 00:24:57,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:24:57,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:24:57,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:24:57,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:24:57,389 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) [2021-06-06 00:24:59,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:24:59,552 INFO L93 Difference]: Finished difference Result 306545 states and 884487 transitions. [2021-06-06 00:24:59,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:24:59,552 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 [2021-06-06 00:24:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:00,213 INFO L225 Difference]: With dead ends: 306545 [2021-06-06 00:25:00,214 INFO L226 Difference]: Without dead ends: 306463 [2021-06-06 00:25:00,214 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 383.3ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:25:00,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306463 states. [2021-06-06 00:25:04,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306463 to 226606. [2021-06-06 00:25:05,187 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) [2021-06-06 00:25:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226606 states to 226606 states and 655956 transitions. [2021-06-06 00:25:05,838 INFO L78 Accepts]: Start accepts. Automaton has 226606 states and 655956 transitions. Word has length 46 [2021-06-06 00:25:05,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:05,838 INFO L482 AbstractCegarLoop]: Abstraction has 226606 states and 655956 transitions. [2021-06-06 00:25:05,838 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) [2021-06-06 00:25:05,838 INFO L276 IsEmpty]: Start isEmpty. Operand 226606 states and 655956 transitions. [2021-06-06 00:25:06,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:25:06,934 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:06,934 INFO L554 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] [2021-06-06 00:25:07,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:07,149 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:07,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:07,149 INFO L82 PathProgramCache]: Analyzing trace with hash 305163142, now seen corresponding path program 200 times [2021-06-06 00:25:07,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:07,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10376910] [2021-06-06 00:25:07,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:07,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:07,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10376910] [2021-06-06 00:25:07,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10376910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:07,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294212364] [2021-06-06 00:25:07,289 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 [2021-06-06 00:25:07,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:25:07,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:07,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:25:07,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:07,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294212364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:07,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:07,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-06 00:25:07,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629481519] [2021-06-06 00:25:07,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:25:07,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:07,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:25:07,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:25:07,501 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) [2021-06-06 00:25:09,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:09,650 INFO L93 Difference]: Finished difference Result 306514 states and 884419 transitions. [2021-06-06 00:25:09,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:25:09,650 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 [2021-06-06 00:25:09,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:10,400 INFO L225 Difference]: With dead ends: 306514 [2021-06-06 00:25:10,400 INFO L226 Difference]: Without dead ends: 306402 [2021-06-06 00:25:10,401 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 384.2ms TimeCoverageRelationStatistics Valid=136, Invalid=1124, Unknown=0, NotChecked=0, Total=1260 [2021-06-06 00:25:10,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306402 states. [2021-06-06 00:25:14,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306402 to 223282. [2021-06-06 00:25:14,806 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) [2021-06-06 00:25:16,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223282 states to 223282 states and 645850 transitions. [2021-06-06 00:25:16,098 INFO L78 Accepts]: Start accepts. Automaton has 223282 states and 645850 transitions. Word has length 46 [2021-06-06 00:25:16,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:16,098 INFO L482 AbstractCegarLoop]: Abstraction has 223282 states and 645850 transitions. [2021-06-06 00:25:16,098 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) [2021-06-06 00:25:16,098 INFO L276 IsEmpty]: Start isEmpty. Operand 223282 states and 645850 transitions. [2021-06-06 00:25:16,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:25:16,432 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:16,432 INFO L554 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] [2021-06-06 00:25:16,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:25:16,632 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:16,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:16,633 INFO L82 PathProgramCache]: Analyzing trace with hash -752360386, now seen corresponding path program 201 times [2021-06-06 00:25:16,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:16,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257708891] [2021-06-06 00:25:16,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:16,767 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:16,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257708891] [2021-06-06 00:25:16,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257708891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:16,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019881408] [2021-06-06 00:25:16,767 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 [2021-06-06 00:25:16,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-06 00:25:16,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:16,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:25:16,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:16,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019881408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:16,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:16,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-06-06 00:25:16,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822396795] [2021-06-06 00:25:16,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:25:16,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:16,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:25:16,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:25:16,997 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) [2021-06-06 00:25:19,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:19,187 INFO L93 Difference]: Finished difference Result 306804 states and 884969 transitions. [2021-06-06 00:25:19,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:25:19,187 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 [2021-06-06 00:25:19,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:19,845 INFO L225 Difference]: With dead ends: 306804 [2021-06-06 00:25:19,846 INFO L226 Difference]: Without dead ends: 306680 [2021-06-06 00:25:19,846 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 420.0ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:25:20,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306680 states. [2021-06-06 