/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/test/context1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2abb09bbbae98a04ae2fcc735832bfdba44f6fbc-2abb09b [2021-06-06 00:36:00,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-06 00:36:00,908 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-06 00:36:00,928 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-06 00:36:00,953 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 00:36:00,968 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-06 00:36:00,968 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-06 00:36:00,968 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-06 00:36:00,968 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-06 00:36:00,969 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-06 00:36:00,969 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-06 00:36:00,969 INFO L138 SettingsManager]: * Use SBE=true [2021-06-06 00:36:00,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-06 00:36:00,969 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-06 00:36:00,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-06 00:36:00,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-06 00:36:00,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-06 00:36:00,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-06 00:36:00,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-06 00:36:00,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-06 00:36:00,970 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-06 00:36:00,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-06 00:36:00,970 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-06 00:36:00,970 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-06 00:36:00,970 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-06 00:36:00,970 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-06 00:36:00,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-06 00:36:00,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-06 00:36:00,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-06 00:36:00,971 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-06 00:36:00,971 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-06 00:36:00,971 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-06 00:36:00,971 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-06 00:36:00,971 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-06 00:36:00,971 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-06 00:36:00,971 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-06 00:36:00,971 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-06 00:36:01,196 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-06 00:36:01,219 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-06 00:36:01,221 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-06 00:36:01,222 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-06 00:36:01,223 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-06 00:36:01,223 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/context1.wvr.bpl [2021-06-06 00:36:01,503 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/context1.wvr.bpl' [2021-06-06 00:36:01,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-06 00:36:01,563 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-06 00:36:01,564 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-06 00:36:01,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-06 00:36:01,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-06 00:36:01,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:36:01" (1/1) ... [2021-06-06 00:36:01,577 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:36:01" (1/1) ... [2021-06-06 00:36:01,582 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-06 00:36:01,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-06 00:36:01,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-06 00:36:01,584 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-06 00:36:01,589 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:36:01" (1/1) ... [2021-06-06 00:36:01,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:36:01" (1/1) ... [2021-06-06 00:36:01,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:36:01" (1/1) ... [2021-06-06 00:36:01,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:36:01" (1/1) ... [2021-06-06 00:36:01,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:36:01" (1/1) ... [2021-06-06 00:36:01,594 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:36:01" (1/1) ... [2021-06-06 00:36:01,595 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:36:01" (1/1) ... [2021-06-06 00:36:01,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-06 00:36:01,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-06 00:36:01,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-06 00:36:01,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-06 00:36:01,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:36:01" (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 00:36:01,650 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-06 00:36:01,650 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-06 00:36:01,650 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-06 00:36:01,650 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-06 00:36:01,650 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-06 00:36:01,651 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-06 00:36:01,651 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-06 00:36:01,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-06 00:36:01,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-06 00:36:01,651 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 00:36:01,810 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-06 00:36:01,811 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-06 00:36:01,811 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-06 00:36:01,811 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-06 00:36:01,812 INFO L202 PluginConnector]: Adding new model context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:36:01 BoogieIcfgContainer [2021-06-06 00:36:01,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-06 00:36:01,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-06 00:36:01,814 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-06 00:36:01,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-06 00:36:01,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.06 12:36:01" (1/2) ... [2021-06-06 00:36:01,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b0384e8 and model type context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.06 12:36:01, skipping insertion in model container [2021-06-06 00:36:01,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.06 12:36:01" (2/2) ... [2021-06-06 00:36:01,817 INFO L111 eAbstractionObserver]: Analyzing ICFG context1.wvr.bpl [2021-06-06 00:36:01,820 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-06 00:36:01,820 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-06 00:36:01,821 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-06 00:36:01,821 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-06 00:36:01,861 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-06 00:36:01,874 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-06 00:36:01,886 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-06 00:36:01,886 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-06 00:36:01,887 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-06 00:36:01,887 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-06 00:36:01,887 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-06 00:36:01,887 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-06 00:36:01,887 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-06 00:36:01,887 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-06 00:36:01,892 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-06 00:36:01,915 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:01,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:01,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-06 00:36:01,920 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:01,921 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:01,921 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:01,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:01,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1225879624, now seen corresponding path program 1 times [2021-06-06 00:36:01,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:01,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971876671] [2021-06-06 00:36:01,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:02,045 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 00:36:02,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:02,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971876671] [2021-06-06 00:36:02,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971876671] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:36:02,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:36:02,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-06 00:36:02,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929512985] [2021-06-06 00:36:02,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-06 00:36:02,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:02,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-06 00:36:02,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:36:02,065 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:02,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:02,084 INFO L93 Difference]: Finished difference Result 20 states and 34 transitions. [2021-06-06 00:36:02,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 00:36:02,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-06 00:36:02,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:02,093 INFO L225 Difference]: With dead ends: 20 [2021-06-06 00:36:02,094 INFO L226 Difference]: Without dead ends: 16 [2021-06-06 00:36:02,095 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:36:02,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-06-06 00:36:02,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-06-06 00:36:02,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 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 00:36:02,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 27 transitions. [2021-06-06 00:36:02,116 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 27 transitions. Word has length 9 [2021-06-06 00:36:02,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:02,116 INFO L482 AbstractCegarLoop]: Abstraction has 16 states and 27 transitions. [2021-06-06 00:36:02,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:02,116 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 27 transitions. [2021-06-06 00:36:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-06 00:36:02,117 