/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/unroll-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:25:46,659 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:25:46,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:25:46,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 21:25:46,728 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 [2021-03-10 21:25:46,747 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:25:46,747 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:25:46,747 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:25:46,748 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:25:46,749 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:25:46,749 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:25:46,749 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:25:46,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:25:46,749 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:25:46,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:25:46,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:25:46,750 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:25:46,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:25:46,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:25:46,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:25:46,750 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:25:46,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:25:46,751 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:25:46,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:25:46,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:25:46,751 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:25:46,751 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:25:46,751 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:25:46,751 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:25:46,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:25:46,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:25:46,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:25:46,752 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:25:46,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:25:46,752 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:25:46,752 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:25:46,753 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:25:47,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:25:47,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:25:47,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:25:47,029 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:25:47,030 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:25:47,031 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl [2021-03-10 21:25:47,031 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl' [2021-03-10 21:25:47,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:25:47,271 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:25:47,271 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:25:47,272 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:25:47,272 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:25:47,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:25:47" (1/1) ... [2021-03-10 21:25:47,292 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:25:47" (1/1) ... [2021-03-10 21:25:47,298 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:25:47,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:25:47,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:25:47,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:25:47,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:25:47" (1/1) ... [2021-03-10 21:25:47,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:25:47" (1/1) ... [2021-03-10 21:25:47,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:25:47" (1/1) ... [2021-03-10 21:25:47,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:25:47" (1/1) ... [2021-03-10 21:25:47,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:25:47" (1/1) ... [2021-03-10 21:25:47,315 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:25:47" (1/1) ... [2021-03-10 21:25:47,316 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:25:47" (1/1) ... [2021-03-10 21:25:47,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:25:47,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:25:47,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:25:47,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:25:47,321 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:25:47" (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 [2021-03-10 21:25:47,387 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:25:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:25:47,388 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:25:47,388 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:25:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:25:47,388 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:25:47,388 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:25:47,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:25:47,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:25:47,389 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:25:47,669 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:25:47,669 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-10 21:25:47,670 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-03-10 21:25:47,670 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-03-10 21:25:47,684 INFO L202 PluginConnector]: Adding new model unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:25:47 BoogieIcfgContainer [2021-03-10 21:25:47,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:25:47,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:25:47,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:25:47,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:25:47,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:25:47" (1/2) ... [2021-03-10 21:25:47,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a1036d and model type unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:25:47, skipping insertion in model container [2021-03-10 21:25:47,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:25:47" (2/2) ... [2021-03-10 21:25:47,689 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.bpl [2021-03-10 21:25:47,693 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:25:47,693 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:25:47,696 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:25:47,696 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:25:47,760 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 21:25:47,772 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 21:25:47,787 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:25:47,787 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:25:47,787 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:25:47,787 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:25:47,788 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:25:47,788 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:25:47,788 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:25:47,788 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:25:47,795 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-03-10 21:25:47,801 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) [2021-03-10 21:25:47,803 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) [2021-03-10 21:25:47,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-03-10 21:25:47,807 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:47,808 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:47,808 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:47,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:47,812 INFO L82 PathProgramCache]: Analyzing trace with hash -525039273, now seen corresponding path program 1 times [2021-03-10 21:25:47,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:47,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032375940] [2021-03-10 21:25:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:47,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:47,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032375940] [2021-03-10 21:25:47,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:25:47,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 21:25:47,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013510029] [2021-03-10 21:25:47,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 21:25:47,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:47,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 21:25:47,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:25:47,932 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) [2021-03-10 21:25:47,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:47,946 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-03-10 21:25:47,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 21:25:47,948 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 [2021-03-10 21:25:47,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:47,954 INFO L225 Difference]: With dead ends: 22 [2021-03-10 21:25:47,955 INFO L226 Difference]: Without dead ends: 19 [2021-03-10 21:25:47,956 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:25:47,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-03-10 21:25:47,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-03-10 21:25:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:47,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-03-10 21:25:47,978 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-03-10 21:25:47,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:47,978 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-03-10 21:25:47,978 INFO L481 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) [2021-03-10 21:25:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-03-10 21:25:47,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:25:47,979 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:47,979 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:47,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:25:47,979 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:47,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:47,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1892497481, now seen corresponding path program 1 times [2021-03-10 21:25:47,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:47,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560521268] [2021-03-10 21:25:47,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:47,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:48,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560521268] [2021-03-10 21:25:48,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368268712] [2021-03-10 21:25:48,014 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 [2021-03-10 21:25:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:48,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 21:25:48,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:48,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:48,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:48,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-03-10 21:25:48,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346663209] [2021-03-10 21:25:48,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:25:48,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:48,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:25:48,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:25:48,120 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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) [2021-03-10 21:25:48,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:48,151 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-03-10 21:25:48,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:25:48,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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 10 [2021-03-10 21:25:48,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:48,152 INFO L225 Difference]: With dead ends: 28 [2021-03-10 21:25:48,152 INFO L226 Difference]: Without dead ends: 28 [2021-03-10 21:25:48,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:25:48,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-03-10 21:25:48,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-03-10 21:25:48,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:48,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-03-10 21:25:48,157 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-03-10 21:25:48,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:48,157 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-03-10 21:25:48,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 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) [2021-03-10 21:25:48,157 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-03-10 21:25:48,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:25:48,158 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:48,158 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:48,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-10 21:25:48,382 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:48,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:48,382 INFO L82 PathProgramCache]: Analyzing trace with hash 904379190, now seen corresponding path program 1 times [2021-03-10 21:25:48,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:48,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457931841] [2021-03-10 21:25:48,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:48,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:48,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457931841] [2021-03-10 21:25:48,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:25:48,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:25:48,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352266116] [2021-03-10 21:25:48,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:25:48,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:48,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:25:48,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:25:48,406 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-03-10 21:25:48,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:48,432 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-03-10 21:25:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:25:48,433 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 [2021-03-10 21:25:48,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:48,437 INFO L225 Difference]: With dead ends: 22 [2021-03-10 21:25:48,438 INFO L226 Difference]: Without dead ends: 18 [2021-03-10 21:25:48,438 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:25:48,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-03-10 21:25:48,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-03-10 21:25:48,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-03-10 21:25:48,450 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-03-10 21:25:48,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:48,451 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-03-10 21:25:48,451 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-03-10 21:25:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-03-10 21:25:48,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:25:48,462 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:48,462 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:48,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 21:25:48,463 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:48,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:48,464 INFO L82 PathProgramCache]: Analyzing trace with hash -974494568, now seen corresponding path program 2 times [2021-03-10 21:25:48,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:48,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22240010] [2021-03-10 21:25:48,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:48,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:48,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:48,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22240010] [2021-03-10 21:25:48,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:25:48,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:25:48,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913124029] [2021-03-10 21:25:48,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:25:48,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:48,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:25:48,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:25:48,506 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-03-10 21:25:48,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:48,523 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-03-10 21:25:48,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:25:48,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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 [2021-03-10 21:25:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:48,524 INFO L225 Difference]: With dead ends: 20 [2021-03-10 21:25:48,524 INFO L226 Difference]: Without dead ends: 20 [2021-03-10 21:25:48,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:25:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-03-10 21:25:48,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-03-10 21:25:48,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:48,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-03-10 21:25:48,527 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-03-10 21:25:48,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:48,528 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-03-10 21:25:48,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 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) [2021-03-10 21:25:48,528 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-03-10 21:25:48,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:25:48,528 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:48,529 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:48,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 21:25:48,529 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:48,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:48,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1462847702, now seen corresponding path program 1 times [2021-03-10 21:25:48,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:48,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717405407] [2021-03-10 21:25:48,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:48,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717405407] [2021-03-10 21:25:48,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687040511] [2021-03-10 21:25:48,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-03-10 21:25:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:48,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:25:48,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:48,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:48,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:48,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-03-10 21:25:48,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938755742] [2021-03-10 21:25:48,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:25:48,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:48,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:25:48,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:25:48,684 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:48,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:48,696 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-03-10 21:25:48,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:25:48,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-03-10 21:25:48,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:48,697 INFO L225 Difference]: With dead ends: 24 [2021-03-10 21:25:48,697 INFO L226 Difference]: Without dead ends: 24 [2021-03-10 21:25:48,697 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:25:48,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-03-10 21:25:48,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-03-10 21:25:48,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:48,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-03-10 21:25:48,700 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-03-10 21:25:48,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:48,700 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-03-10 21:25:48,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:48,701 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-03-10 21:25:48,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:25:48,701 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:48,701 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:48,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:48,911 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:48,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:48,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1595502390, now seen corresponding path program 2 times [2021-03-10 21:25:48,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:48,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830812381] [2021-03-10 21:25:48,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:48,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:48,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830812381] [2021-03-10 21:25:48,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942740749] [2021-03-10 21:25:48,981 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 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 [2021-03-10 21:25:49,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:49,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:49,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:25:49,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:49,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:49,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:49,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-03-10 21:25:49,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009497034] [2021-03-10 21:25:49,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:25:49,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:49,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:25:49,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:25:49,070 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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) [2021-03-10 21:25:49,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:49,092 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-03-10 21:25:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:25:49,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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 12 [2021-03-10 21:25:49,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:49,094 INFO L225 Difference]: With dead ends: 28 [2021-03-10 21:25:49,094 INFO L226 Difference]: Without dead ends: 28 [2021-03-10 21:25:49,094 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:25:49,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-03-10 21:25:49,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-03-10 21:25:49,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:49,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-03-10 21:25:49,098 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-03-10 21:25:49,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:49,098 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-03-10 21:25:49,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 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) [2021-03-10 21:25:49,098 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-03-10 21:25:49,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:25:49,099 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:49,099 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:49,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:49,320 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:49,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:49,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1412830422, now seen corresponding path program 3 times [2021-03-10 21:25:49,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:49,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679345905] [2021-03-10 21:25:49,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:49,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:49,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679345905] [2021-03-10 21:25:49,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826259787] [2021-03-10 21:25:49,419 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:25:49,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:25:49,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:49,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:25:49,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:49,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:49,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:49,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 21:25:49,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622401305] [2021-03-10 21:25:49,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:25:49,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:49,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:25:49,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:25:49,543 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-03-10 21:25:49,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:49,594 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2021-03-10 21:25:49,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:25:49,596 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:25:49,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:49,598 INFO L225 Difference]: With dead ends: 32 [2021-03-10 21:25:49,598 INFO L226 Difference]: Without dead ends: 32 [2021-03-10 21:25:49,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:25:49,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-03-10 21:25:49,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-03-10 21:25:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:49,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2021-03-10 21:25:49,609 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2021-03-10 21:25:49,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:49,610 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2021-03-10 21:25:49,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 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) [2021-03-10 21:25:49,610 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-03-10 21:25:49,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:25:49,611 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:49,611 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:49,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:49,827 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:49,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:49,828 INFO L82 PathProgramCache]: Analyzing trace with hash 44966710, now seen corresponding path program 4 times [2021-03-10 21:25:49,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:49,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009216950] [2021-03-10 21:25:49,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:49,881 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:49,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009216950] [2021-03-10 21:25:49,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497584667] [2021-03-10 21:25:49,882 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 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 [2021-03-10 21:25:49,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:49,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:49,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:25:49,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:50,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:25:50,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:25:50,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:25:50,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:25:50,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:25:50,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:25:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:50,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:50,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-03-10 21:25:50,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107204299] [2021-03-10 21:25:50,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:25:50,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:50,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:25:50,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:25:50,135 INFO L87 Difference]: Start difference. First operand 32 states and 59 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-03-10 21:25:50,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:50,226 INFO L93 Difference]: Finished difference Result 80 states and 142 transitions. [2021-03-10 21:25:50,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:25:50,226 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:25:50,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:50,229 INFO L225 Difference]: With dead ends: 80 [2021-03-10 21:25:50,229 INFO L226 Difference]: Without dead ends: 77 [2021-03-10 21:25:50,230 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:25:50,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-03-10 21:25:50,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 44. [2021-03-10 21:25:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.186046511627907) internal successors, (94), 43 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 94 transitions. [2021-03-10 21:25:50,242 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 94 transitions. Word has length 14 [2021-03-10 21:25:50,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:50,243 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 94 transitions. [2021-03-10 21:25:50,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 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) [2021-03-10 21:25:50,243 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 94 transitions. [2021-03-10 21:25:50,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:25:50,244 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:50,244 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:50,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:50,461 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:50,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:50,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1649963104, now seen corresponding path program 5 times [2021-03-10 21:25:50,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:50,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689083806] [2021-03-10 21:25:50,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:50,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689083806] [2021-03-10 21:25:50,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626595589] [2021-03-10 21:25:50,516 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 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 [2021-03-10 21:25:50,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:25:50,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:50,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:25:50,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:50,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:25:50,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:25:50,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:25:50,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:25:50,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:25:50,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:25:50,736 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:50,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:50,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-03-10 21:25:50,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855720568] [2021-03-10 21:25:50,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:25:50,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:50,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:25:50,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:25:50,738 INFO L87 Difference]: Start difference. First operand 44 states and 94 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2021-03-10 21:25:50,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:50,825 INFO L93 Difference]: Finished difference Result 89 states and 171 transitions. [2021-03-10 21:25:50,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:25:50,826 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 14 [2021-03-10 21:25:50,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:50,826 INFO L225 Difference]: With dead ends: 89 [2021-03-10 21:25:50,826 INFO L226 Difference]: Without dead ends: 86 [2021-03-10 21:25:50,827 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:25:50,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-03-10 21:25:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2021-03-10 21:25:50,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.38) internal successors, (119), 50 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 119 transitions. [2021-03-10 21:25:50,831 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 119 transitions. Word has length 14 [2021-03-10 21:25:50,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:50,832 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 119 transitions. [2021-03-10 21:25:50,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2021-03-10 21:25:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 119 transitions. [2021-03-10 21:25:50,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:25:50,832 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:50,832 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:51,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:51,046 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:51,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:51,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2019211880, now seen corresponding path program 6 times [2021-03-10 21:25:51,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:51,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463828490] [2021-03-10 21:25:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:51,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463828490] [2021-03-10 21:25:51,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022113707] [2021-03-10 21:25:51,086 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 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 [2021-03-10 21:25:51,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:25:51,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:51,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:25:51,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:51,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:25:51,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:25:51,228 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:25:51,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:25:51,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:25:51,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:25:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:51,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:51,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-03-10 21:25:51,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547437954] [2021-03-10 21:25:51,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:25:51,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:51,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:25:51,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:25:51,239 INFO L87 Difference]: Start difference. First operand 51 states and 119 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2021-03-10 21:25:51,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:51,310 INFO L93 Difference]: Finished difference Result 98 states and 200 transitions. [2021-03-10 21:25:51,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:25:51,310 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 14 [2021-03-10 21:25:51,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:51,311 INFO L225 Difference]: With dead ends: 98 [2021-03-10 21:25:51,311 INFO L226 Difference]: Without dead ends: 95 [2021-03-10 21:25:51,311 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:25:51,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-03-10 21:25:51,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2021-03-10 21:25:51,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.5344827586206895) internal successors, (147), 58 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:51,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2021-03-10 21:25:51,316 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 14 [2021-03-10 21:25:51,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:51,316 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2021-03-10 21:25:51,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2021-03-10 21:25:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2021-03-10 21:25:51,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:25:51,317 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:51,317 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:51,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 21:25:51,539 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:51,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:51,539 INFO L82 PathProgramCache]: Analyzing trace with hash 200480608, now seen corresponding path program 7 times [2021-03-10 21:25:51,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:51,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703106736] [2021-03-10 21:25:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:51,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:51,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703106736] [2021-03-10 21:25:51,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526974872] [2021-03-10 21:25:51,579 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 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 [2021-03-10 21:25:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:51,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:25:51,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:51,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:25:51,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:25:51,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:25:51,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:25:51,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:25:51,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:25:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:51,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:51,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-03-10 21:25:51,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312745199] [2021-03-10 21:25:51,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:25:51,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:51,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:25:51,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:25:51,799 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2021-03-10 21:25:51,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:51,866 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-03-10 21:25:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:25:51,866 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 14 [2021-03-10 21:25:51,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:51,867 INFO L225 Difference]: With dead ends: 108 [2021-03-10 21:25:51,867 INFO L226 Difference]: Without dead ends: 105 [2021-03-10 21:25:51,868 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:25:51,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-03-10 21:25:51,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2021-03-10 21:25:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.656716417910448) internal successors, (178), 67 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 178 transitions. [2021-03-10 21:25:51,873 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 178 transitions. Word has length 14 [2021-03-10 21:25:51,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:51,873 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 178 transitions. [2021-03-10 21:25:51,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2021-03-10 21:25:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 178 transitions. [2021-03-10 21:25:51,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:25:51,874 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:51,874 INFO L519 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:52,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-03-10 21:25:52,087 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:52,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:52,088 INFO L82 PathProgramCache]: Analyzing trace with hash 291471000, now seen corresponding path program 8 times [2021-03-10 21:25:52,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:52,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099124585] [2021-03-10 21:25:52,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:52,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099124585] [2021-03-10 21:25:52,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061944991] [2021-03-10 21:25:52,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 21:25:52,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:52,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:52,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:25:52,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:52,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:25:52,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:25:52,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:25:52,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:25:52,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:25:52,334 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:25:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:52,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:52,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-03-10 21:25:52,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151845398] [2021-03-10 21:25:52,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:25:52,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:52,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:25:52,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:25:52,346 INFO L87 Difference]: Start difference. First operand 68 states and 178 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2021-03-10 21:25:52,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:52,420 INFO L93 Difference]: Finished difference Result 119 states and 267 transitions. [2021-03-10 21:25:52,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:25:52,420 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 14 [2021-03-10 21:25:52,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:52,422 INFO L225 Difference]: With dead ends: 119 [2021-03-10 21:25:52,422 INFO L226 Difference]: Without dead ends: 116 [2021-03-10 21:25:52,423 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:25:52,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-03-10 21:25:52,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2021-03-10 21:25:52,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.730769230769231) internal successors, (213), 78 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:52,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 213 transitions. [2021-03-10 21:25:52,435 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 213 transitions. Word has length 14 [2021-03-10 21:25:52,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:52,435 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 213 transitions. [2021-03-10 21:25:52,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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) [2021-03-10 21:25:52,435 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 213 transitions. [2021-03-10 21:25:52,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:52,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:52,439 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:52,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 21:25:52,655 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:52,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:52,656 INFO L82 PathProgramCache]: Analyzing trace with hash 590864598, now seen corresponding path program 9 times [2021-03-10 21:25:52,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:52,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036736510] [2021-03-10 21:25:52,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:52,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:52,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036736510] [2021-03-10 21:25:52,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521763156] [2021-03-10 21:25:52,709 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 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 [2021-03-10 21:25:52,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:25:52,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:52,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:52,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:52,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:52,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:25:52,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201926259] [2021-03-10 21:25:52,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:25:52,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:52,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:25:52,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:25:52,800 INFO L87 Difference]: Start difference. First operand 79 states and 213 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:25:52,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:52,903 INFO L93 Difference]: Finished difference Result 141 states and 295 transitions. [2021-03-10 21:25:52,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:25:52,904 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-03-10 21:25:52,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:52,905 INFO L225 Difference]: With dead ends: 141 [2021-03-10 21:25:52,905 INFO L226 Difference]: Without dead ends: 141 [2021-03-10 21:25:52,905 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:52,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-03-10 21:25:52,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 81. [2021-03-10 21:25:52,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.7375) internal successors, (219), 80 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:52,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 219 transitions. [2021-03-10 21:25:52,909 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 219 transitions. Word has length 15 [2021-03-10 21:25:52,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:52,909 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 219 transitions. [2021-03-10 21:25:52,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:25:52,910 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 219 transitions. [2021-03-10 21:25:52,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:52,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:52,910 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:53,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:53,125 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1394695479, now seen corresponding path program 10 times [2021-03-10 21:25:53,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:53,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682245662] [2021-03-10 21:25:53,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:53,169 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:53,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682245662] [2021-03-10 21:25:53,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142406889] [2021-03-10 21:25:53,170 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 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 [2021-03-10 21:25:53,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:53,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:53,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:53,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:53,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:53,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:53,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:25:53,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215271189] [2021-03-10 21:25:53,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:25:53,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:53,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:25:53,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:25:53,244 INFO L87 Difference]: Start difference. First operand 81 states and 219 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:25:53,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:53,398 INFO L93 Difference]: Finished difference Result 161 states and 349 transitions. [2021-03-10 21:25:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:25:53,398 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-03-10 21:25:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:53,399 INFO L225 Difference]: With dead ends: 161 [2021-03-10 21:25:53,399 INFO L226 Difference]: Without dead ends: 156 [2021-03-10 21:25:53,399 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 108.1ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:25:53,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-03-10 21:25:53,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 98. [2021-03-10 21:25:53,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.731958762886598) internal successors, (265), 97 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 265 transitions. [2021-03-10 21:25:53,407 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 265 transitions. Word has length 15 [2021-03-10 21:25:53,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:53,407 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 265 transitions. [2021-03-10 21:25:53,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:25:53,407 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 265 transitions. [2021-03-10 21:25:53,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:53,408 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:53,408 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:53,611 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-03-10 21:25:53,611 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:53,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:53,611 INFO L82 PathProgramCache]: Analyzing trace with hash -359013994, now seen corresponding path program 11 times [2021-03-10 21:25:53,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:53,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59042770] [2021-03-10 21:25:53,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:53,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59042770] [2021-03-10 21:25:53,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697259161] [2021-03-10 21:25:53,666 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:25:53,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:25:53,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:53,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:53,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:53,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:53,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:25:53,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802053089] [2021-03-10 21:25:53,729 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:25:53,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:53,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:25:53,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:25:53,730 INFO L87 Difference]: Start difference. First operand 98 states and 265 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:53,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:53,814 INFO L93 Difference]: Finished difference Result 121 states and 296 transitions. [2021-03-10 21:25:53,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:25:53,814 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:25:53,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:53,815 INFO L225 Difference]: With dead ends: 121 [2021-03-10 21:25:53,815 INFO L226 Difference]: Without dead ends: 120 [2021-03-10 21:25:53,817 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:53,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-03-10 21:25:53,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2021-03-10 21:25:53,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:53,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2021-03-10 21:25:53,822 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2021-03-10 21:25:53,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:53,822 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2021-03-10 21:25:53,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:53,823 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2021-03-10 21:25:53,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:53,823 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:53,823 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:54,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:54,039 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:54,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:54,040 INFO L82 PathProgramCache]: Analyzing trace with hash 563404739, now seen corresponding path program 12 times [2021-03-10 21:25:54,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:54,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162467092] [2021-03-10 21:25:54,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:54,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:54,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162467092] [2021-03-10 21:25:54,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308811432] [2021-03-10 21:25:54,087 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 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 [2021-03-10 21:25:54,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:25:54,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:54,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:54,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:54,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:54,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:25:54,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354700337] [2021-03-10 21:25:54,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:25:54,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:54,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:25:54,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:25:54,151 INFO L87 Difference]: Start difference. First operand 99 states and 265 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:54,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:54,192 INFO L93 Difference]: Finished difference Result 166 states and 358 transitions. [2021-03-10 21:25:54,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:25:54,193 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:25:54,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:54,194 INFO L225 Difference]: With dead ends: 166 [2021-03-10 21:25:54,194 INFO L226 Difference]: Without dead ends: 166 [2021-03-10 21:25:54,194 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:25:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-03-10 21:25:54,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 99. [2021-03-10 21:25:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2021-03-10 21:25:54,198 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2021-03-10 21:25:54,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:54,198 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2021-03-10 21:25:54,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:54,199 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2021-03-10 21:25:54,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:54,199 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:54,199 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:54,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-03-10 21:25:54,407 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:54,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1473313992, now seen corresponding path program 13 times [2021-03-10 21:25:54,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:54,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768784383] [2021-03-10 21:25:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:54,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:54,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:54,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768784383] [2021-03-10 21:25:54,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411191189] [2021-03-10 21:25:54,457 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 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 [2021-03-10 21:25:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:54,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:54,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:54,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:54,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:54,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:25:54,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400769056] [2021-03-10 21:25:54,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:25:54,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:54,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:25:54,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:25:54,516 INFO L87 Difference]: Start difference. First operand 99 states and 265 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:54,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:54,568 INFO L93 Difference]: Finished difference Result 169 states and 365 transitions. [2021-03-10 21:25:54,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:25:54,569 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:25:54,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:54,570 INFO L225 Difference]: With dead ends: 169 [2021-03-10 21:25:54,570 INFO L226 Difference]: Without dead ends: 169 [2021-03-10 21:25:54,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 49.7ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:25:54,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-03-10 21:25:54,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 104. [2021-03-10 21:25:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.70873786407767) internal successors, (279), 103 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:54,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 279 transitions. [2021-03-10 21:25:54,574 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 279 transitions. Word has length 15 [2021-03-10 21:25:54,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:54,574 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 279 transitions. [2021-03-10 21:25:54,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 279 transitions. [2021-03-10 21:25:54,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:54,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:54,575 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:54,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:54,796 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:54,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:54,797 INFO L82 PathProgramCache]: Analyzing trace with hash -390023859, now seen corresponding path program 14 times [2021-03-10 21:25:54,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:54,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529731996] [2021-03-10 21:25:54,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:54,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:54,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529731996] [2021-03-10 21:25:54,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631822] [2021-03-10 21:25:54,841 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 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 [2021-03-10 21:25:54,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:54,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:54,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:54,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:54,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:54,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:25:54,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907784602] [2021-03-10 21:25:54,900 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:25:54,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:54,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:25:54,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:25:54,900 INFO L87 Difference]: Start difference. First operand 104 states and 279 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:54,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:54,987 INFO L93 Difference]: Finished difference Result 177 states and 389 transitions. [2021-03-10 21:25:54,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:25:54,988 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:25:54,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:54,989 INFO L225 Difference]: With dead ends: 177 [2021-03-10 21:25:54,989 INFO L226 Difference]: Without dead ends: 175 [2021-03-10 21:25:54,989 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-03-10 21:25:54,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 110. [2021-03-10 21:25:54,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.761467889908257) internal successors, (301), 109 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 301 transitions. [2021-03-10 21:25:54,994 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 301 transitions. Word has length 15 [2021-03-10 21:25:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:54,994 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 301 transitions. [2021-03-10 21:25:54,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 301 transitions. [2021-03-10 21:25:54,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:54,994 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:54,994 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:55,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-10 21:25:55,216 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:55,217 INFO L82 PathProgramCache]: Analyzing trace with hash 266778318, now seen corresponding path program 15 times [2021-03-10 21:25:55,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:55,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292427943] [2021-03-10 21:25:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:55,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:55,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292427943] [2021-03-10 21:25:55,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206573875] [2021-03-10 21:25:55,259 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 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 [2021-03-10 21:25:55,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:25:55,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:55,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:55,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:55,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:55,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:55,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:25:55,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320211171] [2021-03-10 21:25:55,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:25:55,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:55,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:25:55,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:25:55,318 INFO L87 Difference]: Start difference. First operand 110 states and 301 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:55,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:55,408 INFO L93 Difference]: Finished difference Result 167 states and 373 transitions. [2021-03-10 21:25:55,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:25:55,408 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:25:55,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:55,409 INFO L225 Difference]: With dead ends: 167 [2021-03-10 21:25:55,409 INFO L226 Difference]: Without dead ends: 166 [2021-03-10 21:25:55,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:55,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-03-10 21:25:55,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 110. [2021-03-10 21:25:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.7522935779816513) internal successors, (300), 109 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 300 transitions. [2021-03-10 21:25:55,414 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 300 transitions. Word has length 15 [2021-03-10 21:25:55,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:55,414 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 300 transitions. [2021-03-10 21:25:55,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:55,415 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 300 transitions. [2021-03-10 21:25:55,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:55,415 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:55,416 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:55,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:55,635 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:55,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:55,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1189197051, now seen corresponding path program 16 times [2021-03-10 21:25:55,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:55,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984752155] [2021-03-10 21:25:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:55,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:55,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984752155] [2021-03-10 21:25:55,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391088709] [2021-03-10 21:25:55,692 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 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 [2021-03-10 21:25:55,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:55,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:55,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:55,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:55,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:55,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:25:55,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830439228] [2021-03-10 21:25:55,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:25:55,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:55,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:25:55,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:25:55,778 INFO L87 Difference]: Start difference. First operand 110 states and 300 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:55,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:55,818 INFO L93 Difference]: Finished difference Result 181 states and 397 transitions. [2021-03-10 21:25:55,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:25:55,819 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:25:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:55,819 INFO L225 Difference]: With dead ends: 181 [2021-03-10 21:25:55,819 INFO L226 Difference]: Without dead ends: 181 [2021-03-10 21:25:55,820 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:25:55,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-03-10 21:25:55,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 110. [2021-03-10 21:25:55,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.7522935779816513) internal successors, (300), 109 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 300 transitions. [2021-03-10 21:25:55,824 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 300 transitions. Word has length 15 [2021-03-10 21:25:55,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:55,825 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 300 transitions. [2021-03-10 21:25:55,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:55,825 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 300 transitions. [2021-03-10 21:25:55,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:55,825 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:55,825 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:56,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-10 21:25:56,044 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:56,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:56,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1977391626, now seen corresponding path program 17 times [2021-03-10 21:25:56,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:56,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993830103] [2021-03-10 21:25:56,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:56,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993830103] [2021-03-10 21:25:56,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076396087] [2021-03-10 21:25:56,102 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 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 [2021-03-10 21:25:56,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:25:56,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:56,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:56,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:56,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:56,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:56,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:25:56,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232770301] [2021-03-10 21:25:56,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:25:56,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:56,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:25:56,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:25:56,163 INFO L87 Difference]: Start difference. First operand 110 states and 300 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:25:56,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:56,266 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2021-03-10 21:25:56,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:25:56,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-03-10 21:25:56,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:56,267 INFO L225 Difference]: With dead ends: 148 [2021-03-10 21:25:56,267 INFO L226 Difference]: Without dead ends: 146 [2021-03-10 21:25:56,267 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:56,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-03-10 21:25:56,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 111. [2021-03-10 21:25:56,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7363636363636363) internal successors, (301), 110 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:56,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 301 transitions. [2021-03-10 21:25:56,271 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 301 transitions. Word has length 15 [2021-03-10 21:25:56,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:56,271 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 301 transitions. [2021-03-10 21:25:56,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:25:56,271 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 301 transitions. [2021-03-10 21:25:56,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:56,273 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:56,273 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:56,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 21:25:56,483 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:56,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:56,483 INFO L82 PathProgramCache]: Analyzing trace with hash -539850283, now seen corresponding path program 18 times [2021-03-10 21:25:56,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:56,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643631852] [2021-03-10 21:25:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:56,521 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:56,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643631852] [2021-03-10 21:25:56,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012394900] [2021-03-10 21:25:56,521 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:56,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:25:56,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:56,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:56,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:56,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:56,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:25:56,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880729943] [2021-03-10 21:25:56,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:25:56,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:56,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:25:56,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:25:56,585 INFO L87 Difference]: Start difference. First operand 111 states and 301 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:25:56,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:56,650 INFO L93 Difference]: Finished difference Result 194 states and 419 transitions. [2021-03-10 21:25:56,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:25:56,651 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-03-10 21:25:56,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:56,651 INFO L225 Difference]: With dead ends: 194 [2021-03-10 21:25:56,652 INFO L226 Difference]: Without dead ends: 194 [2021-03-10 21:25:56,652 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:25:56,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-03-10 21:25:56,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 111. [2021-03-10 21:25:56,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7363636363636363) internal successors, (301), 110 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:56,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 301 transitions. [2021-03-10 21:25:56,656 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 301 transitions. Word has length 15 [2021-03-10 21:25:56,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:56,656 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 301 transitions. [2021-03-10 21:25:56,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:25:56,656 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 301 transitions. [2021-03-10 21:25:56,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:56,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:56,656 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:56,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:56,867 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:56,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:56,868 INFO L82 PathProgramCache]: Analyzing trace with hash 746378496, now seen corresponding path program 19 times [2021-03-10 21:25:56,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:56,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382102449] [2021-03-10 21:25:56,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:56,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382102449] [2021-03-10 21:25:56,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246650220] [2021-03-10 21:25:56,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:56,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:56,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:56,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:56,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:25:56,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944579097] [2021-03-10 21:25:56,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:25:56,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:56,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:25:56,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:25:56,980 INFO L87 Difference]: Start difference. First operand 111 states and 301 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:57,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:57,047 INFO L93 Difference]: Finished difference Result 186 states and 412 transitions. [2021-03-10 21:25:57,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:25:57,047 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:25:57,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:57,048 INFO L225 Difference]: With dead ends: 186 [2021-03-10 21:25:57,048 INFO L226 Difference]: Without dead ends: 186 [2021-03-10 21:25:57,048 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:25:57,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-03-10 21:25:57,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 116. [2021-03-10 21:25:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.756521739130435) internal successors, (317), 115 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 317 transitions. [2021-03-10 21:25:57,054 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 317 transitions. Word has length 15 [2021-03-10 21:25:57,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:57,054 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 317 transitions. [2021-03-10 21:25:57,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:57,055 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 317 transitions. [2021-03-10 21:25:57,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:57,055 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:57,055 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:57,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-03-10 21:25:57,277 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:57,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:57,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1829668629, now seen corresponding path program 20 times [2021-03-10 21:25:57,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:57,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464792799] [2021-03-10 21:25:57,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:57,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464792799] [2021-03-10 21:25:57,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665630964] [2021-03-10 21:25:57,322 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:25:57,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:57,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:57,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:57,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:57,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:57,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:25:57,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663839629] [2021-03-10 21:25:57,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:25:57,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:57,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:25:57,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:25:57,385 INFO L87 Difference]: Start difference. First operand 116 states and 317 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:57,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:57,471 INFO L93 Difference]: Finished difference Result 190 states and 428 transitions. [2021-03-10 21:25:57,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:25:57,472 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:25:57,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:57,473 INFO L225 Difference]: With dead ends: 190 [2021-03-10 21:25:57,473 INFO L226 Difference]: Without dead ends: 188 [2021-03-10 21:25:57,474 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:57,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-03-10 21:25:57,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 124. [2021-03-10 21:25:57,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.8048780487804876) internal successors, (345), 123 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 345 transitions. [2021-03-10 21:25:57,478 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 345 transitions. Word has length 15 [2021-03-10 21:25:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:57,478 