00:25:24,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306680 to 225174. [2021-06-06 00:25:24,583 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) [2021-06-06 00:25:26,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225174 states to 225174 states and 651440 transitions. [2021-06-06 00:25:26,257 INFO L78 Accepts]: Start accepts. Automaton has 225174 states and 651440 transitions. Word has length 46 [2021-06-06 00:25:26,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:26,257 INFO L482 AbstractCegarLoop]: Abstraction has 225174 states and 651440 transitions. [2021-06-06 00:25:26,258 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) [2021-06-06 00:25:26,258 INFO L276 IsEmpty]: Start isEmpty. Operand 225174 states and 651440 transitions. [2021-06-06 00:25:26,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:25:26,808 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:26,808 INFO L554 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] [2021-06-06 00:25:27,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-06 00:25:27,031 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:27,032 INFO L82 PathProgramCache]: Analyzing trace with hash 426214436, now seen corresponding path program 202 times [2021-06-06 00:25:27,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:27,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509385583] [2021-06-06 00:25:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:27,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:27,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509385583] [2021-06-06 00:25:27,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509385583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:27,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599964297] [2021-06-06 00:25:27,215 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 [2021-06-06 00:25:27,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:25:27,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:27,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:25:27,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:27,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599964297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:27,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:27,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-06 00:25:27,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258142020] [2021-06-06 00:25:27,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:25:27,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:27,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:25:27,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:25:27,497 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) [2021-06-06 00:25:30,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:30,020 INFO L93 Difference]: Finished difference Result 307154 states and 885951 transitions. [2021-06-06 00:25:30,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:25:30,020 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 [2021-06-06 00:25:30,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:31,167 INFO L225 Difference]: With dead ends: 307154 [2021-06-06 00:25:31,168 INFO L226 Difference]: Without dead ends: 307024 [2021-06-06 00:25:31,168 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 379.9ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:25:31,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307024 states. [2021-06-06 00:25:35,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307024 to 226798. [2021-06-06 00:25:36,072 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) [2021-06-06 00:25:36,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226798 states to 226798 states and 656268 transitions. [2021-06-06 00:25:36,699 INFO L78 Accepts]: Start accepts. Automaton has 226798 states and 656268 transitions. Word has length 46 [2021-06-06 00:25:36,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:36,699 INFO L482 AbstractCegarLoop]: Abstraction has 226798 states and 656268 transitions. [2021-06-06 00:25:36,699 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) [2021-06-06 00:25:36,699 INFO L276 IsEmpty]: Start isEmpty. Operand 226798 states and 656268 transitions. [2021-06-06 00:25:37,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:25:37,056 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:37,056 INFO L554 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] [2021-06-06 00:25:37,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-06 00:25:37,256 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:37,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:37,256 INFO L82 PathProgramCache]: Analyzing trace with hash -8908162, now seen corresponding path program 203 times [2021-06-06 00:25:37,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:37,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744802308] [2021-06-06 00:25:37,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:37,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:37,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744802308] [2021-06-06 00:25:37,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744802308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:37,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707512714] [2021-06-06 00:25:37,409 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 [2021-06-06 00:25:37,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:25:37,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:37,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:25:37,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:37,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707512714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:37,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:37,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-06 00:25:37,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099542490] [2021-06-06 00:25:37,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:25:37,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:37,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:25:37,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:25:37,620 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) [2021-06-06 00:25:39,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:39,618 INFO L93 Difference]: Finished difference Result 307138 states and 885982 transitions. [2021-06-06 00:25:39,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-06 00:25:39,618 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 [2021-06-06 00:25:39,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:40,821 INFO L225 Difference]: With dead ends: 307138 [2021-06-06 00:25:40,821 INFO L226 Difference]: Without dead ends: 307062 [2021-06-06 00:25:40,822 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 282.1ms TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-06-06 00:25:41,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307062 states. [2021-06-06 00:25:44,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307062 to 227686. [2021-06-06 00:25:44,975 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) [2021-06-06 00:25:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227686 states to 227686 states and 658844 transitions. [2021-06-06 00:25:46,356 INFO L78 Accepts]: Start accepts. Automaton has 227686 states and 658844 transitions. Word has length 46 [2021-06-06 00:25:46,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:46,356 INFO L482 AbstractCegarLoop]: Abstraction has 227686 states and 658844 transitions. [2021-06-06 00:25:46,356 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) [2021-06-06 00:25:46,356 INFO L276 IsEmpty]: Start isEmpty. Operand 227686 states and 658844 transitions. [2021-06-06 00:25:46,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:25:46,758 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:46,758 INFO L554 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] [2021-06-06 00:25:46,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-06 00:25:46,958 