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:02,117 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:02,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-06 00:36:02,118 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:02,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:02,122 INFO L82 PathProgramCache]: Analyzing trace with hash 653163243, now seen corresponding path program 1 times [2021-06-06 00:36:02,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:02,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012851748] [2021-06-06 00:36:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:02,161 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 00:36:02,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:02,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012851748] [2021-06-06 00:36:02,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012851748] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-06 00:36:02,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-06 00:36:02,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-06 00:36:02,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256687112] [2021-06-06 00:36:02,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-06 00:36:02,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:02,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-06 00:36:02,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:36:02,165 INFO L87 Difference]: Start difference. First operand 16 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:02,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:02,175 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2021-06-06 00:36:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-06 00:36:02,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-06 00:36:02,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:02,177 INFO L225 Difference]: With dead ends: 21 [2021-06-06 00:36:02,177 INFO L226 Difference]: Without dead ends: 18 [2021-06-06 00:36:02,179 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-06 00:36:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-06 00:36:02,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-06 00:36:02,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 30 transitions. [2021-06-06 00:36:02,186 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 30 transitions. Word has length 10 [2021-06-06 00:36:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:02,186 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 30 transitions. [2021-06-06 00:36:02,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 30 transitions. [2021-06-06 00:36:02,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-06 00:36:02,186 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:02,187 INFO L554 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:02,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-06 00:36:02,187 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:02,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:02,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1382019562, now seen corresponding path program 1 times [2021-06-06 00:36:02,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:02,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306015769] [2021-06-06 00:36:02,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:02,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:02,223 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 00:36:02,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:02,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306015769] [2021-06-06 00:36:02,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306015769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:02,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042060456] [2021-06-06 00:36:02,224 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 00:36:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:02,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-06 00:36:02,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:02,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-06 00:36:02,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:36:02,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:02,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:36:02,333 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-06 00:36:02,343 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 00:36:02,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042060456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:02,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:02,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-06 00:36:02,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735517299] [2021-06-06 00:36:02,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:36:02,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:02,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:36:02,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:36:02,351 INFO L87 Difference]: Start difference. First operand 18 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:02,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:02,386 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2021-06-06 00:36:02,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:36:02,387 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-06 00:36:02,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:02,388 INFO L225 Difference]: With dead ends: 25 [2021-06-06 00:36:02,388 INFO L226 Difference]: Without dead ends: 21 [2021-06-06 00:36:02,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:36:02,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-06-06 00:36:02,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-06-06 00:36:02,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 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 00:36:02,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2021-06-06 00:36:02,391 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2021-06-06 00:36:02,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:02,391 INFO L482 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2021-06-06 00:36:02,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:02,391 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2021-06-06 00:36:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-06 00:36:02,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:02,391 INFO L554 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:02,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-06 00:36:02,605 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:02,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:02,605 INFO L82 PathProgramCache]: Analyzing trace with hash 107792461, now seen corresponding path program 2 times [2021-06-06 00:36:02,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:02,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755677699] [2021-06-06 00:36:02,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:02,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:02,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:02,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755677699] [2021-06-06 00:36:02,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755677699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:02,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157477546] [2021-06-06 00:36:02,636 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 00:36:02,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:36:02,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:02,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-06 00:36:02,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:02,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157477546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:02,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:02,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-06 00:36:02,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052543274] [2021-06-06 00:36:02,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-06 00:36:02,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:02,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-06 00:36:02,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-06 00:36:02,739 INFO L87 Difference]: Start difference. First operand 21 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:02,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:02,746 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2021-06-06 00:36:02,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-06 00:36:02,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-06 00:36:02,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:02,747 INFO L225 Difference]: With dead ends: 50 [2021-06-06 00:36:02,747 INFO L226 Difference]: Without dead ends: 45 [2021-06-06 00:36:02,748 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-06 00:36:02,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-06 00:36:02,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-06-06 00:36:02,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 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 00:36:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-06-06 00:36:02,751 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-06-06 00:36:02,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:02,752 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-06-06 00:36:02,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:02,752 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-06-06 00:36:02,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-06 00:36:02,752 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:02,752 INFO L554 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:02,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:02,968 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:02,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:02,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1492763464, now seen corresponding path program 3 times [2021-06-06 00:36:02,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:02,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332482656] [2021-06-06 00:36:02,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:02,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:03,030 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 00:36:03,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:03,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332482656] [2021-06-06 00:36:03,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332482656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:03,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885307276] [2021-06-06 00:36:03,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:03,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-06 00:36:03,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:03,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-06 