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 345 transitions. [2021-03-10 21:25:57,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 345 transitions. [2021-03-10 21:25:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:57,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:57,479 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:57,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:57,700 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:57,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:57,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1808496490, now seen corresponding path program 21 times [2021-03-10 21:25:57,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:57,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820519326] [2021-03-10 21:25:57,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:57,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:57,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:57,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820519326] [2021-03-10 21:25:57,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434055323] [2021-03-10 21:25:57,742 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:25:57,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:25:57,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:57,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:57,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:57,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:57,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:25:57,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370259704] [2021-03-10 21:25:57,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:25:57,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:57,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:25:57,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:25:57,797 INFO L87 Difference]: Start difference. First operand 124 states and 345 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:57,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:57,878 INFO L93 Difference]: Finished difference Result 188 states and 429 transitions. [2021-03-10 21:25:57,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:25:57,878 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:25:57,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:57,879 INFO L225 Difference]: With dead ends: 188 [2021-03-10 21:25:57,879 INFO L226 Difference]: Without dead ends: 187 [2021-03-10 21:25:57,879 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:57,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-03-10 21:25:57,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 124. [2021-03-10 21:25:57,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.796747967479675) internal successors, (344), 123 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 344 transitions. [2021-03-10 21:25:57,883 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 344 transitions. Word has length 15 [2021-03-10 21:25:57,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:57,883 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 344 transitions. [2021-03-10 21:25:57,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:57,883 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 344 transitions. [2021-03-10 21:25:57,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:57,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:57,884 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:58,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:58,095 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:58,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:58,096 INFO L82 PathProgramCache]: Analyzing trace with hash -886077757, now seen corresponding path program 22 times [2021-03-10 21:25:58,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:58,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381499266] [2021-03-10 21:25:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:58,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381499266] [2021-03-10 21:25:58,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285201023] [2021-03-10 21:25:58,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:58,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:58,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:58,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:58,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:58,189 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:58,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:58,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:25:58,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184451919] [2021-03-10 21:25:58,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:25:58,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:58,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:25:58,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:25:58,191 INFO L87 Difference]: Start difference. First operand 124 states and 344 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:58,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:58,230 INFO L93 Difference]: Finished difference Result 191 states and 431 transitions. [2021-03-10 21:25:58,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:25:58,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:25:58,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:58,231 INFO L225 Difference]: With dead ends: 191 [2021-03-10 21:25:58,231 INFO L226 Difference]: Without dead ends: 191 [2021-03-10 21:25:58,231 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:25:58,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-03-10 21:25:58,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 124. [2021-03-10 21:25:58,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.796747967479675) internal successors, (344), 123 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 344 transitions. [2021-03-10 21:25:58,241 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 344 transitions. Word has length 15 [2021-03-10 21:25:58,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:58,241 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 344 transitions. [2021-03-10 21:25:58,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:58,242 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 344 transitions. [2021-03-10 21:25:58,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:58,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:58,242 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:58,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-03-10 21:25:58,455 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:58,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:58,455 INFO L82 PathProgramCache]: Analyzing trace with hash -97883182, now seen corresponding path program 23 times [2021-03-10 21:25:58,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:58,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724383998] [2021-03-10 21:25:58,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:58,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724383998] [2021-03-10 21:25:58,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561134924] [2021-03-10 21:25:58,500 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:25:58,547 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:25:58,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:58,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:58,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:58,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:58,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:25:58,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579867974] [2021-03-10 21:25:58,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:25:58,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:58,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:25:58,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:25:58,589 INFO L87 Difference]: Start difference. First operand 124 states and 344 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:25:58,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:58,697 INFO L93 Difference]: Finished difference Result 193 states and 435 transitions. [2021-03-10 21:25:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:25:58,698 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-03-10 21:25:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:58,699 INFO L225 Difference]: With dead ends: 193 [2021-03-10 21:25:58,699 INFO L226 Difference]: Without dead ends: 191 [2021-03-10 21:25:58,699 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-03-10 21:25:58,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 124. [2021-03-10 21:25:58,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7886178861788617) internal successors, (343), 123 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:58,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 343 transitions. [2021-03-10 21:25:58,703 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 343 transitions. Word has length 15 [2021-03-10 21:25:58,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:58,703 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 343 transitions. [2021-03-10 21:25:58,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:25:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 343 transitions. [2021-03-10 21:25:58,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:58,704 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:58,704 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:58,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:58,922 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:58,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:58,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1679842205, now seen corresponding path program 24 times [2021-03-10 21:25:58,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:58,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750700597] [2021-03-10 21:25:58,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:58,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750700597] [2021-03-10 21:25:58,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464201882] [2021-03-10 21:25:58,965 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:58,987 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:25:58,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:58,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:58,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:59,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:59,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:25:59,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080506080] [2021-03-10 21:25:59,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:25:59,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:59,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:25:59,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:25:59,034 INFO L87 Difference]: Start difference. First operand 124 states and 343 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:25:59,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:59,102 INFO L93 Difference]: Finished difference Result 200 states and 445 transitions. [2021-03-10 21:25:59,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:25:59,103 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-03-10 21:25:59,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:59,104 INFO L225 Difference]: With dead ends: 200 [2021-03-10 21:25:59,104 INFO L226 Difference]: Without dead ends: 200 [2021-03-10 21:25:59,104 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:25:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-03-10 21:25:59,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 124. [2021-03-10 21:25:59,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7886178861788617) internal successors, (343), 123 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:59,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 343 transitions. [2021-03-10 21:25:59,108 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 343 transitions. Word has length 15 [2021-03-10 21:25:59,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:59,108 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 343 transitions. [2021-03-10 21:25:59,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:25:59,109 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 343 transitions. [2021-03-10 21:25:59,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:59,109 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:59,109 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:59,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-03-10 21:25:59,330 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:59,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:59,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1391521814, now seen corresponding path program 25 times [2021-03-10 21:25:59,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:59,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537412619] [2021-03-10 21:25:59,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:59,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:59,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537412619] [2021-03-10 21:25:59,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504846855] [2021-03-10 21:25:59,371 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:25:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:59,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:59,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:59,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:59,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:25:59,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97287119] [2021-03-10 21:25:59,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:25:59,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:59,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:25:59,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:25:59,427 INFO L87 Difference]: Start difference. First operand 124 states and 343 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:25:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:59,495 INFO L93 Difference]: Finished difference Result 157 states and 418 transitions. [2021-03-10 21:25:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:25:59,496 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-03-10 21:25:59,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:59,496 INFO L225 Difference]: With dead ends: 157 [2021-03-10 21:25:59,497 INFO L226 Difference]: Without dead ends: 154 [2021-03-10 21:25:59,498 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:59,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-03-10 21:25:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2021-03-10 21:25:59,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7804878048780486) internal successors, (342), 123 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 342 transitions. [2021-03-10 21:25:59,501 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 342 transitions. Word has length 15 [2021-03-10 21:25:59,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:59,502 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 342 transitions. [2021-03-10 21:25:59,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:25:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 342 transitions. [2021-03-10 21:25:59,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:59,502 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:59,502 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:59,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-03-10 21:25:59,717 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:59,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:59,717 INFO L82 PathProgramCache]: Analyzing trace with hash -381017597, now seen corresponding path program 26 times [2021-03-10 21:25:59,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:59,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091698317] [2021-03-10 21:25:59,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:59,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091698317] [2021-03-10 21:25:59,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451357649] [2021-03-10 21:25:59,752 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:59,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:59,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:59,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:25:59,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:59,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:59,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:25:59,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567719323] [2021-03-10 21:25:59,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:25:59,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:59,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:25:59,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:25:59,818 INFO L87 Difference]: Start difference. First operand 124 states and 342 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:25:59,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:59,918 INFO L93 Difference]: Finished difference Result 208 states and 481 transitions. [2021-03-10 21:25:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:25:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-03-10 21:25:59,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:59,919 INFO L225 Difference]: With dead ends: 208 [2021-03-10 21:25:59,919 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 21:25:59,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:59,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 21:25:59,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 134. [2021-03-10 21:25:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.827067669172932) internal successors, (376), 133 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 376 transitions. [2021-03-10 21:25:59,923 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 376 transitions. Word has length 15 [2021-03-10 21:25:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:59,924 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 376 transitions. [2021-03-10 21:25:59,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:25:59,924 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 376 transitions. [2021-03-10 21:25:59,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:25:59,924 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:59,924 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:00,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-03-10 21:26:00,138 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:00,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:00,138 INFO L82 PathProgramCache]: Analyzing trace with hash 837368888, now seen corresponding path program 27 times [2021-03-10 21:26:00,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:00,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152647930] [2021-03-10 21:26:00,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:00,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:00,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:00,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152647930] [2021-03-10 21:26:00,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961712548] [2021-03-10 21:26:00,177 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:00,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:26:00,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:00,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:00,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:00,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:00,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:00,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:26:00,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152463214] [2021-03-10 21:26:00,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:26:00,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:00,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:26:00,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:26:00,228 INFO L87 Difference]: Start difference. First operand 134 states and 376 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:00,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:00,267 INFO L93 Difference]: Finished difference Result 216 states and 502 transitions. [2021-03-10 21:26:00,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:26:00,268 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:26:00,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:00,268 INFO L225 Difference]: With dead ends: 216 [2021-03-10 21:26:00,269 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 21:26:00,269 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:00,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 21:26:00,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 139. [2021-03-10 21:26:00,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8550724637681157) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:00,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 394 transitions. [2021-03-10 21:26:00,273 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 394 transitions. Word has length 15 [2021-03-10 21:26:00,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:00,273 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 394 transitions. [2021-03-10 21:26:00,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:00,273 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 394 transitions. [2021-03-10 21:26:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:00,273 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:00,273 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:00,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-10 21:26:00,487 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:00,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:00,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1920659021, now seen corresponding path program 28 times [2021-03-10 21:26:00,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:00,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557686692] [2021-03-10 21:26:00,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:00,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557686692] [2021-03-10 21:26:00,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318093237] [2021-03-10 21:26:00,520 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:00,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:00,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:00,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:00,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:00,571 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:00,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:00,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:26:00,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444250281] [2021-03-10 21:26:00,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:26:00,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:00,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:26:00,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:26:00,573 INFO L87 Difference]: Start difference. First operand 139 states and 394 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:00,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:00,664 INFO L93 Difference]: Finished difference Result 221 states and 533 transitions. [2021-03-10 21:26:00,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:26:00,664 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:26:00,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:00,665 INFO L225 Difference]: With dead ends: 221 [2021-03-10 21:26:00,665 INFO L226 Difference]: Without dead ends: 219 [2021-03-10 21:26:00,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:00,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-03-10 21:26:00,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 157. [2021-03-10 21:26:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.9166666666666665) internal successors, (455), 156 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:00,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 455 transitions. [2021-03-10 21:26:00,670 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 455 transitions. Word has length 15 [2021-03-10 21:26:00,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:00,670 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 455 transitions. [2021-03-10 21:26:00,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:00,670 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 455 transitions. [2021-03-10 21:26:00,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:00,671 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:00,671 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:00,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:00,887 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:00,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:00,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1717506098, now seen corresponding path program 29 times [2021-03-10 21:26:00,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:00,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412994801] [2021-03-10 21:26:00,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:00,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:00,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412994801] [2021-03-10 21:26:00,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502163274] [2021-03-10 21:26:00,930 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:00,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:26:00,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:00,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:00,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:00,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:00,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:26:00,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960588886] [2021-03-10 21:26:00,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:26:00,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:00,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:26:00,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:26:00,988 INFO L87 Difference]: Start difference. First operand 157 states and 455 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:01,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:01,075 INFO L93 Difference]: Finished difference Result 232 states and 558 transitions. [2021-03-10 21:26:01,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:26:01,076 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:26:01,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:01,077 INFO L225 Difference]: With dead ends: 232 [2021-03-10 21:26:01,077 INFO L226 Difference]: Without dead ends: 231 [2021-03-10 21:26:01,078 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:01,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-03-10 21:26:01,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 157. [2021-03-10 21:26:01,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.9038461538461537) internal successors, (453), 156 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:01,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 453 transitions. [2021-03-10 21:26:01,084 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 453 transitions. Word has length 15 [2021-03-10 21:26:01,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:01,084 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 453 transitions. [2021-03-10 21:26:01,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:01,084 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 453 transitions. [2021-03-10 21:26:01,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:01,085 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:01,085 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:01,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:01,308 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:01,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:01,308 INFO L82 PathProgramCache]: Analyzing trace with hash -795087365, now seen corresponding path program 30 times [2021-03-10 21:26:01,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:01,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118304157] [2021-03-10 21:26:01,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:01,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118304157] [2021-03-10 21:26:01,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760189463] [2021-03-10 21:26:01,345 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:01,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:26:01,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:01,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:01,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:01,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:01,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:26:01,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949043530] [2021-03-10 21:26:01,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:26:01,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:01,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:26:01,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:26:01,410 INFO L87 Difference]: Start difference. First operand 157 states and 453 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:01,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:01,449 INFO L93 Difference]: Finished difference Result 220 states and 530 transitions. [2021-03-10 21:26:01,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:26:01,450 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:26:01,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:01,451 INFO L225 Difference]: With dead ends: 220 [2021-03-10 21:26:01,451 INFO L226 Difference]: Without dead ends: 220 [2021-03-10 21:26:01,451 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:01,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-03-10 21:26:01,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 156. [2021-03-10 21:26:01,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8967741935483873) internal successors, (449), 155 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:01,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 449 transitions. [2021-03-10 21:26:01,455 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 449 transitions. Word has length 15 [2021-03-10 21:26:01,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:01,455 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 449 transitions. [2021-03-10 21:26:01,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:01,456 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 449 transitions. [2021-03-10 21:26:01,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:01,456 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:01,456 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:01,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:01,671 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:01,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:01,671 INFO L82 PathProgramCache]: Analyzing trace with hash -6892790, now seen corresponding path program 31 times [2021-03-10 21:26:01,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:01,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011265782] [2021-03-10 21:26:01,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:01,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:01,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011265782] [2021-03-10 21:26:01,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663156541] [2021-03-10 21:26:01,717 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:01,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:01,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:01,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:01,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:01,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:26:01,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413317778] [2021-03-10 21:26:01,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:26:01,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:01,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:26:01,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:01,795 INFO L87 Difference]: Start difference. First operand 156 states and 449 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:26:01,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:01,876 INFO L93 Difference]: Finished difference Result 236 states and 559 transitions. [2021-03-10 21:26:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:01,877 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-03-10 21:26:01,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:01,878 INFO L225 Difference]: With dead ends: 236 [2021-03-10 21:26:01,878 INFO L226 Difference]: Without dead ends: 234 [2021-03-10 21:26:01,879 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:01,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-03-10 21:26:01,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 156. [2021-03-10 21:26:01,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.890322580645161) internal successors, (448), 155 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:01,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 448 transitions. [2021-03-10 21:26:01,883 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 448 transitions. Word has length 15 [2021-03-10 21:26:01,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:01,883 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 448 transitions. [2021-03-10 21:26:01,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:26:01,883 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 448 transitions. [2021-03-10 21:26:01,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:01,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:01,884 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:02,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-03-10 21:26:02,095 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:02,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:02,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1770832597, now seen corresponding path program 32 times [2021-03-10 21:26:02,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:02,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155086264] [2021-03-10 21:26:02,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:02,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:02,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:02,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155086264] [2021-03-10 21:26:02,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390697383] [2021-03-10 21:26:02,129 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:02,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:02,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:02,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:02,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:02,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:02,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:26:02,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186562878] [2021-03-10 21:26:02,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:26:02,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:02,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:26:02,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:02,183 INFO L87 Difference]: Start difference. First operand 156 states and 448 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:26:02,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:02,244 INFO L93 Difference]: Finished difference Result 225 states and 538 transitions. [2021-03-10 21:26:02,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:26:02,244 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-03-10 21:26:02,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:02,245 INFO L225 Difference]: With dead ends: 225 [2021-03-10 21:26:02,245 INFO L226 Difference]: Without dead ends: 225 [2021-03-10 21:26:02,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:02,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-03-10 21:26:02,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 156. [2021-03-10 21:26:02,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.890322580645161) internal successors, (448), 155 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:02,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 448 transitions. [2021-03-10 21:26:02,249 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 448 transitions. Word has length 15 [2021-03-10 21:26:02,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:02,249 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 448 transitions. [2021-03-10 21:26:02,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:26:02,250 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 448 transitions. [2021-03-10 21:26:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:02,250 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:02,250 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:02,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:02,471 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:02,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:02,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1482512206, now seen corresponding path program 33 times [2021-03-10 21:26:02,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:02,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768071939] [2021-03-10 21:26:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:02,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:02,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:02,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768071939] [2021-03-10 21:26:02,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785974760] [2021-03-10 21:26:02,509 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:02,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:26:02,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:02,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:02,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:02,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:02,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:26:02,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941614177] [2021-03-10 21:26:02,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:26:02,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:02,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:26:02,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:02,570 INFO L87 Difference]: Start difference. First operand 156 states and 448 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:26:02,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:02,639 INFO L93 Difference]: Finished difference Result 210 states and 549 transitions. [2021-03-10 21:26:02,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:26:02,639 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-03-10 21:26:02,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:02,640 INFO L225 Difference]: With dead ends: 210 [2021-03-10 21:26:02,640 INFO L226 Difference]: Without dead ends: 207 [2021-03-10 21:26:02,640 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 71.3ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:02,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-03-10 21:26:02,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 156. [2021-03-10 21:26:02,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8838709677419354) internal successors, (447), 155 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:02,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 447 transitions. [2021-03-10 21:26:02,643 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 447 transitions. Word has length 15 [2021-03-10 21:26:02,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:02,643 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 447 transitions. [2021-03-10 21:26:02,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:26:02,643 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 447 transitions. [2021-03-10 21:26:02,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:02,644 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:02,644 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:02,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-03-10 21:26:02,865 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:02,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:02,865 INFO L82 PathProgramCache]: Analyzing trace with hash -290027205, now seen corresponding path program 34 times [2021-03-10 21:26:02,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:02,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002235903] [2021-03-10 21:26:02,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:02,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:02,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002235903] [2021-03-10 21:26:02,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740251788] [2021-03-10 21:26:02,899 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:26:02,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:02,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:02,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:02,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:02,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:02,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:26:02,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780955511] [2021-03-10 21:26:02,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:26:02,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:02,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:26:02,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:02,963 INFO L87 Difference]: Start difference. First operand 156 states and 447 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:26:03,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:03,037 INFO L93 Difference]: Finished difference Result 201 states and 501 transitions. [2021-03-10 21:26:03,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:26:03,037 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-03-10 21:26:03,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:03,038 INFO L225 Difference]: With dead ends: 201 [2021-03-10 21:26:03,038 INFO L226 Difference]: Without dead ends: 201 [2021-03-10 21:26:03,038 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:03,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-03-10 21:26:03,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2021-03-10 21:26:03,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8838709677419354) internal successors, (447), 155 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 447 transitions. [2021-03-10 21:26:03,042 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 447 transitions. Word has length 15 [2021-03-10 21:26:03,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:03,042 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 447 transitions. [2021-03-10 21:26:03,042 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:26:03,042 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 447 transitions. [2021-03-10 21:26:03,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:03,042 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:03,042 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:03,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:03,267 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:03,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:03,267 INFO L82 PathProgramCache]: Analyzing trace with hash 409426826, now seen corresponding path program 35 times [2021-03-10 21:26:03,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:03,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860144509] [2021-03-10 21:26:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:03,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:03,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860144509] [2021-03-10 21:26:03,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331550706] [2021-03-10 21:26:03,304 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:03,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:26:03,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:03,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:03,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:03,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:03,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:26:03,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096653741] [2021-03-10 21:26:03,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:26:03,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:03,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:26:03,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:03,358 INFO L87 Difference]: Start difference. First operand 156 states and 447 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:26:03,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:03,430 INFO L93 Difference]: Finished difference Result 199 states and 536 transitions. [2021-03-10 21:26:03,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:26:03,430 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-03-10 21:26:03,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:03,431 INFO L225 Difference]: With dead ends: 199 [2021-03-10 21:26:03,431 INFO L226 Difference]: Without dead ends: 195 [2021-03-10 21:26:03,431 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 70.4ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:03,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-03-10 21:26:03,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 156. [2021-03-10 21:26:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8774193548387097) internal successors, (446), 155 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 446 transitions. [2021-03-10 21:26:03,435 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 446 transitions. Word has length 15 [2021-03-10 21:26:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:03,435 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 446 transitions. [2021-03-10 21:26:03,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:26:03,435 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 446 transitions. [2021-03-10 21:26:03,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:03,435 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:03,435 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:03,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-03-10 21:26:03,651 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:03,652 INFO L82 PathProgramCache]: Analyzing trace with hash 247828373, now seen corresponding path program 36 times [2021-03-10 21:26:03,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:03,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17025014] [2021-03-10 21:26:03,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:03,691 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:03,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17025014] [2021-03-10 21:26:03,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523754012] [2021-03-10 21:26:03,691 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:26:03,717 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:26:03,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:03,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:03,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:03,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:03,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:26:03,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236678608] [2021-03-10 21:26:03,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:26:03,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:03,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:26:03,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:03,757 INFO L87 Difference]: Start difference. First operand 156 states and 446 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:26:03,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:03,877 INFO L93 Difference]: Finished difference Result 212 states and 544 transitions. [2021-03-10 21:26:03,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:26:03,878 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-03-10 21:26:03,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:03,878 INFO L225 Difference]: With dead ends: 212 [2021-03-10 21:26:03,878 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 21:26:03,879 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:26:03,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 21:26:03,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 162. [2021-03-10 21:26:03,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.888198757763975) internal successors, (465), 161 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:03,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 465 transitions. [2021-03-10 21:26:03,883 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 465 transitions. Word has length 15 [2021-03-10 21:26:03,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:03,883 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 465 transitions. [2021-03-10 21:26:03,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-03-10 21:26:03,883 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 465 transitions. [2021-03-10 21:26:03,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:03,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:03,884 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:04,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-03-10 21:26:04,095 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:04,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:04,095 INFO L82 PathProgramCache]: Analyzing trace with hash -636896256, now seen corresponding path program 37 times [2021-03-10 21:26:04,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:04,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257817975] [2021-03-10 21:26:04,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:04,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257817975] [2021-03-10 21:26:04,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804704125] [2021-03-10 21:26:04,131 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:04,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:04,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:04,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:04,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:26:04,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220869794] [2021-03-10 21:26:04,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:26:04,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:04,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:26:04,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:26:04,190 INFO L87 Difference]: Start difference. First operand 162 states and 465 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-03-10 21:26:04,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:04,234 INFO L93 Difference]: Finished difference Result 260 states and 622 transitions. [2021-03-10 21:26:04,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:26:04,234 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 15 [2021-03-10 21:26:04,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:04,235 INFO L225 Difference]: With dead ends: 260 [2021-03-10 21:26:04,235 INFO L226 Difference]: Without dead ends: 260 [2021-03-10 21:26:04,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:04,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-03-10 21:26:04,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 168. [2021-03-10 21:26:04,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.9221556886227544) internal successors, (488), 167 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:04,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 488 transitions. [2021-03-10 21:26:04,240 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 488 transitions. Word has length 15 [2021-03-10 21:26:04,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:04,240 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 488 transitions. [2021-03-10 21:26:04,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-03-10 21:26:04,240 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 488 transitions. [2021-03-10 21:26:04,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:04,240 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:04,241 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:04,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-03-10 21:26:04,462 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:04,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:04,462 INFO L82 PathProgramCache]: Analyzing trace with hash 446393877, now seen corresponding path program 38 times [2021-03-10 21:26:04,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:04,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296505755] [2021-03-10 21:26:04,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:04,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:04,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:04,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296505755] [2021-03-10 21:26:04,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479939236] [2021-03-10 21:26:04,499 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:04,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:04,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:04,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:04,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:04,548 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:04,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:04,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:26:04,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853741780] [2021-03-10 21:26:04,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:26:04,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:04,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:26:04,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:26:04,549 INFO L87 Difference]: Start difference. First operand 168 states and 488 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-03-10 21:26:04,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:04,636 INFO L93 Difference]: Finished difference Result 258 states and 649 transitions. [2021-03-10 21:26:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:26:04,636 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 15 [2021-03-10 21:26:04,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:04,637 INFO L225 Difference]: With dead ends: 258 [2021-03-10 21:26:04,637 INFO L226 Difference]: Without dead ends: 256 [2021-03-10 21:26:04,637 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 53.9ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-03-10 21:26:04,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 195. [2021-03-10 21:26:04,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9742268041237114) internal successors, (577), 194 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:04,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 577 transitions. [2021-03-10 21:26:04,642 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 577 transitions. Word has length 15 [2021-03-10 21:26:04,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:04,642 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 577 transitions. [2021-03-10 21:26:04,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-03-10 21:26:04,642 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 577 transitions. [2021-03-10 21:26:04,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:04,643 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:04,643 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:04,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:04,855 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:04,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:04,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1103196054, now seen corresponding path program 39 times [2021-03-10 21:26:04,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:04,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460529732] [2021-03-10 21:26:04,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:04,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:04,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460529732] [2021-03-10 21:26:04,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48158305] [2021-03-10 21:26:04,892 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:04,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:26:04,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:04,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:04,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:04,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:04,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:04,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:26:04,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719554788] [2021-03-10 21:26:04,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:26:04,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:04,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:26:04,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:26:04,939 INFO L87 Difference]: Start difference. First operand 195 states and 577 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-03-10 21:26:05,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:05,013 INFO L93 Difference]: Finished difference Result 275 states and 689 transitions. [2021-03-10 21:26:05,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:26:05,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 15 [2021-03-10 21:26:05,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:05,015 INFO L225 Difference]: With dead ends: 275 [2021-03-10 21:26:05,015 INFO L226 Difference]: Without dead ends: 274 [2021-03-10 21:26:05,015 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:05,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-03-10 21:26:05,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 195. [2021-03-10 21:26:05,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9690721649484537) internal successors, (576), 194 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 576 transitions. [2021-03-10 21:26:05,019 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 576 transitions. Word has length 15 [2021-03-10 21:26:05,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:05,020 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 576 transitions. [2021-03-10 21:26:05,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-03-10 21:26:05,020 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 576 transitions. [2021-03-10 21:26:05,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:05,020 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:05,020 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:05,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:05,235 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:05,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:05,236 INFO L82 PathProgramCache]: Analyzing trace with hash 2025614787, now seen corresponding path program 40 times [2021-03-10 21:26:05,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:05,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698294946] [2021-03-10 21:26:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:05,272 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:05,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698294946] [2021-03-10 21:26:05,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484525518] [2021-03-10 21:26:05,272 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:05,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:05,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:05,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:05,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:05,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:05,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:26:05,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640903542] [2021-03-10 21:26:05,332 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:26:05,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:05,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:26:05,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:26:05,333 INFO L87 Difference]: Start difference. First operand 195 states and 576 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-03-10 21:26:05,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:05,366 INFO L93 Difference]: Finished difference Result 245 states and 630 transitions. [2021-03-10 21:26:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:26:05,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 15 [2021-03-10 21:26:05,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:05,367 INFO L225 Difference]: With dead ends: 245 [2021-03-10 21:26:05,368 INFO L226 Difference]: Without dead ends: 245 [2021-03-10 21:26:05,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:05,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-03-10 21:26:05,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 194. [2021-03-10 21:26:05,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9533678756476682) internal successors, (570), 193 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 570 transitions. [2021-03-10 21:26:05,372 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 570 transitions. Word has length 15 [2021-03-10 21:26:05,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:05,372 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 570 transitions. [2021-03-10 21:26:05,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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) [2021-03-10 21:26:05,372 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 570 transitions. [2021-03-10 21:26:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:05,372 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:05,372 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:05,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:05,592 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:05,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:05,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1481157934, now seen corresponding path program 41 times [2021-03-10 21:26:05,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:05,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902019383] [2021-03-10 21:26:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:05,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:05,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902019383] [2021-03-10 21:26:05,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166465014] [2021-03-10 21:26:05,624 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:05,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:26:05,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:05,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:05,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:05,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:05,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:26:05,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126626023] [2021-03-10 21:26:05,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:26:05,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:05,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:26:05,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:05,673 INFO L87 Difference]: Start difference. First operand 194 states and 570 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-03-10 21:26:05,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:05,758 INFO L93 Difference]: Finished difference Result 279 states and 689 transitions. [2021-03-10 21:26:05,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:05,759 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 15 [2021-03-10 21:26:05,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:05,759 INFO L225 Difference]: With dead ends: 279 [2021-03-10 21:26:05,759 INFO L226 Difference]: Without dead ends: 277 [2021-03-10 21:26:05,760 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:05,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-03-10 21:26:05,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 194. [2021-03-10 21:26:05,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.948186528497409) internal successors, (569), 193 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:05,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 569 transitions. [2021-03-10 21:26:05,764 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 569 transitions. Word has length 15 [2021-03-10 21:26:05,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:05,764 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 569 transitions. [2021-03-10 21:26:05,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-03-10 21:26:05,764 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 569 transitions. [2021-03-10 21:26:05,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:05,764 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:05,765 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:05,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:05,979 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:05,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:05,979 INFO L82 PathProgramCache]: Analyzing trace with hash 296567453, now seen corresponding path program 42 times [2021-03-10 21:26:05,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:05,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947351155] [2021-03-10 21:26:05,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:05,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:06,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947351155] [2021-03-10 21:26:06,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544495116] [2021-03-10 21:26:06,020 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:06,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:26:06,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:06,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:06,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:06,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:06,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:26:06,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600266292] [2021-03-10 21:26:06,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:26:06,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:06,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:26:06,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:06,074 INFO L87 Difference]: Start difference. First operand 194 states and 569 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-03-10 21:26:06,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:06,135 INFO L93 Difference]: Finished difference Result 248 states and 633 transitions. [2021-03-10 21:26:06,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:26:06,136 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 15 [2021-03-10 21:26:06,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:06,136 INFO L225 Difference]: With dead ends: 248 [2021-03-10 21:26:06,136 INFO L226 Difference]: Without dead ends: 248 [2021-03-10 21:26:06,137 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:06,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-03-10 21:26:06,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 192. [2021-03-10 21:26:06,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9424083769633507) internal successors, (562), 191 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:06,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 562 transitions. [2021-03-10 21:26:06,140 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 562 transitions. Word has length 15 [2021-03-10 21:26:06,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:06,141 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 562 transitions. [2021-03-10 21:26:06,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-03-10 21:26:06,141 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 562 transitions. [2021-03-10 21:26:06,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:06,141 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:06,141 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:06,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:06,363 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:06,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:06,363 INFO L82 PathProgramCache]: Analyzing trace with hash 8247062, now seen corresponding path program 43 times [2021-03-10 21:26:06,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:06,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041246464] [2021-03-10 21:26:06,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:06,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041246464] [2021-03-10 21:26:06,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25211231] [2021-03-10 21:26:06,398 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:26:06,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:06,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:06,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:06,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:06,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:06,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:26:06,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947054203] [2021-03-10 21:26:06,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:26:06,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:06,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:26:06,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:06,457 INFO L87 Difference]: Start difference. First operand 192 states and 562 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-03-10 21:26:06,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:06,542 INFO L93 Difference]: Finished difference Result 252 states and 674 transitions. [2021-03-10 21:26:06,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:26:06,543 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 15 [2021-03-10 21:26:06,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:06,544 INFO L225 Difference]: With dead ends: 252 [2021-03-10 21:26:06,544 INFO L226 Difference]: Without dead ends: 249 [2021-03-10 21:26:06,544 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:06,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-10 21:26:06,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 192. [2021-03-10 21:26:06,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.93717277486911) internal successors, (561), 191 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:06,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 561 transitions. [2021-03-10 21:26:06,548 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 561 transitions. Word has length 15 [2021-03-10 21:26:06,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:06,548 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 561 transitions. [2021-03-10 21:26:06,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-03-10 21:26:06,548 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 561 transitions. [2021-03-10 21:26:06,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:06,548 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:06,549 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:06,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-03-10 21:26:06,763 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:06,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:06,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1764292349, now seen corresponding path program 44 times [2021-03-10 21:26:06,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:06,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467634690] [2021-03-10 21:26:06,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:06,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:06,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467634690] [2021-03-10 21:26:06,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611673117] [2021-03-10 21:26:06,799 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:06,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:06,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:06,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:06,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:06,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:06,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:26:06,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010203165] [2021-03-10 21:26:06,853 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:26:06,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:06,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:26:06,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:06,853 INFO L87 Difference]: Start difference. First operand 192 states and 561 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-03-10 21:26:06,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:06,926 INFO L93 Difference]: Finished difference Result 226 states and 602 transitions. [2021-03-10 21:26:06,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:26:06,927 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 15 [2021-03-10 21:26:06,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:06,927 INFO L225 Difference]: With dead ends: 226 [2021-03-10 21:26:06,927 INFO L226 Difference]: Without dead ends: 226 [2021-03-10 21:26:06,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:06,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-03-10 21:26:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 189. [2021-03-10 21:26:06,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9308510638297873) internal successors, (551), 188 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:06,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 551 transitions. [2021-03-10 21:26:06,931 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 551 transitions. Word has length 15 [2021-03-10 21:26:06,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:06,931 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 551 transitions. [2021-03-10 21:26:06,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-03-10 21:26:06,931 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 551 transitions. [2021-03-10 21:26:06,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:06,931 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:06,932 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:07,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:07,147 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:07,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:07,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1064838318, now seen corresponding path program 45 times [2021-03-10 21:26:07,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:07,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118639452] [2021-03-10 21:26:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:07,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:07,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118639452] [2021-03-10 21:26:07,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438755988] [2021-03-10 21:26:07,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:07,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:26:07,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:07,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:07,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:07,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:07,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:26:07,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979625980] [2021-03-10 21:26:07,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:26:07,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:07,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:26:07,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:07,237 INFO L87 Difference]: Start difference. First operand 189 states and 551 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-03-10 21:26:07,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:07,312 INFO L93 Difference]: Finished difference Result 241 states and 654 transitions. [2021-03-10 21:26:07,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:26:07,312 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 15 [2021-03-10 21:26:07,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:07,313 INFO L225 Difference]: With dead ends: 241 [2021-03-10 21:26:07,313 INFO L226 Difference]: Without dead ends: 237 [2021-03-10 21:26:07,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:07,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-03-10 21:26:07,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 189. [2021-03-10 21:26:07,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.925531914893617) internal successors, (550), 188 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:07,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 550 transitions. [2021-03-10 21:26:07,317 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 550 transitions. Word has length 15 [2021-03-10 21:26:07,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:07,317 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 550 transitions. [2021-03-10 21:26:07,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-03-10 21:26:07,317 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 550 transitions. [2021-03-10 21:26:07,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:07,317 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:07,317 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:07,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-03-10 21:26:07,531 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:07,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:07,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1226436771, now seen corresponding path program 46 times [2021-03-10 21:26:07,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:07,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826303845] [2021-03-10 21:26:07,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:07,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:07,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826303845] [2021-03-10 21:26:07,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487032156] [2021-03-10 21:26:07,570 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:07,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:07,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:07,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:07,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:07,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:07,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:26:07,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701443193] [2021-03-10 21:26:07,627 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:26:07,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:07,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:26:07,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:07,627 INFO L87 Difference]: Start difference. First operand 189 states and 550 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-03-10 21:26:07,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:07,712 INFO L93 Difference]: Finished difference Result 216 states and 593 transitions. [2021-03-10 21:26:07,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:26:07,713 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 15 [2021-03-10 21:26:07,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:07,714 INFO L225 Difference]: With dead ends: 216 [2021-03-10 21:26:07,714 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 21:26:07,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:07,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 21:26:07,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 189. [2021-03-10 21:26:07,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.925531914893617) internal successors, (550), 188 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:07,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 550 transitions. [2021-03-10 21:26:07,717 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 550 transitions. Word has length 15 [2021-03-10 21:26:07,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:07,717 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 550 