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:46,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:46,959 INFO L82 PathProgramCache]: Analyzing trace with hash -534925852, now seen corresponding path program 204 times [2021-06-06 00:25:46,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:46,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956816791] [2021-06-06 00:25:46,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:47,115 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:47,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:47,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956816791] [2021-06-06 00:25:47,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956816791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:47,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536282732] [2021-06-06 00:25:47,116 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 [2021-06-06 00:25:47,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:25:47,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:25:47,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:25:47,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:47,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536282732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:47,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:47,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-06-06 00:25:47,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946493627] [2021-06-06 00:25:47,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:25:47,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:47,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:25:47,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:25:47,349 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) [2021-06-06 00:25:49,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:49,385 INFO L93 Difference]: Finished difference Result 307114 states and 885933 transitions. [2021-06-06 00:25:49,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-06 00:25:49,386 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 [2021-06-06 00:25:49,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:50,032 INFO L225 Difference]: With dead ends: 307114 [2021-06-06 00:25:50,032 INFO L226 Difference]: Without dead ends: 307076 [2021-06-06 00:25:50,032 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 441.0ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:25:50,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307076 states. [2021-06-06 00:25:54,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307076 to 227708. [2021-06-06 00:25:54,862 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) [2021-06-06 00:25:55,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227708 states to 227708 states and 658909 transitions. [2021-06-06 00:25:55,505 INFO L78 Accepts]: Start accepts. Automaton has 227708 states and 658909 transitions. Word has length 46 [2021-06-06 00:25:55,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:25:55,506 INFO L482 AbstractCegarLoop]: Abstraction has 227708 states and 658909 transitions. [2021-06-06 00:25:55,506 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) [2021-06-06 00:25:55,506 INFO L276 IsEmpty]: Start isEmpty. Operand 227708 states and 658909 transitions. [2021-06-06 00:25:55,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:25:55,867 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:25:55,867 INFO L554 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] [2021-06-06 00:25:56,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-06-06 00:25:56,068 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:25:56,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:25:56,068 INFO L82 PathProgramCache]: Analyzing trace with hash 250764184, now seen corresponding path program 205 times [2021-06-06 00:25:56,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:25:56,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364160122] [2021-06-06 00:25:56,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:25:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:56,968 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:56,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:25:56,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364160122] [2021-06-06 00:25:56,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364160122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:56,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371568660] [2021-06-06 00:25:56,969 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 [2021-06-06 00:25:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:25:57,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:25:57,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:25:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:25:57,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371568660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:25:57,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:25:57,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 23 [2021-06-06 00:25:57,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080099449] [2021-06-06 00:25:57,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:25:57,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:25:57,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:25:57,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:25:57,284 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) [2021-06-06 00:25:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:25:59,190 INFO L93 Difference]: Finished difference Result 276784 states and 800858 transitions. [2021-06-06 00:25:59,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-06 00:25:59,205 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 [2021-06-06 00:25:59,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:25:59,787 INFO L225 Difference]: With dead ends: 276784 [2021-06-06 00:25:59,788 INFO L226 Difference]: Without dead ends: 276678 [2021-06-06 00:25:59,788 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1145.4ms TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:26:00,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276678 states. [2021-06-06 00:26:04,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276678 to 258936. [2021-06-06 00:26:04,698 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) [2021-06-06 00:26:05,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258936 states to 258936 states and 751133 transitions. [2021-06-06 00:26:05,414 INFO L78 Accepts]: Start accepts. Automaton has 258936 states and 751133 transitions. Word has length 46 [2021-06-06 00:26:05,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:05,415 INFO L482 AbstractCegarLoop]: Abstraction has 258936 states and 751133 transitions. [2021-06-06 00:26:05,415 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) [2021-06-06 00:26:05,415 INFO L276 IsEmpty]: Start isEmpty. Operand 258936 states and 751133 transitions. [2021-06-06 00:26:05,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:26:05,819 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:05,819 INFO L554 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] [2021-06-06 00:26:06,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-06-06 00:26:06,020 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:06,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:06,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1527268248, now seen corresponding path program 206 times [2021-06-06 00:26:06,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:06,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352877198] [2021-06-06 00:26:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:06,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:06,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:06,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352877198] [2021-06-06 00:26:06,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352877198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:06,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498629942] [2021-06-06 00:26:06,149 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 [2021-06-06 00:26:06,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:26:06,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:06,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:26:06,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:07,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498629942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:07,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:07,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-06 00:26:07,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226199498] [2021-06-06 00:26:07,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:26:07,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:07,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:26:07,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:26:07,171 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) [2021-06-06 00:26:08,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:08,542 INFO L93 Difference]: Finished difference Result 279301 states and 807945 transitions. [2021-06-06 00:26:08,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:26:08,542 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 [2021-06-06 00:26:08,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:09,651 INFO L225 Difference]: With dead ends: 279301 [2021-06-06 00:26:09,652 INFO L226 Difference]: Without dead ends: 279177 [2021-06-06 00:26:09,652 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1150.6ms TimeCoverageRelationStatistics Valid=127, Invalid=995, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:26:09,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279177 states. [2021-06-06 00:26:14,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279177 to 255508. [2021-06-06 00:26:14,580 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) [2021-06-06 00:26:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255508 states to 255508 states and 740591 transitions. [2021-06-06 00:26:16,059 INFO L78 Accepts]: Start accepts. Automaton has 255508 states and 740591 transitions. Word has length 46 [2021-06-06 00:26:16,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:16,059 INFO L482 AbstractCegarLoop]: Abstraction has 255508 states and 740591 transitions. [2021-06-06 00:26:16,060 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) [2021-06-06 00:26:16,060 INFO L276 IsEmpty]: Start isEmpty. Operand 255508 states and 740591 transitions. [2021-06-06 00:26:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:26:16,421 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:16,421 INFO L554 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] [2021-06-06 00:26:16,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:16,622 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:16,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:16,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1217093792, now seen corresponding path program 207 times [2021-06-06 00:26:16,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:16,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516930516] [2021-06-06 00:26:16,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:16,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:16,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516930516] [2021-06-06 00:26:16,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516930516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:16,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143985249] [2021-06-06 00:26:16,747 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 [2021-06-06 00:26:16,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:26:16,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:16,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:26:16,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:16,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143985249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:16,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:16,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-06-06 00:26:16,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805386956] [2021-06-06 00:26:16,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:26:16,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:16,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:26:16,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:26:16,990 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) [2021-06-06 00:26:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:19,120 INFO L93 Difference]: Finished difference Result 274555 states and 793544 transitions. [2021-06-06 00:26:19,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:26:19,121 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 [2021-06-06 00:26:19,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:19,679 INFO L225 Difference]: With dead ends: 274555 [2021-06-06 00:26:19,679 INFO L226 Difference]: Without dead ends: 274424 [2021-06-06 00:26:19,680 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 418.9ms TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:26:20,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274424 states. [2021-06-06 00:26:24,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274424 to 253574. [2021-06-06 00:26:24,435 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) [2021-06-06 00:26:25,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253574 states to 253574 states and 734770 transitions. [2021-06-06 00:26:25,885 INFO L78 Accepts]: Start accepts. Automaton has 253574 states and 734770 transitions. Word has length 46 [2021-06-06 00:26:25,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:25,885 INFO L482 AbstractCegarLoop]: Abstraction has 253574 states and 734770 transitions. [2021-06-06 00:26:25,885 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) [2021-06-06 00:26:25,885 INFO L276 IsEmpty]: Start isEmpty. Operand 253574 states and 734770 transitions. [2021-06-06 00:26:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:26:26,274 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:26,274 INFO L554 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] [2021-06-06 00:26:26,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-06-06 00:26:26,474 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:26,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:26,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1861204456, now seen corresponding path program 208 times [2021-06-06 00:26:26,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:26,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460720994] [2021-06-06 00:26:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:26,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:26,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460720994] [2021-06-06 00:26:26,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460720994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:26,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103907072] [2021-06-06 00:26:26,625 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 [2021-06-06 00:26:26,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:26:26,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:26,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:26:26,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:26,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103907072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:26,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:26,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-06-06 00:26:26,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063350978] [2021-06-06 00:26:26,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:26:26,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:26,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:26:26,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:26:26,850 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) [2021-06-06 00:26:28,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:28,657 INFO L93 Difference]: Finished difference Result 271446 states and 