00:36:03,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:03,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-06 00:36:03,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:36:03,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:03,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:36:03,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-06 00:36:03,140 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 00:36:03,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885307276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:03,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:03,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-06 00:36:03,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482414315] [2021-06-06 00:36:03,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-06 00:36:03,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:03,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-06 00:36:03,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:36:03,141 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:03,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:03,182 INFO L93 Difference]: Finished difference Result 65 states and 115 transitions. [2021-06-06 00:36:03,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:36:03,182 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-06 00:36:03,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:03,183 INFO L225 Difference]: With dead ends: 65 [2021-06-06 00:36:03,183 INFO L226 Difference]: Without dead ends: 39 [2021-06-06 00:36:03,183 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:36:03,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-06 00:36:03,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-06-06 00:36:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-06-06 00:36:03,186 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 13 [2021-06-06 00:36:03,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:03,186 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-06-06 00:36:03,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:03,186 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-06-06 00:36:03,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-06 00:36:03,187 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:03,187 INFO L554 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:03,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:03,401 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:03,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:03,401 INFO L82 PathProgramCache]: Analyzing trace with hash 969698795, now seen corresponding path program 4 times [2021-06-06 00:36:03,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:03,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768268068] [2021-06-06 00:36:03,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:03,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:03,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768268068] [2021-06-06 00:36:03,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768268068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:03,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752439096] [2021-06-06 00:36:03,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:03,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:36:03,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:03,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-06 00:36:03,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:03,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752439096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:03,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:03,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-06 00:36:03,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003716703] [2021-06-06 00:36:03,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-06 00:36:03,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:03,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-06 00:36:03,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:36:03,491 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:03,500 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2021-06-06 00:36:03,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-06 00:36:03,501 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-06 00:36:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:03,501 INFO L225 Difference]: With dead ends: 73 [2021-06-06 00:36:03,501 INFO L226 Difference]: Without dead ends: 66 [2021-06-06 00:36:03,502 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-06 00:36:03,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-06 00:36:03,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-06-06 00:36:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:03,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2021-06-06 00:36:03,510 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2021-06-06 00:36:03,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:03,510 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2021-06-06 00:36:03,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2021-06-06 00:36:03,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-06 00:36:03,517 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:03,517 INFO L554 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:03,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:03,718 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:03,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:03,718 INFO L82 PathProgramCache]: Analyzing trace with hash 433746838, now seen corresponding path program 5 times [2021-06-06 00:36:03,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:03,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025532894] [2021-06-06 00:36:03,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:03,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:03,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:03,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025532894] [2021-06-06 00:36:03,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025532894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:03,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804815171] [2021-06-06 00:36:03,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:03,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-06 00:36:03,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:03,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:36:03,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:08,109 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-06-06 00:36:08,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2021-06-06 00:36:08,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:36:08,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:08,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:36:08,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:3 [2021-06-06 00:36:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:08,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804815171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:08,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:08,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-06 00:36:08,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521835979] [2021-06-06 00:36:08,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:36:08,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:08,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:36:08,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=168, Unknown=2, NotChecked=0, Total=210 [2021-06-06 00:36:08,126 INFO L87 Difference]: Start difference. First operand 48 states and 95 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:10,781 WARN L205 SmtUtils]: Spent 2.28 s on a formula simplification that was a NOOP. DAG size: 26 [2021-06-06 00:36:12,832 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2021-06-06 00:36:16,912 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 24 [2021-06-06 00:36:20,982 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2021-06-06 00:36:21,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:21,013 INFO L93 Difference]: Finished difference Result 229 states and 428 transitions. [2021-06-06 00:36:21,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-06 00:36:21,014 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-06 00:36:21,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:21,015 INFO L225 Difference]: With dead ends: 229 [2021-06-06 00:36:21,015 INFO L226 Difference]: Without dead ends: 116 [2021-06-06 00:36:21,015 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 16893.3ms TimeCoverageRelationStatistics Valid=231, Invalid=821, Unknown=4, NotChecked=0, Total=1056 [2021-06-06 00:36:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-06 00:36:21,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 56. [2021-06-06 00:36:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:21,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 113 transitions. [2021-06-06 00:36:21,021 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 113 transitions. Word has length 15 [2021-06-06 00:36:21,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:21,022 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 113 transitions. [2021-06-06 00:36:21,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:21,022 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 113 transitions. [2021-06-06 00:36:21,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-06 00:36:21,022 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:21,022 INFO L554 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:21,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-06 00:36:21,237 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:21,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:21,237 INFO L82 PathProgramCache]: Analyzing trace with hash 908220856, now seen corresponding path program 6 times [2021-06-06 00:36:21,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:21,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583428231] [2021-06-06 00:36:21,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:21,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:21,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583428231] [2021-06-06 00:36:21,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583428231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:21,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134291754] [2021-06-06 00:36:21,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:21,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-06 00:36:21,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:21,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-06 00:36:21,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:21,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-06 