transitions. [2021-03-10 21:26:07,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-03-10 21:26:07,717 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 550 transitions. [2021-03-10 21:26:07,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:07,718 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:07,718 INFO L519 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:07,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:07,923 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:07,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:07,923 INFO L82 PathProgramCache]: Analyzing trace with hash 29253270, now seen corresponding path program 47 times [2021-03-10 21:26:07,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:07,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121574453] [2021-03-10 21:26:07,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:07,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121574453] [2021-03-10 21:26:07,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275239287] [2021-03-10 21:26:07,961 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:07,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:26:07,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:07,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:07,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:08,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:08,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:26:08,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764496430] [2021-03-10 21:26:08,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:26:08,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:08,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:26:08,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:08,011 INFO L87 Difference]: Start difference. First operand 189 states and 550 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-03-10 21:26:08,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:08,077 INFO L93 Difference]: Finished difference Result 234 states and 644 transitions. [2021-03-10 21:26:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:26:08,078 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 15 [2021-03-10 21:26:08,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:08,078 INFO L225 Difference]: With dead ends: 234 [2021-03-10 21:26:08,079 INFO L226 Difference]: Without dead ends: 229 [2021-03-10 21:26:08,079 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:08,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-03-10 21:26:08,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 188. [2021-03-10 21:26:08,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.93048128342246) internal successors, (548), 187 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:08,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 548 transitions. [2021-03-10 21:26:08,082 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 548 transitions. Word has length 15 [2021-03-10 21:26:08,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:08,082 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 548 transitions. [2021-03-10 21:26:08,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-03-10 21:26:08,082 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 548 transitions. [2021-03-10 21:26:08,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:26:08,083 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:08,083 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:08,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-03-10 21:26:08,291 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:08,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:08,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1732783037, now seen corresponding path program 48 times [2021-03-10 21:26:08,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:08,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123299021] [2021-03-10 21:26:08,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:08,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123299021] [2021-03-10 21:26:08,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788157909] [2021-03-10 21:26:08,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:26:08,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:26:08,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:08,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:26:08,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:08,405 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:08,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:08,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:26:08,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807973611] [2021-03-10 21:26:08,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:26:08,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:08,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:26:08,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:26:08,406 INFO L87 Difference]: Start difference. First operand 188 states and 548 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-03-10 21:26:08,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:08,509 INFO L93 Difference]: Finished difference Result 251 states and 681 transitions. [2021-03-10 21:26:08,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:26:08,509 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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 15 [2021-03-10 21:26:08,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:08,510 INFO L225 Difference]: With dead ends: 251 [2021-03-10 21:26:08,510 INFO L226 Difference]: Without dead ends: 251 [2021-03-10 21:26:08,510 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:26:08,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-03-10 21:26:08,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 196. [2021-03-10 21:26:08,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.923076923076923) internal successors, (570), 195 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 570 transitions. [2021-03-10 21:26:08,513 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 570 transitions. Word has length 15 [2021-03-10 21:26:08,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:08,513 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 570 transitions. [2021-03-10 21:26:08,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 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) [2021-03-10 21:26:08,514 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 570 transitions. [2021-03-10 21:26:08,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:26:08,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:08,514 INFO L519 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:08,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-10 21:26:08,735 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:08,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:08,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1137660823, now seen corresponding path program 49 times [2021-03-10 21:26:08,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:08,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277026613] [2021-03-10 21:26:08,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:08,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:08,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:26:08,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277026613] [2021-03-10 21:26:08,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836328408] [2021-03-10 21:26:08,800 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:26:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:08,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:08,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:26:08,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:08,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 21:26:08,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883972772] [2021-03-10 21:26:08,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:26:08,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:08,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:26:08,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:26:08,903 INFO L87 Difference]: Start difference. First operand 196 states and 570 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 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) [2021-03-10 21:26:08,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:08,961 INFO L93 Difference]: Finished difference Result 378 states and 1058 transitions. [2021-03-10 21:26:08,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:26:08,962 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 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 16 [2021-03-10 21:26:08,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:08,963 INFO L225 Difference]: With dead ends: 378 [2021-03-10 21:26:08,964 INFO L226 Difference]: Without dead ends: 378 [2021-03-10 21:26:08,964 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 83.9ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:26:08,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-03-10 21:26:08,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 234. [2021-03-10 21:26:08,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.8583690987124464) internal successors, (666), 233 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:08,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 666 transitions. [2021-03-10 21:26:08,968 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 666 transitions. Word has length 16 [2021-03-10 21:26:08,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:08,968 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 666 transitions. [2021-03-10 21:26:08,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 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) [2021-03-10 21:26:08,969 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 666 transitions. [2021-03-10 21:26:08,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:26:08,969 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:08,969 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:09,175 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-03-10 21:26:09,175 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:09,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:09,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1759521079, now seen corresponding path program 50 times [2021-03-10 21:26:09,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:09,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276086193] [2021-03-10 21:26:09,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:09,251 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:26:09,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276086193] [2021-03-10 21:26:09,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898017535] [2021-03-10 21:26:09,251 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:09,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:09,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:09,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:09,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:09,351 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:26:09,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:09,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 21:26:09,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445680621] [2021-03-10 21:26:09,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:09,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:09,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:09,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:09,352 INFO L87 Difference]: Start difference. First operand 234 states and 666 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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) [2021-03-10 21:26:09,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:09,427 INFO L93 Difference]: Finished difference Result 439 states and 1228 transitions. [2021-03-10 21:26:09,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:26:09,427 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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 17 [2021-03-10 21:26:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:09,429 INFO L225 Difference]: With dead ends: 439 [2021-03-10 21:26:09,429 INFO L226 Difference]: Without dead ends: 439 [2021-03-10 21:26:09,429 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 120.4ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:09,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-03-10 21:26:09,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 282. [2021-03-10 21:26:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.8362989323843415) internal successors, (797), 281 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 797 transitions. [2021-03-10 21:26:09,434 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 797 transitions. Word has length 17 [2021-03-10 21:26:09,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:09,434 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 797 transitions. [2021-03-10 21:26:09,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 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) [2021-03-10 21:26:09,434 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 797 transitions. [2021-03-10 21:26:09,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:26:09,435 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:09,435 INFO L519 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:09,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-10 21:26:09,651 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:09,651 INFO L82 PathProgramCache]: Analyzing trace with hash -437647465, now seen corresponding path program 51 times [2021-03-10 21:26:09,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:09,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137436937] [2021-03-10 21:26:09,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:09,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:26:09,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137436937] [2021-03-10 21:26:09,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240391181] [2021-03-10 21:26:09,739 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:09,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:26:09,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:09,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:26:09,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:26:09,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:09,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-10 21:26:09,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736432161] [2021-03-10 21:26:09,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:09,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:09,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:09,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:09,839 INFO L87 Difference]: Start difference. First operand 282 states and 797 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-03-10 21:26:09,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:09,939 INFO L93 Difference]: Finished difference Result 508 states and 1418 transitions. [2021-03-10 21:26:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:26:09,940 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 18 [2021-03-10 21:26:09,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:09,941 INFO L225 Difference]: With dead ends: 508 [2021-03-10 21:26:09,941 INFO L226 Difference]: Without dead ends: 507 [2021-03-10 21:26:09,941 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:26:09,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-03-10 21:26:09,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 340. [2021-03-10 21:26:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.8348082595870205) internal successors, (961), 339 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 961 transitions. [2021-03-10 21:26:09,947 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 961 transitions. Word has length 18 [2021-03-10 21:26:09,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:09,947 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 961 transitions. [2021-03-10 21:26:09,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-03-10 21:26:09,948 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 961 transitions. [2021-03-10 21:26:09,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:26:09,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:09,948 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:10,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-10 21:26:10,163 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:10,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:10,163 INFO L82 PathProgramCache]: Analyzing trace with hash 169604407, now seen corresponding path program 52 times [2021-03-10 21:26:10,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:10,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378424361] [2021-03-10 21:26:10,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:10,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:10,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378424361] [2021-03-10 21:26:10,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093591873] [2021-03-10 21:26:10,216 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:10,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:10,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:10,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:26:10,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:10,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:10,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:26:11,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:26:11,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:11,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:26:11,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:26:11,212 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:11,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:11,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-10 21:26:11,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581996224] [2021-03-10 21:26:11,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:26:11,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:11,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:26:11,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:11,214 INFO L87 Difference]: Start difference. First operand 340 states and 961 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:11,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:11,421 INFO L93 Difference]: Finished difference Result 489 states and 1247 transitions. [2021-03-10 21:26:11,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:26:11,422 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:26:11,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:11,423 INFO L225 Difference]: With dead ends: 489 [2021-03-10 21:26:11,423 INFO L226 Difference]: Without dead ends: 486 [2021-03-10 21:26:11,423 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:11,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-03-10 21:26:11,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 387. [2021-03-10 21:26:11,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.8626943005181347) internal successors, (1105), 386 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:11,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1105 transitions. [2021-03-10 21:26:11,430 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1105 transitions. Word has length 19 [2021-03-10 21:26:11,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:11,430 INFO L480 AbstractCegarLoop]: Abstraction has 387 states and 1105 transitions. [2021-03-10 21:26:11,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:11,430 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1105 transitions. [2021-03-10 21:26:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:26:11,430 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:11,431 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:11,647 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-03-10 21:26:11,647 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:11,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:11,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1764941355, now seen corresponding path program 53 times [2021-03-10 21:26:11,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:11,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467321448] [2021-03-10 21:26:11,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:11,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467321448] [2021-03-10 21:26:11,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947607525] [2021-03-10 21:26:11,711 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:11,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:26:11,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:11,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:26:11,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:12,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:12,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:26:13,279 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:26:13,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:13,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:26:13,281 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:26:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:13,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:13,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-10 21:26:13,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584715572] [2021-03-10 21:26:13,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:26:13,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:13,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:26:13,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:13,289 INFO L87 Difference]: Start difference. First operand 387 states and 1105 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:13,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:13,488 INFO L93 Difference]: Finished difference Result 556 states and 1456 transitions. [2021-03-10 21:26:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:26:13,489 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:26:13,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:13,490 INFO L225 Difference]: With dead ends: 556 [2021-03-10 21:26:13,491 INFO L226 Difference]: Without dead ends: 553 [2021-03-10 21:26:13,491 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 180.2ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:13,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-03-10 21:26:13,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 432. [2021-03-10 21:26:13,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.9419953596287702) internal successors, (1268), 431 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:13,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1268 transitions. [2021-03-10 21:26:13,497 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1268 transitions. Word has length 19 [2021-03-10 21:26:13,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:13,497 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 1268 transitions. [2021-03-10 21:26:13,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:13,497 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1268 transitions. [2021-03-10 21:26:13,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:26:13,498 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:13,498 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:13,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-03-10 21:26:13,707 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:13,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:13,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1606108669, now seen corresponding path program 54 times [2021-03-10 21:26:13,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:13,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123905659] [2021-03-10 21:26:13,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:13,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123905659] [2021-03-10 21:26:13,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618234521] [2021-03-10 21:26:13,766 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:26:13,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:26:13,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:13,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:26:13,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:14,080 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:26:14,080 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:14,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:26:16,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:26:16,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:16,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:26:16,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:26:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:16,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:16,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-10 21:26:16,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781221043] [2021-03-10 21:26:16,214 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:26:16,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:16,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:26:16,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:16,214 INFO L87 Difference]: Start difference. First operand 432 states and 1268 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:16,377 INFO L93 Difference]: Finished difference Result 627 states and 1702 transitions. [2021-03-10 21:26:16,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:26:16,378 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:26:16,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:16,380 INFO L225 Difference]: With dead ends: 627 [2021-03-10 21:26:16,380 INFO L226 Difference]: Without dead ends: 624 [2021-03-10 21:26:16,380 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 172.9ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-03-10 21:26:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 493. [2021-03-10 21:26:16,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.042682926829268) internal successors, (1497), 492 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1497 transitions. [2021-03-10 21:26:16,386 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1497 transitions. Word has length 19 [2021-03-10 21:26:16,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:16,387 INFO L480 AbstractCegarLoop]: Abstraction has 493 states and 1497 transitions. [2021-03-10 21:26:16,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:16,387 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1497 transitions. [2021-03-10 21:26:16,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:26:16,387 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:16,388 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:16,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-03-10 21:26:16,591 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:16,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:16,591 INFO L82 PathProgramCache]: Analyzing trace with hash -977262699, now seen corresponding path program 55 times [2021-03-10 21:26:16,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:16,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302396810] [2021-03-10 21:26:16,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:16,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:16,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302396810] [2021-03-10 21:26:16,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041355292] [2021-03-10 21:26:16,644 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:16,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:16,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:26:16,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:16,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:16,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:26:17,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:26:17,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:17,720 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:26:17,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:26:17,728 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:17,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:17,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-10 21:26:17,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519731942] [2021-03-10 21:26:17,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:26:17,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:17,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:26:17,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:17,729 INFO L87 Difference]: Start difference. First operand 493 states and 1497 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:17,945 INFO L93 Difference]: Finished difference Result 708 states and 2005 transitions. [2021-03-10 21:26:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:26:17,945 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:26:17,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:17,947 INFO L225 Difference]: With dead ends: 708 [2021-03-10 21:26:17,947 INFO L226 Difference]: Without dead ends: 705 [2021-03-10 21:26:17,947 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:17,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-03-10 21:26:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 574. [2021-03-10 21:26:17,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 3.1448516579406633) internal successors, (1802), 573 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1802 transitions. [2021-03-10 21:26:17,956 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1802 transitions. Word has length 19 [2021-03-10 21:26:17,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:17,956 INFO L480 AbstractCegarLoop]: Abstraction has 574 states and 1802 transitions. [2021-03-10 21:26:17,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:17,956 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1802 transitions. [2021-03-10 21:26:17,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:26:17,957 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:17,957 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:18,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1204 [2021-03-10 21:26:18,178 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:18,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:18,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1337093187, now seen corresponding path program 56 times [2021-03-10 21:26:18,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:18,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321391768] [2021-03-10 21:26:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:18,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:18,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321391768] [2021-03-10 21:26:18,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216073611] [2021-03-10 21:26:18,240 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:26:18,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:18,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:18,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:26:18,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:18,536 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:18,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:26:19,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:26:19,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:19,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:26:19,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:26:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:19,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:19,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-10 21:26:19,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057422432] [2021-03-10 21:26:19,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:26:19,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:19,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:26:19,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:19,203 INFO L87 Difference]: Start difference. First operand 574 states and 1802 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:19,395 INFO L93 Difference]: Finished difference Result 810 states and 2379 transitions. [2021-03-10 21:26:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:26:19,396 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:26:19,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:19,398 INFO L225 Difference]: With dead ends: 810 [2021-03-10 21:26:19,398 INFO L226 Difference]: Without dead ends: 807 [2021-03-10 21:26:19,398 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:19,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-03-10 21:26:19,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 673. [2021-03-10 21:26:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.232142857142857) internal successors, (2172), 672 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2172 transitions. [2021-03-10 21:26:19,408 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2172 transitions. Word has length 19 [2021-03-10 21:26:19,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:19,408 INFO L480 AbstractCegarLoop]: Abstraction has 673 states and 2172 transitions. [2021-03-10 21:26:19,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:19,408 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2172 transitions. [2021-03-10 21:26:19,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:26:19,410 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:19,410 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:19,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1468,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:19,623 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:19,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:19,623 INFO L82 PathProgramCache]: Analyzing trace with hash 67681621, now seen corresponding path program 57 times [2021-03-10 21:26:19,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:19,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878285290] [2021-03-10 21:26:19,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:19,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:19,681 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:19,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878285290] [2021-03-10 21:26:19,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548207034] [2021-03-10 21:26:19,681 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:19,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:26:19,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:19,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:26:19,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:19,967 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:26:19,967 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:19,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:26:20,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:26:20,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:20,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:26:20,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:26:20,886 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:20,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:20,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-10 21:26:20,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383978422] [2021-03-10 21:26:20,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:26:20,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:20,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:26:20,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:20,887 INFO L87 Difference]: Start difference. First operand 673 states and 2172 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:21,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:21,097 INFO L93 Difference]: Finished difference Result 900 states and 2698 transitions. [2021-03-10 21:26:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:26:21,098 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:26:21,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:21,101 INFO L225 Difference]: With dead ends: 900 [2021-03-10 21:26:21,101 INFO L226 Difference]: Without dead ends: 897 [2021-03-10 21:26:21,101 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:21,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-03-10 21:26:21,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 767. [2021-03-10 21:26:21,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 3.27023498694517) internal successors, (2505), 766 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:21,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2505 transitions. [2021-03-10 21:26:21,112 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2505 transitions. Word has length 19 [2021-03-10 21:26:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:21,113 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 2505 transitions. [2021-03-10 21:26:21,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:21,113 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2505 transitions. [2021-03-10 21:26:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:26:21,114 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:21,114 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:21,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1682 [2021-03-10 21:26:21,314 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:21,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:21,315 INFO L82 PathProgramCache]: Analyzing trace with hash -629371261, now seen corresponding path program 58 times [2021-03-10 21:26:21,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:21,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891412998] [2021-03-10 21:26:21,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:21,378 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:21,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891412998] [2021-03-10 21:26:21,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930408177] [2021-03-10 21:26:21,379 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:21,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:21,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:21,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:26:21,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:21,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:21,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:26:22,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:26:22,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:22,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:26:22,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:26:22,736 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:22,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:22,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-10 21:26:22,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327900684] [2021-03-10 21:26:22,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:26:22,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:22,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:26:22,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:22,737 INFO L87 Difference]: Start difference. First operand 767 states and 2505 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:22,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:22,928 INFO L93 Difference]: Finished difference Result 993 states and 3021 transitions. [2021-03-10 21:26:22,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:26:22,929 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:26:22,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:22,932 INFO L225 Difference]: With dead ends: 993 [2021-03-10 21:26:22,932 INFO L226 Difference]: Without dead ends: 990 [2021-03-10 21:26:22,932 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:22,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-03-10 21:26:22,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 859. [2021-03-10 21:26:22,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.297202797202797) internal successors, (2829), 858 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:22,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2829 transitions. [2021-03-10 21:26:22,946 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2829 transitions. Word has length 19 [2021-03-10 21:26:22,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:22,946 INFO L480 AbstractCegarLoop]: Abstraction has 859 states and 2829 transitions. [2021-03-10 21:26:22,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2829 transitions. [2021-03-10 21:26:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:26:22,947 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:22,947 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:23,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1990 [2021-03-10 21:26:23,163 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:23,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:23,164 INFO L82 PathProgramCache]: Analyzing trace with hash -763174123, now seen corresponding path program 59 times [2021-03-10 21:26:23,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:23,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254321331] [2021-03-10 21:26:23,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:23,216 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:23,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254321331] [2021-03-10 21:26:23,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709352178] [2021-03-10 21:26:23,216 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:23,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:26:23,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:23,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:26:23,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:23,500 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:26:23,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:23,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:26:24,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:26:24,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:24,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:26:24,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:26:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:24,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:24,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-10 21:26:24,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819409297] [2021-03-10 21:26:24,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:26:24,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:24,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:26:24,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:24,073 INFO L87 Difference]: Start difference. First operand 859 states and 2829 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:24,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:24,279 INFO L93 Difference]: Finished difference Result 1089 states and 3338 transitions. [2021-03-10 21:26:24,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:26:24,279 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:26:24,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:24,283 INFO L225 Difference]: With dead ends: 1089 [2021-03-10 21:26:24,283 INFO L226 Difference]: Without dead ends: 1086 [2021-03-10 21:26:24,283 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 165.0ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:24,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-03-10 21:26:24,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 952. [2021-03-10 21:26:24,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 3.3070452155625656) internal successors, (3145), 951 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:24,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 3145 transitions. [2021-03-10 21:26:24,296 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 3145 transitions. Word has length 19 [2021-03-10 21:26:24,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:24,297 INFO L480 AbstractCegarLoop]: Abstraction has 952 states and 3145 transitions. [2021-03-10 21:26:24,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:24,297 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 3145 transitions. [2021-03-10 21:26:24,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:26:24,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:24,298 INFO L519 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:24,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:24,499 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:24,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:24,499 INFO L82 PathProgramCache]: Analyzing trace with hash -616095549, now seen corresponding path program 60 times [2021-03-10 21:26:24,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:24,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129908045] [2021-03-10 21:26:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:24,557 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:24,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129908045] [2021-03-10 21:26:24,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626105205] [2021-03-10 21:26:24,558 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:24,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:26:24,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:24,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 21:26:24,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:24,826 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:26:24,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:24,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:26:26,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:26:26,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:26:26,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:26:26,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:26:26,532 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:26,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:26,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-03-10 21:26:26,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024897950] [2021-03-10 21:26:26,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:26:26,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:26,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:26:26,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:26,533 INFO L87 Difference]: Start difference. First operand 952 states and 3145 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:26,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:26,730 INFO L93 Difference]: Finished difference Result 1152 states and 3567 transitions. [2021-03-10 21:26:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:26:26,731 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:26:26,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:26,735 INFO L225 Difference]: With dead ends: 1152 [2021-03-10 21:26:26,735 INFO L226 Difference]: Without dead ends: 1149 [2021-03-10 21:26:26,735 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 166.9ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-03-10 21:26:26,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1030. [2021-03-10 21:26:26,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 3.308066083576288) internal successors, (3404), 1029 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:26,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3404 transitions. [2021-03-10 21:26:26,750 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3404 transitions. Word has length 19 [2021-03-10 21:26:26,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:26,750 INFO L480 AbstractCegarLoop]: Abstraction has 1030 states and 3404 transitions. [2021-03-10 21:26:26,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:26,750 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3404 transitions. [2021-03-10 21:26:26,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:26,752 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:26,752 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:26,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2659,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:26,954 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:26,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:26,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1814543255, now seen corresponding path program 61 times [2021-03-10 21:26:26,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:26,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336179263] [2021-03-10 21:26:26,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:27,033 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:27,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336179263] [2021-03-10 21:26:27,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472474545] [2021-03-10 21:26:27,034 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:27,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:27,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:27,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:27,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:26:27,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961513384] [2021-03-10 21:26:27,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:27,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:27,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:27,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:27,100 INFO L87 Difference]: Start difference. First operand 1030 states and 3404 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:27,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:27,242 INFO L93 Difference]: Finished difference Result 1163 states and 3561 transitions. [2021-03-10 21:26:27,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:27,242 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:26:27,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:27,245 INFO L225 Difference]: With dead ends: 1163 [2021-03-10 21:26:27,245 INFO L226 Difference]: Without dead ends: 1163 [2021-03-10 21:26:27,245 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:26:27,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-03-10 21:26:27,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1002. [2021-03-10 21:26:27,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 3.2927072927072927) internal successors, (3296), 1001 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:27,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 3296 transitions. [2021-03-10 21:26:27,260 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 3296 transitions. Word has length 20 [2021-03-10 21:26:27,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:27,260 INFO L480 AbstractCegarLoop]: Abstraction has 1002 states and 3296 transitions. [2021-03-10 21:26:27,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 3296 transitions. [2021-03-10 21:26:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:27,261 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:27,261 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:27,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3259,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:27,463 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:27,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:27,463 INFO L82 PathProgramCache]: Analyzing trace with hash 963496790, now seen corresponding path program 62 times [2021-03-10 21:26:27,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:27,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434493495] [2021-03-10 21:26:27,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:27,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434493495] [2021-03-10 21:26:27,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645406426] [2021-03-10 21:26:27,533 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:27,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:27,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:27,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:27,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:27,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:27,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:26:27,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329615846] [2021-03-10 21:26:27,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:27,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:27,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:27,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:27,590 INFO L87 Difference]: Start difference. First operand 1002 states and 3296 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:27,838 INFO L93 Difference]: Finished difference Result 1245 states and 3687 transitions. [2021-03-10 21:26:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:26:27,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:26:27,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:27,840 INFO L225 Difference]: With dead ends: 1245 [2021-03-10 21:26:27,840 INFO L226 Difference]: Without dead ends: 1238 [2021-03-10 21:26:27,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 208.0ms TimeCoverageRelationStatistics Valid=337, Invalid=655, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:26:27,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-03-10 21:26:27,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1029. [2021-03-10 21:26:27,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 3.277237354085603) internal successors, (3369), 1028 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:27,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3369 transitions. [2021-03-10 21:26:27,853 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3369 transitions. Word has length 20 [2021-03-10 21:26:27,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:27,853 INFO L480 AbstractCegarLoop]: Abstraction has 1029 states and 3369 transitions. [2021-03-10 21:26:27,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:27,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3369 transitions. [2021-03-10 21:26:27,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:27,855 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:27,855 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:28,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3260,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:28,055 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:28,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1620089803, now seen corresponding path program 63 times [2021-03-10 21:26:28,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:28,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273810784] [2021-03-10 21:26:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:28,117 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:28,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273810784] [2021-03-10 21:26:28,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081514039] [2021-03-10 21:26:28,117 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:28,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:26:28,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:28,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:28,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:28,168 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:28,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:28,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:28,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529561245] [2021-03-10 21:26:28,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:28,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:28,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:28,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:28,170 INFO L87 Difference]: Start difference. First operand 1029 states and 3369 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:28,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:28,295 INFO L93 Difference]: Finished difference Result 1068 states and 3424 transitions. [2021-03-10 21:26:28,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:26:28,295 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:28,297 INFO L225 Difference]: With dead ends: 1068 [2021-03-10 21:26:28,297 INFO L226 Difference]: Without dead ends: 1067 [2021-03-10 21:26:28,297 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 100.9ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:26:28,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-03-10 21:26:28,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1029. [2021-03-10 21:26:28,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 3.2733463035019454) internal successors, (3365), 1028 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3365 transitions. [2021-03-10 21:26:28,309 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3365 transitions. Word has length 20 [2021-03-10 21:26:28,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:28,309 INFO L480 AbstractCegarLoop]: Abstraction has 1029 states and 3365 transitions. [2021-03-10 21:26:28,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:28,309 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3365 transitions. [2021-03-10 21:26:28,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:28,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:28,311 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:28,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3261 [2021-03-10 21:26:28,511 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:28,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:28,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1752458760, now seen corresponding path program 64 times [2021-03-10 21:26:28,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:28,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538294531] [2021-03-10 21:26:28,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:28,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538294531] [2021-03-10 21:26:28,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707902638] [2021-03-10 21:26:28,581 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:28,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:28,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:28,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:28,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:28,646 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:28,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:28,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:28,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858872597] [2021-03-10 21:26:28,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:28,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:28,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:28,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:28,647 INFO L87 Difference]: Start difference. First operand 1029 states and 3365 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:28,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:28,711 INFO L93 Difference]: Finished difference Result 1274 states and 3760 transitions. [2021-03-10 21:26:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:26:28,712 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:28,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:28,714 INFO L225 Difference]: With dead ends: 1274 [2021-03-10 21:26:28,714 INFO L226 Difference]: Without dead ends: 1274 [2021-03-10 21:26:28,714 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:28,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-03-10 21:26:28,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 995. [2021-03-10 21:26:28,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 3.2575452716297786) internal successors, (3238), 994 states have internal predecessors, (3238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:28,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 3238 transitions. [2021-03-10 21:26:28,731 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 3238 transitions. Word has length 20 [2021-03-10 21:26:28,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:28,731 INFO L480 AbstractCegarLoop]: Abstraction has 995 states and 3238 transitions. [2021-03-10 21:26:28,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:28,732 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 3238 transitions. [2021-03-10 21:26:28,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:28,733 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:28,733 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:28,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3262 [2021-03-10 21:26:28,954 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:28,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:28,955 INFO L82 PathProgramCache]: Analyzing trace with hash 38830179, now seen corresponding path program 65 times [2021-03-10 21:26:28,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:28,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373661419] [2021-03-10 21:26:28,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:29,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373661419] [2021-03-10 21:26:29,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134394150] [2021-03-10 21:26:29,011 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:29,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:26:29,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:29,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:29,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:29,067 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:29,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:29,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:29,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909414717] [2021-03-10 21:26:29,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:29,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:29,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:29,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:29,068 INFO L87 Difference]: Start difference. First operand 995 states and 3238 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:29,162 INFO L93 Difference]: Finished difference Result 1213 states and 3571 transitions. [2021-03-10 21:26:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:29,163 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:29,164 INFO L225 Difference]: With dead ends: 1213 [2021-03-10 21:26:29,164 INFO L226 Difference]: Without dead ends: 1213 [2021-03-10 21:26:29,164 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:26:29,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-03-10 21:26:29,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1013. [2021-03-10 21:26:29,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.2371541501976284) internal successors, (3276), 1012 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:29,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3276 transitions. [2021-03-10 21:26:29,177 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3276 transitions. Word has length 20 [2021-03-10 21:26:29,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:29,177 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 3276 transitions. [2021-03-10 21:26:29,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:29,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3276 transitions. [2021-03-10 21:26:29,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:29,179 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:29,179 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:29,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3263 [2021-03-10 21:26:29,379 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:29,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:29,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1122120312, now seen corresponding path program 66 times [2021-03-10 21:26:29,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:29,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976356624] [2021-03-10 21:26:29,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:29,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976356624] [2021-03-10 21:26:29,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956854457] [2021-03-10 21:26:29,451 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:29,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:26:29,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:29,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:29,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:29,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:29,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:29,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234163230] [2021-03-10 21:26:29,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:29,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:29,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:29,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:29,514 INFO L87 Difference]: Start difference. First operand 1013 states and 3276 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:29,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:29,646 INFO L93 Difference]: Finished difference Result 1229 states and 3602 transitions. [2021-03-10 21:26:29,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:26:29,647 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:29,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:29,648 INFO L225 Difference]: With dead ends: 1229 [2021-03-10 21:26:29,648 INFO L226 Difference]: Without dead ends: 1227 [2021-03-10 21:26:29,649 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:26:29,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-03-10 21:26:29,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1023. [2021-03-10 21:26:29,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 3.238747553816047) internal successors, (3310), 1022 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:29,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3310 transitions. [2021-03-10 21:26:29,665 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3310 transitions. Word has length 20 [2021-03-10 21:26:29,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:29,665 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 3310 transitions. [2021-03-10 21:26:29,665 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:29,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3310 transitions. [2021-03-10 21:26:29,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:29,666 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:29,667 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:29,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3264 [2021-03-10 21:26:29,867 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:29,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:29,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1778922489, now seen corresponding path program 67 times [2021-03-10 21:26:29,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:29,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004878269] [2021-03-10 21:26:29,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:29,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004878269] [2021-03-10 21:26:29,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194542102] [2021-03-10 21:26:29,924 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:29,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:29,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:29,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:29,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:29,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515329466] [2021-03-10 21:26:29,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:29,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:29,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:29,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:29,976 INFO L87 Difference]: Start difference. First operand 1023 states and 3310 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:30,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:30,122 INFO L93 Difference]: Finished difference Result 1156 states and 3491 transitions. [2021-03-10 21:26:30,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:26:30,122 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:30,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:30,124 INFO L225 Difference]: With dead ends: 1156 [2021-03-10 21:26:30,124 INFO L226 Difference]: Without dead ends: 1154 [2021-03-10 21:26:30,124 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:26:30,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-03-10 21:26:30,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 998. [2021-03-10 21:26:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 3.2367101303911734) internal successors, (3227), 997 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 3227 transitions. [2021-03-10 21:26:30,135 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 3227 transitions. Word has length 20 [2021-03-10 21:26:30,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:30,135 INFO L480 AbstractCegarLoop]: Abstraction has 998 states and 3227 transitions. [2021-03-10 21:26:30,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:30,135 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 3227 transitions. [2021-03-10 21:26:30,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:30,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:30,137 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:30,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3265 [2021-03-10 21:26:30,337 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:30,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:30,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1593626074, now seen corresponding path program 68 times [2021-03-10 21:26:30,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:30,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996681982] [2021-03-10 21:26:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:30,401 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:30,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996681982] [2021-03-10 21:26:30,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981419606] [2021-03-10 21:26:30,402 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:30,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:30,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:30,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:30,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:30,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:30,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:30,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390281270] [2021-03-10 21:26:30,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:30,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:30,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:30,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:30,471 INFO L87 Difference]: Start difference. First operand 998 states and 3227 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:30,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:30,529 INFO L93 Difference]: Finished difference Result 1269 states and 3667 transitions. [2021-03-10 21:26:30,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:26:30,529 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:30,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:30,532 INFO L225 Difference]: With dead ends: 1269 [2021-03-10 21:26:30,532 INFO L226 Difference]: Without dead ends: 1269 [2021-03-10 21:26:30,533 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:30,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-03-10 21:26:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1001. [2021-03-10 21:26:30,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.236) internal successors, (3236), 1000 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3236 transitions. [2021-03-10 21:26:30,550 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3236 transitions. Word has length 20 [2021-03-10 21:26:30,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:30,550 INFO L480 AbstractCegarLoop]: Abstraction has 1001 states and 3236 transitions. [2021-03-10 21:26:30,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3236 transitions. [2021-03-10 21:26:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:30,552 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:30,552 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:30,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3266,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:30,773 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:30,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:30,773 INFO L82 PathProgramCache]: Analyzing trace with hash -805431499, now seen corresponding path program 69 times [2021-03-10 21:26:30,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:30,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037047006] [2021-03-10 21:26:30,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:30,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:30,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037047006] [2021-03-10 21:26:30,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807616325] [2021-03-10 21:26:30,840 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:30,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:26:30,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:30,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:30,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:30,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:30,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:26:30,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86009791] [2021-03-10 21:26:30,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:30,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:30,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:30,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:30,897 INFO L87 Difference]: Start difference. First operand 1001 states and 3236 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:31,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:31,039 INFO L93 Difference]: Finished difference Result 1102 states and 3382 transitions. [2021-03-10 21:26:31,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:26:31,039 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:31,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:31,041 INFO L225 Difference]: With dead ends: 1102 [2021-03-10 21:26:31,041 INFO L226 Difference]: Without dead ends: 1100 [2021-03-10 21:26:31,041 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:31,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-03-10 21:26:31,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1001. [2021-03-10 21:26:31,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.232) internal successors, (3232), 1000 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:31,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3232 transitions. [2021-03-10 21:26:31,052 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3232 transitions. Word has length 20 [2021-03-10 21:26:31,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:31,052 INFO L480 AbstractCegarLoop]: Abstraction has 1001 states and 3232 transitions. [2021-03-10 21:26:31,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:31,052 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3232 transitions. [2021-03-10 21:26:31,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:31,054 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:31,054 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:31,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3267,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:31,254 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:31,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:31,254 INFO L82 PathProgramCache]: Analyzing trace with hash 972293888, now seen corresponding path program 70 times [2021-03-10 21:26:31,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:31,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862141979] [2021-03-10 21:26:31,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:31,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862141979] [2021-03-10 21:26:31,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393800073] [2021-03-10 21:26:31,316 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:31,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:31,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:31,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:31,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:31,376 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:31,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:31,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:26:31,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038772442] [2021-03-10 21:26:31,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:31,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:31,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:31,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:31,377 INFO L87 Difference]: Start difference. First operand 1001 states and 3232 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:31,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:31,449 INFO L93 Difference]: Finished difference Result 1353 states and 3864 transitions. [2021-03-10 21:26:31,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:31,449 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:31,457 INFO L225 Difference]: With dead ends: 1353 [2021-03-10 21:26:31,457 INFO L226 Difference]: Without dead ends: 1353 [2021-03-10 21:26:31,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:31,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-03-10 21:26:31,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 965. [2021-03-10 21:26:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 3.2147302904564317) internal successors, (3099), 964 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:31,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3099 transitions. [2021-03-10 21:26:31,474 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3099 transitions. Word has length 20 [2021-03-10 21:26:31,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:31,475 INFO L480 AbstractCegarLoop]: Abstraction has 965 states and 3099 transitions. [2021-03-10 21:26:31,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:31,475 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3099 transitions. [2021-03-10 21:26:31,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:31,476 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:31,476 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:31,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3268,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:31,697 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:31,697 INFO L82 PathProgramCache]: Analyzing trace with hash 667676149, now seen corresponding path program 71 times [2021-03-10 21:26:31,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:31,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701029046] [2021-03-10 21:26:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:31,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701029046] [2021-03-10 21:26:31,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861893904] [2021-03-10 21:26:31,757 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:31,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:26:31,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:31,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:31,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:31,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:31,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:31,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127066541] [2021-03-10 21:26:31,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:31,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:31,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:31,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:31,815 INFO L87 Difference]: Start difference. First operand 965 states and 3099 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:31,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:31,909 INFO L93 Difference]: Finished difference Result 1173 states and 3407 transitions. [2021-03-10 