784470 transitions. [2021-06-06 00:26:28,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:26:28,658 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 [2021-06-06 00:26:28,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:29,236 INFO L225 Difference]: With dead ends: 271446 [2021-06-06 00:26:29,237 INFO L226 Difference]: Without dead ends: 271292 [2021-06-06 00:26:29,237 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:26:29,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271292 states. [2021-06-06 00:26:33,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271292 to 252854. [2021-06-06 00:26:34,101 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) [2021-06-06 00:26:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252854 states to 252854 states and 732660 transitions. [2021-06-06 00:26:35,544 INFO L78 Accepts]: Start accepts. Automaton has 252854 states and 732660 transitions. Word has length 46 [2021-06-06 00:26:35,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:35,544 INFO L482 AbstractCegarLoop]: Abstraction has 252854 states and 732660 transitions. [2021-06-06 00:26:35,544 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) [2021-06-06 00:26:35,544 INFO L276 IsEmpty]: Start isEmpty. Operand 252854 states and 732660 transitions. [2021-06-06 00:26:35,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:26:35,924 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:35,924 INFO L554 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] [2021-06-06 00:26:36,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:36,124 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:36,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:36,125 INFO L82 PathProgramCache]: Analyzing trace with hash -648117152, now seen corresponding path program 209 times [2021-06-06 00:26:36,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:36,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901983023] [2021-06-06 00:26:36,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:36,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:36,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:36,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901983023] [2021-06-06 00:26:36,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901983023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:36,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549043601] [2021-06-06 00:26:36,267 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 [2021-06-06 00:26:36,293 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:26:36,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:36,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:26:36,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:36,511 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:36,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549043601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:36,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:36,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-06-06 00:26:36,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308144055] [2021-06-06 00:26:36,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:26:36,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:36,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:26:36,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:26:36,512 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) [2021-06-06 00:26:38,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:38,466 INFO L93 Difference]: Finished difference Result 270419 states and 781520 transitions. [2021-06-06 00:26:38,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:26:38,466 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 [2021-06-06 00:26:38,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:39,044 INFO L225 Difference]: With dead ends: 270419 [2021-06-06 00:26:39,044 INFO L226 Difference]: Without dead ends: 270343 [2021-06-06 00:26:39,044 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 423.8ms TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:26:39,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270343 states. [2021-06-06 00:26:43,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270343 to 252092. [2021-06-06 00:26:43,760 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) [2021-06-06 00:26:45,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252092 states to 252092 states and 730437 transitions. [2021-06-06 00:26:45,155 INFO L78 Accepts]: Start accepts. Automaton has 252092 states and 730437 transitions. Word has length 46 [2021-06-06 00:26:45,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:45,155 INFO L482 AbstractCegarLoop]: Abstraction has 252092 states and 730437 transitions. [2021-06-06 00:26:45,155 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) [2021-06-06 00:26:45,155 INFO L276 IsEmpty]: Start isEmpty. Operand 252092 states and 730437 transitions. [2021-06-06 00:26:45,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:26:45,622 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:45,622 INFO L554 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] [2021-06-06 00:26:45,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:45,822 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:45,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:45,823 INFO L82 PathProgramCache]: Analyzing trace with hash 580927768, now seen corresponding path program 210 times [2021-06-06 00:26:45,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:45,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967371204] [2021-06-06 00:26:45,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:45,990 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:45,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:45,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967371204] [2021-06-06 00:26:45,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967371204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:45,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917868763] [2021-06-06 00:26:45,990 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:46,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:26:46,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:26:46,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:26:46,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:46,241 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:46,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917868763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:46,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:46,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2021-06-06 00:26:46,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873889622] [2021-06-06 00:26:46,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:26:46,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:46,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:26:46,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:26:46,242 INFO L87 Difference]: Start difference. First operand 252092 states and 730437 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2021-06-06 00:26:48,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:48,189 INFO L93 Difference]: Finished difference Result 270325 states and 781258 transitions. [2021-06-06 00:26:48,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-06 00:26:48,189 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 [2021-06-06 00:26:48,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:48,777 INFO L225 Difference]: With dead ends: 270325 [2021-06-06 00:26:48,778 INFO L226 Difference]: Without dead ends: 270249 [2021-06-06 00:26:48,778 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 465.0ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-06 00:26:49,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270249 states. [2021-06-06 00:26:53,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270249 to 252843. [2021-06-06 00:26:53,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252843 states, 252842 states have (on average 2.8974379256610847) internal successors, (732594), 