00:36:21,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:36:21,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:21,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:36:21,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-06 00:36:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:21,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134291754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:21,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:21,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-06 00:36:21,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814634311] [2021-06-06 00:36:21,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:36:21,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:21,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:36:21,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:36:21,425 INFO L87 Difference]: Start difference. First operand 56 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:21,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:21,547 INFO L93 Difference]: Finished difference Result 121 states and 226 transitions. [2021-06-06 00:36:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:36:21,548 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-06 00:36:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:21,548 INFO L225 Difference]: With dead ends: 121 [2021-06-06 00:36:21,548 INFO L226 Difference]: Without dead ends: 77 [2021-06-06 00:36:21,549 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 137.5ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:36:21,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-06 00:36:21,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 36. [2021-06-06 00:36:21,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 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 00:36:21,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-06-06 00:36:21,551 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 17 [2021-06-06 00:36:21,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:21,551 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-06-06 00:36:21,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:21,551 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-06-06 00:36:21,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-06 00:36:21,552 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:21,552 INFO L554 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:21,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:21,768 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:21,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1909198613, now seen corresponding path program 7 times [2021-06-06 00:36:21,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:21,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747334628] [2021-06-06 00:36:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:21,818 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:21,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:21,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747334628] [2021-06-06 00:36:21,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747334628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:21,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273710621] [2021-06-06 00:36:21,819 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 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 00:36:21,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:21,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-06 00:36:21,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:21,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273710621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:21,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:21,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-06 00:36:21,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453174281] [2021-06-06 00:36:21,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-06 00:36:21,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:21,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-06 00:36:21,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:36:21,885 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:21,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:21,896 INFO L93 Difference]: Finished difference Result 128 states and 229 transitions. [2021-06-06 00:36:21,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-06 00:36:21,897 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-06 00:36:21,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:21,897 INFO L225 Difference]: With dead ends: 128 [2021-06-06 00:36:21,897 INFO L226 Difference]: Without dead ends: 117 [2021-06-06 00:36:21,898 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.8ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-06 00:36:21,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-06 00:36:21,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2021-06-06 00:36:21,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:21,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2021-06-06 00:36:21,902 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2021-06-06 00:36:21,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:21,902 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2021-06-06 00:36:21,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:21,902 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2021-06-06 00:36:21,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-06 00:36:21,902 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:21,902 INFO L554 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:22,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:22,123 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:22,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:22,123 INFO L82 PathProgramCache]: Analyzing trace with hash 119613718, now seen corresponding path program 8 times [2021-06-06 00:36:22,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:22,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073125759] [2021-06-06 00:36:22,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:22,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:22,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073125759] [2021-06-06 00:36:22,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073125759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:22,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083665046] [2021-06-06 00:36:22,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:22,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:36:22,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:22,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-06 00:36:22,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:22,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-06 00:36:22,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:36:22,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:22,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:36:22,317 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-06 00:36:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:22,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083665046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:22,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:22,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-06 00:36:22,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423922613] [2021-06-06 00:36:22,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-06 00:36:22,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:22,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-06 00:36:22,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-06-06 00:36:22,322 INFO L87 Difference]: Start difference. First operand 87 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:22,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:22,535 INFO L93 Difference]: Finished difference Result 179 states and 337 transitions. [2021-06-06 00:36:22,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-06 00:36:22,536 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-06 00:36:22,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:22,536 INFO L225 Difference]: With dead ends: 179 [2021-06-06 00:36:22,536 INFO L226 Difference]: Without dead ends: 105 [2021-06-06 00:36:22,537 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-06 00:36:22,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-06 00:36:22,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2021-06-06 00:36:22,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:22,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-06-06 00:36:22,539 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 19 [2021-06-06 00:36:22,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:22,539 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-06-06 00:36:22,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:22,539 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-06-06 00:36:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-06 00:36:22,540 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:22,540 INFO L554 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:22,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-06 00:36:22,754 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:22,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:22,754 INFO L82 PathProgramCache]: Analyzing trace with hash -586216115, now seen corresponding path program 9 times [2021-06-06 00:36:22,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:22,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130953928] [2021-06-06 00:36:22,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:22,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:22,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130953928] [2021-06-06 00:36:22,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130953928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:22,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089903937] [2021-06-06 00:36:22,793 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 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 00:36:22,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-06 00:36:22,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:22,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-06 00:36:22,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:22,870 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:22,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089903937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:22,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:22,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-06 00:36:22,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521331123] [2021-06-06 00:36:22,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-06 