21:26:31,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:26:31,909 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:31,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:31,912 INFO L225 Difference]: With dead ends: 1173 [2021-03-10 21:26:31,912 INFO L226 Difference]: Without dead ends: 1173 [2021-03-10 21:26:31,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 87.1ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:26:31,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-03-10 21:26:31,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 959. [2021-03-10 21:26:31,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 3.1920668058455113) internal successors, (3058), 958 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 3058 transitions. [2021-03-10 21:26:31,928 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 3058 transitions. Word has length 20 [2021-03-10 21:26:31,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:31,928 INFO L480 AbstractCegarLoop]: Abstraction has 959 states and 3058 transitions. [2021-03-10 21:26:31,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:31,928 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 3058 transitions. [2021-03-10 21:26:31,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:31,929 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:31,930 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:32,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3269,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:32,151 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:32,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:32,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1750966282, now seen corresponding path program 72 times [2021-03-10 21:26:32,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:32,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773431108] [2021-03-10 21:26:32,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:32,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773431108] [2021-03-10 21:26:32,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178869075] [2021-03-10 21:26:32,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:32,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:26:32,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:32,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:32,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:32,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:32,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:32,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184615307] [2021-03-10 21:26:32,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:32,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:32,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:32,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:32,268 INFO L87 Difference]: Start difference. First operand 959 states and 3058 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:32,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:32,394 INFO L93 Difference]: Finished difference Result 1173 states and 3381 transitions. [2021-03-10 21:26:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:26:32,394 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:32,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:32,396 INFO L225 Difference]: With dead ends: 1173 [2021-03-10 21:26:32,397 INFO L226 Difference]: Without dead ends: 1171 [2021-03-10 21:26:32,397 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 103.5ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:26:32,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-03-10 21:26:32,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 971. [2021-03-10 21:26:32,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 3.193814432989691) internal successors, (3098), 970 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 3098 transitions. [2021-03-10 21:26:32,412 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 3098 transitions. Word has length 20 [2021-03-10 21:26:32,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:32,412 INFO L480 AbstractCegarLoop]: Abstraction has 971 states and 3098 transitions. [2021-03-10 21:26:32,412 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:32,412 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 3098 transitions. [2021-03-10 21:26:32,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:32,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:32,413 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:32,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3270,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:32,614 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:32,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:32,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1887198837, now seen corresponding path program 73 times [2021-03-10 21:26:32,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:32,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029082805] [2021-03-10 21:26:32,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:32,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029082805] [2021-03-10 21:26:32,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843769496] [2021-03-10 21:26:32,669 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:32,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:32,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:32,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:32,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:32,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597926505] [2021-03-10 21:26:32,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:32,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:32,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:32,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:32,719 INFO L87 Difference]: Start difference. First operand 971 states and 3098 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:32,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:32,854 INFO L93 Difference]: Finished difference Result 1115 states and 3298 transitions. [2021-03-10 21:26:32,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:26:32,855 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:32,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:32,856 INFO L225 Difference]: With dead ends: 1115 [2021-03-10 21:26:32,856 INFO L226 Difference]: Without dead ends: 1113 [2021-03-10 21:26:32,856 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 95.2ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:26:32,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-03-10 21:26:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 965. [2021-03-10 21:26:32,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 3.1898340248962658) internal successors, (3075), 964 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:32,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3075 transitions. [2021-03-10 21:26:32,884 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3075 transitions. Word has length 20 [2021-03-10 21:26:32,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:32,884 INFO L480 AbstractCegarLoop]: Abstraction has 965 states and 3075 transitions. [2021-03-10 21:26:32,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:32,884 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3075 transitions. [2021-03-10 21:26:32,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:32,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:32,885 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:33,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3271 [2021-03-10 21:26:33,086 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:33,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:33,086 INFO L82 PathProgramCache]: Analyzing trace with hash -964780104, now seen corresponding path program 74 times [2021-03-10 21:26:33,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:33,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603345989] [2021-03-10 21:26:33,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:33,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:33,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603345989] [2021-03-10 21:26:33,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909889108] [2021-03-10 21:26:33,146 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:33,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:33,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:33,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:33,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:33,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:33,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:33,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042429564] [2021-03-10 21:26:33,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:33,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:33,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:33,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:33,224 INFO L87 Difference]: Start difference. First operand 965 states and 3075 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:33,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:33,285 INFO L93 Difference]: Finished difference Result 1233 states and 3507 transitions. [2021-03-10 21:26:33,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:26:33,286 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:33,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:33,288 INFO L225 Difference]: With dead ends: 1233 [2021-03-10 21:26:33,288 INFO L226 Difference]: Without dead ends: 1233 [2021-03-10 21:26:33,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:33,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-03-10 21:26:33,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 967. [2021-03-10 21:26:33,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.18944099378882) internal successors, (3081), 966 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3081 transitions. [2021-03-10 21:26:33,304 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3081 transitions. Word has length 20 [2021-03-10 21:26:33,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:33,304 INFO L480 AbstractCegarLoop]: Abstraction has 967 states and 3081 transitions. [2021-03-10 21:26:33,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:33,304 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3081 transitions. [2021-03-10 21:26:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:33,306 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:33,306 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:33,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3272,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:33,527 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:33,527 INFO L82 PathProgramCache]: Analyzing trace with hash -176585529, now seen corresponding path program 75 times [2021-03-10 21:26:33,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:33,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075473922] [2021-03-10 21:26:33,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:33,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075473922] [2021-03-10 21:26:33,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360956982] [2021-03-10 21:26:33,590 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:33,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:26:33,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:33,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:33,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:33,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:33,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:26:33,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319401567] [2021-03-10 21:26:33,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:33,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:33,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:33,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:33,659 INFO L87 Difference]: Start difference. First operand 967 states and 3081 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:33,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:33,833 INFO L93 Difference]: Finished difference Result 1112 states and 3285 transitions. [2021-03-10 21:26:33,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:26:33,834 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:33,836 INFO L225 Difference]: With dead ends: 1112 [2021-03-10 21:26:33,836 INFO L226 Difference]: Without dead ends: 1110 [2021-03-10 21:26:33,836 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:33,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-03-10 21:26:33,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 967. [2021-03-10 21:26:33,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.1853002070393375) internal successors, (3077), 966 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:33,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3077 transitions. [2021-03-10 21:26:33,852 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3077 transitions. Word has length 20 [2021-03-10 21:26:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:33,852 INFO L480 AbstractCegarLoop]: Abstraction has 967 states and 3077 transitions. [2021-03-10 21:26:33,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3077 transitions. [2021-03-10 21:26:33,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:33,854 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:33,854 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:34,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3273 [2021-03-10 21:26:34,076 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:34,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:34,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1601139858, now seen corresponding path program 76 times [2021-03-10 21:26:34,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:34,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893050205] [2021-03-10 21:26:34,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:34,137 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:34,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893050205] [2021-03-10 21:26:34,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314647615] [2021-03-10 21:26:34,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:26:34,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:34,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:34,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:34,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:34,208 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:34,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:34,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:26:34,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367328358] [2021-03-10 21:26:34,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:34,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:34,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:34,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:34,209 INFO L87 Difference]: Start difference. First operand 967 states and 3077 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:34,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:34,286 INFO L93 Difference]: Finished difference Result 1326 states and 3712 transitions. [2021-03-10 21:26:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:34,287 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:34,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:34,288 INFO L225 Difference]: With dead ends: 1326 [2021-03-10 21:26:34,289 INFO L226 Difference]: Without dead ends: 1326 [2021-03-10 21:26:34,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:34,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-03-10 21:26:34,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 938. [2021-03-10 21:26:34,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.1643543223052295) internal successors, (2965), 937 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:34,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2965 transitions. [2021-03-10 21:26:34,305 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2965 transitions. Word has length 20 [2021-03-10 21:26:34,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:34,305 INFO L480 AbstractCegarLoop]: Abstraction has 938 states and 2965 transitions. [2021-03-10 21:26:34,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:34,305 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2965 transitions. [2021-03-10 21:26:34,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:34,307 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:34,307 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:34,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3274 [2021-03-10 21:26:34,527 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:34,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:34,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1312819467, now seen corresponding path program 77 times [2021-03-10 21:26:34,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:34,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908575470] [2021-03-10 21:26:34,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:34,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908575470] [2021-03-10 21:26:34,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057685168] [2021-03-10 21:26:34,595 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:34,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:26:34,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:34,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:34,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:34,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:34,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:26:34,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249703906] [2021-03-10 21:26:34,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:34,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:34,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:34,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:34,657 INFO L87 Difference]: Start difference. First operand 938 states and 2965 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:34,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:34,809 INFO L93 Difference]: Finished difference Result 1106 states and 3370 transitions. [2021-03-10 21:26:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:26:34,809 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:34,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:34,811 INFO L225 Difference]: With dead ends: 1106 [2021-03-10 21:26:34,811 INFO L226 Difference]: Without dead ends: 1103 [2021-03-10 21:26:34,811 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-03-10 21:26:34,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 941. [2021-03-10 21:26:34,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.1638297872340426) internal successors, (2974), 940 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:34,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2974 transitions. [2021-03-10 21:26:34,822 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2974 transitions. Word has length 20 [2021-03-10 21:26:34,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:34,822 INFO L480 AbstractCegarLoop]: Abstraction has 941 states and 2974 transitions. [2021-03-10 21:26:34,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2974 transitions. [2021-03-10 21:26:34,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:34,824 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:34,824 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:35,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3275 [2021-03-10 21:26:35,043 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:35,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:35,043 INFO L82 PathProgramCache]: Analyzing trace with hash -459719944, now seen corresponding path program 78 times [2021-03-10 21:26:35,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:35,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765989463] [2021-03-10 21:26:35,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:35,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765989463] [2021-03-10 21:26:35,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700316897] [2021-03-10 21:26:35,106 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:35,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:26:35,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:35,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:35,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:35,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:35,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:26:35,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553323319] [2021-03-10 21:26:35,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:35,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:35,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:35,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:35,177 INFO L87 Difference]: Start difference. First operand 941 states and 2974 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:35,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:35,283 INFO L93 Difference]: Finished difference Result 1725 states and 5166 transitions. [2021-03-10 21:26:35,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:26:35,284 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:35,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:35,286 INFO L225 Difference]: With dead ends: 1725 [2021-03-10 21:26:35,286 INFO L226 Difference]: Without dead ends: 1725 [2021-03-10 21:26:35,286 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:26:35,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2021-03-10 21:26:35,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1284. [2021-03-10 21:26:35,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.3265783320342948) internal successors, (4268), 1283 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4268 transitions. [2021-03-10 21:26:35,308 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4268 transitions. Word has length 20 [2021-03-10 21:26:35,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:35,308 INFO L480 AbstractCegarLoop]: Abstraction has 1284 states and 4268 transitions. [2021-03-10 21:26:35,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:35,308 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4268 transitions. [2021-03-10 21:26:35,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:35,310 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:35,310 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:35,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-03-10 21:26:35,529 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:35,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:35,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1312935261, now seen corresponding path program 79 times [2021-03-10 21:26:35,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:35,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005365405] [2021-03-10 21:26:35,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:35,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:35,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005365405] [2021-03-10 21:26:35,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201430705] [2021-03-10 21:26:35,589 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:26:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:35,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:35,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:35,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:35,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:35,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494741018] [2021-03-10 21:26:35,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:35,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:35,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:35,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:35,657 INFO L87 Difference]: Start difference. First operand 1284 states and 4268 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:35,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:35,758 INFO L93 Difference]: Finished difference Result 1481 states and 4527 transitions. [2021-03-10 21:26:35,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:26:35,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:35,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:35,760 INFO L225 Difference]: With dead ends: 1481 [2021-03-10 21:26:35,760 INFO L226 Difference]: Without dead ends: 1481 [2021-03-10 21:26:35,760 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:26:35,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-03-10 21:26:35,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1264. [2021-03-10 21:26:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 3.28978622327791) internal successors, (4155), 1263 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:35,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4155 transitions. [2021-03-10 21:26:35,774 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4155 transitions. Word has length 20 [2021-03-10 21:26:35,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:35,774 INFO L480 AbstractCegarLoop]: Abstraction has 1264 states and 4155 transitions. [2021-03-10 21:26:35,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:35,774 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4155 transitions. [2021-03-10 21:26:35,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:35,775 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:35,775 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:35,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3277,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:35,976 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:35,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:35,976 INFO L82 PathProgramCache]: Analyzing trace with hash -229645128, now seen corresponding path program 80 times [2021-03-10 21:26:35,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:35,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060913757] [2021-03-10 21:26:35,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:36,026 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:36,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060913757] [2021-03-10 21:26:36,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564119071] [2021-03-10 21:26:36,026 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:36,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:36,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:36,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:36,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:36,077 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:36,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:36,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:36,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163394645] [2021-03-10 21:26:36,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:36,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:36,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:36,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:36,078 INFO L87 Difference]: Start difference. First operand 1264 states and 4155 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:36,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:36,207 INFO L93 Difference]: Finished difference Result 1495 states and 4548 transitions. [2021-03-10 21:26:36,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:26:36,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:36,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:36,209 INFO L225 Difference]: With dead ends: 1495 [2021-03-10 21:26:36,209 INFO L226 Difference]: Without dead ends: 1493 [2021-03-10 21:26:36,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:26:36,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-03-10 21:26:36,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1297. [2021-03-10 21:26:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.2916666666666665) internal successors, (4266), 1296 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4266 transitions. [2021-03-10 21:26:36,228 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4266 transitions. Word has length 20 [2021-03-10 21:26:36,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:36,228 INFO L480 AbstractCegarLoop]: Abstraction has 1297 states and 4266 transitions. [2021-03-10 21:26:36,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:36,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4266 transitions. [2021-03-10 21:26:36,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:36,230 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:36,231 INFO L519 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:36,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3278,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:36,448 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:36,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:36,448 INFO L82 PathProgramCache]: Analyzing trace with hash 427157049, now seen corresponding path program 81 times [2021-03-10 21:26:36,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:36,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87854235] [2021-03-10 21:26:36,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:36,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87854235] [2021-03-10 21:26:36,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985800394] [2021-03-10 21:26:36,508 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:26:36,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:26:36,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:36,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:26:36,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:36,688 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:36,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:36,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-03-10 21:26:36,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701647823] [2021-03-10 21:26:36,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:26:36,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:36,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:26:36,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:36,689 INFO L87 Difference]: Start difference. First operand 1297 states and 4266 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:37,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:37,607 INFO L93 Difference]: Finished difference Result 2116 states and 6354 transitions. [2021-03-10 21:26:37,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-03-10 21:26:37,607 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:37,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:37,609 INFO L225 Difference]: With dead ends: 2116 [2021-03-10 21:26:37,609 INFO L226 Difference]: Without dead ends: 2110 [2021-03-10 21:26:37,610 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 730.7ms TimeCoverageRelationStatistics Valid=690, Invalid=5316, Unknown=0, NotChecked=0, Total=6006 [2021-03-10 21:26:37,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-03-10 21:26:37,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1671. [2021-03-10 21:26:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.2149700598802395) internal successors, (5369), 1670 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:37,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5369 transitions. [2021-03-10 21:26:37,630 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5369 transitions. Word has length 20 [2021-03-10 21:26:37,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:37,630 INFO L480 AbstractCegarLoop]: Abstraction has 1671 states and 5369 transitions. [2021-03-10 21:26:37,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:37,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5369 transitions. [2021-03-10 21:26:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:37,633 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:37,633 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:37,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3279,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:37,833 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:37,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:37,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1349575782, now seen corresponding path program 82 times [2021-03-10 21:26:37,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:37,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946860577] [2021-03-10 21:26:37,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:37,890 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:37,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946860577] [2021-03-10 21:26:37,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440353129] [2021-03-10 21:26:37,891 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:37,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:37,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:37,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:37,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:37,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:37,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:37,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176411820] [2021-03-10 21:26:37,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:37,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:37,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:37,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:37,958 INFO L87 Difference]: Start difference. First operand 1671 states and 5369 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:38,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:38,020 INFO L93 Difference]: Finished difference Result 1971 states and 5778 transitions. [2021-03-10 21:26:38,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:26:38,020 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:38,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:38,023 INFO L225 Difference]: With dead ends: 1971 [2021-03-10 21:26:38,023 INFO L226 Difference]: Without dead ends: 1971 [2021-03-10 21:26:38,023 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:38,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-03-10 21:26:38,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1669. [2021-03-10 21:26:38,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.2044364508393284) internal successors, (5345), 1668 states have internal predecessors, (5345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5345 transitions. [2021-03-10 21:26:38,049 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5345 transitions. Word has length 20 [2021-03-10 21:26:38,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:38,050 INFO L480 AbstractCegarLoop]: Abstraction has 1669 states and 5345 transitions. [2021-03-10 21:26:38,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:38,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5345 transitions. [2021-03-10 21:26:38,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:38,052 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:38,052 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:38,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3280,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:38,272 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:38,273 INFO L82 PathProgramCache]: Analyzing trace with hash -379471552, now seen corresponding path program 83 times [2021-03-10 21:26:38,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:38,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672059333] [2021-03-10 21:26:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:38,333 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:38,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672059333] [2021-03-10 21:26:38,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689352016] [2021-03-10 21:26:38,334 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:38,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:26:38,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:38,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:38,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:38,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:38,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:26:38,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622805494] [2021-03-10 21:26:38,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:38,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:38,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:38,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:38,413 INFO L87 Difference]: Start difference. First operand 1669 states and 5345 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:38,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:38,507 INFO L93 Difference]: Finished difference Result 2070 states and 5985 transitions. [2021-03-10 21:26:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:38,508 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:38,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:38,511 INFO L225 Difference]: With dead ends: 2070 [2021-03-10 21:26:38,511 INFO L226 Difference]: Without dead ends: 2070 [2021-03-10 21:26:38,511 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:38,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-03-10 21:26:38,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1581. [2021-03-10 21:26:38,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 3.1848101265822786) internal successors, (5032), 1580 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 5032 transitions. [2021-03-10 21:26:38,537 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 5032 transitions. Word has length 20 [2021-03-10 21:26:38,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:38,537 INFO L480 AbstractCegarLoop]: Abstraction has 1581 states and 5032 transitions. [2021-03-10 21:26:38,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:38,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 5032 transitions. [2021-03-10 21:26:38,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:38,540 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:38,540 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:38,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3281 [2021-03-10 21:26:38,759 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:38,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:38,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1854635942, now seen corresponding path program 84 times [2021-03-10 21:26:38,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:38,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823740779] [2021-03-10 21:26:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:38,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823740779] [2021-03-10 21:26:38,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171718213] [2021-03-10 21:26:38,821 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:38,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:26:38,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:38,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:38,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:38,886 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:38,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:38,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:26:38,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786930353] [2021-03-10 21:26:38,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:38,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:38,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:38,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:38,887 INFO L87 Difference]: Start difference. First operand 1581 states and 5032 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:38,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:38,977 INFO L93 Difference]: Finished difference Result 2650 states and 8050 transitions. [2021-03-10 21:26:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:38,978 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:38,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:38,980 INFO L225 Difference]: With dead ends: 2650 [2021-03-10 21:26:38,980 INFO L226 Difference]: Without dead ends: 2650 [2021-03-10 21:26:38,980 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:26:38,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-03-10 21:26:39,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2152. [2021-03-10 21:26:39,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 3.3170618317061833) internal successors, (7135), 2151 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 7135 transitions. [2021-03-10 21:26:39,005 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 7135 transitions. Word has length 20 [2021-03-10 21:26:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:39,005 INFO L480 AbstractCegarLoop]: Abstraction has 2152 states and 7135 transitions. [2021-03-10 21:26:39,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:39,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 7135 transitions. [2021-03-10 21:26:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:39,007 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:39,007 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:39,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3282,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:39,207 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:39,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:39,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1902475776, now seen corresponding path program 85 times [2021-03-10 21:26:39,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:39,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183313818] [2021-03-10 21:26:39,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:39,273 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:39,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183313818] [2021-03-10 21:26:39,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086909491] [2021-03-10 21:26:39,273 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:39,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:39,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:39,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:39,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:26:39,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147220499] [2021-03-10 21:26:39,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:39,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:39,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:39,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:39,344 INFO L87 Difference]: Start difference. First operand 2152 states and 7135 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:39,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:39,522 INFO L93 Difference]: Finished difference Result 3538 states and 11103 transitions. [2021-03-10 21:26:39,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:26:39,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:39,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:39,528 INFO L225 Difference]: With dead ends: 3538 [2021-03-10 21:26:39,528 INFO L226 Difference]: Without dead ends: 3538 [2021-03-10 21:26:39,529 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:39,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2021-03-10 21:26:39,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 2878. [2021-03-10 21:26:39,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2878 states, 2877 states have (on average 3.397636426833507) internal successors, (9775), 2877 states have internal predecessors, (9775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:39,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2878 states to 2878 states and 9775 transitions. [2021-03-10 21:26:39,570 INFO L78 Accepts]: Start accepts. Automaton has 2878 states and 9775 transitions. Word has length 20 [2021-03-10 21:26:39,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:39,570 INFO L480 AbstractCegarLoop]: Abstraction has 2878 states and 9775 transitions. [2021-03-10 21:26:39,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 2878 states and 9775 transitions. [2021-03-10 21:26:39,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:39,573 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:39,573 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:39,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3283 [2021-03-10 21:26:39,773 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:39,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:39,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1499056694, now seen corresponding path program 86 times [2021-03-10 21:26:39,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:39,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612177389] [2021-03-10 21:26:39,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:39,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612177389] [2021-03-10 21:26:39,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502594320] [2021-03-10 21:26:39,821 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:39,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:39,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:39,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:39,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:39,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:39,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:39,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291368709] [2021-03-10 21:26:39,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:39,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:39,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:39,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:39,871 INFO L87 Difference]: Start difference. First operand 2878 states and 9775 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:39,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:39,998 INFO L93 Difference]: Finished difference Result 3252 states and 10560 transitions. [2021-03-10 21:26:39,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:26:39,999 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:39,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:40,002 INFO L225 Difference]: With dead ends: 3252 [2021-03-10 21:26:40,002 INFO L226 Difference]: Without dead ends: 3250 [2021-03-10 21:26:40,002 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:26:40,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2021-03-10 21:26:40,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 3003. [2021-03-10 21:26:40,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 3.389407061958694) internal successors, (10175), 3002 states have internal predecessors, (10175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:40,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 10175 transitions. [2021-03-10 21:26:40,055 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 10175 transitions. Word has length 20 [2021-03-10 21:26:40,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:40,055 INFO L480 AbstractCegarLoop]: Abstraction has 3003 states and 10175 transitions. [2021-03-10 21:26:40,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:40,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 10175 transitions. [2021-03-10 21:26:40,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:40,057 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:40,057 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:40,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3284 [2021-03-10 21:26:40,258 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:40,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:40,258 INFO L82 PathProgramCache]: Analyzing trace with hash 80164216, now seen corresponding path program 87 times [2021-03-10 21:26:40,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:40,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798730475] [2021-03-10 21:26:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:40,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:40,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798730475] [2021-03-10 21:26:40,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829206435] [2021-03-10 21:26:40,313 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:26:40,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:26:40,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:40,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:40,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:40,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:40,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:40,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173414010] [2021-03-10 21:26:40,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:40,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:40,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:40,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:40,400 INFO L87 Difference]: Start difference. First operand 3003 states and 10175 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:40,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:40,466 INFO L93 Difference]: Finished difference Result 3239 states and 10385 transitions. [2021-03-10 21:26:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:26:40,466 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:40,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:40,471 INFO L225 Difference]: With dead ends: 3239 [2021-03-10 21:26:40,471 INFO L226 Difference]: Without dead ends: 3239 [2021-03-10 21:26:40,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:40,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2021-03-10 21:26:40,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 2935. [2021-03-10 21:26:40,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 3.3677573278800272) internal successors, (9881), 2934 states have internal predecessors, (9881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:40,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 9881 transitions. [2021-03-10 21:26:40,526 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 9881 transitions. Word has length 20 [2021-03-10 21:26:40,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:40,527 INFO L480 AbstractCegarLoop]: Abstraction has 2935 states and 9881 transitions. [2021-03-10 21:26:40,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:40,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 9881 transitions. [2021-03-10 21:26:40,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:40,530 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:40,530 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:40,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3285,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:40,743 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:40,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:40,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1648883118, now seen corresponding path program 88 times [2021-03-10 21:26:40,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:40,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78476574] [2021-03-10 21:26:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:40,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78476574] [2021-03-10 21:26:40,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532641955] [2021-03-10 21:26:40,808 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:26:40,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:40,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:40,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:40,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:40,878 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:40,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:40,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:40,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505515484] [2021-03-10 21:26:40,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:40,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:40,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:40,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:40,879 INFO L87 Difference]: Start difference. First operand 2935 states and 9881 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:40,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:40,972 INFO L93 Difference]: Finished difference Result 3341 states and 10608 transitions. [2021-03-10 21:26:40,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:26:40,973 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:40,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:40,978 INFO L225 Difference]: With dead ends: 3341 [2021-03-10 21:26:40,978 INFO L226 Difference]: Without dead ends: 3341 [2021-03-10 21:26:40,979 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:40,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2021-03-10 21:26:41,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 2802. [2021-03-10 21:26:41,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 3.3491610139235988) internal successors, (9381), 2801 states have internal predecessors, (9381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:41,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 9381 transitions. [2021-03-10 21:26:41,026 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 9381 transitions. Word has length 20 [2021-03-10 21:26:41,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:41,026 INFO L480 AbstractCegarLoop]: Abstraction has 2802 states and 9381 transitions. [2021-03-10 21:26:41,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:41,026 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 9381 transitions. [2021-03-10 21:26:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:41,029 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:41,029 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:41,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3286,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:41,243 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:41,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:41,243 INFO L82 PathProgramCache]: Analyzing trace with hash 585224376, now seen corresponding path program 89 times [2021-03-10 21:26:41,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:41,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621621964] [2021-03-10 21:26:41,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:41,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621621964] [2021-03-10 21:26:41,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748527541] [2021-03-10 21:26:41,300 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:41,322 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:26:41,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:41,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:41,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:41,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:41,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:41,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004265384] [2021-03-10 21:26:41,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:41,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:41,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:41,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:41,358 INFO L87 Difference]: Start difference. First operand 2802 states and 9381 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:41,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:41,449 INFO L93 Difference]: Finished difference Result 4613 states and 15295 transitions. [2021-03-10 21:26:41,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:26:41,450 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:41,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:41,455 INFO L225 Difference]: With dead ends: 4613 [2021-03-10 21:26:41,455 INFO L226 Difference]: Without dead ends: 4613 [2021-03-10 21:26:41,455 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:26:41,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-03-10 21:26:41,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4212. [2021-03-10 21:26:41,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4212 states, 4211 states have (on average 3.4713844692472096) internal successors, (14618), 4211 states have internal predecessors, (14618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:41,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4212 states to 4212 states and 14618 transitions. [2021-03-10 21:26:41,504 INFO L78 Accepts]: Start accepts. Automaton has 4212 states and 14618 transitions. Word has length 20 [2021-03-10 21:26:41,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:41,504 INFO L480 AbstractCegarLoop]: Abstraction has 4212 states and 14618 transitions. [2021-03-10 21:26:41,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:41,504 INFO L276 IsEmpty]: Start isEmpty. Operand 4212 states and 14618 transitions. [2021-03-10 21:26:41,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:41,507 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:41,507 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:41,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3287 [2021-03-10 21:26:41,708 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:41,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:41,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1123079954, now seen corresponding path program 90 times [2021-03-10 21:26:41,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:41,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036736633] [2021-03-10 21:26:41,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:41,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:41,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036736633] [2021-03-10 21:26:41,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646687577] [2021-03-10 21:26:41,772 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:26:41,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:26:41,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:41,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:41,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:41,838 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:41,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:41,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:41,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691195639] [2021-03-10 21:26:41,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:41,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:41,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:41,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:41,839 INFO L87 Difference]: Start difference. First operand 4212 states and 14618 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:41,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:41,989 INFO L93 Difference]: Finished difference Result 5440 states and 18349 transitions. [2021-03-10 21:26:41,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:26:41,989 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:41,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:41,996 INFO L225 Difference]: With dead ends: 5440 [2021-03-10 21:26:41,996 INFO L226 Difference]: Without dead ends: 5440 [2021-03-10 21:26:41,996 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:26:41,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5440 states. [2021-03-10 21:26:42,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5440 to 5067. [2021-03-10 21:26:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 5066 states have (on average 3.5063166206079748) internal successors, (17763), 5066 states have internal predecessors, (17763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 17763 transitions. [2021-03-10 21:26:42,065 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 17763 transitions. Word has length 20 [2021-03-10 21:26:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:42,065 INFO L480 AbstractCegarLoop]: Abstraction has 5067 states and 17763 transitions. [2021-03-10 21:26:42,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 17763 transitions. [2021-03-10 21:26:42,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:42,069 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:42,069 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:42,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3288,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:42,269 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:42,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:42,269 INFO L82 PathProgramCache]: Analyzing trace with hash 616733688, now seen corresponding path program 91 times [2021-03-10 21:26:42,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:42,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547809840] [2021-03-10 21:26:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:42,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547809840] [2021-03-10 21:26:42,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918403032] [2021-03-10 21:26:42,333 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:42,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:42,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:42,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:42,396 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:42,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:42,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:42,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712125246] [2021-03-10 21:26:42,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:42,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:42,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:42,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:42,397 INFO L87 Difference]: Start difference. First operand 5067 states and 17763 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:42,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:42,584 INFO L93 Difference]: Finished difference Result 6110 states and 20625 transitions. [2021-03-10 21:26:42,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:26:42,584 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:42,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:42,591 INFO L225 Difference]: With dead ends: 6110 [2021-03-10 21:26:42,591 INFO L226 Difference]: Without dead ends: 6110 [2021-03-10 21:26:42,591 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 161.7ms TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:26:42,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6110 states. [2021-03-10 21:26:42,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6110 to 5618. [2021-03-10 21:26:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5618 states, 5617 states have (on average 3.5143314936799004) internal successors, (19740), 5617 states have internal predecessors, (19740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5618 states to 5618 states and 19740 transitions. [2021-03-10 21:26:42,658 INFO L78 Accepts]: Start accepts. Automaton has 5618 states and 19740 transitions. Word has length 20 [2021-03-10 21:26:42,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:42,658 INFO L480 AbstractCegarLoop]: Abstraction has 5618 states and 19740 transitions. [2021-03-10 21:26:42,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:42,658 INFO L276 IsEmpty]: Start isEmpty. Operand 5618 states and 19740 transitions. [2021-03-10 21:26:42,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:42,662 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:42,662 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:42,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3289,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:42,862 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:42,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:42,863 INFO L82 PathProgramCache]: Analyzing trace with hash -2093644800, now seen corresponding path program 92 times [2021-03-10 21:26:42,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:42,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230218097] [2021-03-10 21:26:42,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:42,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230218097] [2021-03-10 21:26:42,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475847647] [2021-03-10 21:26:42,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:42,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:42,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:42,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:42,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:26:42,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:42,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:26:42,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140540509] [2021-03-10 21:26:42,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:26:42,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:42,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:26:42,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:26:42,971 INFO L87 Difference]: Start difference. First operand 5618 states and 19740 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:43,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:43,177 INFO L93 Difference]: Finished difference Result 7038 states and 24489 transitions. [2021-03-10 21:26:43,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:26:43,178 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:43,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:43,189 INFO L225 Difference]: With dead ends: 7038 [2021-03-10 21:26:43,190 INFO L226 Difference]: Without dead ends: 7034 [2021-03-10 21:26:43,190 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:43,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7034 states. [2021-03-10 21:26:43,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7034 to 6840. [2021-03-10 21:26:43,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 6839 states have (on average 3.5451089340546864) internal successors, (24245), 6839 states have internal predecessors, (24245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:43,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 24245 transitions. [2021-03-10 21:26:43,313 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 24245 transitions. Word has length 20 [2021-03-10 21:26:43,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:43,313 INFO L480 AbstractCegarLoop]: Abstraction has 6840 states and 24245 transitions. [2021-03-10 21:26:43,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:43,313 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 24245 transitions. [2021-03-10 21:26:43,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:43,319 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:43,319 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:43,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3290 [2021-03-10 21:26:43,538 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:43,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:43,538 INFO L82 PathProgramCache]: Analyzing trace with hash 178840000, now seen corresponding path program 93 times [2021-03-10 21:26:43,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:43,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273423247] [2021-03-10 21:26:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:43,594 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:43,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273423247] [2021-03-10 21:26:43,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780590221] [2021-03-10 21:26:43,594 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:43,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:26:43,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:43,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:43,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:43,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:43,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:26:43,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894349570] [2021-03-10 21:26:43,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:26:43,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:43,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:26:43,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:26:43,664 INFO L87 Difference]: Start difference. First operand 6840 states and 24245 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:26:43,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:43,773 INFO L93 Difference]: Finished difference Result 7707 states and 26447 transitions. [2021-03-10 21:26:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:43,773 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 20 [2021-03-10 21:26:43,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:43,782 INFO L225 Difference]: With dead ends: 7707 [2021-03-10 21:26:43,782 INFO L226 Difference]: Without dead ends: 7707 [2021-03-10 21:26:43,783 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:26:43,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7707 states. [2021-03-10 21:26:43,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7707 to 7206. [2021-03-10 21:26:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7206 states, 7205 states have (on average 3.5443442054129077) internal successors, (25537), 7205 states have internal predecessors, (25537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:43,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7206 states to 7206 states and 25537 transitions. [2021-03-10 21:26:43,871 INFO L78 Accepts]: Start accepts. Automaton has 7206 states and 25537 transitions. Word has length 20 [2021-03-10 21:26:43,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:43,872 INFO L480 AbstractCegarLoop]: Abstraction has 7206 states and 25537 transitions. [2021-03-10 21:26:43,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:26:43,872 INFO L276 IsEmpty]: Start isEmpty. Operand 7206 states and 25537 transitions. [2021-03-10 21:26:43,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:43,876 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:43,876 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:44,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3291,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:44,079 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:44,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:44,079 INFO L82 PathProgramCache]: Analyzing trace with hash -327506266, now seen corresponding path program 94 times [2021-03-10 21:26:44,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:44,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338988357] [2021-03-10 21:26:44,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:44,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338988357] [2021-03-10 21:26:44,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843755080] [2021-03-10 21:26:44,132 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:44,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:44,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:44,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:44,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:44,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:44,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:44,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347713033] [2021-03-10 21:26:44,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:44,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:44,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:44,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:44,186 INFO L87 Difference]: Start difference. First operand 7206 states and 25537 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:44,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:44,303 INFO L93 Difference]: Finished difference Result 8954 states and 30890 transitions. [2021-03-10 21:26:44,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:26:44,304 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:44,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:44,315 INFO L225 Difference]: With dead ends: 8954 [2021-03-10 21:26:44,316 INFO L226 Difference]: Without dead ends: 8954 [2021-03-10 21:26:44,316 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 78.5ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:26:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8954 states. [2021-03-10 21:26:44,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8954 to 8254. [2021-03-10 21:26:44,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8254 states, 8253 states have (on average 3.561008118260027) internal successors, (29389), 8253 states have internal predecessors, (29389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:44,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8254 states to 8254 states and 29389 transitions. [2021-03-10 21:26:44,445 INFO L78 Accepts]: Start accepts. Automaton has 8254 states and 29389 transitions. Word has length 20 [2021-03-10 21:26:44,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:44,445 INFO L480 AbstractCegarLoop]: Abstraction has 8254 states and 29389 transitions. [2021-03-10 21:26:44,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:44,446 INFO L276 IsEmpty]: Start isEmpty. Operand 8254 states and 29389 transitions. [2021-03-10 21:26:44,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:44,450 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:44,450 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:44,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3292,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:44,651 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:44,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:44,651 INFO L82 PathProgramCache]: Analyzing trace with hash 210349312, now seen corresponding path program 95 times [2021-03-10 21:26:44,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:44,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212400585] [2021-03-10 21:26:44,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:44,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:44,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212400585] [2021-03-10 21:26:44,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479360170] [2021-03-10 21:26:44,706 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:44,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:26:44,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:44,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:44,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:44,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:44,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:44,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540706911] [2021-03-10 21:26:44,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:44,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:44,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:44,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:44,762 INFO L87 Difference]: Start difference. First operand 8254 states and 29389 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:44,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:44,954 INFO L93 Difference]: Finished difference Result 9105 states and 31585 transitions. [2021-03-10 21:26:44,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:26:44,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:44,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:44,968 INFO L225 Difference]: With dead ends: 9105 [2021-03-10 21:26:44,968 INFO L226 Difference]: Without dead ends: 9105 [2021-03-10 21:26:44,969 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:44,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2021-03-10 21:26:45,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 8656. [2021-03-10 21:26:45,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8656 states, 8655 states have (on average 3.5648757943385325) internal successors, (30854), 8655 states have internal predecessors, (30854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:45,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8656 states to 8656 states and 30854 transitions. [2021-03-10 21:26:45,134 INFO L78 Accepts]: Start accepts. Automaton has 8656 states and 30854 transitions. Word has length 20 [2021-03-10 21:26:45,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:45,134 INFO L480 AbstractCegarLoop]: Abstraction has 8656 states and 30854 transitions. [2021-03-10 21:26:45,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:45,134 INFO L276 IsEmpty]: Start isEmpty. Operand 8656 states and 30854 transitions. [2021-03-10 21:26:45,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:45,138 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:45,138 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:45,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3293 [2021-03-10 21:26:45,339 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:45,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:45,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1155628672, now seen corresponding path program 96 times [2021-03-10 21:26:45,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:45,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081019254] [2021-03-10 21:26:45,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:45,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081019254] [2021-03-10 21:26:45,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878352437] [2021-03-10 21:26:45,461 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:45,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:26:45,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:45,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:45,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:45,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:45,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:45,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190279110] [2021-03-10 21:26:45,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:45,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:45,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:45,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:45,544 INFO L87 Difference]: Start difference. First operand 8656 states and 30854 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:45,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:45,677 INFO L93 Difference]: Finished difference Result 9529 states and 33025 transitions. [2021-03-10 21:26:45,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:26:45,677 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:45,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:45,690 INFO L225 Difference]: With dead ends: 9529 [2021-03-10 21:26:45,690 INFO L226 Difference]: Without dead ends: 9529 [2021-03-10 21:26:45,690 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:26:45,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9529 states. [2021-03-10 21:26:45,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9529 to 4249. [2021-03-10 21:26:45,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4249 states, 4248 states have (on average 3.398069679849341) internal successors, (14435), 4248 states have internal predecessors, (14435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:45,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4249 states to 4249 states and 14435 transitions. [2021-03-10 21:26:45,773 INFO L78 Accepts]: Start accepts. Automaton has 4249 states and 14435 transitions. Word has length 20 [2021-03-10 21:26:45,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:45,774 INFO L480 AbstractCegarLoop]: Abstraction has 4249 states and 14435 transitions. [2021-03-10 21:26:45,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:45,774 INFO L276 IsEmpty]: Start isEmpty. Operand 4249 states and 14435 transitions. [2021-03-10 21:26:45,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:45,777 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:45,777 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:45,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3294 [2021-03-10 21:26:45,983 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:45,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:45,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1693484250, now seen corresponding path program 97 times [2021-03-10 21:26:45,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:45,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36406983] [2021-03-10 