252842 states have internal predecessors, (732594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:26:54,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252843 states to 252843 states and 732594 transitions. [2021-06-06 00:26:54,176 INFO L78 Accepts]: Start accepts. Automaton has 252843 states and 732594 transitions. Word has length 46 [2021-06-06 00:26:54,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:26:54,176 INFO L482 AbstractCegarLoop]: Abstraction has 252843 states and 732594 transitions. [2021-06-06 00:26:54,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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) [2021-06-06 00:26:54,176 INFO L276 IsEmpty]: Start isEmpty. Operand 252843 states and 732594 transitions. [2021-06-06 00:26:55,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:26:55,472 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:26:55,472 INFO L554 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] [2021-06-06 00:26:55,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:55,672 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:26:55,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:26:55,672 INFO L82 PathProgramCache]: Analyzing trace with hash 372500588, now seen corresponding path program 211 times [2021-06-06 00:26:55,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:26:55,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444255605] [2021-06-06 00:26:55,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:26:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:55,814 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:55,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:26:55,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444255605] [2021-06-06 00:26:55,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444255605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:55,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633037148] [2021-06-06 00:26:55,814 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:26:55,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:26:55,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:26:55,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:26:56,063 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:26:56,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633037148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:26:56,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:26:56,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 24 [2021-06-06 00:26:56,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135771491] [2021-06-06 00:26:56,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:26:56,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:26:56,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:26:56,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:26:56,064 INFO L87 Difference]: Start difference. First operand 252843 states and 732594 transitions. Second operand has 25 states, 25 states have (on average 2.88) 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) [2021-06-06 00:26:58,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:26:58,039 INFO L93 Difference]: Finished difference Result 284097 states and 824904 transitions. [2021-06-06 00:26:58,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-06 00:26:58,039 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) 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 46 [2021-06-06 00:26:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:26:59,254 INFO L225 Difference]: With dead ends: 284097 [2021-06-06 00:26:59,255 INFO L226 Difference]: Without dead ends: 283975 [2021-06-06 00:26:59,255 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 381.1ms TimeCoverageRelationStatistics Valid=119, Invalid=1003, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:26:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283975 states. [2021-06-06 00:27:04,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283975 to 283015. [2021-06-06 00:27:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283015 states, 283014 states have (on average 2.9055665090772895) internal successors, (822316), 283014 states have internal predecessors, (822316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283015 states to 283015 states and 822316 transitions. [2021-06-06 00:27:06,370 INFO L78 Accepts]: Start accepts. Automaton has 283015 states and 822316 transitions. Word has length 46 [2021-06-06 00:27:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:06,370 INFO L482 AbstractCegarLoop]: Abstraction has 283015 states and 822316 transitions. [2021-06-06 00:27:06,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.88) 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) [2021-06-06 00:27:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 283015 states and 822316 transitions. [2021-06-06 00:27:06,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:27:06,880 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:06,880 INFO L554 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] [2021-06-06 00:27:07,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-06 00:27:07,081 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:07,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:07,081 INFO L82 PathProgramCache]: Analyzing trace with hash -850429848, now seen corresponding path program 212 times [2021-06-06 00:27:07,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:07,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599528538] [2021-06-06 00:27:07,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:07,205 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:07,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:07,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599528538] [2021-06-06 00:27:07,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599528538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:07,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164404516] [2021-06-06 00:27:07,205 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:07,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:27:07,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:07,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:27:07,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:07,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164404516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:07,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:07,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-06 00:27:07,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685859617] [2021-06-06 00:27:07,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:27:07,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:07,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:27:07,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:27:07,453 INFO L87 Difference]: Start difference. First operand 283015 states and 822316 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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) [2021-06-06 00:27:09,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:09,450 INFO L93 Difference]: Finished difference Result 286594 states and 831909 transitions. [2021-06-06 00:27:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-06 00:27:09,450 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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 46 [2021-06-06 00:27:09,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:10,063 INFO L225 Difference]: With dead ends: 286594 [2021-06-06 00:27:10,063 INFO L226 Difference]: Without dead ends: 286464 [2021-06-06 00:27:10,064 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 353.5ms TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2021-06-06 00:27:10,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286464 states. [2021-06-06 00:27:14,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286464 to 280445. [2021-06-06 00:27:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280445 states, 280444 states have (on average 2.9030644264095504) internal successors, (814147), 280444 states have