00:36:22,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:22,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-06 00:36:22,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:36:22,871 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:22,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:22,885 INFO L93 Difference]: Finished difference Result 160 states and 290 transitions. [2021-06-06 00:36:22,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-06 00:36:22,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-06 00:36:22,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:22,886 INFO L225 Difference]: With dead ends: 160 [2021-06-06 00:36:22,886 INFO L226 Difference]: Without dead ends: 147 [2021-06-06 00:36:22,886 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-06 00:36:22,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-06 00:36:22,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-06-06 00:36:22,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:22,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-06-06 00:36:22,890 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 20 [2021-06-06 00:36:22,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:22,890 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-06-06 00:36:22,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:22,890 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-06-06 00:36:22,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-06 00:36:22,891 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:22,891 INFO L554 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:23,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:23,109 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:23,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:23,110 INFO L82 PathProgramCache]: Analyzing trace with hash -812718408, now seen corresponding path program 10 times [2021-06-06 00:36:23,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:23,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899759443] [2021-06-06 00:36:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:23,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:23,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899759443] [2021-06-06 00:36:23,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899759443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:23,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680929721] [2021-06-06 00:36:23,230 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 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 00:36:23,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:36:23,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:23,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-06 00:36:23,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:23,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-06 00:36:23,297 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:36:23,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:23,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:36:23,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-06 00:36:23,302 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:23,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680929721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:23,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:23,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-06 00:36:23,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129011668] [2021-06-06 00:36:23,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-06 00:36:23,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:23,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-06 00:36:23,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-06-06 00:36:23,304 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:23,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:23,530 INFO L93 Difference]: Finished difference Result 229 states and 435 transitions. [2021-06-06 00:36:23,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-06 00:36:23,530 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-06 00:36:23,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:23,531 INFO L225 Difference]: With dead ends: 229 [2021-06-06 00:36:23,531 INFO L226 Difference]: Without dead ends: 135 [2021-06-06 00:36:23,531 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-06 00:36:23,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-06 00:36:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2021-06-06 00:36:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:23,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 86 transitions. [2021-06-06 00:36:23,534 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 86 transitions. Word has length 21 [2021-06-06 00:36:23,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:23,534 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 86 transitions. [2021-06-06 00:36:23,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:23,534 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 86 transitions. [2021-06-06 00:36:23,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-06 00:36:23,534 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:23,534 INFO L554 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:23,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:23,741 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:23,741 INFO L82 PathProgramCache]: Analyzing trace with hash 576259051, now seen corresponding path program 11 times [2021-06-06 00:36:23,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:23,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840482330] [2021-06-06 00:36:23,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:23,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:23,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840482330] [2021-06-06 00:36:23,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840482330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:23,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177008411] [2021-06-06 00:36:23,789 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 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 00:36:23,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-06 00:36:23,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:23,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-06 00:36:23,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:23,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177008411] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:23,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:23,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-06 00:36:23,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071661298] [2021-06-06 00:36:23,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-06 00:36:23,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:23,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-06 00:36:23,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:36:23,873 INFO L87 Difference]: Start difference. First operand 46 states and 86 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 00:36:23,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:23,888 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2021-06-06 00:36:23,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-06 00:36:23,896 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 00:36:23,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:23,896 INFO L225 Difference]: With dead ends: 195 [2021-06-06 00:36:23,896 INFO L226 Difference]: Without dead ends: 180 [2021-06-06 00:36:23,897 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.9ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-06 00:36:23,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-06 00:36:23,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2021-06-06 00:36:23,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0948905109489053) internal successors, (287), 137 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:23,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 287 transitions. [2021-06-06 00:36:23,900 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 287 transitions. Word has length 22 [2021-06-06 00:36:23,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:23,900 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 287 transitions. [2021-06-06 00:36:23,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 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 00:36:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 287 transitions. [2021-06-06 00:36:23,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-06 00:36:23,901 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:23,901 INFO L554 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:24,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-06 00:36:24,117 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:24,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:24,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1950887574, now seen corresponding path program 12 times [2021-06-06 00:36:24,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:24,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806217569] [2021-06-06 00:36:24,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:24,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:24,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806217569] [2021-06-06 00:36:24,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806217569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:24,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580199231] [2021-06-06 00:36:24,264 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 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 00:36:24,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-06 00:36:24,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:24,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-06 00:36:24,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:24,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-06 00:36:24,359 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:36:24,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:24,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:36:24,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-06 00:36:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:24,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580199231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:24,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:24,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-06 00:36:24,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453865648] [2021-06-06 00:36:24,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-06 00:36:24,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:24,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-06 00:36:24,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-06-06 00:36:24,368 INFO L87 