21:26:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:45,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:46,050 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:46,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36406983] [2021-03-10 21:26:46,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851626657] [2021-03-10 21:26:46,050 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:46,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:46,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:46,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:46,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:46,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835715059] [2021-03-10 21:26:46,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:46,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:46,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:46,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:46,105 INFO L87 Difference]: Start difference. First operand 4249 states and 14435 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:46,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:46,226 INFO L93 Difference]: Finished difference Result 5911 states and 19624 transitions. [2021-03-10 21:26:46,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:26:46,226 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:46,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:46,233 INFO L225 Difference]: With dead ends: 5911 [2021-03-10 21:26:46,234 INFO L226 Difference]: Without dead ends: 5911 [2021-03-10 21:26:46,234 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:26:46,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-03-10 21:26:46,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4539. [2021-03-10 21:26:46,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 3.4169237549581313) internal successors, (15506), 4538 states have internal predecessors, (15506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:46,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 15506 transitions. [2021-03-10 21:26:46,294 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 15506 transitions. Word has length 20 [2021-03-10 21:26:46,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:46,294 INFO L480 AbstractCegarLoop]: Abstraction has 4539 states and 15506 transitions. [2021-03-10 21:26:46,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:46,294 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 15506 transitions. [2021-03-10 21:26:46,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:46,297 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:46,297 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:46,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3295,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:46,498 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:46,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:46,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1187137984, now seen corresponding path program 98 times [2021-03-10 21:26:46,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:46,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555228229] [2021-03-10 21:26:46,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:46,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555228229] [2021-03-10 21:26:46,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462437316] [2021-03-10 21:26:46,589 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:46,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:46,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:46,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:46,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:46,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:46,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:46,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978576926] [2021-03-10 21:26:46,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:46,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:46,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:46,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:46,658 INFO L87 Difference]: Start difference. First operand 4539 states and 15506 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:46,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:46,847 INFO L93 Difference]: Finished difference Result 5172 states and 16881 transitions. [2021-03-10 21:26:46,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:26:46,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:46,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:46,853 INFO L225 Difference]: With dead ends: 5172 [2021-03-10 21:26:46,853 INFO L226 Difference]: Without dead ends: 5172 [2021-03-10 21:26:46,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 181.9ms TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:26:46,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2021-03-10 21:26:46,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 4463. [2021-03-10 21:26:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4462 states have (on average 3.4195428059166293) internal successors, (15258), 4462 states have internal predecessors, (15258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:46,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 15258 transitions. [2021-03-10 21:26:46,921 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 15258 transitions. Word has length 20 [2021-03-10 21:26:46,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:46,922 INFO L480 AbstractCegarLoop]: Abstraction has 4463 states and 15258 transitions. [2021-03-10 21:26:46,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:46,922 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 15258 transitions. [2021-03-10 21:26:46,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:46,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:46,925 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:47,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3296 [2021-03-10 21:26:47,125 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:47,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:47,126 INFO L82 PathProgramCache]: Analyzing trace with hash 2098857720, now seen corresponding path program 99 times [2021-03-10 21:26:47,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:47,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539551895] [2021-03-10 21:26:47,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:47,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:47,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539551895] [2021-03-10 21:26:47,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149972314] [2021-03-10 21:26:47,178 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:47,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:26:47,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:47,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:47,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:47,235 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:47,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:47,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:47,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825623548] [2021-03-10 21:26:47,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:47,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:47,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:47,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:47,236 INFO L87 Difference]: Start difference. First operand 4463 states and 15258 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:47,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:47,378 INFO L93 Difference]: Finished difference Result 4711 states and 15597 transitions. [2021-03-10 21:26:47,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:26:47,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:47,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:47,383 INFO L225 Difference]: With dead ends: 4711 [2021-03-10 21:26:47,383 INFO L226 Difference]: Without dead ends: 4707 [2021-03-10 21:26:47,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:26:47,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4707 states. [2021-03-10 21:26:47,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4707 to 4073. [2021-03-10 21:26:47,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 4072 states have (on average 3.394400785854617) internal successors, (13822), 4072 states have internal predecessors, (13822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:47,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 13822 transitions. [2021-03-10 21:26:47,431 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 13822 transitions. Word has length 20 [2021-03-10 21:26:47,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:47,431 INFO L480 AbstractCegarLoop]: Abstraction has 4073 states and 13822 transitions. [2021-03-10 21:26:47,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:47,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 13822 transitions. [2021-03-10 21:26:47,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:47,434 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:47,434 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:47,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3297 [2021-03-10 21:26:47,634 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:47,634 INFO L82 PathProgramCache]: Analyzing trace with hash -616888666, now seen corresponding path program 100 times [2021-03-10 21:26:47,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:47,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197266993] [2021-03-10 21:26:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:47,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197266993] [2021-03-10 21:26:47,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525324802] [2021-03-10 21:26:47,688 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:47,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:47,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:47,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:47,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:47,740 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:47,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:47,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:47,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492608711] [2021-03-10 21:26:47,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:47,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:47,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:47,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:47,741 INFO L87 Difference]: Start difference. First operand 4073 states and 13822 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:47,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:47,807 INFO L93 Difference]: Finished difference Result 4367 states and 14243 transitions. [2021-03-10 21:26:47,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:26:47,808 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:47,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:47,812 INFO L225 Difference]: With dead ends: 4367 [2021-03-10 21:26:47,812 INFO L226 Difference]: Without dead ends: 4367 [2021-03-10 21:26:47,812 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 52.3ms TimeCoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:47,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4367 states. [2021-03-10 21:26:47,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4367 to 4077. [2021-03-10 21:26:47,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4077 states, 4076 states have (on average 3.3851815505397447) internal successors, (13798), 4076 states have internal predecessors, (13798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:47,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4077 states to 4077 states and 13798 transitions. [2021-03-10 21:26:47,874 INFO L78 Accepts]: Start accepts. Automaton has 4077 states and 13798 transitions. Word has length 20 [2021-03-10 21:26:47,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:47,875 INFO L480 AbstractCegarLoop]: Abstraction has 4077 states and 13798 transitions. [2021-03-10 21:26:47,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:47,875 INFO L276 IsEmpty]: Start isEmpty. Operand 4077 states and 13798 transitions. [2021-03-10 21:26:47,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:47,877 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:47,877 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:48,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3298 [2021-03-10 21:26:48,079 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:48,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:48,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1949031296, now seen corresponding path program 101 times [2021-03-10 21:26:48,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:48,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252342131] [2021-03-10 21:26:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:48,148 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:48,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252342131] [2021-03-10 21:26:48,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053389789] [2021-03-10 21:26:48,148 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:26:48,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:26:48,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:48,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:48,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:48,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:48,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:26:48,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810662331] [2021-03-10 21:26:48,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:48,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:48,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:48,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:48,228 INFO L87 Difference]: Start difference. First operand 4077 states and 13798 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:48,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:48,315 INFO L93 Difference]: Finished difference Result 4294 states and 13975 transitions. [2021-03-10 21:26:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:26:48,316 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:48,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:48,323 INFO L225 Difference]: With dead ends: 4294 [2021-03-10 21:26:48,323 INFO L226 Difference]: Without dead ends: 4294 [2021-03-10 21:26:48,323 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:48,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2021-03-10 21:26:48,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 3913. [2021-03-10 21:26:48,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 3.3785787321063396) internal successors, (13217), 3912 states have internal predecessors, (13217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:48,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 13217 transitions. [2021-03-10 21:26:48,394 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 13217 transitions. Word has length 20 [2021-03-10 21:26:48,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:48,394 INFO L480 AbstractCegarLoop]: Abstraction has 3913 states and 13217 transitions. [2021-03-10 21:26:48,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:48,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 13217 transitions. [2021-03-10 21:26:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:48,398 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:48,398 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:48,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3299,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:48,607 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:48,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:48,607 INFO L82 PathProgramCache]: Analyzing trace with hash -111828506, now seen corresponding path program 102 times [2021-03-10 21:26:48,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:48,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380277539] [2021-03-10 21:26:48,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:48,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:48,665 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:48,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380277539] [2021-03-10 21:26:48,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842391395] [2021-03-10 21:26:48,665 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:48,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:26:48,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:48,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:48,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:48,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:48,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:26:48,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979699678] [2021-03-10 21:26:48,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:48,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:48,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:48,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:48,727 INFO L87 Difference]: Start difference. First operand 3913 states and 13217 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:48,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:48,852 INFO L93 Difference]: Finished difference Result 4333 states and 14025 transitions. [2021-03-10 21:26:48,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:48,852 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:26:48,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:48,856 INFO L225 Difference]: With dead ends: 4333 [2021-03-10 21:26:48,857 INFO L226 Difference]: Without dead ends: 4333 [2021-03-10 21:26:48,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:26:48,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-03-10 21:26:48,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3900. [2021-03-10 21:26:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3900 states, 3899 states have (on average 3.368043087971275) internal successors, (13132), 3899 states have internal predecessors, (13132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 13132 transitions. [2021-03-10 21:26:48,904 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 13132 transitions. Word has length 20 [2021-03-10 21:26:48,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:48,904 INFO L480 AbstractCegarLoop]: Abstraction has 3900 states and 13132 transitions. [2021-03-10 21:26:48,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:48,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 13132 transitions. [2021-03-10 21:26:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:48,907 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:48,907 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:49,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3300,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:49,108 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:49,108 INFO L82 PathProgramCache]: Analyzing trace with hash 426027072, now seen corresponding path program 103 times [2021-03-10 21:26:49,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:49,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327329259] [2021-03-10 21:26:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:49,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327329259] [2021-03-10 21:26:49,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937929503] [2021-03-10 21:26:49,169 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:49,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:49,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:49,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:49,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:49,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:26:49,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345354851] [2021-03-10 21:26:49,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:49,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:49,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:49,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:49,238 INFO L87 Difference]: Start difference. First operand 3900 states and 13132 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:49,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:49,346 INFO L93 Difference]: Finished difference Result 5075 states and 16651 transitions. [2021-03-10 21:26:49,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:49,346 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:26:49,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:49,352 INFO L225 Difference]: With dead ends: 5075 [2021-03-10 21:26:49,352 INFO L226 Difference]: Without dead ends: 5075 [2021-03-10 21:26:49,352 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:26:49,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2021-03-10 21:26:49,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 4093. [2021-03-10 21:26:49,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4092 states have (on average 3.374144672531769) internal successors, (13807), 4092 states have internal predecessors, (13807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:49,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 13807 transitions. [2021-03-10 21:26:49,402 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 13807 transitions. Word has length 20 [2021-03-10 21:26:49,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:49,402 INFO L480 AbstractCegarLoop]: Abstraction has 4093 states and 13807 transitions. [2021-03-10 21:26:49,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:49,402 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 13807 transitions. [2021-03-10 21:26:49,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:49,405 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:49,405 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:49,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3301 [2021-03-10 21:26:49,605 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:49,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:49,605 INFO L82 PathProgramCache]: Analyzing trace with hash -80319194, now seen corresponding path program 104 times [2021-03-10 21:26:49,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:49,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863729995] [2021-03-10 21:26:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:49,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863729995] [2021-03-10 21:26:49,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102561186] [2021-03-10 21:26:49,666 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:49,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:49,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:49,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:49,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:49,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:49,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:26:49,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59514127] [2021-03-10 21:26:49,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:49,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:49,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:49,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:49,736 INFO L87 Difference]: Start difference. First operand 4093 states and 13807 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:49,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:49,897 INFO L93 Difference]: Finished difference Result 4713 states and 15274 transitions. [2021-03-10 21:26:49,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:26:49,897 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:26:49,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:49,902 INFO L225 Difference]: With dead ends: 4713 [2021-03-10 21:26:49,902 INFO L226 Difference]: Without dead ends: 4713 [2021-03-10 21:26:49,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:49,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2021-03-10 21:26:49,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 4207. [2021-03-10 21:26:49,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 3.378982406086543) internal successors, (14212), 4206 states have internal predecessors, (14212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 14212 transitions. [2021-03-10 21:26:49,954 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 14212 transitions. Word has length 20 [2021-03-10 21:26:49,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:49,954 INFO L480 AbstractCegarLoop]: Abstraction has 4207 states and 14212 transitions. [2021-03-10 21:26:49,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:49,954 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 14212 transitions. [2021-03-10 21:26:49,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:49,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:49,958 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:50,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3302,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:50,159 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:50,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:50,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1402815744, now seen corresponding path program 105 times [2021-03-10 21:26:50,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:50,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353826958] [2021-03-10 21:26:50,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:50,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353826958] [2021-03-10 21:26:50,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213262655] [2021-03-10 21:26:50,230 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:50,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:26:50,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:50,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:50,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:50,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:50,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:26:50,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704064206] [2021-03-10 21:26:50,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:50,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:50,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:50,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:50,304 INFO L87 Difference]: Start difference. First operand 4207 states and 14212 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:50,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:50,566 INFO L93 Difference]: Finished difference Result 5066 states and 16291 transitions. [2021-03-10 21:26:50,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:26:50,566 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:26:50,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:50,572 INFO L225 Difference]: With dead ends: 5066 [2021-03-10 21:26:50,572 INFO L226 Difference]: Without dead ends: 5066 [2021-03-10 21:26:50,572 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 233.4ms TimeCoverageRelationStatistics Valid=406, Invalid=784, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:26:50,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2021-03-10 21:26:50,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 4561. [2021-03-10 21:26:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4560 states have (on average 3.3802631578947366) internal successors, (15414), 4560 states have internal predecessors, (15414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:50,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 15414 transitions. [2021-03-10 21:26:50,649 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 15414 transitions. Word has length 20 [2021-03-10 21:26:50,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:50,649 INFO L480 AbstractCegarLoop]: Abstraction has 4561 states and 15414 transitions. [2021-03-10 21:26:50,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:50,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 15414 transitions. [2021-03-10 21:26:50,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:50,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:50,652 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:50,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3303,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:50,852 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:50,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:50,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1590980808, now seen corresponding path program 106 times [2021-03-10 21:26:50,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:50,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827313451] [2021-03-10 21:26:50,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:50,906 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:50,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827313451] [2021-03-10 21:26:50,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374282617] [2021-03-10 21:26:50,906 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:50,930 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:50,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:50,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:50,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:50,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:50,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:26:50,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151694610] [2021-03-10 21:26:50,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:26:50,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:50,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:26:50,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:26:50,967 INFO L87 Difference]: Start difference. First operand 4561 states and 15414 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:26:51,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:51,153 INFO L93 Difference]: Finished difference Result 5249 states and 17354 transitions. [2021-03-10 21:26:51,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:26:51,154 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 20 [2021-03-10 21:26:51,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:51,161 INFO L225 Difference]: With dead ends: 5249 [2021-03-10 21:26:51,161 INFO L226 Difference]: Without dead ends: 5245 [2021-03-10 21:26:51,162 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:51,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5245 states. [2021-03-10 21:26:51,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5245 to 4651. [2021-03-10 21:26:51,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 3.3821505376344088) internal successors, (15727), 4650 states have internal predecessors, (15727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:51,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 15727 transitions. [2021-03-10 21:26:51,238 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 15727 transitions. Word has length 20 [2021-03-10 21:26:51,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:51,238 INFO L480 AbstractCegarLoop]: Abstraction has 4651 states and 15727 transitions. [2021-03-10 21:26:51,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:26:51,238 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 15727 transitions. [2021-03-10 21:26:51,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:51,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:51,242 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:51,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3304,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:51,461 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:51,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:51,461 INFO L82 PathProgramCache]: Analyzing trace with hash 713013304, now seen corresponding path program 107 times [2021-03-10 21:26:51,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:51,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661491069] [2021-03-10 21:26:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:51,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661491069] [2021-03-10 21:26:51,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864331357] [2021-03-10 21:26:51,516 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:51,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:26:51,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:51,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:51,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:51,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:51,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:51,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499879969] [2021-03-10 21:26:51,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:51,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:51,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:51,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:51,571 INFO L87 Difference]: Start difference. First operand 4651 states and 15727 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:51,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:51,706 INFO L93 Difference]: Finished difference Result 5919 states and 19183 transitions. [2021-03-10 21:26:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:26:51,706 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:51,712 INFO L225 Difference]: With dead ends: 5919 [2021-03-10 21:26:51,713 INFO L226 Difference]: Without dead ends: 5919 [2021-03-10 21:26:51,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:51,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5919 states. [2021-03-10 21:26:51,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5919 to 5338. [2021-03-10 21:26:51,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 3.389357316844669) internal successors, (18089), 5337 states have internal predecessors, (18089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:51,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 18089 transitions. [2021-03-10 21:26:51,778 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 18089 transitions. Word has length 20 [2021-03-10 21:26:51,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:51,778 INFO L480 AbstractCegarLoop]: Abstraction has 5338 states and 18089 transitions. [2021-03-10 21:26:51,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:51,778 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 18089 transitions. [2021-03-10 21:26:51,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:51,781 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:51,781 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:51,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3305,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:51,982 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:51,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:51,982 INFO L82 PathProgramCache]: Analyzing trace with hash -2098819054, now seen corresponding path program 108 times [2021-03-10 21:26:51,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:51,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807641116] [2021-03-10 21:26:51,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:52,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807641116] [2021-03-10 21:26:52,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683708980] [2021-03-10 21:26:52,053 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:52,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:26:52,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:52,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:52,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:52,108 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:52,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:52,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:52,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727697001] [2021-03-10 21:26:52,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:52,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:52,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:52,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:52,109 INFO L87 Difference]: Start difference. First operand 5338 states and 18089 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:52,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:52,249 INFO L93 Difference]: Finished difference Result 6269 states and 20414 transitions. [2021-03-10 21:26:52,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:26:52,250 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:52,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:52,257 INFO L225 Difference]: With dead ends: 6269 [2021-03-10 21:26:52,257 INFO L226 Difference]: Without dead ends: 6269 [2021-03-10 21:26:52,257 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:52,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6269 states. [2021-03-10 21:26:52,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6269 to 4444. [2021-03-10 21:26:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4444 states, 4443 states have (on average 3.356290794508215) internal successors, (14912), 4443 states have internal predecessors, (14912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:52,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4444 states to 4444 states and 14912 transitions. [2021-03-10 21:26:52,315 INFO L78 Accepts]: Start accepts. Automaton has 4444 states and 14912 transitions. Word has length 20 [2021-03-10 21:26:52,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:52,315 INFO L480 AbstractCegarLoop]: Abstraction has 4444 states and 14912 transitions. [2021-03-10 21:26:52,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 4444 states and 14912 transitions. [2021-03-10 21:26:52,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:52,318 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:52,318 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:52,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3306 [2021-03-10 21:26:52,518 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:52,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:52,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1689801976, now seen corresponding path program 109 times [2021-03-10 21:26:52,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:52,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398924695] [2021-03-10 21:26:52,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:52,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398924695] [2021-03-10 21:26:52,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840273023] [2021-03-10 21:26:52,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:52,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:52,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:52,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:52,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:52,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700135430] [2021-03-10 21:26:52,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:52,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:52,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:52,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:52,635 INFO L87 Difference]: Start difference. First operand 4444 states and 14912 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:52,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:52,821 INFO L93 Difference]: Finished difference Result 5453 states and 17524 transitions. [2021-03-10 21:26:52,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:26:52,822 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:52,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:52,828 INFO L225 Difference]: With dead ends: 5453 [2021-03-10 21:26:52,828 INFO L226 Difference]: Without dead ends: 5453 [2021-03-10 21:26:52,828 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=278, Invalid=534, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:26:52,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2021-03-10 21:26:52,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 4957. [2021-03-10 21:26:52,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4956 states have (on average 3.3668280871670704) internal successors, (16686), 4956 states have internal predecessors, (16686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:52,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 16686 transitions. [2021-03-10 21:26:52,887 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 16686 transitions. Word has length 20 [2021-03-10 21:26:52,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:52,887 INFO L480 AbstractCegarLoop]: Abstraction has 4957 states and 16686 transitions. [2021-03-10 21:26:52,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:52,887 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 16686 transitions. [2021-03-10 21:26:52,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:52,892 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:52,892 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:53,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3307,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:53,111 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:53,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:53,111 INFO L82 PathProgramCache]: Analyzing trace with hash 928691064, now seen corresponding path program 110 times [2021-03-10 21:26:53,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:53,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619994144] [2021-03-10 21:26:53,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:53,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619994144] [2021-03-10 21:26:53,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268212133] [2021-03-10 21:26:53,167 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:53,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:53,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:53,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:53,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:53,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:53,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:26:53,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548004902] [2021-03-10 21:26:53,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:53,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:53,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:53,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:53,228 INFO L87 Difference]: Start difference. First operand 4957 states and 16686 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:53,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:53,374 INFO L93 Difference]: Finished difference Result 5535 states and 17962 transitions. [2021-03-10 21:26:53,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:26:53,375 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:26:53,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:53,380 INFO L225 Difference]: With dead ends: 5535 [2021-03-10 21:26:53,380 INFO L226 Difference]: Without dead ends: 5535 [2021-03-10 21:26:53,381 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:53,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2021-03-10 21:26:53,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 4104. [2021-03-10 21:26:53,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4104 states, 4103 states have (on average 3.3346331952230077) internal successors, (13682), 4103 states have internal predecessors, (13682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:53,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 13682 transitions. [2021-03-10 21:26:53,432 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 13682 transitions. Word has length 20 [2021-03-10 21:26:53,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:53,432 INFO L480 AbstractCegarLoop]: Abstraction has 4104 states and 13682 transitions. [2021-03-10 21:26:53,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:53,432 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 13682 transitions. [2021-03-10 21:26:53,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:53,435 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:53,435 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:53,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3308 [2021-03-10 21:26:53,639 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:53,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:53,639 INFO L82 PathProgramCache]: Analyzing trace with hash 422344798, now seen corresponding path program 111 times [2021-03-10 21:26:53,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:53,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046702426] [2021-03-10 21:26:53,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:53,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046702426] [2021-03-10 21:26:53,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778791009] [2021-03-10 21:26:53,705 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:26:53,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:26:53,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:53,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:53,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:53,788 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:53,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:53,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:26:53,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387296236] [2021-03-10 21:26:53,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:53,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:53,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:53,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:53,789 INFO L87 Difference]: Start difference. First operand 4104 states and 13682 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:53,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:53,998 INFO L93 Difference]: Finished difference Result 4959 states and 15903 transitions. [2021-03-10 21:26:53,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:26:53,998 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:26:53,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:54,007 INFO L225 Difference]: With dead ends: 4959 [2021-03-10 21:26:54,007 INFO L226 Difference]: Without dead ends: 4959 [2021-03-10 21:26:54,008 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=235, Invalid=467, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:54,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2021-03-10 21:26:54,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 3875. [2021-03-10 21:26:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3874 states have (on average 3.3304078471863705) internal successors, (12902), 3874 states have internal predecessors, (12902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:54,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 12902 transitions. [2021-03-10 21:26:54,081 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 12902 transitions. Word has length 20 [2021-03-10 21:26:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:54,081 INFO L480 AbstractCegarLoop]: Abstraction has 3875 states and 12902 transitions. [2021-03-10 21:26:54,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:54,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 12902 transitions. [2021-03-10 21:26:54,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:54,084 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:54,084 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:54,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3309 [2021-03-10 21:26:54,301 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:54,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:54,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1905479736, now seen corresponding path program 112 times [2021-03-10 21:26:54,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:54,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99323189] [2021-03-10 21:26:54,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:54,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99323189] [2021-03-10 21:26:54,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398203110] [2021-03-10 21:26:54,362 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:54,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:54,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:54,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:54,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:54,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:54,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:26:54,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801065769] [2021-03-10 21:26:54,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:54,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:54,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:54,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:54,445 INFO L87 Difference]: Start difference. First operand 3875 states and 12902 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:54,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:54,693 INFO L93 Difference]: Finished difference Result 4630 states and 14540 transitions. [2021-03-10 21:26:54,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:26:54,693 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:26:54,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:54,698 INFO L225 Difference]: With dead ends: 4630 [2021-03-10 21:26:54,698 INFO L226 Difference]: Without dead ends: 4630 [2021-03-10 21:26:54,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 214.7ms TimeCoverageRelationStatistics Valid=405, Invalid=785, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:26:54,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4630 states. [2021-03-10 21:26:54,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4630 to 3885. [2021-03-10 21:26:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3884 states have (on average 3.33264675592173) internal successors, (12944), 3884 states have internal predecessors, (12944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 12944 transitions. [2021-03-10 21:26:54,741 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 12944 transitions. Word has length 20 [2021-03-10 21:26:54,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:54,741 INFO L480 AbstractCegarLoop]: Abstraction has 3885 states and 12944 transitions. [2021-03-10 21:26:54,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:54,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 12944 transitions. [2021-03-10 21:26:54,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:54,743 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:54,744 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:54,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3310,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:54,964 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:54,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:54,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1965054858, now seen corresponding path program 113 times [2021-03-10 21:26:54,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:54,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457759201] [2021-03-10 21:26:54,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:55,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457759201] [2021-03-10 21:26:55,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426084532] [2021-03-10 21:26:55,021 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:55,046 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:26:55,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:55,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:55,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:55,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:55,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:55,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043182700] [2021-03-10 21:26:55,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:55,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:55,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:55,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:55,082 INFO L87 Difference]: Start difference. First operand 3885 states and 12944 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:55,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:55,214 INFO L93 Difference]: Finished difference Result 4118 states and 13256 transitions. [2021-03-10 21:26:55,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:26:55,215 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:55,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:55,219 INFO L225 Difference]: With dead ends: 4118 [2021-03-10 21:26:55,219 INFO L226 Difference]: Without dead ends: 4114 [2021-03-10 21:26:55,219 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:26:55,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4114 states. [2021-03-10 21:26:55,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4114 to 3838. [2021-03-10 21:26:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 3.3281209278081834) internal successors, (12770), 3837 states have internal predecessors, (12770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 12770 transitions. [2021-03-10 21:26:55,261 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 12770 transitions. Word has length 20 [2021-03-10 21:26:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:55,261 INFO L480 AbstractCegarLoop]: Abstraction has 3838 states and 12770 transitions. [2021-03-10 21:26:55,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:55,261 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 12770 transitions. [2021-03-10 21:26:55,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:55,263 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:55,263 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:55,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3311,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:55,464 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:55,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:55,464 INFO L82 PathProgramCache]: Analyzing trace with hash -750691528, now seen corresponding path program 114 times [2021-03-10 21:26:55,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:55,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099943417] [2021-03-10 21:26:55,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:55,512 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:55,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099943417] [2021-03-10 21:26:55,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237229125] [2021-03-10 21:26:55,513 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:55,532 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:26:55,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:55,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:55,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:55,569 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:55,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:55,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:55,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244269300] [2021-03-10 21:26:55,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:55,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:55,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:55,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:55,570 INFO L87 Difference]: Start difference. First operand 3838 states and 12770 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:55,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:55,642 INFO L93 Difference]: Finished difference Result 4108 states and 13151 transitions. [2021-03-10 21:26:55,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:26:55,642 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:55,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:55,646 INFO L225 Difference]: With dead ends: 4108 [2021-03-10 21:26:55,646 INFO L226 Difference]: Without dead ends: 4108 [2021-03-10 21:26:55,646 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:55,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2021-03-10 21:26:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 3833. [2021-03-10 21:26:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 3.325678496868476) internal successors, (12744), 3832 states have internal predecessors, (12744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:55,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 12744 transitions. [2021-03-10 21:26:55,690 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 12744 transitions. Word has length 20 [2021-03-10 21:26:55,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:55,690 INFO L480 AbstractCegarLoop]: Abstraction has 3833 states and 12744 transitions. [2021-03-10 21:26:55,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:55,690 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 12744 transitions. [2021-03-10 21:26:55,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:55,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:55,693 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:55,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3312,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:55,894 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:55,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:55,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1815228434, now seen corresponding path program 115 times [2021-03-10 21:26:55,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:55,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457466321] [2021-03-10 21:26:55,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:55,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:55,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457466321] [2021-03-10 21:26:55,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513646903] [2021-03-10 21:26:55,954 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:55,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:55,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:56,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:56,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:26:56,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314787158] [2021-03-10 21:26:56,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:56,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:56,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:56,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:56,016 INFO L87 Difference]: Start difference. First operand 3833 states and 12744 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:56,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:56,106 INFO L93 Difference]: Finished difference Result 4122 states and 13177 transitions. [2021-03-10 21:26:56,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:26:56,106 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:56,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:56,110 INFO L225 Difference]: With dead ends: 4122 [2021-03-10 21:26:56,110 INFO L226 Difference]: Without dead ends: 4122 [2021-03-10 21:26:56,110 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:26:56,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2021-03-10 21:26:56,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 3834. [2021-03-10 21:26:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3834 states, 3833 states have (on average 3.3229846073571614) internal successors, (12737), 3833 states have internal predecessors, (12737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:56,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3834 states to 3834 states and 12737 transitions. [2021-03-10 21:26:56,169 INFO L78 Accepts]: Start accepts. Automaton has 3834 states and 12737 transitions. Word has length 20 [2021-03-10 21:26:56,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:56,169 INFO L480 AbstractCegarLoop]: Abstraction has 3834 states and 12737 transitions. [2021-03-10 21:26:56,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3834 states and 12737 transitions. [2021-03-10 21:26:56,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:56,171 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:56,171 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:56,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3313,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:56,372 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:56,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:56,372 INFO L82 PathProgramCache]: Analyzing trace with hash -245631368, now seen corresponding path program 116 times [2021-03-10 21:26:56,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:56,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034143535] [2021-03-10 21:26:56,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:56,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:56,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034143535] [2021-03-10 21:26:56,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014437396] [2021-03-10 21:26:56,424 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:56,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:56,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:56,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:56,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:56,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:56,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:26:56,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476570409] [2021-03-10 21:26:56,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:56,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:56,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:56,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:56,487 INFO L87 Difference]: Start difference. First operand 3834 states and 12737 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:56,560 INFO L93 Difference]: Finished difference Result 5426 states and 17609 transitions. [2021-03-10 21:26:56,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:26:56,561 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:26:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:56,566 INFO L225 Difference]: With dead ends: 5426 [2021-03-10 21:26:56,566 INFO L226 Difference]: Without dead ends: 5426 [2021-03-10 21:26:56,567 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:56,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-03-10 21:26:56,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 5130. [2021-03-10 21:26:56,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5130 states, 5129 states have (on average 3.3450965100409435) internal successors, (17157), 5129 states have internal predecessors, (17157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:56,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 17157 transitions. [2021-03-10 21:26:56,624 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 17157 transitions. Word has length 20 [2021-03-10 21:26:56,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:56,624 INFO L480 AbstractCegarLoop]: Abstraction has 5130 states and 17157 transitions. [2021-03-10 21:26:56,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:26:56,624 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 17157 transitions. [2021-03-10 21:26:56,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:56,627 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:56,627 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:56,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3314,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:56,827 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:56,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:56,827 INFO L82 PathProgramCache]: Analyzing trace with hash 292224210, now seen corresponding path program 117 times [2021-03-10 21:26:56,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:56,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035602759] [2021-03-10 21:26:56,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:56,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035602759] [2021-03-10 21:26:56,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662921832] [2021-03-10 21:26:56,895 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:26:56,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:26:56,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:56,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:56,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:56,982 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:56,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:56,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:26:56,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724700574] [2021-03-10 21:26:56,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:56,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:56,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:56,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:56,983 INFO L87 Difference]: Start difference. First operand 5130 states and 17157 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:57,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:57,130 INFO L93 Difference]: Finished difference Result 5508 states and 17780 transitions. [2021-03-10 21:26:57,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:57,131 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:26:57,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:57,140 INFO L225 Difference]: With dead ends: 5508 [2021-03-10 21:26:57,140 INFO L226 Difference]: Without dead ends: 5508 [2021-03-10 21:26:57,140 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:26:57,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2021-03-10 21:26:57,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 5142. [2021-03-10 21:26:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5142 states, 5141 states have (on average 3.3433184205407507) internal successors, (17188), 5141 states have internal predecessors, (17188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:57,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5142 states to 5142 states and 17188 transitions. [2021-03-10 21:26:57,209 INFO L78 Accepts]: Start accepts. Automaton has 5142 states and 17188 transitions. Word has length 20 [2021-03-10 21:26:57,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:57,209 INFO L480 AbstractCegarLoop]: Abstraction has 5142 states and 17188 transitions. [2021-03-10 21:26:57,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:57,209 INFO L276 IsEmpty]: Start isEmpty. Operand 5142 states and 17188 transitions. [2021-03-10 21:26:57,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:57,213 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:57,213 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:57,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3315 [2021-03-10 21:26:57,413 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:57,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:57,414 INFO L82 PathProgramCache]: Analyzing trace with hash -214122056, now seen corresponding path program 118 times [2021-03-10 21:26:57,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:57,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639359287] [2021-03-10 21:26:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:57,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639359287] [2021-03-10 21:26:57,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999067569] [2021-03-10 21:26:57,472 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:57,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:57,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:57,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:57,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:57,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:57,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:26:57,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591837242] [2021-03-10 21:26:57,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:57,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:57,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:57,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:57,533 INFO L87 Difference]: Start difference. First operand 5142 states and 17188 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:57,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:57,651 INFO L93 Difference]: Finished difference Result 5808 states and 18946 transitions. [2021-03-10 21:26:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:57,652 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:26:57,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:57,658 INFO L225 Difference]: With dead ends: 5808 [2021-03-10 21:26:57,658 INFO L226 Difference]: Without dead ends: 5808 [2021-03-10 21:26:57,658 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 111.9ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:57,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2021-03-10 21:26:57,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 5576. [2021-03-10 21:26:57,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5576 states, 5575 states have (on average 3.337219730941704) internal successors, (18605), 5575 states have internal predecessors, (18605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:57,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5576 states to 5576 states and 18605 transitions. [2021-03-10 21:26:57,719 INFO L78 Accepts]: Start accepts. Automaton has 5576 states and 18605 transitions. Word has length 20 [2021-03-10 21:26:57,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:57,719 INFO L480 AbstractCegarLoop]: Abstraction has 5576 states and 18605 transitions. [2021-03-10 21:26:57,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:57,719 INFO L276 IsEmpty]: Start isEmpty. Operand 5576 states and 18605 transitions. [2021-03-10 21:26:57,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:57,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:57,723 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:57,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3316,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:57,944 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:57,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:57,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1269012882, now seen corresponding path program 119 times [2021-03-10 21:26:57,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:57,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426316367] [2021-03-10 21:26:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:58,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426316367] [2021-03-10 21:26:58,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036419993] [2021-03-10 21:26:58,007 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:58,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:26:58,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:58,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:58,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:58,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:58,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:26:58,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736186742] [2021-03-10 21:26:58,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:58,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:58,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:58,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:58,070 INFO L87 Difference]: Start difference. First operand 5576 states and 18605 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:58,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:58,299 INFO L93 Difference]: Finished difference Result 6051 states and 19578 transitions. [2021-03-10 21:26:58,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:26:58,299 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:26:58,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:58,306 INFO L225 Difference]: With dead ends: 6051 [2021-03-10 21:26:58,306 INFO L226 Difference]: Without dead ends: 6051 [2021-03-10 21:26:58,306 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:26:58,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6051 states. [2021-03-10 21:26:58,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6051 to 5723. [2021-03-10 21:26:58,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5723 states, 5722 states have (on average 3.3318769660957708) internal successors, (19065), 5722 states have internal predecessors, (19065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 19065 transitions. [2021-03-10 21:26:58,369 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 19065 transitions. Word has length 20 [2021-03-10 21:26:58,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:58,369 INFO L480 AbstractCegarLoop]: Abstraction has 5723 states and 19065 transitions. [2021-03-10 21:26:58,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 19065 transitions. [2021-03-10 21:26:58,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:58,373 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:58,373 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:58,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3317,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:58,573 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:58,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:58,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1555704, now seen corresponding path program 120 times [2021-03-10 21:26:58,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:58,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114516516] [2021-03-10 21:26:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:58,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:58,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114516516] [2021-03-10 21:26:58,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309272471] [2021-03-10 21:26:58,639 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:58,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:26:58,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:58,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:58,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:58,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:58,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:26:58,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050308178] [2021-03-10 21:26:58,702 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:58,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:58,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:58,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:58,702 INFO L87 Difference]: Start difference. First operand 5723 states and 19065 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:59,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:59,005 INFO L93 Difference]: Finished difference Result 6305 states and 20268 transitions. [2021-03-10 21:26:59,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:26:59,005 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:26:59,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:59,012 INFO L225 Difference]: With dead ends: 6305 [2021-03-10 21:26:59,012 INFO L226 Difference]: Without dead ends: 6305 [2021-03-10 21:26:59,012 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 272.9ms TimeCoverageRelationStatistics Valid=471, Invalid=935, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:26:59,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2021-03-10 21:26:59,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 5812. [2021-03-10 21:26:59,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5812 states, 5811 states have (on average 3.3271381861985887) internal successors, (19334), 5811 states have internal predecessors, (19334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:59,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5812 states to 5812 states and 19334 transitions. [2021-03-10 21:26:59,076 INFO L78 Accepts]: Start accepts. Automaton has 5812 states and 19334 transitions. Word has length 20 [2021-03-10 21:26:59,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:59,076 INFO L480 AbstractCegarLoop]: Abstraction has 5812 states and 19334 transitions. [2021-03-10 21:26:59,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:26:59,076 INFO L276 IsEmpty]: Start isEmpty. Operand 5812 states and 19334 transitions. [2021-03-10 21:26:59,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:59,079 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:59,079 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:59,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3318 [2021-03-10 21:26:59,280 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:59,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:59,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1106701056, now seen corresponding path program 121 times [2021-03-10 21:26:59,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:59,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61682163] [2021-03-10 21:26:59,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:59,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61682163] [2021-03-10 21:26:59,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327172414] [2021-03-10 21:26:59,338 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:59,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:59,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:59,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:59,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:59,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906155384] [2021-03-10 21:26:59,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:59,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:59,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:59,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:59,388 INFO L87 Difference]: Start difference. First operand 5812 states and 19334 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:59,576 INFO L93 Difference]: Finished difference Result 6089 states and 19769 transitions. [2021-03-10 21:26:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:26:59,577 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:26:59,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:59,584 INFO L225 Difference]: With dead ends: 6089 [2021-03-10 21:26:59,584 INFO L226 Difference]: Without dead ends: 6085 [2021-03-10 21:26:59,584 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 131.2ms TimeCoverageRelationStatistics Valid=207, Invalid=393, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:26:59,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2021-03-10 21:26:59,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 5545. [2021-03-10 21:26:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5545 states, 5544 states have (on average 3.3145743145743145) internal successors, (18376), 5544 states have internal predecessors, (18376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5545 states to 5545 states and 18376 transitions. [2021-03-10 21:26:59,648 INFO L78 Accepts]: Start accepts. Automaton has 5545 states and 18376 transitions. Word has length 20 [2021-03-10 21:26:59,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:59,648 INFO L480 AbstractCegarLoop]: Abstraction has 5545 states and 18376 transitions. [2021-03-10 21:26:59,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:59,648 INFO L276 IsEmpty]: Start isEmpty. Operand 5545 states and 18376 transitions. [2021-03-10 21:26:59,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:26:59,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:59,652 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:59,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3319,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:59,855 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:59,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:59,855 INFO L82 PathProgramCache]: Analyzing trace with hash 92516544, now seen corresponding path program 122 times [2021-03-10 21:26:59,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:59,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55330510] [2021-03-10 21:26:59,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:59,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:59,918 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:59,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55330510] [2021-03-10 