internal predecessors, (814147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280445 states to 280445 states and 814147 transitions. [2021-06-06 00:27:16,467 INFO L78 Accepts]: Start accepts. Automaton has 280445 states and 814147 transitions. Word has length 46 [2021-06-06 00:27:16,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:16,467 INFO L482 AbstractCegarLoop]: Abstraction has 280445 states and 814147 transitions. [2021-06-06 00:27:16,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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) [2021-06-06 00:27:16,467 INFO L276 IsEmpty]: Start isEmpty. Operand 280445 states and 814147 transitions. [2021-06-06 00:27:16,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:27:16,912 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:16,912 INFO L554 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] [2021-06-06 00:27:17,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-06-06 00:27:17,113 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:17,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:17,113 INFO L82 PathProgramCache]: Analyzing trace with hash -454634690, now seen corresponding path program 213 times [2021-06-06 00:27:17,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:17,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414462039] [2021-06-06 00:27:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:17,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:17,223 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:17,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:17,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414462039] [2021-06-06 00:27:17,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414462039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:17,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908875798] [2021-06-06 00:27:17,223 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:17,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-06 00:27:17,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:17,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:27:17,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:17,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908875798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:17,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:17,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 23 [2021-06-06 00:27:17,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814836927] [2021-06-06 00:27:17,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-06 00:27:17,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:17,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-06 00:27:17,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-06 00:27:17,490 INFO L87 Difference]: Start difference. First operand 280445 states and 814147 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 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) [2021-06-06 00:27:19,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:19,612 INFO L93 Difference]: Finished difference Result 282908 states and 820344 transitions. [2021-06-06 00:27:19,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-06 00:27:19,613 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 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 46 [2021-06-06 00:27:19,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:20,191 INFO L225 Difference]: With dead ends: 282908 [2021-06-06 00:27:20,191 INFO L226 Difference]: Without dead ends: 282777 [2021-06-06 00:27:20,192 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 405.1ms TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2021-06-06 00:27:21,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282777 states. [2021-06-06 00:27:25,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282777 to 277559. [2021-06-06 00:27:25,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277559 states, 277558 states have (on average 2.903148170832763) internal successors, (805792), 277558 states have internal predecessors, (805792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:26,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277559 states to 277559 states and 805792 transitions. [2021-06-06 00:27:26,780 INFO L78 Accepts]: Start accepts. Automaton has 277559 states and 805792 transitions. Word has length 46 [2021-06-06 00:27:26,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:26,780 INFO L482 AbstractCegarLoop]: Abstraction has 277559 states and 805792 transitions. [2021-06-06 00:27:26,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 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) [2021-06-06 00:27:26,780 INFO L276 IsEmpty]: Start isEmpty. Operand 277559 states and 805792 transitions. [2021-06-06 00:27:27,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:27:27,213 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:27,213 INFO L554 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] [2021-06-06 00:27:27,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:27,414 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:27,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:27,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1743048966, now seen corresponding path program 214 times [2021-06-06 00:27:27,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:27,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939539847] [2021-06-06 00:27:27,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:27,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:27,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939539847] [2021-06-06 00:27:27,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939539847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:27,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847371484] [2021-06-06 00:27:27,533 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:28,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:27:28,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:28,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-06 00:27:28,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:28,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847371484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:28,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:28,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 22 [2021-06-06 00:27:28,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975372520] [2021-06-06 00:27:28,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-06 00:27:28,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:28,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-06 00:27:28,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:27:28,628 INFO L87 Difference]: Start difference. First operand 277559 states and 805792 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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) [2021-06-06 00:27:29,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:29,863 INFO L93 Difference]: Finished difference Result 278792 states and 808737 transitions. [2021-06-06 00:27:29,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:27:29,863 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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 46 [2021-06-06 00:27:29,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:30,903 INFO L225 Difference]: With dead ends: 278792 [2021-06-06 00:27:30,904 INFO L226 Difference]: Without dead ends: 278662 [2021-06-06 00:27:30,904 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 321.4ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-06 00:27:31,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278662 states. [2021-06-06 00:27:35,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278662 to 275335. [2021-06-06 00:27:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275335 states, 275334 states have (on average 2.9027944242265757) internal successors, (799238), 275334 states have internal predecessors, (799238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:27:36,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275335 