Difference]: Start difference. First operand 138 states and 287 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:24,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:24,697 INFO L93 Difference]: Finished difference Result 285 states and 545 transitions. [2021-06-06 00:36:24,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-06 00:36:24,698 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-06 00:36:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:24,699 INFO L225 Difference]: With dead ends: 285 [2021-06-06 00:36:24,699 INFO L226 Difference]: Without dead ends: 169 [2021-06-06 00:36:24,700 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 335.0ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-06-06 00:36:24,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-06 00:36:24,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 51. [2021-06-06 00:36:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.92) internal successors, (96), 50 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 96 transitions. [2021-06-06 00:36:24,702 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 96 transitions. Word has length 23 [2021-06-06 00:36:24,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:24,702 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 96 transitions. [2021-06-06 00:36:24,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:24,702 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 96 transitions. [2021-06-06 00:36:24,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-06 00:36:24,704 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:24,704 INFO L554 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:24,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-06 00:36:24,919 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:24,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:24,919 INFO L82 PathProgramCache]: Analyzing trace with hash 348698573, now seen corresponding path program 13 times [2021-06-06 00:36:24,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:24,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859170272] [2021-06-06 00:36:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:24,984 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:24,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:24,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859170272] [2021-06-06 00:36:24,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859170272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:24,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591642842] [2021-06-06 00:36:24,985 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 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 00:36:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:25,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-06 00:36:25,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:25,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591642842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:25,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:25,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-06 00:36:25,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485812323] [2021-06-06 00:36:25,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-06 00:36:25,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:25,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-06 00:36:25,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:36:25,082 INFO L87 Difference]: Start difference. First operand 51 states and 96 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:25,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:25,100 INFO L93 Difference]: Finished difference Result 233 states and 430 transitions. [2021-06-06 00:36:25,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-06 00:36:25,100 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-06 00:36:25,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:25,101 INFO L225 Difference]: With dead ends: 233 [2021-06-06 00:36:25,101 INFO L226 Difference]: Without dead ends: 216 [2021-06-06 00:36:25,101 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-06 00:36:25,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-06 00:36:25,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 168. [2021-06-06 00:36:25,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.095808383233533) internal successors, (350), 167 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 350 transitions. [2021-06-06 00:36:25,108 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 350 transitions. Word has length 24 [2021-06-06 00:36:25,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:25,108 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 350 transitions. [2021-06-06 00:36:25,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:25,108 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 350 transitions. [2021-06-06 00:36:25,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-06 00:36:25,110 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:25,110 INFO L554 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:25,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-06 00:36:25,310 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:25,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:25,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1483217992, now seen corresponding path program 14 times [2021-06-06 00:36:25,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:25,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846277461] [2021-06-06 00:36:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:25,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:25,484 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:25,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:25,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846277461] [2021-06-06 00:36:25,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846277461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:25,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790039019] [2021-06-06 00:36:25,484 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 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 00:36:25,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-06 00:36:25,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:25,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-06 00:36:25,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:25,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-06 00:36:25,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:36:25,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:25,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:36:25,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-06 00:36:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:25,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790039019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:25,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:25,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-06 00:36:25,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448636205] [2021-06-06 00:36:25,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-06 00:36:25,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:25,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-06 00:36:25,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-06-06 00:36:25,585 INFO L87 Difference]: Start difference. First operand 168 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 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 00:36:25,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:25,958 INFO L93 Difference]: Finished difference Result 347 states and 667 transitions. [2021-06-06 00:36:25,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-06 00:36:25,958 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 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 00:36:25,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:25,959 INFO L225 Difference]: With dead ends: 347 [2021-06-06 00:36:25,959 INFO L226 Difference]: Without dead ends: 207 [2021-06-06 00:36:25,960 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 404.8ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-06-06 00:36:25,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-06 00:36:25,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 56. [2021-06-06 00:36:25,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 106 transitions. [2021-06-06 00:36:25,961 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 106 transitions. Word has length 25 [2021-06-06 00:36:25,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:25,961 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 106 transitions. [2021-06-06 00:36:25,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 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 00:36:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 106 transitions. [2021-06-06 00:36:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-06 00:36:25,962 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:25,962 INFO L554 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:26,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:26,178 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:26,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:26,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1265608427, now seen corresponding path program 15 times [2021-06-06 00:36:26,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:26,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789607815] [2021-06-06 00:36:26,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:26,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:26,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789607815] [2021-06-06 00:36:26,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789607815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:26,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492228956] [2021-06-06 00:36:26,256 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 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 00:36:26,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-06 00:36:26,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:26,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-06 00:36:26,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:26,339 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:26,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492228956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:26,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:26,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-06 00:36:26,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622020153] [2021-06-06 00:36:26,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-06 00:36:26,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:26,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-06 