21:26:59,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519006128] [2021-03-10 21:26:59,919 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:59,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:59,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:59,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:26:59,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:59,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:59,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:59,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132747146] [2021-03-10 21:26:59,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:59,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:59,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:59,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:59,995 INFO L87 Difference]: Start difference. First operand 5545 states and 18376 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:27:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:00,195 INFO L93 Difference]: Finished difference Result 7476 states and 23877 transitions. [2021-03-10 21:27:00,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:27:00,197 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:27:00,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:00,207 INFO L225 Difference]: With dead ends: 7476 [2021-03-10 21:27:00,207 INFO L226 Difference]: Without dead ends: 7476 [2021-03-10 21:27:00,207 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 171.9ms TimeCoverageRelationStatistics Valid=277, Invalid=535, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:27:00,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2021-03-10 21:27:00,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 6757. [2021-03-10 21:27:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6757 states, 6756 states have (on average 3.312314979277679) internal successors, (22378), 6756 states have internal predecessors, (22378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:00,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6757 states to 6757 states and 22378 transitions. [2021-03-10 21:27:00,287 INFO L78 Accepts]: Start accepts. Automaton has 6757 states and 22378 transitions. Word has length 20 [2021-03-10 21:27:00,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:00,287 INFO L480 AbstractCegarLoop]: Abstraction has 6757 states and 22378 transitions. [2021-03-10 21:27:00,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:27:00,288 INFO L276 IsEmpty]: Start isEmpty. Operand 6757 states and 22378 transitions. [2021-03-10 21:27:00,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:00,291 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:00,291 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:00,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3320 [2021-03-10 21:27:00,492 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:00,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:00,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1174940634, now seen corresponding path program 123 times [2021-03-10 21:27:00,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:00,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049583806] [2021-03-10 21:27:00,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:00,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049583806] [2021-03-10 21:27:00,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154385345] [2021-03-10 21:27:00,548 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:00,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:27:00,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:00,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:00,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:00,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:00,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:00,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113498460] [2021-03-10 21:27:00,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:00,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:00,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:00,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:00,611 INFO L87 Difference]: Start difference. First operand 6757 states and 22378 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:00,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:00,800 INFO L93 Difference]: Finished difference Result 7967 states and 25615 transitions. [2021-03-10 21:27:00,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:27:00,800 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:27:00,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:00,809 INFO L225 Difference]: With dead ends: 7967 [2021-03-10 21:27:00,809 INFO L226 Difference]: Without dead ends: 7967 [2021-03-10 21:27:00,809 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 161.4ms TimeCoverageRelationStatistics Valid=282, Invalid=530, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:27:00,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7967 states. [2021-03-10 21:27:00,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7967 to 5441. [2021-03-10 21:27:00,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5441 states, 5440 states have (on average 3.2928308823529413) internal successors, (17913), 5440 states have internal predecessors, (17913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:00,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5441 states to 5441 states and 17913 transitions. [2021-03-10 21:27:00,880 INFO L78 Accepts]: Start accepts. Automaton has 5441 states and 17913 transitions. Word has length 20 [2021-03-10 21:27:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:00,880 INFO L480 AbstractCegarLoop]: Abstraction has 5441 states and 17913 transitions. [2021-03-10 21:27:00,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:00,880 INFO L276 IsEmpty]: Start isEmpty. Operand 5441 states and 17913 transitions. [2021-03-10 21:27:00,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:00,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:00,884 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:01,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3321,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:01,085 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:01,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:01,085 INFO L82 PathProgramCache]: Analyzing trace with hash 308194304, now seen corresponding path program 124 times [2021-03-10 21:27:01,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:01,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645182200] [2021-03-10 21:27:01,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:01,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645182200] [2021-03-10 21:27:01,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888598833] [2021-03-10 21:27:01,158 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:27:01,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:01,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:01,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:01,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:01,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:01,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:01,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796501362] [2021-03-10 21:27:01,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:01,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:01,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:01,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:01,241 INFO L87 Difference]: Start difference. First operand 5441 states and 17913 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:01,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:01,604 INFO L93 Difference]: Finished difference Result 6867 states and 21677 transitions. [2021-03-10 21:27:01,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:27:01,605 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:27:01,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:01,618 INFO L225 Difference]: With dead ends: 6867 [2021-03-10 21:27:01,618 INFO L226 Difference]: Without dead ends: 6867 [2021-03-10 21:27:01,620 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 301.5ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:27:01,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6867 states. [2021-03-10 21:27:01,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6867 to 5507. [2021-03-10 21:27:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5507 states, 5506 states have (on average 3.2944061024337086) internal successors, (18139), 5506 states have internal predecessors, (18139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:01,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5507 states to 5507 states and 18139 transitions. [2021-03-10 21:27:01,702 INFO L78 Accepts]: Start accepts. Automaton has 5507 states and 18139 transitions. Word has length 20 [2021-03-10 21:27:01,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:01,702 INFO L480 AbstractCegarLoop]: Abstraction has 5507 states and 18139 transitions. [2021-03-10 21:27:01,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:01,702 INFO L276 IsEmpty]: Start isEmpty. Operand 5507 states and 18139 transitions. [2021-03-10 21:27:01,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:01,705 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:01,705 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:01,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3322,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:01,911 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:01,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:01,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1811407488, now seen corresponding path program 125 times [2021-03-10 21:27:01,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:01,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468770163] [2021-03-10 21:27:01,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:01,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468770163] [2021-03-10 21:27:01,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177926361] [2021-03-10 21:27:01,970 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:01,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:27:01,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:01,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:01,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:02,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:02,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:02,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448963752] [2021-03-10 21:27:02,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:02,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:02,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:02,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:02,065 INFO L87 Difference]: Start difference. First operand 5507 states and 18139 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:02,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:02,226 INFO L93 Difference]: Finished difference Result 6222 states and 19873 transitions. [2021-03-10 21:27:02,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:27:02,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:27:02,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:02,234 INFO L225 Difference]: With dead ends: 6222 [2021-03-10 21:27:02,234 INFO L226 Difference]: Without dead ends: 6222 [2021-03-10 21:27:02,234 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:27:02,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6222 states. [2021-03-10 21:27:02,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6222 to 5437. [2021-03-10 21:27:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5437 states, 5436 states have (on average 3.3015084621044886) internal successors, (17947), 5436 states have internal predecessors, (17947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:02,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5437 states to 5437 states and 17947 transitions. [2021-03-10 21:27:02,300 INFO L78 Accepts]: Start accepts. Automaton has 5437 states and 17947 transitions. Word has length 20 [2021-03-10 21:27:02,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:02,300 INFO L480 AbstractCegarLoop]: Abstraction has 5437 states and 17947 transitions. [2021-03-10 21:27:02,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:02,300 INFO L276 IsEmpty]: Start isEmpty. Operand 5437 states and 17947 transitions. [2021-03-10 21:27:02,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:02,303 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:02,304 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:02,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3323,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:02,504 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:02,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:02,504 INFO L82 PathProgramCache]: Analyzing trace with hash -328272550, now seen corresponding path program 126 times [2021-03-10 21:27:02,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:02,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437744522] [2021-03-10 21:27:02,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:02,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:02,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437744522] [2021-03-10 21:27:02,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144362355] [2021-03-10 21:27:02,568 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:02,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:27:02,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:02,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:02,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:02,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:02,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:02,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964961842] [2021-03-10 21:27:02,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:02,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:02,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:02,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:02,631 INFO L87 Difference]: Start difference. First operand 5437 states and 17947 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:02,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:02,835 INFO L93 Difference]: Finished difference Result 5885 states and 18864 transitions. [2021-03-10 21:27:02,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:27:02,836 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:27:02,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:02,842 INFO L225 Difference]: With dead ends: 5885 [2021-03-10 21:27:02,842 INFO L226 Difference]: Without dead ends: 5885 [2021-03-10 21:27:02,842 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=305, Invalid=625, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:27:02,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5885 states. [2021-03-10 21:27:02,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5885 to 5474. [2021-03-10 21:27:02,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5474 states, 5473 states have (on average 3.3012972775443084) internal successors, (18068), 5473 states have internal predecessors, (18068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:02,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5474 states to 5474 states and 18068 transitions. [2021-03-10 21:27:02,901 INFO L78 Accepts]: Start accepts. Automaton has 5474 states and 18068 transitions. Word has length 20 [2021-03-10 21:27:02,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:02,901 INFO L480 AbstractCegarLoop]: Abstraction has 5474 states and 18068 transitions. [2021-03-10 21:27:02,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:02,901 INFO L276 IsEmpty]: Start isEmpty. Operand 5474 states and 18068 transitions. [2021-03-10 21:27:02,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:02,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:02,905 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:03,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3324,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:03,105 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:03,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:03,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1595729728, now seen corresponding path program 127 times [2021-03-10 21:27:03,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:03,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158538436] [2021-03-10 21:27:03,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:03,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:03,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:03,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158538436] [2021-03-10 21:27:03,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282229266] [2021-03-10 21:27:03,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:03,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:03,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:03,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:03,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:03,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725400646] [2021-03-10 21:27:03,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:03,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:03,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:03,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:03,258 INFO L87 Difference]: Start difference. First operand 5474 states and 18068 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:03,537 INFO L93 Difference]: Finished difference Result 6017 states and 19173 transitions. [2021-03-10 21:27:03,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:27:03,537 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:27:03,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:03,543 INFO L225 Difference]: With dead ends: 6017 [2021-03-10 21:27:03,543 INFO L226 Difference]: Without dead ends: 6017 [2021-03-10 21:27:03,543 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=470, Invalid=936, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:27:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6017 states. [2021-03-10 21:27:03,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6017 to 5473. [2021-03-10 21:27:03,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5473 states, 5472 states have (on average 3.30171783625731) internal successors, (18067), 5472 states have internal predecessors, (18067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5473 states to 5473 states and 18067 transitions. [2021-03-10 21:27:03,604 INFO L78 Accepts]: Start accepts. Automaton has 5473 states and 18067 transitions. Word has length 20 [2021-03-10 21:27:03,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:03,604 INFO L480 AbstractCegarLoop]: Abstraction has 5473 states and 18067 transitions. [2021-03-10 21:27:03,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:03,604 INFO L276 IsEmpty]: Start isEmpty. Operand 5473 states and 18067 transitions. [2021-03-10 21:27:03,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:03,607 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:03,607 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:03,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3325,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:03,808 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:03,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:03,808 INFO L82 PathProgramCache]: Analyzing trace with hash 2112133432, now seen corresponding path program 128 times [2021-03-10 21:27:03,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:03,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043628601] [2021-03-10 21:27:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:03,859 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:03,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043628601] [2021-03-10 21:27:03,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863574593] [2021-03-10 21:27:03,859 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:03,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:03,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:03,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:03,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:03,909 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:03,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:03,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:27:03,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907277937] [2021-03-10 21:27:03,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:27:03,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:03,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:27:03,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:27:03,910 INFO L87 Difference]: Start difference. First operand 5473 states and 18067 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:04,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:04,084 INFO L93 Difference]: Finished difference Result 5764 states and 18581 transitions. [2021-03-10 21:27:04,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:27:04,085 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:27:04,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:04,091 INFO L225 Difference]: With dead ends: 5764 [2021-03-10 21:27:04,091 INFO L226 Difference]: Without dead ends: 5760 [2021-03-10 21:27:04,091 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 100.6ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:27:04,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5760 states. [2021-03-10 21:27:04,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5760 to 5552. [2021-03-10 21:27:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5552 states, 5551 states have (on average 3.301747432894974) internal successors, (18328), 5551 states have internal predecessors, (18328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:04,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5552 states to 5552 states and 18328 transitions. [2021-03-10 21:27:04,148 INFO L78 Accepts]: Start accepts. Automaton has 5552 states and 18328 transitions. Word has length 20 [2021-03-10 21:27:04,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:04,148 INFO L480 AbstractCegarLoop]: Abstraction has 5552 states and 18328 transitions. [2021-03-10 21:27:04,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:04,148 INFO L276 IsEmpty]: Start isEmpty. Operand 5552 states and 18328 transitions. [2021-03-10 21:27:04,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:04,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:04,151 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:04,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3326,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:04,359 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:04,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:04,359 INFO L82 PathProgramCache]: Analyzing trace with hash -603612954, now seen corresponding path program 129 times [2021-03-10 21:27:04,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:04,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360336491] [2021-03-10 21:27:04,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:04,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360336491] [2021-03-10 21:27:04,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762260431] [2021-03-10 21:27:04,411 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:04,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:27:04,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:04,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:04,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:04,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:04,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:27:04,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990000066] [2021-03-10 21:27:04,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:27:04,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:04,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:27:04,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:27:04,467 INFO L87 Difference]: Start difference. First operand 5552 states and 18328 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:04,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:04,552 INFO L93 Difference]: Finished difference Result 5872 states and 18869 transitions. [2021-03-10 21:27:04,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:27:04,553 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:27:04,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:04,558 INFO L225 Difference]: With dead ends: 5872 [2021-03-10 21:27:04,559 INFO L226 Difference]: Without dead ends: 5872 [2021-03-10 21:27:04,559 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:27:04,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5872 states. [2021-03-10 21:27:04,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5872 to 5560. [2021-03-10 21:27:04,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 3.300593631948192) internal successors, (18348), 5559 states have internal predecessors, (18348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:04,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 18348 transitions. [2021-03-10 21:27:04,621 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 18348 transitions. Word has length 20 [2021-03-10 21:27:04,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:04,621 INFO L480 AbstractCegarLoop]: Abstraction has 5560 states and 18348 transitions. [2021-03-10 21:27:04,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:04,621 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 18348 transitions. [2021-03-10 21:27:04,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:04,625 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:04,625 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:04,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3327,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:04,825 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:04,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:04,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1962307008, now seen corresponding path program 130 times [2021-03-10 21:27:04,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:04,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420767219] [2021-03-10 21:27:04,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:04,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420767219] [2021-03-10 21:27:04,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993336928] [2021-03-10 21:27:04,881 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:04,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:04,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:04,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:04,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:04,941 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:04,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:04,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:27:04,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606612918] [2021-03-10 21:27:04,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:04,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:04,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:04,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:04,942 INFO L87 Difference]: Start difference. First operand 5560 states and 18348 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:27:05,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:05,052 INFO L93 Difference]: Finished difference Result 5951 states and 19077 transitions. [2021-03-10 21:27:05,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:27:05,052 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:27:05,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:05,058 INFO L225 Difference]: With dead ends: 5951 [2021-03-10 21:27:05,058 INFO L226 Difference]: Without dead ends: 5951 [2021-03-10 21:27:05,059 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:27:05,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2021-03-10 21:27:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 5587. [2021-03-10 21:27:05,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5587 states, 5586 states have (on average 3.2986036519871105) internal successors, (18426), 5586 states have internal predecessors, (18426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 18426 transitions. [2021-03-10 21:27:05,119 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 18426 transitions. Word has length 20 [2021-03-10 21:27:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:05,119 INFO L480 AbstractCegarLoop]: Abstraction has 5587 states and 18426 transitions. [2021-03-10 21:27:05,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:27:05,119 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 18426 transitions. [2021-03-10 21:27:05,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:05,123 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:05,123 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:05,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3328,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:05,323 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:05,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:05,323 INFO L82 PathProgramCache]: Analyzing trace with hash -98552794, now seen corresponding path program 131 times [2021-03-10 21:27:05,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:05,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339193091] [2021-03-10 21:27:05,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:05,373 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:05,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339193091] [2021-03-10 21:27:05,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244749353] [2021-03-10 21:27:05,373 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:05,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:27:05,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:05,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:05,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:05,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:05,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:05,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:27:05,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809827882] [2021-03-10 21:27:05,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:05,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:05,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:05,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:05,435 INFO L87 Difference]: Start difference. First operand 5587 states and 18426 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:27:05,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:05,540 INFO L93 Difference]: Finished difference Result 7442 states and 23969 transitions. [2021-03-10 21:27:05,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:27:05,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:27:05,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:05,549 INFO L225 Difference]: With dead ends: 7442 [2021-03-10 21:27:05,549 INFO L226 Difference]: Without dead ends: 7442 [2021-03-10 21:27:05,549 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:27:05,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7442 states. [2021-03-10 21:27:05,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7442 to 7001. [2021-03-10 21:27:05,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7001 states, 7000 states have (on average 3.3085714285714287) internal successors, (23160), 7000 states have internal predecessors, (23160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7001 states to 7001 states and 23160 transitions. [2021-03-10 21:27:05,630 INFO L78 Accepts]: Start accepts. Automaton has 7001 states and 23160 transitions. Word has length 20 [2021-03-10 21:27:05,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:05,630 INFO L480 AbstractCegarLoop]: Abstraction has 7001 states and 23160 transitions. [2021-03-10 21:27:05,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:27:05,630 INFO L276 IsEmpty]: Start isEmpty. Operand 7001 states and 23160 transitions. [2021-03-10 21:27:05,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:05,634 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:05,634 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:05,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3329 [2021-03-10 21:27:05,834 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:05,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:05,835 INFO L82 PathProgramCache]: Analyzing trace with hash 439302784, now seen corresponding path program 132 times [2021-03-10 21:27:05,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:05,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661734691] [2021-03-10 21:27:05,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:05,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661734691] [2021-03-10 21:27:05,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691610804] [2021-03-10 21:27:05,887 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:05,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:27:05,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:05,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:05,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:05,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:05,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:27:05,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014499790] [2021-03-10 21:27:05,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:05,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:05,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:05,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:05,954 INFO L87 Difference]: Start difference. First operand 7001 states and 23160 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:27:06,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:06,038 INFO L93 Difference]: Finished difference Result 7460 states and 24267 transitions. [2021-03-10 21:27:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:27:06,039 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 20 [2021-03-10 21:27:06,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:06,047 INFO L225 Difference]: With dead ends: 7460 [2021-03-10 21:27:06,047 INFO L226 Difference]: Without dead ends: 7460 [2021-03-10 21:27:06,047 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:27:06,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7460 states. [2021-03-10 21:27:06,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7460 to 7283. [2021-03-10 21:27:06,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7283 states, 7282 states have (on average 3.300466904696512) internal successors, (24034), 7282 states have internal predecessors, (24034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:06,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7283 states to 7283 states and 24034 transitions. [2021-03-10 21:27:06,132 INFO L78 Accepts]: Start accepts. Automaton has 7283 states and 24034 transitions. Word has length 20 [2021-03-10 21:27:06,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:06,132 INFO L480 AbstractCegarLoop]: Abstraction has 7283 states and 24034 transitions. [2021-03-10 21:27:06,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:27:06,132 INFO L276 IsEmpty]: Start isEmpty. Operand 7283 states and 24034 transitions. [2021-03-10 21:27:06,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:06,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:06,136 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:06,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3330 [2021-03-10 21:27:06,336 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:06,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:06,337 INFO L82 PathProgramCache]: Analyzing trace with hash -67043482, now seen corresponding path program 133 times [2021-03-10 21:27:06,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:06,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439252130] [2021-03-10 21:27:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:06,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439252130] [2021-03-10 21:27:06,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663854309] [2021-03-10 21:27:06,395 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 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:06,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:06,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:06,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:06,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:06,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163405342] [2021-03-10 21:27:06,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:06,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:06,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:06,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:06,495 INFO L87 Difference]: Start difference. First operand 7283 states and 24034 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:06,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:06,628 INFO L93 Difference]: Finished difference Result 7550 states and 24471 transitions. [2021-03-10 21:27:06,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:27:06,628 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:27:06,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:06,636 INFO L225 Difference]: With dead ends: 7550 [2021-03-10 21:27:06,636 INFO L226 Difference]: Without dead ends: 7550 [2021-03-10 21:27:06,636 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:27:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7550 states. [2021-03-10 21:27:06,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7550 to 7283. [2021-03-10 21:27:06,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7283 states, 7282 states have (on average 3.3001922548750344) internal successors, (24032), 7282 states have internal predecessors, (24032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:06,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7283 states to 7283 states and 24032 transitions. [2021-03-10 21:27:06,716 INFO L78 Accepts]: Start accepts. Automaton has 7283 states and 24032 transitions. Word has length 20 [2021-03-10 21:27:06,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:06,716 INFO L480 AbstractCegarLoop]: Abstraction has 7283 states and 24032 transitions. [2021-03-10 21:27:06,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:06,716 INFO L276 IsEmpty]: Start isEmpty. Operand 7283 states and 24032 transitions. [2021-03-10 21:27:06,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:06,719 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:06,719 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:06,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3331 [2021-03-10 21:27:06,920 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:06,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:06,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1416091456, now seen corresponding path program 134 times [2021-03-10 21:27:06,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:06,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87185668] [2021-03-10 21:27:06,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:06,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87185668] [2021-03-10 21:27:06,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508199593] [2021-03-10 21:27:06,984 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:07,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:07,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:07,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:07,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:07,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:07,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:07,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405867453] [2021-03-10 21:27:07,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:07,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:07,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:07,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:07,045 INFO L87 Difference]: Start difference. First operand 7283 states and 24032 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:07,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:07,209 INFO L93 Difference]: Finished difference Result 7595 states and 24674 transitions. [2021-03-10 21:27:07,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:27:07,209 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:27:07,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:07,217 INFO L225 Difference]: With dead ends: 7595 [2021-03-10 21:27:07,217 INFO L226 Difference]: Without dead ends: 7595 [2021-03-10 21:27:07,217 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=223, Invalid=479, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:27:07,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7595 states. [2021-03-10 21:27:07,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7595 to 7376. [2021-03-10 21:27:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7376 states, 7375 states have (on average 3.296677966101695) internal successors, (24313), 7375 states have internal predecessors, (24313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7376 states to 7376 states and 24313 transitions. [2021-03-10 21:27:07,300 INFO L78 Accepts]: Start accepts. Automaton has 7376 states and 24313 transitions. Word has length 20 [2021-03-10 21:27:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:07,300 INFO L480 AbstractCegarLoop]: Abstraction has 7376 states and 24313 transitions. [2021-03-10 21:27:07,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 7376 states and 24313 transitions. [2021-03-10 21:27:07,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:07,304 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:07,304 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:07,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3332,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:07,504 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:07,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:07,505 INFO L82 PathProgramCache]: Analyzing trace with hash 148634278, now seen corresponding path program 135 times [2021-03-10 21:27:07,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:07,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945668989] [2021-03-10 21:27:07,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:07,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945668989] [2021-03-10 21:27:07,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434460179] [2021-03-10 21:27:07,581 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:07,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:27:07,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:07,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:07,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:07,644 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:07,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:07,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:07,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417709553] [2021-03-10 21:27:07,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:07,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:07,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:07,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:07,647 INFO L87 Difference]: Start difference. First operand 7376 states and 24313 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:07,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:07,887 INFO L93 Difference]: Finished difference Result 7693 states and 24913 transitions. [2021-03-10 21:27:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:27:07,888 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:27:07,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:07,897 INFO L225 Difference]: With dead ends: 7693 [2021-03-10 21:27:07,897 INFO L226 Difference]: Without dead ends: 7693 [2021-03-10 21:27:07,897 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=343, Invalid=713, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:27:07,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2021-03-10 21:27:07,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 7412. [2021-03-10 21:27:07,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 3.295236810147079) internal successors, (24421), 7411 states have internal predecessors, (24421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:07,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 24421 transitions. [2021-03-10 21:27:07,983 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 24421 transitions. Word has length 20 [2021-03-10 21:27:07,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:07,983 INFO L480 AbstractCegarLoop]: Abstraction has 7412 states and 24421 transitions. [2021-03-10 21:27:07,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:07,983 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 24421 transitions. [2021-03-10 21:27:07,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:07,987 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:07,987 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:08,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:08,187 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:08,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:08,188 INFO L82 PathProgramCache]: Analyzing trace with hash -487832576, now seen corresponding path program 136 times [2021-03-10 21:27:08,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:08,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414359501] [2021-03-10 21:27:08,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:08,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414359501] [2021-03-10 21:27:08,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040387242] [2021-03-10 21:27:08,257 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:08,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:08,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:08,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:08,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:08,320 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:08,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:08,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:08,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585316950] [2021-03-10 21:27:08,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:08,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:08,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:08,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:08,321 INFO L87 Difference]: Start difference. First operand 7412 states and 24421 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:08,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:08,613 INFO L93 Difference]: Finished difference Result 7927 states and 25571 transitions. [2021-03-10 21:27:08,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:27:08,614 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-03-10 21:27:08,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:08,622 INFO L225 Difference]: With dead ends: 7927 [2021-03-10 21:27:08,622 INFO L226 Difference]: Without dead ends: 7927 [2021-03-10 21:27:08,622 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 257.4ms TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:27:08,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-03-10 21:27:08,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7453. [2021-03-10 21:27:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7453 states, 7452 states have (on average 3.293612453032743) internal successors, (24544), 7452 states have internal predecessors, (24544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:08,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7453 states to 7453 states and 24544 transitions. [2021-03-10 21:27:08,736 INFO L78 Accepts]: Start accepts. Automaton has 7453 states and 24544 transitions. Word has length 20 [2021-03-10 21:27:08,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:08,736 INFO L480 AbstractCegarLoop]: Abstraction has 7453 states and 24544 transitions. [2021-03-10 21:27:08,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-03-10 21:27:08,736 INFO L276 IsEmpty]: Start isEmpty. Operand 7453 states and 24544 transitions. [2021-03-10 21:27:08,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:08,740 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:08,740 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:08,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3334 [2021-03-10 21:27:08,941 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:08,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:08,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1164507080, now seen corresponding path program 137 times [2021-03-10 21:27:08,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:08,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136992959] [2021-03-10 21:27:08,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:09,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136992959] [2021-03-10 21:27:09,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937318428] [2021-03-10 21:27:09,014 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:09,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:27:09,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:09,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:09,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:09,065 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:09,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:09,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:27:09,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20738715] [2021-03-10 21:27:09,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:09,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:09,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:09,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:09,066 INFO L87 Difference]: Start difference. First operand 7453 states and 24544 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-03-10 21:27:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:09,286 INFO L93 Difference]: Finished difference Result 7682 states and 24832 transitions. [2021-03-10 21:27:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:27:09,287 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 20 [2021-03-10 21:27:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:09,298 INFO L225 Difference]: With dead ends: 7682 [2021-03-10 21:27:09,298 INFO L226 Difference]: Without dead ends: 7678 [2021-03-10 21:27:09,298 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:27:09,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7678 states. [2021-03-10 21:27:09,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7678 to 7414. [2021-03-10 21:27:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7414 states, 7413 states have (on average 3.2917847025495752) internal successors, (24402), 7413 states have internal predecessors, (24402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7414 states to 7414 states and 24402 transitions. [2021-03-10 21:27:09,404 INFO L78 Accepts]: Start accepts. Automaton has 7414 states and 24402 transitions. Word has length 20 [2021-03-10 21:27:09,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:09,404 INFO L480 AbstractCegarLoop]: Abstraction has 7414 states and 24402 transitions. [2021-03-10 21:27:09,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-03-10 21:27:09,404 INFO L276 IsEmpty]: Start isEmpty. Operand 7414 states and 24402 transitions. [2021-03-10 21:27:09,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:09,408 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:09,408 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:09,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3335,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:09,609 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:09,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1963013832, now seen corresponding path program 138 times [2021-03-10 21:27:09,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:09,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965856052] [2021-03-10 21:27:09,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:09,678 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:09,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965856052] [2021-03-10 21:27:09,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104405149] [2021-03-10 21:27:09,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:09,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:27:09,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:09,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:09,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:09,744 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:09,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:09,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:09,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232229519] [2021-03-10 21:27:09,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:09,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:09,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:09,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:09,745 INFO L87 Difference]: Start difference. First operand 7414 states and 24402 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:10,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:10,020 INFO L93 Difference]: Finished difference Result 9451 states and 30109 transitions. [2021-03-10 21:27:10,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:27:10,021 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-03-10 21:27:10,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:10,034 INFO L225 Difference]: With dead ends: 9451 [2021-03-10 21:27:10,034 INFO L226 Difference]: Without dead ends: 9451 [2021-03-10 21:27:10,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 234.3ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:27:10,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9451 states. [2021-03-10 21:27:10,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9451 to 7875. [2021-03-10 21:27:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7875 states, 7874 states have (on average 3.276987553975108) internal successors, (25803), 7874 states have internal predecessors, (25803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7875 states to 7875 states and 25803 transitions. [2021-03-10 21:27:10,151 INFO L78 Accepts]: Start accepts. Automaton has 7875 states and 25803 transitions. Word has length 20 [2021-03-10 21:27:10,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:10,152 INFO L480 AbstractCegarLoop]: Abstraction has 7875 states and 25803 transitions. [2021-03-10 21:27:10,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand 7875 states and 25803 transitions. [2021-03-10 21:27:10,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:10,156 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:10,157 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:10,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3336,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:10,357 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:10,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:10,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1695486610, now seen corresponding path program 139 times [2021-03-10 21:27:10,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:10,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946229724] [2021-03-10 21:27:10,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:10,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:10,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946229724] [2021-03-10 21:27:10,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843907895] [2021-03-10 21:27:10,425 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:10,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:10,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:10,488 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:10,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:10,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:10,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855008190] [2021-03-10 21:27:10,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:10,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:10,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:10,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:10,488 INFO L87 Difference]: Start difference. First operand 7875 states and 25803 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:10,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:10,729 INFO L93 Difference]: Finished difference Result 8447 states and 27068 transitions. [2021-03-10 21:27:10,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:27:10,729 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-03-10 21:27:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:10,742 INFO L225 Difference]: With dead ends: 8447 [2021-03-10 21:27:10,742 INFO L226 Difference]: Without dead ends: 8447 [2021-03-10 21:27:10,742 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:27:10,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8447 states. [2021-03-10 21:27:10,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8447 to 7839. [2021-03-10 21:27:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7839 states, 7838 states have (on average 3.280556264353151) internal successors, (25713), 7838 states have internal predecessors, (25713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:10,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7839 states to 7839 states and 25713 transitions. [2021-03-10 21:27:10,878 INFO L78 Accepts]: Start accepts. Automaton has 7839 states and 25713 transitions. Word has length 20 [2021-03-10 21:27:10,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:10,878 INFO L480 AbstractCegarLoop]: Abstraction has 7839 states and 25713 transitions. [2021-03-10 21:27:10,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:10,878 INFO L276 IsEmpty]: Start isEmpty. Operand 7839 states and 25713 transitions. [2021-03-10 21:27:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:10,882 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:10,883 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:11,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3337,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:11,083 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:11,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:11,083 INFO L82 PathProgramCache]: Analyzing trace with hash 428029432, now seen corresponding path program 140 times [2021-03-10 21:27:11,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:11,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491108564] [2021-03-10 21:27:11,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:11,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:11,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491108564] [2021-03-10 21:27:11,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165440779] [2021-03-10 21:27:11,170 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:27:11,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:11,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:11,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:11,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:11,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:11,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:11,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:11,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229031675] [2021-03-10 21:27:11,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:11,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:11,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:11,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:11,255 INFO L87 Difference]: Start difference. First operand 7839 states and 25713 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:11,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:11,616 INFO L93 Difference]: Finished difference Result 8546 states and 27359 transitions. [2021-03-10 21:27:11,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:27:11,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-03-10 21:27:11,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:11,627 INFO L225 Difference]: With dead ends: 8546 [2021-03-10 21:27:11,627 INFO L226 Difference]: Without dead ends: 8546 [2021-03-10 21:27:11,627 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 312.6ms TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:27:11,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8546 states. [2021-03-10 21:27:11,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8546 to 7853. [2021-03-10 21:27:11,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7853 states, 7852 states have (on average 3.281074885379521) internal successors, (25763), 7852 states have internal predecessors, (25763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:11,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7853 states to 7853 states and 25763 transitions. [2021-03-10 21:27:11,773 INFO L78 Accepts]: Start accepts. Automaton has 7853 states and 25763 transitions. Word has length 20 [2021-03-10 21:27:11,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:11,773 INFO L480 AbstractCegarLoop]: Abstraction has 7853 states and 25763 transitions. [2021-03-10 21:27:11,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:11,773 INFO L276 IsEmpty]: Start isEmpty. Operand 7853 states and 25763 transitions. [2021-03-10 21:27:11,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:11,777 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:11,777 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:11,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3338 [2021-03-10 21:27:11,977 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:11,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:11,978 INFO L82 PathProgramCache]: Analyzing trace with hash -855116680, now seen corresponding path program 141 times [2021-03-10 21:27:11,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:11,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934351329] [2021-03-10 21:27:11,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:11,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:12,058 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:12,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934351329] [2021-03-10 21:27:12,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357317976] [2021-03-10 21:27:12,058 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:12,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:27:12,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:12,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:12,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:12,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:12,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:12,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839401316] [2021-03-10 21:27:12,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:12,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:12,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:12,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:12,133 INFO L87 Difference]: Start difference. First operand 7853 states and 25763 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:12,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:12,345 INFO L93 Difference]: Finished difference Result 8149 states and 26291 transitions. [2021-03-10 21:27:12,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:27:12,345 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-03-10 21:27:12,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:12,354 INFO L225 Difference]: With dead ends: 8149 [2021-03-10 21:27:12,354 INFO L226 Difference]: Without dead ends: 8149 [2021-03-10 21:27:12,354 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:27:12,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8149 states. [2021-03-10 21:27:12,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8149 to 7829. [2021-03-10 21:27:12,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7829 states, 7828 states have (on average 3.281936637710782) internal successors, (25691), 7828 states have internal predecessors, (25691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7829 states to 7829 states and 25691 transitions. [2021-03-10 21:27:12,445 INFO L78 Accepts]: Start accepts. Automaton has 7829 states and 25691 transitions. Word has length 20 [2021-03-10 21:27:12,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:12,445 INFO L480 AbstractCegarLoop]: Abstraction has 7829 states and 25691 transitions. [2021-03-10 21:27:12,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 7829 states and 25691 transitions. [2021-03-10 21:27:12,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:12,449 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:12,449 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:12,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3339 [2021-03-10 21:27:12,650 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:12,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:12,650 INFO L82 PathProgramCache]: Analyzing trace with hash -2122573858, now seen corresponding path program 142 times [2021-03-10 21:27:12,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:12,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036431306] [2021-03-10 21:27:12,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:12,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036431306] [2021-03-10 21:27:12,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542840322] [2021-03-10 21:27:12,719 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:12,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:12,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:12,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:12,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:12,781 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:12,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:12,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:12,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927573444] [2021-03-10 21:27:12,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:12,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:12,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:12,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:12,781 INFO L87 Difference]: Start difference. First operand 7829 states and 25691 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:13,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:13,032 INFO L93 Difference]: Finished difference Result 8079 states and 26147 transitions. [2021-03-10 21:27:13,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:27:13,032 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-03-10 21:27:13,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:13,041 INFO L225 Difference]: With dead ends: 8079 [2021-03-10 21:27:13,041 INFO L226 Difference]: Without dead ends: 8079 [2021-03-10 21:27:13,041 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 214.9ms TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:27:13,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8079 states. [2021-03-10 21:27:13,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8079 to 7824. [2021-03-10 21:27:13,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7824 states, 7823 states have (on average 3.2821168349737952) internal successors, (25676), 7823 states have internal predecessors, (25676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:13,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7824 states to 7824 states and 25676 transitions. [2021-03-10 21:27:13,130 INFO L78 Accepts]: Start accepts. Automaton has 7824 states and 25676 transitions. Word has length 20 [2021-03-10 21:27:13,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:13,131 INFO L480 AbstractCegarLoop]: Abstraction has 7824 states and 25676 transitions. [2021-03-10 21:27:13,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:13,131 INFO L276 IsEmpty]: Start isEmpty. Operand 7824 states and 25676 transitions. [2021-03-10 21:27:13,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:13,135 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:13,135 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:13,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3340 [2021-03-10 21:27:13,335 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:13,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:13,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1535926584, now seen corresponding path program 143 times [2021-03-10 21:27:13,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:13,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971133658] [2021-03-10 21:27:13,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:13,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971133658] [2021-03-10 21:27:13,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677395476] [2021-03-10 21:27:13,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:13,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:27:13,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:13,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:13,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:13,472 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:13,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:13,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:13,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058433189] [2021-03-10 21:27:13,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:13,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:13,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:13,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:13,473 INFO L87 Difference]: Start difference. First operand 7824 states and 25676 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:13,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:13,770 INFO L93 Difference]: Finished difference Result 8238 states and 26604 transitions. [2021-03-10 21:27:13,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:27:13,770 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-03-10 21:27:13,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:13,779 INFO L225 Difference]: With dead ends: 8238 [2021-03-10 21:27:13,779 INFO L226 Difference]: Without dead ends: 8238 [2021-03-10 21:27:13,779 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 266.9ms TimeCoverageRelationStatistics Valid=468, Invalid=938, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:27:13,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8238 states. [2021-03-10 21:27:13,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8238 to 7821. [2021-03-10 21:27:13,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7821 states, 7820 states have (on average 3.282225063938619) internal successors, (25667), 7820 states have internal predecessors, (25667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7821 states to 7821 states and 25667 transitions. [2021-03-10 21:27:13,897 INFO L78 Accepts]: Start accepts. Automaton has 7821 states and 25667 transitions. Word has length 20 [2021-03-10 21:27:13,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:13,897 INFO L480 AbstractCegarLoop]: Abstraction has 7821 states and 25667 transitions. [2021-03-10 21:27:13,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 7821 states and 25667 transitions. [2021-03-10 21:27:13,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:13,902 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:13,902 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:14,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3341 [2021-03-10 21:27:14,103 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:14,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:14,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1918365366, now seen corresponding path program 144 times [2021-03-10 21:27:14,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:14,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160205969] [2021-03-10 21:27:14,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:14,155 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:14,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160205969] [2021-03-10 21:27:14,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332418606] [2021-03-10 21:27:14,155 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:14,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:27:14,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:14,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:14,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:14,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:14,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:27:14,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268488153] [2021-03-10 21:27:14,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:27:14,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:14,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:27:14,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:27:14,208 INFO L87 Difference]: Start difference. First operand 7821 states and 25667 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:14,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:14,364 INFO L93 Difference]: Finished difference Result 8648 states and 28004 transitions. [2021-03-10 21:27:14,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:27:14,365 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:27:14,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:14,374 INFO L225 Difference]: With dead ends: 8648 [2021-03-10 21:27:14,374 INFO L226 Difference]: Without dead ends: 8646 [2021-03-10 21:27:14,374 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:27:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8646 states. [2021-03-10 21:27:14,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8646 to 8471. [2021-03-10 21:27:14,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8471 states, 8470 states have (on average 3.282880755608028) internal successors, (27806), 8470 states have internal predecessors, (27806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8471 states to 8471 states and 27806 transitions. [2021-03-10 21:27:14,475 INFO L78 Accepts]: Start accepts. Automaton has 8471 states and 27806 transitions. Word has length 20 [2021-03-10 21:27:14,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:14,475 INFO L480 AbstractCegarLoop]: Abstraction has 8471 states and 27806 transitions. [2021-03-10 21:27:14,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:14,475 INFO L276 IsEmpty]: Start isEmpty. Operand 8471 states and 27806 transitions. [2021-03-10 21:27:14,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:14,479 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:14,480 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:14,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3342 [2021-03-10 21:27:14,682 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:14,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:14,682 INFO L82 PathProgramCache]: Analyzing trace with hash -339144456, now seen corresponding path program 145 times [2021-03-10 21:27:14,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:14,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875931614] [2021-03-10 21:27:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:14,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875931614] [2021-03-10 21:27:14,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552587827] [2021-03-10 21:27:14,734 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:14,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:14,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:14,790 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:14,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:14,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:27:14,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576276858] [2021-03-10 21:27:14,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:27:14,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:14,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:27:14,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:27:14,791 INFO L87 Difference]: Start difference. First operand 8471 states and 27806 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:14,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:14,888 INFO L93 Difference]: Finished difference Result 8734 states and 28233 transitions. [2021-03-10 21:27:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:27:14,888 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:27:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:14,897 INFO L225 Difference]: With dead ends: 8734 [2021-03-10 21:27:14,897 INFO L226 Difference]: Without dead ends: 8734 [2021-03-10 21:27:14,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 78.0ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:27:14,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8734 states. [2021-03-10 21:27:14,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8734 to 8472. [2021-03-10 21:27:14,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8472 states, 8471 states have (on average 3.282611261952544) internal successors, (27807), 8471 states have internal predecessors, (27807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:14,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8472 states to 8472 states and 27807 transitions. [2021-03-10 21:27:14,993 INFO L78 Accepts]: Start accepts. Automaton has 8472 states and 27807 transitions. Word has length 20 [2021-03-10 21:27:14,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:14,993 INFO L480 AbstractCegarLoop]: Abstraction has 8472 states and 27807 transitions. [2021-03-10 21:27:14,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:14,993 INFO L276 IsEmpty]: Start isEmpty. Operand 8472 states and 27807 transitions. [2021-03-10 21:27:14,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:14,997 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:14,998 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:15,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3343,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:15,198 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:15,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:15,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2068191790, now seen corresponding path program 146 times [2021-03-10 21:27:15,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:15,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383183282] [2021-03-10 21:27:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:15,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:15,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383183282] [2021-03-10 21:27:15,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142803052] [2021-03-10 21:27:15,249 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:15,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:15,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:15,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:15,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:15,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:15,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:27:15,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954444988] [2021-03-10 21:27:15,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:15,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:15,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:15,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:15,312 INFO L87 Difference]: Start difference. First operand 8472 states and 27807 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-03-10 21:27:15,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:15,439 INFO L93 Difference]: Finished difference Result 8819 states and 28448 transitions. [2021-03-10 21:27:15,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:27:15,440 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 20 [2021-03-10 21:27:15,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:15,449 INFO L225 Difference]: With dead ends: 8819 [2021-03-10 21:27:15,449 INFO L226 Difference]: Without dead ends: 8819 [2021-03-10 21:27:15,449 