states to 275335 states and 799238 transitions. [2021-06-06 00:27:36,487 INFO L78 Accepts]: Start accepts. Automaton has 275335 states and 799238 transitions. Word has length 46 [2021-06-06 00:27:36,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:27:36,487 INFO L482 AbstractCegarLoop]: Abstraction has 275335 states and 799238 transitions. [2021-06-06 00:27:36,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 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) [2021-06-06 00:27:36,487 INFO L276 IsEmpty]: Start isEmpty. Operand 275335 states and 799238 transitions. [2021-06-06 00:27:37,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-06 00:27:37,722 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:27:37,722 INFO L554 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] [2021-06-06 00:27:37,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-06 00:27:37,922 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:27:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:27:37,923 INFO L82 PathProgramCache]: Analyzing trace with hash 455384638, now seen corresponding path program 215 times [2021-06-06 00:27:37,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:27:37,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194492960] [2021-06-06 00:27:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:27:37,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:27:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:38,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:27:38,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194492960] [2021-06-06 00:27:38,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194492960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:38,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588659416] [2021-06-06 00:27:38,060 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:38,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:27:38,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:27:38,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-06 00:27:38,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:27:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:27:38,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588659416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:27:38,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:27:38,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 24 [2021-06-06 00:27:38,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786228037] [2021-06-06 00:27:38,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-06 00:27:38,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:27:38,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-06 00:27:38,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=536, Unknown=0, NotChecked=0, Total=600 [2021-06-06 00:27:38,326 INFO L87 Difference]: Start difference. First operand 275335 states and 799238 transitions. Second operand has 25 states, 25 states have (on average 2.88) 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) [2021-06-06 00:27:40,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:27:40,353 INFO L93 Difference]: Finished difference Result 278625 states and 808471 transitions. [2021-06-06 00:27:40,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-06 00:27:40,354 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) 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 46 [2021-06-06 00:27:40,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:27:40,948 INFO L225 Difference]: With dead ends: 278625 [2021-06-06 00:27:40,948 INFO L226 Difference]: Without dead ends: 278549 [2021-06-06 00:27:40,948 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 440.6ms TimeCoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 Received shutdown request... [2021-06-06 00:27:41,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278549 states. [2021-06-06 00:27:41,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:27:41,411 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-06 00:27:41,413 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-06 00:27:41,414 WARN L196 ceAbstractionStarter]: Timeout [2021-06-06 00:27:41,415 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.06 12:27:41 BasicIcfg [2021-06-06 00:27:41,415 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-06 00:27:41,415 INFO L168 Benchmark]: Toolchain (without parser) took 686415.46 ms. Allocated memory was 350.2 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 328.9 MB in the beginning and 8.8 GB in the end (delta: -8.5 GB). Peak memory consumption was 7.1 GB. Max. memory is 16.0 GB. [2021-06-06 00:27:41,415 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 350.2 MB. Free memory is still 330.0 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:27:41,415 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.54 ms. Allocated memory is still 350.2 MB. Free memory was 328.9 MB in the beginning and 327.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:27:41,415 INFO L168 Benchmark]: Boogie Preprocessor took 18.73 ms. Allocated memory is still 350.2 MB. Free memory was 327.3 MB in the beginning and 326.3 MB in the end (delta: 990.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:27:41,415 INFO L168 Benchmark]: RCFGBuilder took 299.43 ms. Allocated memory is still 350.2 MB. Free memory was 326.3 MB in the beginning and 313.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-06 00:27:41,415 INFO L168 Benchmark]: TraceAbstraction took 686064.82 ms. Allocated memory was 350.2 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 313.2 MB in the beginning and 8.8 GB in the end (delta: -8.5 GB). Peak memory consumption was 7.1 GB. Max. memory is 16.0 GB. [2021-06-06 00:27:41,416 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 0.12 ms. Allocated memory is still 350.2 MB. Free memory is still 330.0 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.54 ms. Allocated memory is still 350.2 MB. Free memory was 328.9 MB in the beginning and 327.3 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 18.73 ms. Allocated memory is still 350.2 MB. Free memory was 327.3 MB in the beginning and 326.3 MB in the end (delta: 990.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 299.43 ms. Allocated memory is still 350.2 MB. Free memory was 326.3 MB in the beginning and 313.7 MB in the end (delta: 12.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 686064.82 ms. Allocated memory was 350.2 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 313.2 MB in the beginning and 8.8 GB in the end (delta: -8.5 GB). Peak memory consumption was 7.1 GB. Max. memory is 16.0 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 executing MinimizeSevpa. - 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: 685946.5ms, OverallIterations: 233, TraceHistogramMax: 4, EmptinessCheckTime: 29082.0ms, AutomataDifference: 200614.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 55.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21064 SDtfs, 43796 SDslu, 188020 SDs, 0 SdLazy, 84917 SolverSat, 4662 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 33812.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15603 GetRequests, 8919 SyntacticMatches, 158 SemanticMatches, 6526 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61560 ImplicationChecksByTransitivity, 64443.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=283015occurred in iteration=229, InterpolantAutomatonStates: 6099, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 350939.9ms AutomataMinimizationTime, 233 MinimizatonAttempts, 2505205 StatesRemovedByMinimization, 232 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 933.6ms SsaConstructionTime, 3236.7ms SatisfiabilityAnalysisTime, 51457.7ms InterpolantComputationTime, 16952 NumberOfCodeBlocks, 16949 NumberOfCodeBlocksAsserted, 856 NumberOfCheckSat, 16500 ConstructedInterpolants, 0 QuantifiedInterpolants, 120831 SizeOfPredicates, 905 NumberOfNonLiveVariables, 17641 ConjunctsInSsa, 3704 ConjunctsInUnsatCore, 452 InterpolantComputations, 14 PerfectInterpolantSequences, 2163/9326 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