00:36:26,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:36:26,340 INFO L87 Difference]: Start difference. First operand 56 states and 106 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:26,360 INFO L93 Difference]: Finished difference Result 274 states and 509 transitions. [2021-06-06 00:36:26,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-06 00:36:26,360 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-06 00:36:26,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:26,361 INFO L225 Difference]: With dead ends: 274 [2021-06-06 00:36:26,361 INFO L226 Difference]: Without dead ends: 255 [2021-06-06 00:36:26,361 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.3ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-06-06 00:36:26,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-06 00:36:26,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-06-06 00:36:26,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.095) internal successors, (419), 200 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 419 transitions. [2021-06-06 00:36:26,365 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 419 transitions. Word has length 26 [2021-06-06 00:36:26,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:26,365 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 419 transitions. [2021-06-06 00:36:26,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:26,365 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 419 transitions. [2021-06-06 00:36:26,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-06 00:36:26,366 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:26,366 INFO L554 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:26,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-06 00:36:26,584 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:26,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:26,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1730380822, now seen corresponding path program 16 times [2021-06-06 00:36:26,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:26,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983320923] [2021-06-06 00:36:26,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:26,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:26,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983320923] [2021-06-06 00:36:26,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983320923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:26,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404683699] [2021-06-06 00:36:26,812 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 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 00:36:26,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-06 00:36:26,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:26,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-06 00:36:26,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:26,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-06 00:36:26,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:36:26,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:36:26,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:36:26,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-06 00:36:26,904 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:26,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404683699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:26,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:26,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-06-06 00:36:26,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954025999] [2021-06-06 00:36:26,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-06 00:36:26,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:26,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-06 00:36:26,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-06-06 00:36:26,905 INFO L87 Difference]: Start difference. First operand 201 states and 419 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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 00:36:27,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:27,387 INFO L93 Difference]: Finished difference Result 415 states and 801 transitions. [2021-06-06 00:36:27,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-06 00:36:27,387 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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 27 [2021-06-06 00:36:27,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:27,388 INFO L225 Difference]: With dead ends: 415 [2021-06-06 00:36:27,388 INFO L226 Difference]: Without dead ends: 249 [2021-06-06 00:36:27,388 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 490.3ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-06-06 00:36:27,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-06 00:36:27,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 61. [2021-06-06 00:36:27,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:27,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-06-06 00:36:27,390 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 27 [2021-06-06 00:36:27,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:27,391 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-06-06 00:36:27,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 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 00:36:27,391 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-06-06 00:36:27,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-06 00:36:27,391 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:27,391 INFO L554 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:27,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-06 00:36:27,605 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:27,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:27,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2102923853, now seen corresponding path program 17 times [2021-06-06 00:36:27,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:27,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136952910] [2021-06-06 00:36:27,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:27,683 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:27,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:27,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136952910] [2021-06-06 00:36:27,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136952910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:27,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211594516] [2021-06-06 00:36:27,684 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 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 00:36:27,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-06 00:36:27,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:27,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-06 00:36:27,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:36:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:27,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211594516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:27,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:36:27,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-06 00:36:27,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141235368] [2021-06-06 00:36:27,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-06 00:36:27,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:36:27,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-06 00:36:27,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:36:27,785 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:27,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-06 00:36:27,845 INFO L93 Difference]: Finished difference Result 318 states and 594 transitions. [2021-06-06 00:36:27,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-06 00:36:27,846 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 00:36:27,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-06 00:36:27,847 INFO L225 Difference]: With dead ends: 318 [2021-06-06 00:36:27,847 INFO L226 Difference]: Without dead ends: 297 [2021-06-06 00:36:27,847 INFO L810 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-06 00:36:27,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-06 00:36:27,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 237. [2021-06-06 00:36:27,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.093220338983051) internal successors, (494), 236 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:27,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 494 transitions. [2021-06-06 00:36:27,851 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 494 transitions. Word has length 28 [2021-06-06 00:36:27,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-06 00:36:27,851 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 494 transitions. [2021-06-06 00:36:27,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-06 00:36:27,851 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 494 transitions. [2021-06-06 00:36:27,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-06 00:36:27,851 INFO L546 BasicCegarLoop]: Found error trace [2021-06-06 00:36:27,851 INFO L554 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-06 00:36:28,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:28,052 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-06 00:36:28,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-06 00:36:28,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2072596664, now seen corresponding path program 18 times [2021-06-06 00:36:28,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-06 00:36:28,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436384220] [2021-06-06 00:36:28,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-06 00:36:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-06 00:36:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:36:28,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-06 00:36:28,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436384220] [2021-06-06 00:36:28,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436384220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:36:28,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194295317] [2021-06-06 00:36:28,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:36:28,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-06 00:36:28,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-06 00:36:28,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-06 00:36:28,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-06 00:37:07,763 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-06-06 00:37:07,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2021-06-06 00:37:07,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-06 00:37:07,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-06 00:37:07,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-06 00:37:07,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:3 [2021-06-06 00:37:07,774 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 65 refuted. 