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:27:15,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8819 states. [2021-03-10 21:27:15,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8819 to 8488. [2021-03-10 21:27:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8488 states, 8487 states have (on average 3.2818428184281845) internal successors, (27853), 8487 states have internal predecessors, (27853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8488 states to 8488 states and 27853 transitions. [2021-03-10 21:27:15,544 INFO L78 Accepts]: Start accepts. Automaton has 8488 states and 27853 transitions. Word has length 20 [2021-03-10 21:27:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:15,544 INFO L480 AbstractCegarLoop]: Abstraction has 8488 states and 27853 transitions. [2021-03-10 21:27:15,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-03-10 21:27:15,544 INFO L276 IsEmpty]: Start isEmpty. Operand 8488 states and 27853 transitions. [2021-03-10 21:27:15,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:15,549 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:15,549 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:15,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3344,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:15,749 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:15,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:15,750 INFO L82 PathProgramCache]: Analyzing trace with hash 165915704, now seen corresponding path program 147 times [2021-03-10 21:27:15,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:15,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018894042] [2021-03-10 21:27:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:15,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018894042] [2021-03-10 21:27:15,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289777336] [2021-03-10 21:27:15,805 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:15,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:27:15,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:15,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:15,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:15,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:15,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:27:15,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777099996] [2021-03-10 21:27:15,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:15,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:15,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:15,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:15,872 INFO L87 Difference]: Start difference. First operand 8488 states and 27853 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-03-10 21:27:16,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:16,015 INFO L93 Difference]: Finished difference Result 10243 states and 33004 transitions. [2021-03-10 21:27:16,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:27:16,015 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 20 [2021-03-10 21:27:16,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:16,028 INFO L225 Difference]: With dead ends: 10243 [2021-03-10 21:27:16,028 INFO L226 Difference]: Without dead ends: 10243 [2021-03-10 21:27:16,028 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:16,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10243 states. [2021-03-10 21:27:16,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10243 to 9399. [2021-03-10 21:27:16,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9399 states, 9398 states have (on average 3.282932538838051) internal successors, (30853), 9398 states have internal predecessors, (30853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:16,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9399 states to 9399 states and 30853 transitions. [2021-03-10 21:27:16,152 INFO L78 Accepts]: Start accepts. Automaton has 9399 states and 30853 transitions. Word has length 20 [2021-03-10 21:27:16,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:16,152 INFO L480 AbstractCegarLoop]: Abstraction has 9399 states and 30853 transitions. [2021-03-10 21:27:16,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-03-10 21:27:16,152 INFO L276 IsEmpty]: Start isEmpty. Operand 9399 states and 30853 transitions. [2021-03-10 21:27:16,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:16,157 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:16,157 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:16,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3345,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:16,357 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:16,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:16,358 INFO L82 PathProgramCache]: Analyzing trace with hash 703771282, now seen corresponding path program 148 times [2021-03-10 21:27:16,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:16,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744238879] [2021-03-10 21:27:16,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:16,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744238879] [2021-03-10 21:27:16,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185240634] [2021-03-10 21:27:16,471 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:16,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:16,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:16,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:16,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:16,545 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:16,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:16,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:27:16,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350247708] [2021-03-10 21:27:16,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:16,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:16,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:16,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:16,546 INFO L87 Difference]: Start difference. First operand 9399 states and 30853 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-03-10 21:27:16,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:16,678 INFO L93 Difference]: Finished difference Result 10149 states and 32809 transitions. [2021-03-10 21:27:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:27:16,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 20 [2021-03-10 21:27:16,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:16,690 INFO L225 Difference]: With dead ends: 10149 [2021-03-10 21:27:16,690 INFO L226 Difference]: Without dead ends: 10149 [2021-03-10 21:27:16,690 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:27:16,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10149 states. [2021-03-10 21:27:16,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10149 to 9884. [2021-03-10 21:27:16,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9884 states, 9883 states have (on average 3.274208236365476) internal successors, (32359), 9883 states have internal predecessors, (32359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:16,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 32359 transitions. [2021-03-10 21:27:16,807 INFO L78 Accepts]: Start accepts. Automaton has 9884 states and 32359 transitions. Word has length 20 [2021-03-10 21:27:16,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:16,807 INFO L480 AbstractCegarLoop]: Abstraction has 9884 states and 32359 transitions. [2021-03-10 21:27:16,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-03-10 21:27:16,807 INFO L276 IsEmpty]: Start isEmpty. Operand 9884 states and 32359 transitions. [2021-03-10 21:27:16,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:16,812 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:16,812 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:17,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3346 [2021-03-10 21:27:17,013 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:17,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:17,013 INFO L82 PathProgramCache]: Analyzing trace with hash 197425016, now seen corresponding path program 149 times [2021-03-10 21:27:17,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:17,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718007497] [2021-03-10 21:27:17,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:17,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718007497] [2021-03-10 21:27:17,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153857516] [2021-03-10 21:27:17,073 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:17,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:27:17,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:17,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:17,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:17,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:17,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:27:17,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705530475] [2021-03-10 21:27:17,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:17,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:17,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:17,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:17,135 INFO L87 Difference]: Start difference. First operand 9884 states and 32359 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-03-10 21:27:17,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:17,229 INFO L93 Difference]: Finished difference Result 10072 states and 32751 transitions. [2021-03-10 21:27:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:27:17,230 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 20 [2021-03-10 21:27:17,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:17,241 INFO L225 Difference]: With dead ends: 10072 [2021-03-10 21:27:17,242 INFO L226 Difference]: Without dead ends: 10072 [2021-03-10 21:27:17,242 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:27:17,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10072 states. [2021-03-10 21:27:17,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10072 to 9967. [2021-03-10 21:27:17,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9967 states, 9966 states have (on average 3.2728276138872165) internal successors, (32617), 9966 states have internal predecessors, (32617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:17,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9967 states to 9967 states and 32617 transitions. [2021-03-10 21:27:17,359 INFO L78 Accepts]: Start accepts. Automaton has 9967 states and 32617 transitions. Word has length 20 [2021-03-10 21:27:17,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:17,359 INFO L480 AbstractCegarLoop]: Abstraction has 9967 states and 32617 transitions. [2021-03-10 21:27:17,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-03-10 21:27:17,359 INFO L276 IsEmpty]: Start isEmpty. Operand 9967 states and 32617 transitions. [2021-03-10 21:27:17,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:17,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:17,364 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:17,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3347,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:17,564 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:17,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:17,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1680559954, now seen corresponding path program 150 times [2021-03-10 21:27:17,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:17,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350060352] [2021-03-10 21:27:17,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:17,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350060352] [2021-03-10 21:27:17,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796237207] [2021-03-10 21:27:17,645 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:17,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:27:17,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:17,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:17,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:17,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:17,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:17,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143984002] [2021-03-10 21:27:17,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:17,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:17,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:17,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:17,720 INFO L87 Difference]: Start difference. First operand 9967 states and 32617 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:17,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:17,921 INFO L93 Difference]: Finished difference Result 10101 states and 32808 transitions. [2021-03-10 21:27:17,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:27:17,922 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-03-10 21:27:17,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:17,933 INFO L225 Difference]: With dead ends: 10101 [2021-03-10 21:27:17,933 INFO L226 Difference]: Without dead ends: 10101 [2021-03-10 21:27:17,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 173.4ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:27:17,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10101 states. [2021-03-10 21:27:18,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10101 to 9954. [2021-03-10 21:27:18,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9954 states, 9953 states have (on average 3.2730834924143473) internal successors, (32577), 9953 states have internal predecessors, (32577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:18,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9954 states to 9954 states and 32577 transitions. [2021-03-10 21:27:18,052 INFO L78 Accepts]: Start accepts. Automaton has 9954 states and 32577 transitions. Word has length 20 [2021-03-10 21:27:18,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:18,052 INFO L480 AbstractCegarLoop]: Abstraction has 9954 states and 32577 transitions. [2021-03-10 21:27:18,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:18,052 INFO L276 IsEmpty]: Start isEmpty. Operand 9954 states and 32577 transitions. [2021-03-10 21:27:18,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:18,056 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:18,056 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:18,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3348 [2021-03-10 21:27:18,257 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:18,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:18,257 INFO L82 PathProgramCache]: Analyzing trace with hash 413102776, now seen corresponding path program 151 times [2021-03-10 21:27:18,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:18,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411574101] [2021-03-10 21:27:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:18,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411574101] [2021-03-10 21:27:18,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156807070] [2021-03-10 21:27:18,325 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:18,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:18,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:18,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:18,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:18,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572188237] [2021-03-10 21:27:18,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:18,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:18,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:18,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:18,386 INFO L87 Difference]: Start difference. First operand 9954 states and 32577 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:18,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:18,584 INFO L93 Difference]: Finished difference Result 10116 states and 32868 transitions. [2021-03-10 21:27:18,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:27:18,585 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-03-10 21:27:18,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:18,596 INFO L225 Difference]: With dead ends: 10116 [2021-03-10 21:27:18,597 INFO L226 Difference]: Without dead ends: 10116 [2021-03-10 21:27:18,597 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 168.4ms TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:18,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10116 states. [2021-03-10 21:27:18,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10116 to 9959. [2021-03-10 21:27:18,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9959 states, 9958 states have (on average 3.272845953002611) internal successors, (32591), 9958 states have internal predecessors, (32591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:18,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9959 states to 9959 states and 32591 transitions. [2021-03-10 21:27:18,761 INFO L78 Accepts]: Start accepts. Automaton has 9959 states and 32591 transitions. Word has length 20 [2021-03-10 21:27:18,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:18,761 INFO L480 AbstractCegarLoop]: Abstraction has 9959 states and 32591 transitions. [2021-03-10 21:27:18,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:18,762 INFO L276 IsEmpty]: Start isEmpty. Operand 9959 states and 32591 transitions. [2021-03-10 21:27:18,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:18,767 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:18,767 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:18,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3349,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:18,967 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:18,967 INFO L82 PathProgramCache]: Analyzing trace with hash -223364078, now seen corresponding path program 152 times [2021-03-10 21:27:18,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:18,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683604480] [2021-03-10 21:27:18,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:19,046 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:19,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683604480] [2021-03-10 21:27:19,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319029340] [2021-03-10 21:27:19,046 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:19,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:19,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:19,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:19,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:19,107 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:19,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:19,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:19,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750065373] [2021-03-10 21:27:19,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:19,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:19,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:19,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:19,108 INFO L87 Difference]: Start difference. First operand 9959 states and 32591 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:19,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:19,329 INFO L93 Difference]: Finished difference Result 10234 states and 33185 transitions. [2021-03-10 21:27:19,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:27:19,330 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-03-10 21:27:19,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:19,343 INFO L225 Difference]: With dead ends: 10234 [2021-03-10 21:27:19,343 INFO L226 Difference]: Without dead ends: 10234 [2021-03-10 21:27:19,344 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=324, Invalid=668, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:27:19,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10234 states. [2021-03-10 21:27:19,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10234 to 9965. [2021-03-10 21:27:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9965 states, 9964 states have (on average 3.2725812926535527) internal successors, (32608), 9964 states have internal predecessors, (32608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:19,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9965 states to 9965 states and 32608 transitions. [2021-03-10 21:27:19,480 INFO L78 Accepts]: Start accepts. Automaton has 9965 states and 32608 transitions. Word has length 20 [2021-03-10 21:27:19,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:19,480 INFO L480 AbstractCegarLoop]: Abstraction has 9965 states and 32608 transitions. [2021-03-10 21:27:19,480 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:19,481 INFO L276 IsEmpty]: Start isEmpty. Operand 9965 states and 32608 transitions. [2021-03-10 21:27:19,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:27:19,486 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:19,486 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:19,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3350,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:19,686 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:19,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:19,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1520999928, now seen corresponding path program 153 times [2021-03-10 21:27:19,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:19,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766062981] [2021-03-10 21:27:19,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:19,791 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:19,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766062981] [2021-03-10 21:27:19,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673313314] [2021-03-10 21:27:19,792 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:19,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:27:19,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:19,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:19,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:19,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:19,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:19,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750452147] [2021-03-10 21:27:19,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:19,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:19,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:19,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:19,861 INFO L87 Difference]: Start difference. First operand 9965 states and 32608 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:20,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:20,138 INFO L93 Difference]: Finished difference Result 10435 states and 33779 transitions. [2021-03-10 21:27:20,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:27:20,139 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 20 [2021-03-10 21:27:20,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:20,155 INFO L225 Difference]: With dead ends: 10435 [2021-03-10 21:27:20,155 INFO L226 Difference]: Without dead ends: 10435 [2021-03-10 21:27:20,155 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:27:20,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-03-10 21:27:20,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 9964. [2021-03-10 21:27:20,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.274114222623708) internal successors, (32620), 9963 states have internal predecessors, (32620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:20,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32620 transitions. [2021-03-10 21:27:20,303 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32620 transitions. Word has length 20 [2021-03-10 21:27:20,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:20,303 INFO L480 AbstractCegarLoop]: Abstraction has 9964 states and 32620 transitions. [2021-03-10 21:27:20,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:20,303 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32620 transitions. [2021-03-10 21:27:20,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:20,309 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:20,309 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:20,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3351 [2021-03-10 21:27:20,509 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:20,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:20,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1811260523, now seen corresponding path program 154 times [2021-03-10 21:27:20,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:20,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576548900] [2021-03-10 21:27:20,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:20,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576548900] [2021-03-10 21:27:20,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753064465] [2021-03-10 21:27:20,573 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 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:20,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:20,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:20,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:20,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:20,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:20,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:27:20,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139922875] [2021-03-10 21:27:20,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:20,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:20,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:20,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:20,639 INFO L87 Difference]: Start difference. First operand 9964 states and 32620 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) [2021-03-10 21:27:20,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:20,827 INFO L93 Difference]: Finished difference Result 10126 states and 32846 transitions. [2021-03-10 21:27:20,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:27:20,827 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 21 [2021-03-10 21:27:20,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:20,839 INFO L225 Difference]: With dead ends: 10126 [2021-03-10 21:27:20,839 INFO L226 Difference]: Without dead ends: 10123 [2021-03-10 21:27:20,839 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:27:20,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10123 states. [2021-03-10 21:27:20,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10123 to 9964. [2021-03-10 21:27:20,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.273511994379203) internal successors, (32614), 9963 states have internal predecessors, (32614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:20,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32614 transitions. [2021-03-10 21:27:20,966 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32614 transitions. Word has length 21 [2021-03-10 21:27:20,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:20,966 INFO L480 AbstractCegarLoop]: Abstraction has 9964 states and 32614 transitions. [2021-03-10 21:27:20,966 INFO L481 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) [2021-03-10 21:27:20,966 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32614 transitions. [2021-03-10 21:27:20,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:20,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:20,971 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:21,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3352,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:21,172 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:21,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:21,172 INFO L82 PathProgramCache]: Analyzing trace with hash 738175143, now seen corresponding path program 155 times [2021-03-10 21:27:21,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:21,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411850855] [2021-03-10 21:27:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:21,236 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:21,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411850855] [2021-03-10 21:27:21,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125425718] [2021-03-10 21:27:21,236 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:21,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:27:21,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:21,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:21,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:21,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:21,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:21,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739037917] [2021-03-10 21:27:21,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:21,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:21,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:21,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:21,300 INFO L87 Difference]: Start difference. First operand 9964 states and 32614 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:21,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:21,506 INFO L93 Difference]: Finished difference Result 10176 states and 33094 transitions. [2021-03-10 21:27:21,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:27:21,507 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21 [2021-03-10 21:27:21,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:21,518 INFO L225 Difference]: With dead ends: 10176 [2021-03-10 21:27:21,518 INFO L226 Difference]: Without dead ends: 10172 [2021-03-10 21:27:21,518 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:27:21,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10172 states. [2021-03-10 21:27:21,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10172 to 9964. [2021-03-10 21:27:21,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.2733112516310348) internal successors, (32612), 9963 states have internal predecessors, (32612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:21,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32612 transitions. [2021-03-10 21:27:21,634 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32612 transitions. Word has length 21 [2021-03-10 21:27:21,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:21,634 INFO L480 AbstractCegarLoop]: Abstraction has 9964 states and 32612 transitions. [2021-03-10 21:27:21,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:21,635 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32612 transitions. [2021-03-10 21:27:21,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:21,639 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:21,639 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:21,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3353 [2021-03-10 21:27:21,840 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:21,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:21,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1832266731, now seen corresponding path program 156 times [2021-03-10 21:27:21,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:21,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46959440] [2021-03-10 21:27:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:21,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46959440] [2021-03-10 21:27:21,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539750235] [2021-03-10 21:27:21,909 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:21,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:27:21,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:21,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:21,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:21,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:21,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:21,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455614877] [2021-03-10 21:27:21,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:21,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:21,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:21,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:21,972 INFO L87 Difference]: Start difference. First operand 9964 states and 32612 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:22,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:22,157 INFO L93 Difference]: Finished difference Result 10153 states and 33062 transitions. [2021-03-10 21:27:22,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:27:22,158 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21 [2021-03-10 21:27:22,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:22,170 INFO L225 Difference]: With dead ends: 10153 [2021-03-10 21:27:22,170 INFO L226 Difference]: Without dead ends: 10148 [2021-03-10 21:27:22,170 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:27:22,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10148 states. [2021-03-10 21:27:22,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10148 to 9966. [2021-03-10 21:27:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9966 states, 9965 states have (on average 3.2727546412443553) internal successors, (32613), 9965 states have internal predecessors, (32613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:22,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 32613 transitions. [2021-03-10 21:27:22,291 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 32613 transitions. Word has length 21 [2021-03-10 21:27:22,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:22,291 INFO L480 AbstractCegarLoop]: Abstraction has 9966 states and 32613 transitions. [2021-03-10 21:27:22,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:22,291 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 32613 transitions. [2021-03-10 21:27:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:22,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:22,296 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:22,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:22,497 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:22,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:22,497 INFO L82 PathProgramCache]: Analyzing trace with hash 469064323, now seen corresponding path program 157 times [2021-03-10 21:27:22,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:22,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391907842] [2021-03-10 21:27:22,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:22,550 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:22,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391907842] [2021-03-10 21:27:22,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350974725] [2021-03-10 21:27:22,550 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:22,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:22,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:22,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:22,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:27:22,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488910815] [2021-03-10 21:27:22,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:27:22,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:22,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:27:22,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:27:22,610 INFO L87 Difference]: Start difference. First operand 9966 states and 32613 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:22,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:22,710 INFO L93 Difference]: Finished difference Result 10154 states and 32869 transitions. [2021-03-10 21:27:22,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:27:22,711 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:27:22,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:22,723 INFO L225 Difference]: With dead ends: 10154 [2021-03-10 21:27:22,723 INFO L226 Difference]: Without dead ends: 10152 [2021-03-10 21:27:22,723 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10152 states. [2021-03-10 21:27:22,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10152 to 9957. [2021-03-10 21:27:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9957 states, 9956 states have (on average 3.2695861791884293) internal successors, (32552), 9956 states have internal predecessors, (32552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:22,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9957 states to 9957 states and 32552 transitions. [2021-03-10 21:27:22,840 INFO L78 Accepts]: Start accepts. Automaton has 9957 states and 32552 transitions. Word has length 21 [2021-03-10 21:27:22,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:22,841 INFO L480 AbstractCegarLoop]: Abstraction has 9957 states and 32552 transitions. [2021-03-10 21:27:22,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:22,841 INFO L276 IsEmpty]: Start isEmpty. Operand 9957 states and 32552 transitions. [2021-03-10 21:27:22,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:22,845 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:22,845 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:23,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3355,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:23,046 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:23,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:23,046 INFO L82 PathProgramCache]: Analyzing trace with hash -2085810663, now seen corresponding path program 158 times [2021-03-10 21:27:23,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:23,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528736524] [2021-03-10 21:27:23,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:23,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528736524] [2021-03-10 21:27:23,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051980590] [2021-03-10 21:27:23,102 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:23,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:23,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:23,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:23,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:23,160 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:23,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:23,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-03-10 21:27:23,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090886682] [2021-03-10 21:27:23,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:23,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:23,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:23,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:23,160 INFO L87 Difference]: Start difference. First operand 9957 states and 32552 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:27:23,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:23,280 INFO L93 Difference]: Finished difference Result 10120 states and 32729 transitions. [2021-03-10 21:27:23,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:27:23,280 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-03-10 21:27:23,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:23,291 INFO L225 Difference]: With dead ends: 10120 [2021-03-10 21:27:23,291 INFO L226 Difference]: Without dead ends: 10120 [2021-03-10 21:27:23,292 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:27:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10120 states. [2021-03-10 21:27:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10120 to 9951. [2021-03-10 21:27:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9951 states, 9950 states have (on average 3.2641206030150753) internal successors, (32478), 9950 states have internal predecessors, (32478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:23,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9951 states to 9951 states and 32478 transitions. [2021-03-10 21:27:23,408 INFO L78 Accepts]: Start accepts. Automaton has 9951 states and 32478 transitions. Word has length 21 [2021-03-10 21:27:23,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:23,408 INFO L480 AbstractCegarLoop]: Abstraction has 9951 states and 32478 transitions. [2021-03-10 21:27:23,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:27:23,408 INFO L276 IsEmpty]: Start isEmpty. Operand 9951 states and 32478 transitions. [2021-03-10 21:27:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:23,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:23,413 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:23,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3356,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:23,613 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:23,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:23,613 INFO L82 PathProgramCache]: Analyzing trace with hash -375197355, now seen corresponding path program 159 times [2021-03-10 21:27:23,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:23,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539371861] [2021-03-10 21:27:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:23,680 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:23,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539371861] [2021-03-10 21:27:23,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104218666] [2021-03-10 21:27:23,680 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:23,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:27:23,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:23,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:23,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:23,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:23,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:27:23,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982155416] [2021-03-10 21:27:23,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:23,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:23,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:23,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:23,736 INFO L87 Difference]: Start difference. First operand 9951 states and 32478 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-03-10 21:27:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:23,939 INFO L93 Difference]: Finished difference Result 10112 states and 32702 transitions. [2021-03-10 21:27:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:27:23,940 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 21 [2021-03-10 21:27:23,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:23,951 INFO L225 Difference]: With dead ends: 10112 [2021-03-10 21:27:23,952 INFO L226 Difference]: Without dead ends: 10109 [2021-03-10 21:27:23,952 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:23,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10109 states. [2021-03-10 21:27:24,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10109 to 9943. [2021-03-10 21:27:24,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.2572922953128143) internal successors, (32384), 9942 states have internal predecessors, (32384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:24,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32384 transitions. [2021-03-10 21:27:24,069 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32384 transitions. Word has length 21 [2021-03-10 21:27:24,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:24,070 INFO L480 AbstractCegarLoop]: Abstraction has 9943 states and 32384 transitions. [2021-03-10 21:27:24,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-03-10 21:27:24,070 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32384 transitions. [2021-03-10 21:27:24,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:24,074 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:24,075 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:24,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:24,275 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:24,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:24,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1114207641, now seen corresponding path program 160 times [2021-03-10 21:27:24,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:24,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624300201] [2021-03-10 21:27:24,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:24,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624300201] [2021-03-10 21:27:24,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287862855] [2021-03-10 21:27:24,345 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:24,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:24,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:24,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:24,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:24,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:24,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-03-10 21:27:24,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43044985] [2021-03-10 21:27:24,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:24,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:24,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:24,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:24,407 INFO L87 Difference]: Start difference. First operand 9943 states and 32384 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) [2021-03-10 21:27:24,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:24,588 INFO L93 Difference]: Finished difference Result 10108 states and 32615 transitions. [2021-03-10 21:27:24,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:27:24,588 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 21 [2021-03-10 21:27:24,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:24,600 INFO L225 Difference]: With dead ends: 10108 [2021-03-10 21:27:24,600 INFO L226 Difference]: Without dead ends: 10105 [2021-03-10 21:27:24,600 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:27:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10105 states. [2021-03-10 21:27:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10105 to 9943. [2021-03-10 21:27:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256588211627439) internal successors, (32377), 9942 states have internal predecessors, (32377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:24,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32377 transitions. [2021-03-10 21:27:24,718 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32377 transitions. Word has length 21 [2021-03-10 21:27:24,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:24,718 INFO L480 AbstractCegarLoop]: Abstraction has 9943 states and 32377 transitions. [2021-03-10 21:27:24,718 INFO L481 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) [2021-03-10 21:27:24,718 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32377 transitions. [2021-03-10 21:27:24,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:24,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:24,723 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:24,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3358,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:24,924 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:24,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:24,924 INFO L82 PathProgramCache]: Analyzing trace with hash 41122261, now seen corresponding path program 161 times [2021-03-10 21:27:24,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:24,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083550284] [2021-03-10 21:27:24,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:24,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083550284] [2021-03-10 21:27:24,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760002627] [2021-03-10 21:27:24,993 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:25,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:27:25,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:25,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:25,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:25,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:25,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-03-10 21:27:25,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562542324] [2021-03-10 21:27:25,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:25,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:25,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:25,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:25,052 INFO L87 Difference]: Start difference. First operand 9943 states and 32377 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) [2021-03-10 21:27:25,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:25,240 INFO L93 Difference]: Finished difference Result 10188 states and 32924 transitions. [2021-03-10 21:27:25,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:27:25,241 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 21 [2021-03-10 21:27:25,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:25,253 INFO L225 Difference]: With dead ends: 10188 [2021-03-10 21:27:25,253 INFO L226 Difference]: Without dead ends: 10184 [2021-03-10 21:27:25,254 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:27:25,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10184 states. [2021-03-10 21:27:25,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10184 to 9943. [2021-03-10 21:27:25,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256487628243814) internal successors, (32376), 9942 states have internal predecessors, (32376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:25,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32376 transitions. [2021-03-10 21:27:25,375 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32376 transitions. Word has length 21 [2021-03-10 21:27:25,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:25,376 INFO L480 AbstractCegarLoop]: Abstraction has 9943 states and 32376 transitions. [2021-03-10 21:27:25,376 INFO L481 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) [2021-03-10 21:27:25,376 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32376 transitions. [2021-03-10 21:27:25,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:25,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:25,380 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:25,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3359,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:25,581 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:25,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:25,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1135213849, now seen corresponding path program 162 times [2021-03-10 21:27:25,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:25,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935668328] [2021-03-10 21:27:25,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:25,652 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:25,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935668328] [2021-03-10 21:27:25,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450671412] [2021-03-10 21:27:25,652 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:25,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:27:25,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:25,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:25,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:25,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:25,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:27:25,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589279834] [2021-03-10 21:27:25,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:25,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:25,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:25,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:25,708 INFO L87 Difference]: Start difference. First operand 9943 states and 32376 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:25,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:25,885 INFO L93 Difference]: Finished difference Result 10178 states and 32911 transitions. [2021-03-10 21:27:25,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:27:25,885 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21 [2021-03-10 21:27:25,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:25,897 INFO L225 Difference]: With dead ends: 10178 [2021-03-10 21:27:25,897 INFO L226 Difference]: Without dead ends: 10173 [2021-03-10 21:27:25,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=191, Invalid=409, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:27:25,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10173 states. [2021-03-10 21:27:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10173 to 9943. [2021-03-10 21:27:26,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256387044860189) internal successors, (32375), 9942 states have internal predecessors, (32375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:26,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32375 transitions. [2021-03-10 21:27:26,021 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32375 transitions. Word has length 21 [2021-03-10 21:27:26,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:26,021 INFO L480 AbstractCegarLoop]: Abstraction has 9943 states and 32375 transitions. [2021-03-10 21:27:26,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:26,022 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32375 transitions. [2021-03-10 21:27:26,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:26,027 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:26,027 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:26,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3360 [2021-03-10 21:27:26,227 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:26,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:26,228 INFO L82 PathProgramCache]: Analyzing trace with hash 692314709, now seen corresponding path program 163 times [2021-03-10 21:27:26,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:26,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018120632] [2021-03-10 21:27:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:26,395 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:26,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018120632] [2021-03-10 21:27:26,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361336855] [2021-03-10 21:27:26,395 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:26,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:26,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:26,447 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:26,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:26,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-03-10 21:27:26,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252142670] [2021-03-10 21:27:26,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:26,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:26,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:26,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:26,448 INFO L87 Difference]: Start difference. First operand 9943 states and 32375 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) [2021-03-10 21:27:26,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:26,618 INFO L93 Difference]: Finished difference Result 10151 states and 32872 transitions. [2021-03-10 21:27:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:27:26,619 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 21 [2021-03-10 21:27:26,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:26,629 INFO L225 Difference]: With dead ends: 10151 [2021-03-10 21:27:26,629 INFO L226 Difference]: Without dead ends: 10145 [2021-03-10 21:27:26,630 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:27:26,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10145 states. [2021-03-10 21:27:26,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10145 to 9945. [2021-03-10 21:27:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9945 states, 9944 states have (on average 3.255832662912309) internal successors, (32376), 9944 states have internal predecessors, (32376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:26,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9945 states to 9945 states and 32376 transitions. [2021-03-10 21:27:26,742 INFO L78 Accepts]: Start accepts. Automaton has 9945 states and 32376 transitions. Word has length 21 [2021-03-10 21:27:26,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:26,742 INFO L480 AbstractCegarLoop]: Abstraction has 9945 states and 32376 transitions. [2021-03-10 21:27:26,742 INFO L481 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) [2021-03-10 21:27:26,742 INFO L276 IsEmpty]: Start isEmpty. Operand 9945 states and 32376 transitions. [2021-03-10 21:27:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:26,747 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:26,747 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:26,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3361 [2021-03-10 21:27:26,947 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:26,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:26,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1359739827, now seen corresponding path program 164 times [2021-03-10 21:27:26,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:26,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323687426] [2021-03-10 21:27:26,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:26,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:26,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323687426] [2021-03-10 21:27:26,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314885237] [2021-03-10 21:27:26,996 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:27,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:27,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:27,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:27,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:27:27,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:27,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:27:27,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805047289] [2021-03-10 21:27:27,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:27:27,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:27,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:27:27,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:27:27,056 INFO L87 Difference]: Start difference. First operand 9945 states and 32376 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:27:27,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:27,167 INFO L93 Difference]: Finished difference Result 10106 states and 32713 transitions. [2021-03-10 21:27:27,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:27:27,168 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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 [2021-03-10 21:27:27,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:27,179 INFO L225 Difference]: With dead ends: 10106 [2021-03-10 21:27:27,179 INFO L226 Difference]: Without dead ends: 10106 [2021-03-10 21:27:27,179 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:27:27,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10106 states. [2021-03-10 21:27:27,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10106 to 9975. [2021-03-10 21:27:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.2557649889713254) internal successors, (32473), 9974 states have internal predecessors, (32473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:27,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32473 transitions. [2021-03-10 21:27:27,294 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32473 transitions. Word has length 21 [2021-03-10 21:27:27,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:27,294 INFO L480 AbstractCegarLoop]: Abstraction has 9975 states and 32473 transitions. [2021-03-10 21:27:27,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 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) [2021-03-10 21:27:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32473 transitions. [2021-03-10 21:27:27,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:27,299 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:27,299 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:27,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3362,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:27,500 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:27,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:27,500 INFO L82 PathProgramCache]: Analyzing trace with hash 328108493, now seen corresponding path program 165 times [2021-03-10 21:27:27,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:27,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780837535] [2021-03-10 21:27:27,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:27,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780837535] [2021-03-10 21:27:27,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968096428] [2021-03-10 21:27:27,555 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 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:27,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:27:27,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:27,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:27,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:27,610 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:27,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:27,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:27:27,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393596208] [2021-03-10 21:27:27,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:27:27,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:27,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:27:27,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:27:27,610 INFO L87 Difference]: Start difference. First operand 9975 states and 32473 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:27,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:27,755 INFO L93 Difference]: Finished difference Result 10155 states and 32890 transitions. [2021-03-10 21:27:27,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:27:27,755 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:27:27,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:27,767 INFO L225 Difference]: With dead ends: 10155 [2021-03-10 21:27:27,767 INFO L226 Difference]: Without dead ends: 10151 [2021-03-10 21:27:27,768 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:27:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10151 states. [2021-03-10 21:27:27,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10151 to 9975. [2021-03-10 21:27:27,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.255564467615801) internal successors, (32471), 9974 states have internal predecessors, (32471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32471 transitions. [2021-03-10 21:27:27,886 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32471 transitions. Word has length 21 [2021-03-10 21:27:27,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:27,886 INFO L480 AbstractCegarLoop]: Abstraction has 9975 states and 32471 transitions. [2021-03-10 21:27:27,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:27,886 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32471 transitions. [2021-03-10 21:27:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:27,893 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:27,893 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:28,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3363 [2021-03-10 21:27:28,107 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:28,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:28,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1811243431, now seen corresponding path program 166 times [2021-03-10 21:27:28,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:28,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89626430] [2021-03-10 21:27:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:28,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89626430] [2021-03-10 21:27:28,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304333543] [2021-03-10 21:27:28,170 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 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:28,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:28,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:28,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:28,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:28,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:28,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-03-10 21:27:28,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559536178] [2021-03-10 21:27:28,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:28,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:28,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:28,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:28,223 INFO L87 Difference]: Start difference. First operand 9975 states and 32471 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-03-10 21:27:28,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:28,393 INFO L93 Difference]: Finished difference Result 10215 states and 32971 transitions. [2021-03-10 21:27:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:27:28,393 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-03-10 21:27:28,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:28,406 INFO L225 Difference]: With dead ends: 10215 [2021-03-10 21:27:28,406 INFO L226 Difference]: Without dead ends: 10211 [2021-03-10 21:27:28,406 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:28,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2021-03-10 21:27:28,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 9975. [2021-03-10 21:27:28,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.2551634249047523) internal successors, (32467), 9974 states have internal predecessors, (32467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:28,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32467 transitions. [2021-03-10 21:27:28,591 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32467 transitions. Word has length 21 [2021-03-10 21:27:28,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:28,591 INFO L480 AbstractCegarLoop]: Abstraction has 9975 states and 32467 transitions. [2021-03-10 21:27:28,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-03-10 21:27:28,591 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32467 transitions. [2021-03-10 21:27:28,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:28,596 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:28,596 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:28,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3364 [2021-03-10 21:27:28,797 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:28,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:28,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1389632277, now seen corresponding path program 167 times [2021-03-10 21:27:28,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:28,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451085828] [2021-03-10 21:27:28,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:28,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451085828] [2021-03-10 21:27:28,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439620692] [2021-03-10 21:27:28,869 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:28,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:27:28,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:28,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:28,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:28,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:28,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:27:28,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282624099] [2021-03-10 21:27:28,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:28,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:28,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:28,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:28,950 INFO L87 Difference]: Start difference. First operand 9975 states and 32467 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:27:29,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:29,164 INFO L93 Difference]: Finished difference Result 10242 states and 33109 transitions. [2021-03-10 21:27:29,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:27:29,165 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21 [2021-03-10 21:27:29,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:29,178 INFO L225 Difference]: With dead ends: 10242 [2021-03-10 21:27:29,178 INFO L226 Difference]: Without dead ends: 10237 [2021-03-10 21:27:29,178 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:27:29,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10237 states. [2021-03-10 21:27:29,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10237 to 9984. [2021-03-10 21:27:29,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9984 states, 9983 states have (on average 3.254332365020535) internal successors, (32488), 9983 states have internal predecessors, (32488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:29,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9984 states to 9984 states and 32488 transitions. [2021-03-10 21:27:29,331 INFO L78 Accepts]: Start accepts. Automaton has 9984 states and 32488 transitions. Word has length 21 [2021-03-10 21:27:29,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:29,332 INFO L480 AbstractCegarLoop]: Abstraction has 9984 states and 32488 transitions. [2021-03-10 21:27:29,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:27:29,332 INFO L276 IsEmpty]: Start isEmpty. Operand 9984 states and 32488 transitions. [2021-03-10 21:27:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:29,337 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:29,337 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:29,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3365,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:29,538 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:29,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:29,538 INFO L82 PathProgramCache]: Analyzing trace with hash 543786253, now seen corresponding path program 168 times [2021-03-10 21:27:29,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:29,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083314903] [2021-03-10 21:27:29,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:29,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083314903] [2021-03-10 21:27:29,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722449956] [2021-03-10 21:27:29,618 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:29,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:27:29,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:29,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:29,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:29,677 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:29,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:29,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:27:29,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043772216] [2021-03-10 21:27:29,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:29,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:29,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:29,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:29,678 INFO L87 Difference]: Start difference. First operand 9984 states and 32488 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:29,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:29,855 INFO L93 Difference]: Finished difference Result 10254 states and 33040 transitions. [2021-03-10 21:27:29,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:27:29,856 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21 [2021-03-10 21:27:29,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:29,868 INFO L225 Difference]: With dead ends: 10254 [2021-03-10 21:27:29,868 INFO L226 Difference]: Without dead ends: 10250 [2021-03-10 21:27:29,868 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:27:29,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10250 states. [2021-03-10 21:27:29,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10250 to 9984. [2021-03-10 21:27:29,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9984 states, 9983 states have (on average 3.253731343283582) internal successors, (32482), 9983 states have internal predecessors, (32482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:29,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9984 states to 9984 states and 32482 transitions. [2021-03-10 21:27:29,988 INFO L78 Accepts]: Start accepts. Automaton has 9984 states and 32482 transitions. Word has length 21 [2021-03-10 21:27:29,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:29,988 INFO L480 AbstractCegarLoop]: Abstraction has 9984 states and 32482 transitions. [2021-03-10 21:27:29,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:29,988 INFO L276 IsEmpty]: Start isEmpty. Operand 9984 states and 32482 transitions. [2021-03-10 21:27:29,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:29,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:29,993 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:30,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3366,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:30,193 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:30,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:30,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1637877841, now seen corresponding path program 169 times [2021-03-10 21:27:30,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:30,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675022681] [2021-03-10 21:27:30,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:30,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675022681] [2021-03-10 21:27:30,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850210486] [2021-03-10 21:27:30,263 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:30,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:30,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:30,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:30,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:30,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-03-10 21:27:30,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744688088] [2021-03-10 21:27:30,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:30,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:30,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:30,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:30,316 INFO L87 Difference]: Start difference. First operand 9984 states and 32482 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) [2021-03-10 21:27:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:30,498 INFO L93 Difference]: Finished difference Result 10346 states and 33347 transitions. [2021-03-10 21:27:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:27:30,499 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 21 [2021-03-10 21:27:30,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:30,513 INFO L225 Difference]: With dead ends: 10346 [2021-03-10 21:27:30,513 INFO L226 Difference]: Without dead ends: 10341 [2021-03-10 21:27:30,513 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:27:30,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10341 states. [2021-03-10 21:27:30,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10341 to 9986. [2021-03-10 21:27:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9986 states, 9985 states have (on average 3.25378067100651) internal successors, (32489), 9985 states have internal predecessors, (32489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:30,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 32489 transitions. [2021-03-10 21:27:30,636 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 32489 transitions. Word has length 21 [2021-03-10 21:27:30,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:30,636 INFO L480 AbstractCegarLoop]: Abstraction has 9986 states and 32489 transitions. [2021-03-10 21:27:30,636 INFO L481 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) [2021-03-10 21:27:30,636 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 32489 transitions. [2021-03-10 21:27:30,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:30,640 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:30,641 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:30,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3367 [2021-03-10 21:27:30,841 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:30,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:30,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1194978701, now seen corresponding path program 170 times [2021-03-10 21:27:30,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:30,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429865469] [2021-03-10 21:27:30,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:30,924 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:30,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429865469] [2021-03-10 21:27:30,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335690572] [2021-03-10 21:27:30,925 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:30,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:30,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:30,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:30,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:30,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:30,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-03-10 21:27:30,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199222414] [2021-03-10 21:27:30,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:30,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:30,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:30,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:30,987 INFO L87 Difference]: Start difference. First operand 9986 states and 32489 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) [2021-03-10 21:27:31,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:31,224 INFO L93 Difference]: Finished difference Result 10320 states and 33310 transitions. [2021-03-10 21:27:31,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:27:31,224 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 21 [2021-03-10 21:27:31,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:31,241 INFO L225 Difference]: With dead ends: 10320 [2021-03-10 21:27:31,241 INFO L226 Difference]: Without dead ends: 10314 [2021-03-10 21:27:31,242 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:27:31,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10314 states. [2021-03-10 21:27:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10314 to 9996. [2021-03-10 21:27:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9996 states, 9995 states have (on average 3.253126563281641) internal successors, (32515), 9995 states have internal predecessors, (32515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:31,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9996 states to 9996 states and 32515 transitions. [2021-03-10 21:27:31,417 INFO L78 Accepts]: Start accepts. Automaton has 9996 states and 32515 transitions. Word has length 21 [2021-03-10 21:27:31,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:31,417 INFO L480 AbstractCegarLoop]: Abstraction has 9996 states and 32515 transitions. [2021-03-10 21:27:31,417 INFO L481 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) [2021-03-10 21:27:31,417 INFO L276 IsEmpty]: Start isEmpty. Operand 9996 states and 32515 transitions. [2021-03-10 21:27:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:31,423 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:31,423 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:31,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3368,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:31,644 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:31,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:31,645 INFO L82 PathProgramCache]: Analyzing trace with hash 335261461, now seen corresponding path program 171 times [2021-03-10 21:27:31,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:31,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339570179] [2021-03-10 21:27:31,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:31,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339570179] [2021-03-10 