41 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-06 00:37:07,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194295317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-06 00:37:07,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-06 00:37:07,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-06 00:37:07,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654191742] [2021-06-06 00:37:07,775 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-06 00:37:07,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-06 00:37:07,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-06 00:37:07,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1532, Unknown=42, NotChecked=0, Total=1806 [2021-06-06 00:37:07,776 INFO L87 Difference]: Start difference. First operand 237 states and 494 transitions. Second operand has 43 states, 43 states have (on average 1.255813953488372) internal successors, (54), 42 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 00:37:11,908 WARN L205 SmtUtils]: Spent 3.85 s on a formula simplification. DAG size of input: 82 DAG size of output: 66 [2021-06-06 00:37:14,748 WARN L205 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-06-06 00:37:15,496 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 39 [2021-06-06 00:37:15,646 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2021-06-06 00:37:18,125 WARN L205 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 72 DAG size of output: 40 [2021-06-06 00:37:18,633 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-06 00:37:26,265 WARN L205 SmtUtils]: Spent 3.28 s on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-06 00:37:27,758 WARN L205 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2021-06-06 00:37:32,817 WARN L205 SmtUtils]: Spent 5.02 s on a formula simplification. DAG size of input: 78 DAG size of output: 45 [2021-06-06 00:37:38,179 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 50 [2021-06-06 00:37:41,330 WARN L205 SmtUtils]: Spent 931.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-06-06 00:37:48,383 WARN L205 SmtUtils]: Spent 4.98 s on a formula simplification. DAG size of input: 69 DAG size of output: 36 [2021-06-06 00:37:53,176 WARN L205 SmtUtils]: Spent 4.75 s on a formula simplification. DAG size of input: 84 DAG size of output: 42 [2021-06-06 00:37:56,843 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-06-06 00:37:59,202 WARN L205 SmtUtils]: Spent 1.78 s on a formula simplification that was a NOOP. DAG size: 54 [2021-06-06 00:38:07,245 WARN L205 SmtUtils]: Spent 3.10 s on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-06-06 00:38:13,023 WARN L205 SmtUtils]: Spent 5.55 s on a formula simplification. DAG size of input: 75 DAG size of output: 25 [2021-06-06 00:38:21,654 WARN L205 SmtUtils]: Spent 8.58 s on a formula simplification. DAG size of input: 81 DAG size of output: 39 [2021-06-06 00:38:33,870 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2021-06-06 00:38:40,685 WARN L205 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-06-06 00:38:47,640 WARN L205 SmtUtils]: Spent 4.69 s on a formula simplification. DAG size of input: 66 DAG size of output: 41 [2021-06-06 00:39:02,157 WARN L205 SmtUtils]: Spent 10.44 s on a formula simplification. DAG size of input: 81 DAG size of output: 48 [2021-06-06 00:39:12,103 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-06 00:39:14,839 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-06-06 00:39:25,759 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-06 00:39:39,168 WARN L205 SmtUtils]: Spent 5.56 s on a formula simplification that was a NOOP. DAG size: 58 [2021-06-06 00:39:56,596 WARN L205 SmtUtils]: Spent 9.29 s on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2021-06-06 00:40:15,891 WARN L205 SmtUtils]: Spent 17.22 s on a formula simplification. DAG size of input: 79 DAG size of output: 71 [2021-06-06 00:40:55,213 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 41 [2021-06-06 00:41:18,862 WARN L205 SmtUtils]: Spent 7.76 s on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-06-06 00:41:34,419 WARN L205 SmtUtils]: Spent 11.11 s on a formula simplification that was a NOOP. DAG size: 79 [2021-06-06 00:41:51,192 WARN L205 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-06-06 00:42:04,364 WARN L205 SmtUtils]: Spent 2.50 s on a formula simplification that was a NOOP. DAG size: 40 [2021-06-06 00:42:08,322 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-06-06 00:42:28,198 WARN L205 SmtUtils]: Spent 1.80 s on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2021-06-06 00:42:46,642 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification that was a NOOP. DAG size: 48 [2021-06-06 00:43:06,816 WARN L205 SmtUtils]: Spent 6.53 s on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2021-06-06 00:43:36,490 WARN L205 SmtUtils]: Spent 20.34 s on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2021-06-06 00:44:05,711 WARN L205 SmtUtils]: Spent 23.03 s on a formula simplification. DAG size of input: 77 DAG size of output: 52 [2021-06-06 00:44:43,142 WARN L205 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-06 00:44:55,896 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 39 [2021-06-06 00:45:12,698 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-06-06 00:45:27,902 WARN L205 SmtUtils]: Spent 2.78 s on a formula simplification that was a NOOP. DAG size: 46 [2021-06-06 00:45:48,336 WARN L205 SmtUtils]: Spent 3.63 s on a formula simplification that was a NOOP. DAG size: 54 [2021-06-06 00:46:12,858 WARN L205 SmtUtils]: Spent 5.68 s on a formula simplification that was a NOOP. DAG size: 61 [2021-06-06 00:46:56,377 WARN L205 SmtUtils]: Spent 30.32 s on a formula simplification. DAG size of input: 77 DAG size of output: 51 [2021-06-06 00:47:41,934 WARN L205 SmtUtils]: Spent 330.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-06-06 00:47:51,993 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-06-06 00:48:16,851 WARN L205 SmtUtils]: Spent 776.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-06-06 00:48:41,016 WARN L205 SmtUtils]: Spent 3.46 s on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2021-06-06 00:48:59,853 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-06-06 00:49:28,237 WARN L205 SmtUtils]: Spent 7.23 s on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-06-06 00:50:09,638 WARN L205 SmtUtils]: Spent 14.07 s on a formula simplification that was a NOOP. DAG size: 68 Received shutdown request... [2021-06-06 00:50:54,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-06-06 00:50:55,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-06 00:50:55,015 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-06 00:50:55,017 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-06 00:50:55,018 WARN L196 ceAbstractionStarter]: Timeout [2021-06-06 00:50:55,018 INFO L202 PluginConnector]: Adding new model context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.06 12:50:55 BasicIcfg [2021-06-06 00:50:55,018 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-06 00:50:55,019 INFO L168 Benchmark]: Toolchain (without parser) took 893455.92 ms. Allocated memory is still 367.0 MB. Free memory was 346.9 MB in the beginning and 272.7 MB in the end (delta: 74.2 MB). Peak memory consumption was 77.2 MB. Max. memory is 16.0 GB. [2021-06-06 00:50:55,019 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 367.0 MB. Free memory was 348.0 MB in the beginning and 348.0 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:50:55,019 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.11 ms. Allocated memory is still 367.0 MB. Free memory was 346.9 MB in the beginning and 345.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-06 00:50:55,019 INFO L168 Benchmark]: Boogie Preprocessor took 12.44 ms. Allocated memory is still 367.0 MB. Free memory was 345.4 MB in the beginning and 344.5 MB in the end (delta: 916.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-06 00:50:55,019 INFO L168 Benchmark]: RCFGBuilder took 216.16 ms. Allocated memory is still 367.0 MB. Free memory was 344.4 MB in the beginning and 332.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-06 00:50:55,019 INFO L168 Benchmark]: TraceAbstraction took 893204.92 ms. Allocated memory is still 367.0 MB. Free memory was 332.4 MB in the beginning and 272.7 MB in the end (delta: 59.7 MB). Peak memory consumption was 62.5 MB. Max. memory is 16.0 GB. [2021-06-06 00:50:55,019 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 0.11 ms. Allocated memory is still 367.0 MB. Free memory was 348.0 MB in the beginning and 348.0 MB in the end (delta: 75.0 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.11 ms. Allocated memory is still 367.0 MB. Free memory was 346.9 MB in the beginning and 345.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.44 ms. Allocated memory is still 367.0 MB. Free memory was 345.4 MB in the beginning and 344.5 MB in the end (delta: 916.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 216.16 ms. Allocated memory is still 367.0 MB. Free memory was 344.4 MB in the beginning and 332.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 893204.92 ms. Allocated memory is still 367.0 MB. Free memory was 332.4 MB in the beginning and 272.7 MB in the end (delta: 59.7 MB). Peak memory consumption was 62.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (237states) and FLOYD_HOARE automaton (currently 102 states, 43 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 142 known predicates. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 893131.0ms, OverallIterations: 20, TraceHistogramMax: 10, EmptinessCheckTime: 21.9ms, AutomataDifference: 842007.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 28.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 655 SDtfs, 2792 SDslu, 5529 SDs, 0 SdLazy, 1661 SolverSat, 812 SolverUnsat, 69 SolverUnknown, 0 SolverNotchecked, 35413.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 791 GetRequests, 373 SyntacticMatches, 18 SemanticMatches, 399 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6779 ImplicationChecksByTransitivity, 843528.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=237occurred in iteration=19, InterpolantAutomatonStates: 202, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 79.8ms AutomataMinimizationTime, 19 MinimizatonAttempts, 1024 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 78.0ms SsaConstructionTime, 304.8ms SatisfiabilityAnalysisTime, 46267.6ms InterpolantComputationTime, 747 NumberOfCodeBlocks, 747 NumberOfCodeBlocksAsserted, 72 NumberOfCheckSat, 709 ConstructedInterpolants, 19 QuantifiedInterpolants, 3222 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1519 ConjunctsInSsa, 352 ConjunctsInUnsatCore, 38 InterpolantComputations, 2 PerfectInterpolantSequences, 424/1617 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