21:27:31,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347406772] [2021-03-10 21:27:31,702 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:31,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:27:31,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:31,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:31,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:31,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:31,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:27:31,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330029762] [2021-03-10 21:27:31,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:27:31,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:31,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:27:31,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:27:31,764 INFO L87 Difference]: Start difference. First operand 9996 states and 32515 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:31,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:31,892 INFO L93 Difference]: Finished difference Result 10199 states and 32826 transitions. [2021-03-10 21:27:31,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:27:31,893 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:27:31,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:31,905 INFO L225 Difference]: With dead ends: 10199 [2021-03-10 21:27:31,906 INFO L226 Difference]: Without dead ends: 10199 [2021-03-10 21:27:31,906 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:31,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10199 states. [2021-03-10 21:27:32,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10199 to 10005. [2021-03-10 21:27:32,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.2531987205117954) internal successors, (32545), 10004 states have internal predecessors, (32545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:32,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32545 transitions. [2021-03-10 21:27:32,046 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32545 transitions. Word has length 21 [2021-03-10 21:27:32,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:32,046 INFO L480 AbstractCegarLoop]: Abstraction has 10005 states and 32545 transitions. [2021-03-10 21:27:32,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:32,046 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32545 transitions. [2021-03-10 21:27:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:32,052 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:32,052 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:32,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3369,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:32,253 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:32,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:32,253 INFO L82 PathProgramCache]: Analyzing trace with hash 2075353771, now seen corresponding path program 172 times [2021-03-10 21:27:32,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:32,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2629020] [2021-03-10 21:27:32,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:32,307 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:32,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2629020] [2021-03-10 21:27:32,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798335015] [2021-03-10 21:27:32,307 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:32,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:32,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:32,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:32,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:32,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:32,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-03-10 21:27:32,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535976782] [2021-03-10 21:27:32,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:32,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:32,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:32,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:32,367 INFO L87 Difference]: Start difference. First operand 10005 states and 32545 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:27:32,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:32,469 INFO L93 Difference]: Finished difference Result 10191 states and 32796 transitions. [2021-03-10 21:27:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:27:32,469 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-03-10 21:27:32,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:32,483 INFO L225 Difference]: With dead ends: 10191 [2021-03-10 21:27:32,483 INFO L226 Difference]: Without dead ends: 10191 [2021-03-10 21:27:32,483 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:27:32,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10191 states. [2021-03-10 21:27:32,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10191 to 10005. [2021-03-10 21:27:32,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.251799280287885) internal successors, (32531), 10004 states have internal predecessors, (32531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:32,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32531 transitions. [2021-03-10 21:27:32,623 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32531 transitions. Word has length 21 [2021-03-10 21:27:32,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:32,623 INFO L480 AbstractCegarLoop]: Abstraction has 10005 states and 32531 transitions. [2021-03-10 21:27:32,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:27:32,623 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32531 transitions. [2021-03-10 21:27:32,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:32,628 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:32,628 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:32,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3370,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:32,829 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:32,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:32,829 INFO L82 PathProgramCache]: Analyzing trace with hash -509000217, now seen corresponding path program 173 times [2021-03-10 21:27:32,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:32,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754221367] [2021-03-10 21:27:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:32,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754221367] [2021-03-10 21:27:32,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372498204] [2021-03-10 21:27:32,889 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:32,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:27:32,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:32,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:32,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:32,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:32,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-03-10 21:27:32,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781661058] [2021-03-10 21:27:32,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:32,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:32,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:32,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:32,946 INFO L87 Difference]: Start difference. First operand 10005 states and 32531 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:27:33,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:33,113 INFO L93 Difference]: Finished difference Result 10188 states and 32786 transitions. [2021-03-10 21:27:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:27:33,113 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-03-10 21:27:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:33,125 INFO L225 Difference]: With dead ends: 10188 [2021-03-10 21:27:33,125 INFO L226 Difference]: Without dead ends: 10186 [2021-03-10 21:27:33,125 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:33,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2021-03-10 21:27:33,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 10005. [2021-03-10 21:27:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.249000399840064) internal successors, (32503), 10004 states have internal predecessors, (32503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:33,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32503 transitions. [2021-03-10 21:27:33,246 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32503 transitions. Word has length 21 [2021-03-10 21:27:33,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:33,246 INFO L480 AbstractCegarLoop]: Abstraction has 10005 states and 32503 transitions. [2021-03-10 21:27:33,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:27:33,246 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32503 transitions. [2021-03-10 21:27:33,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:33,251 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:33,251 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:33,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3371 [2021-03-10 21:27:33,452 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:33,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:33,452 INFO L82 PathProgramCache]: Analyzing trace with hash 980404779, now seen corresponding path program 174 times [2021-03-10 21:27:33,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:33,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297653545] [2021-03-10 21:27:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:33,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297653545] [2021-03-10 21:27:33,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463315052] [2021-03-10 21:27:33,513 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:33,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:27:33,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:33,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:33,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:33,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:33,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:33,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749371352] [2021-03-10 21:27:33,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:33,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:33,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:33,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:33,575 INFO L87 Difference]: Start difference. First operand 10005 states and 32503 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:33,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:33,761 INFO L93 Difference]: Finished difference Result 10193 states and 32765 transitions. [2021-03-10 21:27:33,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:27:33,762 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21 [2021-03-10 21:27:33,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:33,774 INFO L225 Difference]: With dead ends: 10193 [2021-03-10 21:27:33,774 INFO L226 Difference]: Without dead ends: 10190 [2021-03-10 21:27:33,774 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:27:33,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10190 states. [2021-03-10 21:27:33,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10190 to 10005. [2021-03-10 21:27:33,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.2486005597760896) internal successors, (32499), 10004 states have internal predecessors, (32499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:33,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32499 transitions. [2021-03-10 21:27:33,899 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32499 transitions. Word has length 21 [2021-03-10 21:27:33,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:33,899 INFO L480 AbstractCegarLoop]: Abstraction has 10005 states and 32499 transitions. [2021-03-10 21:27:33,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:33,899 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32499 transitions. [2021-03-10 21:27:33,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:33,904 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:33,904 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:34,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3372 [2021-03-10 21:27:34,105 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:34,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:34,105 INFO L82 PathProgramCache]: Analyzing trace with hash -92680601, now seen corresponding path program 175 times [2021-03-10 21:27:34,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:34,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199745646] [2021-03-10 21:27:34,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:34,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:34,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199745646] [2021-03-10 21:27:34,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609108834] [2021-03-10 21:27:34,173 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:34,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:34,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:34,232 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:34,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:34,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:27:34,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850019901] [2021-03-10 21:27:34,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:34,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:34,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:34,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:34,233 INFO L87 Difference]: Start difference. First operand 10005 states and 32499 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:34,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:34,439 INFO L93 Difference]: Finished difference Result 10199 states and 32771 transitions. [2021-03-10 21:27:34,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:27:34,439 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-03-10 21:27:34,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:34,453 INFO L225 Difference]: With dead ends: 10199 [2021-03-10 21:27:34,453 INFO L226 Difference]: Without dead ends: 10195 [2021-03-10 21:27:34,453 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:27:34,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10195 states. [2021-03-10 21:27:34,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10195 to 10005. [2021-03-10 21:27:34,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.248200719712115) internal successors, (32495), 10004 states have internal predecessors, (32495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:34,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32495 transitions. [2021-03-10 21:27:34,636 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32495 transitions. Word has length 21 [2021-03-10 21:27:34,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:34,636 INFO L480 AbstractCegarLoop]: Abstraction has 10005 states and 32495 transitions. [2021-03-10 21:27:34,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:34,636 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32495 transitions. [2021-03-10 21:27:34,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:34,640 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:34,640 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:34,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3373 [2021-03-10 21:27:34,840 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:34,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:34,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1001410987, now seen corresponding path program 176 times [2021-03-10 21:27:34,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:34,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271328385] [2021-03-10 21:27:34,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:34,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271328385] [2021-03-10 21:27:34,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867543521] [2021-03-10 21:27:34,909 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:34,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:34,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:34,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:34,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:34,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:34,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:27:34,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793282674] [2021-03-10 21:27:34,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:34,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:34,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:34,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:34,971 INFO L87 Difference]: Start difference. First operand 10005 states and 32495 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:35,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:35,178 INFO L93 Difference]: Finished difference Result 10440 states and 33536 transitions. [2021-03-10 21:27:35,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:27:35,178 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-03-10 21:27:35,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:35,190 INFO L225 Difference]: With dead ends: 10440 [2021-03-10 21:27:35,191 INFO L226 Difference]: Without dead ends: 10435 [2021-03-10 21:27:35,191 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:35,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-03-10 21:27:35,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 10008. [2021-03-10 21:27:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10008 states, 10007 states have (on average 3.2482262416308583) internal successors, (32505), 10007 states have internal predecessors, (32505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:35,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10008 states to 10008 states and 32505 transitions. [2021-03-10 21:27:35,314 INFO L78 Accepts]: Start accepts. Automaton has 10008 states and 32505 transitions. Word has length 21 [2021-03-10 21:27:35,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:35,314 INFO L480 AbstractCegarLoop]: Abstraction has 10008 states and 32505 transitions. [2021-03-10 21:27:35,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:35,315 INFO L276 IsEmpty]: Start isEmpty. Operand 10008 states and 32505 transitions. [2021-03-10 21:27:35,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:35,319 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:35,319 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:35,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3374 [2021-03-10 21:27:35,520 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:35,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:35,520 INFO L82 PathProgramCache]: Analyzing trace with hash 558511847, now seen corresponding path program 177 times [2021-03-10 21:27:35,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:35,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371508535] [2021-03-10 21:27:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:35,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371508535] [2021-03-10 21:27:35,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136637841] [2021-03-10 21:27:35,593 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:35,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:27:35,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:35,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:35,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:35,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:35,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:27:35,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999834751] [2021-03-10 21:27:35,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:35,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:35,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:35,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:35,657 INFO L87 Difference]: Start difference. First operand 10008 states and 32505 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-03-10 21:27:35,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:35,865 INFO L93 Difference]: Finished difference Result 10434 states and 33526 transitions. [2021-03-10 21:27:35,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:27:35,866 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 21 [2021-03-10 21:27:35,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:35,878 INFO L225 Difference]: With dead ends: 10434 [2021-03-10 21:27:35,878 INFO L226 Difference]: Without dead ends: 10428 [2021-03-10 21:27:35,878 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:35,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10428 states. [2021-03-10 21:27:35,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10428 to 10011. [2021-03-10 21:27:35,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10011 states, 10010 states have (on average 3.2482517482517483) internal successors, (32515), 10010 states have internal predecessors, (32515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:36,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10011 states to 10011 states and 32515 transitions. [2021-03-10 21:27:36,004 INFO L78 Accepts]: Start accepts. Automaton has 10011 states and 32515 transitions. Word has length 21 [2021-03-10 21:27:36,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:36,004 INFO L480 AbstractCegarLoop]: Abstraction has 10011 states and 32515 transitions. [2021-03-10 21:27:36,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-03-10 21:27:36,004 INFO L276 IsEmpty]: Start isEmpty. Operand 10011 states and 32515 transitions. [2021-03-10 21:27:36,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:36,009 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:36,009 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:36,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3375 [2021-03-10 21:27:36,210 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:36,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:36,210 INFO L82 PathProgramCache]: Analyzing trace with hash -286459605, now seen corresponding path program 178 times [2021-03-10 21:27:36,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:36,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276724581] [2021-03-10 21:27:36,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:36,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:36,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276724581] [2021-03-10 21:27:36,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163214418] [2021-03-10 21:27:36,289 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:36,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:36,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:36,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:36,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:36,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:36,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:27:36,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076197735] [2021-03-10 21:27:36,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:36,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:36,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:36,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:36,350 INFO L87 Difference]: Start difference. First operand 10011 states and 32515 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:36,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:36,561 INFO L93 Difference]: Finished difference Result 10403 states and 33484 transitions. [2021-03-10 21:27:36,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:27:36,561 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-03-10 21:27:36,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:36,573 INFO L225 Difference]: With dead ends: 10403 [2021-03-10 21:27:36,574 INFO L226 Difference]: Without dead ends: 10396 [2021-03-10 21:27:36,574 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:36,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10396 states. [2021-03-10 21:27:36,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10396 to 10027. [2021-03-10 21:27:36,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10027 states, 10026 states have (on average 3.246658687412727) internal successors, (32551), 10026 states have internal predecessors, (32551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10027 states to 10027 states and 32551 transitions. [2021-03-10 21:27:36,697 INFO L78 Accepts]: Start accepts. Automaton has 10027 states and 32551 transitions. Word has length 21 [2021-03-10 21:27:36,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:36,697 INFO L480 AbstractCegarLoop]: Abstraction has 10027 states and 32551 transitions. [2021-03-10 21:27:36,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:36,697 INFO L276 IsEmpty]: Start isEmpty. Operand 10027 states and 32551 transitions. [2021-03-10 21:27:36,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:36,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:36,702 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:36,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3376,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:36,903 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:36,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:36,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1337942037, now seen corresponding path program 179 times [2021-03-10 21:27:36,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:36,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187647901] [2021-03-10 21:27:36,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:36,957 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:36,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187647901] [2021-03-10 21:27:36,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377968710] [2021-03-10 21:27:36,957 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:36,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:27:36,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:36,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:36,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:27:37,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:37,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-03-10 21:27:37,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764605081] [2021-03-10 21:27:37,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:37,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:37,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:37,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:37,047 INFO L87 Difference]: Start difference. First operand 10027 states and 32551 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-03-10 21:27:37,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:37,190 INFO L93 Difference]: Finished difference Result 10268 states and 33007 transitions. [2021-03-10 21:27:37,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:27:37,190 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 21 [2021-03-10 21:27:37,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:37,202 INFO L225 Difference]: With dead ends: 10268 [2021-03-10 21:27:37,202 INFO L226 Difference]: Without dead ends: 10268 [2021-03-10 21:27:37,202 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:27:37,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10268 states. [2021-03-10 21:27:37,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10268 to 10029. [2021-03-10 21:27:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.2461108895093735) internal successors, (32552), 10028 states have internal predecessors, (32552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:37,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32552 transitions. [2021-03-10 21:27:37,322 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32552 transitions. Word has length 21 [2021-03-10 21:27:37,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:37,322 INFO L480 AbstractCegarLoop]: Abstraction has 10029 states and 32552 transitions. [2021-03-10 21:27:37,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-03-10 21:27:37,323 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32552 transitions. [2021-03-10 21:27:37,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:37,328 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:37,328 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:37,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3377,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:37,528 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:37,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:37,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1308049587, now seen corresponding path program 180 times [2021-03-10 21:27:37,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:37,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235108287] [2021-03-10 21:27:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:37,590 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:37,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235108287] [2021-03-10 21:27:37,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852748657] [2021-03-10 21:27:37,590 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 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:37,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:27:37,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:37,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:37,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:37,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:37,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-03-10 21:27:37,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883722314] [2021-03-10 21:27:37,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:37,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:37,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:37,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:37,656 INFO L87 Difference]: Start difference. First operand 10029 states and 32552 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-03-10 21:27:37,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:37,833 INFO L93 Difference]: Finished difference Result 10257 states and 33080 transitions. [2021-03-10 21:27:37,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:27:37,833 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-03-10 21:27:37,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:37,845 INFO L225 Difference]: With dead ends: 10257 [2021-03-10 21:27:37,846 INFO L226 Difference]: Without dead ends: 10252 [2021-03-10 21:27:37,846 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10252 states. [2021-03-10 21:27:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10252 to 10029. [2021-03-10 21:27:37,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.245911447945752) internal successors, (32550), 10028 states have internal predecessors, (32550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32550 transitions. [2021-03-10 21:27:37,970 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32550 transitions. Word has length 21 [2021-03-10 21:27:37,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:37,970 INFO L480 AbstractCegarLoop]: Abstraction has 10029 states and 32550 transitions. [2021-03-10 21:27:37,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-03-10 21:27:37,970 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32550 transitions. [2021-03-10 21:27:37,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:37,975 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:37,976 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:38,176 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3378,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:38,176 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:38,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:38,176 INFO L82 PathProgramCache]: Analyzing trace with hash 40592409, now seen corresponding path program 181 times [2021-03-10 21:27:38,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:38,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894799784] [2021-03-10 21:27:38,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:38,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894799784] [2021-03-10 21:27:38,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962125423] [2021-03-10 21:27:38,244 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:38,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:38,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:38,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:38,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-03-10 21:27:38,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708764334] [2021-03-10 21:27:38,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:38,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:38,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:38,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:38,299 INFO L87 Difference]: Start difference. First operand 10029 states and 32550 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) [2021-03-10 21:27:38,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:38,480 INFO L93 Difference]: Finished difference Result 10339 states and 33223 transitions. [2021-03-10 21:27:38,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:27:38,480 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 21 [2021-03-10 21:27:38,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:38,491 INFO L225 Difference]: With dead ends: 10339 [2021-03-10 21:27:38,492 INFO L226 Difference]: Without dead ends: 10334 [2021-03-10 21:27:38,492 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:27:38,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10334 states. [2021-03-10 21:27:38,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10334 to 10029. [2021-03-10 21:27:38,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.245512564818508) internal successors, (32546), 10028 states have internal predecessors, (32546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32546 transitions. [2021-03-10 21:27:38,611 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32546 transitions. Word has length 21 [2021-03-10 21:27:38,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:38,611 INFO L480 AbstractCegarLoop]: Abstraction has 10029 states and 32546 transitions. [2021-03-10 21:27:38,611 INFO L481 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) [2021-03-10 21:27:38,611 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32546 transitions. [2021-03-10 21:27:38,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:38,616 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:38,616 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:38,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3379 [2021-03-10 21:27:38,816 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:38,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:38,816 INFO L82 PathProgramCache]: Analyzing trace with hash -402306731, now seen corresponding path program 182 times [2021-03-10 21:27:38,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:38,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023978083] [2021-03-10 21:27:38,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:38,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023978083] [2021-03-10 21:27:38,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407637909] [2021-03-10 21:27:38,887 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:38,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:38,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:38,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:38,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:38,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:38,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-03-10 21:27:38,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914224898] [2021-03-10 21:27:38,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:38,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:38,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:38,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:38,941 INFO L87 Difference]: Start difference. First operand 10029 states and 32546 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) [2021-03-10 21:27:39,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:39,142 INFO L93 Difference]: Finished difference Result 10400 states and 33463 transitions. [2021-03-10 21:27:39,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:27:39,142 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 21 [2021-03-10 21:27:39,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:39,155 INFO L225 Difference]: With dead ends: 10400 [2021-03-10 21:27:39,155 INFO L226 Difference]: Without dead ends: 10394 [2021-03-10 21:27:39,155 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:27:39,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10394 states. [2021-03-10 21:27:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10394 to 10047. [2021-03-10 21:27:39,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 3.244873581524985) internal successors, (32598), 10046 states have internal predecessors, (32598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 32598 transitions. [2021-03-10 21:27:39,283 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 32598 transitions. Word has length 21 [2021-03-10 21:27:39,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:39,283 INFO L480 AbstractCegarLoop]: Abstraction has 10047 states and 32598 transitions. [2021-03-10 21:27:39,283 INFO L481 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) [2021-03-10 21:27:39,284 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 32598 transitions. [2021-03-10 21:27:39,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:39,289 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:39,289 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:39,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3380 [2021-03-10 21:27:39,489 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:39,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:39,489 INFO L82 PathProgramCache]: Analyzing trace with hash -595874445, now seen corresponding path program 183 times [2021-03-10 21:27:39,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:39,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774670027] [2021-03-10 21:27:39,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:39,562 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:39,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774670027] [2021-03-10 21:27:39,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365045353] [2021-03-10 21:27:39,562 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:39,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:27:39,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:39,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:39,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:39,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:39,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:27:39,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736249556] [2021-03-10 21:27:39,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:39,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:39,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:39,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:39,644 INFO L87 Difference]: Start difference. First operand 10047 states and 32598 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-03-10 21:27:39,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:39,837 INFO L93 Difference]: Finished difference Result 10336 states and 33135 transitions. [2021-03-10 21:27:39,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:27:39,838 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 21 [2021-03-10 21:27:39,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:39,849 INFO L225 Difference]: With dead ends: 10336 [2021-03-10 21:27:39,850 INFO L226 Difference]: Without dead ends: 10331 [2021-03-10 21:27:39,850 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:27:39,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10331 states. [2021-03-10 21:27:39,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10331 to 10047. [2021-03-10 21:27:39,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 3.244574955206052) internal successors, (32595), 10046 states have internal predecessors, (32595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 32595 transitions. [2021-03-10 21:27:39,975 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 32595 transitions. Word has length 21 [2021-03-10 21:27:39,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:39,975 INFO L480 AbstractCegarLoop]: Abstraction has 10047 states and 32595 transitions. [2021-03-10 21:27:39,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-03-10 21:27:39,975 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 32595 transitions. [2021-03-10 21:27:39,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:39,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:39,980 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:40,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3381 [2021-03-10 21:27:40,181 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:40,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:40,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1038773585, now seen corresponding path program 184 times [2021-03-10 21:27:40,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:40,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225403117] [2021-03-10 21:27:40,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:40,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225403117] [2021-03-10 21:27:40,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561623667] [2021-03-10 21:27:40,252 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:40,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:40,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:40,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:40,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:40,313 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:40,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:40,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:27:40,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453042849] [2021-03-10 21:27:40,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:40,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:40,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:40,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:40,313 INFO L87 Difference]: Start difference. First operand 10047 states and 32595 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:40,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:40,536 INFO L93 Difference]: Finished difference Result 10532 states and 33761 transitions. [2021-03-10 21:27:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:27:40,537 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-03-10 21:27:40,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:40,551 INFO L225 Difference]: With dead ends: 10532 [2021-03-10 21:27:40,551 INFO L226 Difference]: Without dead ends: 10526 [2021-03-10 21:27:40,551 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:27:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10526 states. [2021-03-10 21:27:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10526 to 10055. [2021-03-10 21:27:40,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10055 states, 10054 states have (on average 3.244778197732246) internal successors, (32623), 10054 states have internal predecessors, (32623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:40,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10055 states to 10055 states and 32623 transitions. [2021-03-10 21:27:40,713 INFO L78 Accepts]: Start accepts. Automaton has 10055 states and 32623 transitions. Word has length 21 [2021-03-10 21:27:40,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:40,713 INFO L480 AbstractCegarLoop]: Abstraction has 10055 states and 32623 transitions. [2021-03-10 21:27:40,713 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:40,713 INFO L276 IsEmpty]: Start isEmpty. Operand 10055 states and 32623 transitions. [2021-03-10 21:27:40,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:40,719 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:40,719 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:40,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3382,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:40,919 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:40,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:40,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1883745037, now seen corresponding path program 185 times [2021-03-10 21:27:40,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:40,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164779668] [2021-03-10 21:27:40,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:40,994 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:40,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164779668] [2021-03-10 21:27:40,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776606061] [2021-03-10 21:27:40,995 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:41,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:27:41,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:41,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:41,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:41,058 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:41,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:41,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:27:41,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218137155] [2021-03-10 21:27:41,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:41,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:41,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:41,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:41,058 INFO L87 Difference]: Start difference. First operand 10055 states and 32623 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:41,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:41,260 INFO L93 Difference]: Finished difference Result 10492 states and 33704 transitions. [2021-03-10 21:27:41,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:27:41,261 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-03-10 21:27:41,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:41,273 INFO L225 Difference]: With dead ends: 10492 [2021-03-10 21:27:41,273 INFO L226 Difference]: Without dead ends: 10485 [2021-03-10 21:27:41,274 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:27:41,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10485 states. [2021-03-10 21:27:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10485 to 10067. [2021-03-10 21:27:41,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10067 states, 10066 states have (on average 3.2445857341545796) internal successors, (32660), 10066 states have internal predecessors, (32660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:41,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10067 states to 10067 states and 32660 transitions. [2021-03-10 21:27:41,400 INFO L78 Accepts]: Start accepts. Automaton has 10067 states and 32660 transitions. Word has length 21 [2021-03-10 21:27:41,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:41,400 INFO L480 AbstractCegarLoop]: Abstraction has 10067 states and 32660 transitions. [2021-03-10 21:27:41,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:41,400 INFO L276 IsEmpty]: Start isEmpty. Operand 10067 states and 32660 transitions. [2021-03-10 21:27:41,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:41,405 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:41,405 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:41,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3383,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:41,605 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:41,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:41,605 INFO L82 PathProgramCache]: Analyzing trace with hash 482340035, now seen corresponding path program 186 times [2021-03-10 21:27:41,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:41,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375724476] [2021-03-10 21:27:41,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:41,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:41,659 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:41,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375724476] [2021-03-10 21:27:41,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670715307] [2021-03-10 21:27:41,659 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:41,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:27:41,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:41,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:41,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:41,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:41,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:27:41,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464943844] [2021-03-10 21:27:41,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:27:41,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:41,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:27:41,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:27:41,720 INFO L87 Difference]: Start difference. First operand 10067 states and 32660 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:41,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:41,808 INFO L93 Difference]: Finished difference Result 10308 states and 33030 transitions. [2021-03-10 21:27:41,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:27:41,808 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:27:41,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:41,823 INFO L225 Difference]: With dead ends: 10308 [2021-03-10 21:27:41,823 INFO L226 Difference]: Without dead ends: 10308 [2021-03-10 21:27:41,823 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:41,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10308 states. [2021-03-10 21:27:41,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10308 to 10076. [2021-03-10 21:27:41,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2450620347394543) internal successors, (32694), 10075 states have internal predecessors, (32694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:41,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32694 transitions. [2021-03-10 21:27:41,966 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32694 transitions. Word has length 21 [2021-03-10 21:27:41,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:41,966 INFO L480 AbstractCegarLoop]: Abstraction has 10076 states and 32694 transitions. [2021-03-10 21:27:41,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:41,966 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32694 transitions. [2021-03-10 21:27:41,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:41,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:41,971 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:42,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3384 [2021-03-10 21:27:42,172 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:42,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:42,172 INFO L82 PathProgramCache]: Analyzing trace with hash -2072534951, now seen corresponding path program 187 times [2021-03-10 21:27:42,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:42,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951855477] [2021-03-10 21:27:42,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:42,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:42,227 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:42,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951855477] [2021-03-10 21:27:42,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233733987] [2021-03-10 21:27:42,228 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:42,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:42,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:42,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:42,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-03-10 21:27:42,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524976388] [2021-03-10 21:27:42,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:42,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:42,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:42,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:42,288 INFO L87 Difference]: Start difference. First operand 10076 states and 32694 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:27:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:42,387 INFO L93 Difference]: Finished difference Result 10304 states and 33012 transitions. [2021-03-10 21:27:42,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:27:42,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-03-10 21:27:42,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:42,399 INFO L225 Difference]: With dead ends: 10304 [2021-03-10 21:27:42,400 INFO L226 Difference]: Without dead ends: 10304 [2021-03-10 21:27:42,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10304 states. [2021-03-10 21:27:42,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10304 to 10076. [2021-03-10 21:27:42,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2442679900744418) internal successors, (32686), 10075 states have internal predecessors, (32686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:42,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32686 transitions. [2021-03-10 21:27:42,521 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32686 transitions. Word has length 21 [2021-03-10 21:27:42,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:42,521 INFO L480 AbstractCegarLoop]: Abstraction has 10076 states and 32686 transitions. [2021-03-10 21:27:42,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:27:42,522 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32686 transitions. [2021-03-10 21:27:42,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:42,526 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:42,526 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:42,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3385,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:42,728 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:42,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:42,728 INFO L82 PathProgramCache]: Analyzing trace with hash -361921643, now seen corresponding path program 188 times [2021-03-10 21:27:42,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:42,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149750478] [2021-03-10 21:27:42,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:42,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149750478] [2021-03-10 21:27:42,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494515334] [2021-03-10 21:27:42,788 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:42,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:42,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:42,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:42,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:42,841 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:42,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:42,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-03-10 21:27:42,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361462485] [2021-03-10 21:27:42,841 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:42,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:42,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:42,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:42,842 INFO L87 Difference]: Start difference. First operand 10076 states and 32686 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:27:43,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:43,015 INFO L93 Difference]: Finished difference Result 10301 states and 33002 transitions. [2021-03-10 21:27:43,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:27:43,016 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-03-10 21:27:43,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:43,028 INFO L225 Difference]: With dead ends: 10301 [2021-03-10 21:27:43,028 INFO L226 Difference]: Without dead ends: 10299 [2021-03-10 21:27:43,028 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:43,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10299 states. [2021-03-10 21:27:43,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10299 to 10076. [2021-03-10 21:27:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2425806451612904) internal successors, (32669), 10075 states have internal predecessors, (32669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32669 transitions. [2021-03-10 21:27:43,156 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32669 transitions. Word has length 21 [2021-03-10 21:27:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:43,156 INFO L480 AbstractCegarLoop]: Abstraction has 10076 states and 32669 transitions. [2021-03-10 21:27:43,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:27:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32669 transitions. [2021-03-10 21:27:43,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:43,162 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:43,162 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:43,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3386 [2021-03-10 21:27:43,367 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:43,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:43,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1127483353, now seen corresponding path program 189 times [2021-03-10 21:27:43,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:43,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815653145] [2021-03-10 21:27:43,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:43,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:43,428 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:43,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815653145] [2021-03-10 21:27:43,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822246064] [2021-03-10 21:27:43,428 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:43,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:27:43,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:43,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:43,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:43,562 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:43,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:43,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:43,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736733672] [2021-03-10 21:27:43,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:43,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:43,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:43,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:43,563 INFO L87 Difference]: Start difference. First operand 10076 states and 32669 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:43,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:43,756 INFO L93 Difference]: Finished difference Result 10306 states and 32992 transitions. [2021-03-10 21:27:43,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:27:43,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21 [2021-03-10 21:27:43,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:43,769 INFO L225 Difference]: With dead ends: 10306 [2021-03-10 21:27:43,769 INFO L226 Difference]: Without dead ends: 10303 [2021-03-10 21:27:43,769 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:27:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10303 states. [2021-03-10 21:27:43,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10303 to 10076. [2021-03-10 21:27:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2422828784119107) internal successors, (32666), 10075 states have internal predecessors, (32666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:43,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32666 transitions. [2021-03-10 21:27:43,896 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32666 transitions. Word has length 21 [2021-03-10 21:27:43,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:43,897 INFO L480 AbstractCegarLoop]: Abstraction has 10076 states and 32666 transitions. [2021-03-10 21:27:43,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:43,897 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32666 transitions. [2021-03-10 21:27:43,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:43,902 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:43,902 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:44,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:44,102 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:44,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:44,103 INFO L82 PathProgramCache]: Analyzing trace with hash 54397973, now seen corresponding path program 190 times [2021-03-10 21:27:44,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:44,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166202351] [2021-03-10 21:27:44,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:44,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:44,167 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:44,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166202351] [2021-03-10 21:27:44,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232623126] [2021-03-10 21:27:44,168 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:44,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:44,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:44,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:44,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:44,233 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:44,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:44,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:27:44,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059123321] [2021-03-10 21:27:44,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:44,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:44,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:44,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:44,234 INFO L87 Difference]: Start difference. First operand 10076 states and 32666 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) [2021-03-10 21:27:44,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:44,392 INFO L93 Difference]: Finished difference Result 11212 states and 35976 transitions. [2021-03-10 21:27:44,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:27:44,392 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 21 [2021-03-10 21:27:44,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:44,406 INFO L225 Difference]: With dead ends: 11212 [2021-03-10 21:27:44,406 INFO L226 Difference]: Without dead ends: 11208 [2021-03-10 21:27:44,406 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:44,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2021-03-10 21:27:44,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 10076. [2021-03-10 21:27:44,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.241985111662531) internal successors, (32663), 10075 states have internal predecessors, (32663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:44,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32663 transitions. [2021-03-10 21:27:44,536 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32663 transitions. Word has length 21 [2021-03-10 21:27:44,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:44,536 INFO L480 AbstractCegarLoop]: Abstraction has 10076 states and 32663 transitions. [2021-03-10 21:27:44,536 INFO L481 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) [2021-03-10 21:27:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32663 transitions. [2021-03-10 21:27:44,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:44,541 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:44,541 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:44,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3388,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:44,742 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:44,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:44,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1148489561, now seen corresponding path program 191 times [2021-03-10 21:27:44,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:44,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437008039] [2021-03-10 21:27:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:44,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:44,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437008039] [2021-03-10 21:27:44,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885800188] [2021-03-10 21:27:44,812 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:44,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:27:44,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:44,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:44,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:44,879 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:44,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:44,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:27:44,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830980020] [2021-03-10 21:27:44,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:44,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:44,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:44,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:44,880 INFO L87 Difference]: Start difference. First operand 10076 states and 32663 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:45,063 INFO L93 Difference]: Finished difference Result 11223 states and 35989 transitions. [2021-03-10 21:27:45,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:27:45,064 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-03-10 21:27:45,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:45,078 INFO L225 Difference]: With dead ends: 11223 [2021-03-10 21:27:45,078 INFO L226 Difference]: Without dead ends: 11218 [2021-03-10 21:27:45,079 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:27:45,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11218 states. [2021-03-10 21:27:45,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11218 to 10154. [2021-03-10 21:27:45,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.2445582586427655) internal successors, (32942), 10153 states have internal predecessors, (32942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32942 transitions. [2021-03-10 21:27:45,215 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32942 transitions. Word has length 21 [2021-03-10 21:27:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:45,215 INFO L480 AbstractCegarLoop]: Abstraction has 10154 states and 32942 transitions. [2021-03-10 21:27:45,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32942 transitions. [2021-03-10 21:27:45,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:45,220 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:45,220 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:45,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3389,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:45,421 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:45,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:45,421 INFO L82 PathProgramCache]: Analyzing trace with hash 705590421, now seen corresponding path program 192 times [2021-03-10 21:27:45,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:45,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655584783] [2021-03-10 21:27:45,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:45,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655584783] [2021-03-10 21:27:45,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136682751] [2021-03-10 21:27:45,498 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:45,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:27:45,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:45,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:45,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:45,561 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:45,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:45,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:27:45,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343153612] [2021-03-10 21:27:45,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:45,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:45,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:45,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:45,562 INFO L87 Difference]: Start difference. First operand 10154 states and 32942 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:45,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:45,719 INFO L93 Difference]: Finished difference Result 10405 states and 33574 transitions. [2021-03-10 21:27:45,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:27:45,720 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-03-10 21:27:45,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:45,735 INFO L225 Difference]: With dead ends: 10405 [2021-03-10 21:27:45,735 INFO L226 Difference]: Without dead ends: 10400 [2021-03-10 21:27:45,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:27:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10400 states. [2021-03-10 21:27:45,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10400 to 10154. [2021-03-10 21:27:45,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244459765586526) internal successors, (32941), 10153 states have internal predecessors, (32941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:45,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32941 transitions. [2021-03-10 21:27:45,868 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32941 transitions. Word has length 21 [2021-03-10 21:27:45,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:45,868 INFO L480 AbstractCegarLoop]: Abstraction has 10154 states and 32941 transitions. [2021-03-10 21:27:45,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:45,868 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32941 transitions. [2021-03-10 21:27:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:45,873 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:45,873 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:46,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3390,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:46,074 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:46,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:46,074 INFO L82 PathProgramCache]: Analyzing trace with hash -139381031, now seen corresponding path program 193 times [2021-03-10 21:27:46,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:46,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049639933] [2021-03-10 21:27:46,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:46,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:46,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049639933] [2021-03-10 21:27:46,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789014403] [2021-03-10 21:27:46,177 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:46,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:46,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:46,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:46,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:27:46,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753429075] [2021-03-10 21:27:46,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:46,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:46,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:46,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:46,243 INFO L87 Difference]: Start difference. First operand 10154 states and 32941 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:46,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:46,404 INFO L93 Difference]: Finished difference Result 10382 states and 33519 transitions. [2021-03-10 21:27:46,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:27:46,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-03-10 21:27:46,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:46,416 INFO L225 Difference]: With dead ends: 10382 [2021-03-10 21:27:46,416 INFO L226 Difference]: Without dead ends: 10376 [2021-03-10 21:27:46,417 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 151.1ms TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:27:46,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10376 states. [2021-03-10 21:27:46,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10376 to 10154. [2021-03-10 21:27:46,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244361272530287) internal successors, (32940), 10153 states have internal predecessors, (32940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:46,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32940 transitions. [2021-03-10 21:27:46,573 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32940 transitions. Word has length 21 [2021-03-10 21:27:46,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:46,574 INFO L480 AbstractCegarLoop]: Abstraction has 10154 states and 32940 transitions. [2021-03-10 21:27:46,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:46,574 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32940 transitions. [2021-03-10 21:27:46,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:46,579 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:46,579 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:46,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3391 [2021-03-10 21:27:46,779 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:46,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:46,779 INFO L82 PathProgramCache]: Analyzing trace with hash -563692267, now seen corresponding path program 194 times [2021-03-10 21:27:46,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:46,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110308752] [2021-03-10 21:27:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:46,902 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:46,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110308752] [2021-03-10 21:27:46,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710360436] [2021-03-10 21:27:46,902 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:46,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:46,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:46,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:46,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:46,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:46,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:27:46,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247754862] [2021-03-10 21:27:46,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:46,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:46,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:46,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:46,975 INFO L87 Difference]: Start difference. First operand 10154 states and 32940 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:47,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:47,173 INFO L93 Difference]: Finished difference Result 10354 states and 33463 transitions. [2021-03-10 21:27:47,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:27:47,174 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-03-10 21:27:47,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:47,195 INFO L225 Difference]: With dead ends: 10354 [2021-03-10 21:27:47,195 INFO L226 Difference]: Without dead ends: 10347 [2021-03-10 21:27:47,195 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:27:47,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10347 states. [2021-03-10 21:27:47,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10347 to 10154. [2021-03-10 21:27:47,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244262779474047) internal successors, (32939), 10153 states have internal predecessors, (32939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32939 transitions. [2021-03-10 21:27:47,321 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32939 transitions. Word has length 21 [2021-03-10 21:27:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:47,321 INFO L480 AbstractCegarLoop]: Abstraction has 10154 states and 32939 transitions. [2021-03-10 21:27:47,321 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:47,321 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32939 transitions. [2021-03-10 21:27:47,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:47,327 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:47,327 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:47,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-03-10 21:27:47,527 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:47,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:47,528 INFO L82 PathProgramCache]: Analyzing trace with hash -933266099, now seen corresponding path program 195 times [2021-03-10 21:27:47,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:47,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940982730] [2021-03-10 21:27:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:47,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940982730] [2021-03-10 21:27:47,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239178775] [2021-03-10 21:27:47,588 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:47,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:27:47,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:47,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:47,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:47,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:47,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:27:47,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162739404] [2021-03-10 21:27:47,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:47,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:47,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:47,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:47,651 INFO L87 Difference]: Start difference. First operand 10154 states and 32939 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:27:47,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:47,779 INFO L93 Difference]: Finished difference Result 10360 states and 33271 transitions. [2021-03-10 21:27:47,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:27:47,779 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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 21 [2021-03-10 21:27:47,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:47,791 INFO L225 Difference]: With dead ends: 10360 [2021-03-10 21:27:47,791 INFO L226 Difference]: Without dead ends: 10360 [2021-03-10 21:27:47,792 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:27:47,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10360 states. [2021-03-10 21:27:47,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10360 to 10157. [2021-03-10 21:27:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.2441906262307993) internal successors, (32948), 10156 states have internal predecessors, (32948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:47,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32948 transitions. [2021-03-10 21:27:47,920 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32948 transitions. Word has length 21 [2021-03-10 21:27:47,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:47,920 INFO L480 AbstractCegarLoop]: Abstraction has 10157 states and 32948 transitions. [2021-03-10 21:27:47,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 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) [2021-03-10 21:27:47,920 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32948 transitions. [2021-03-10 21:27:47,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:47,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:47,925 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:48,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3393 [2021-03-10 21:27:48,127 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:48,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:48,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1621452429, now seen corresponding path program 196 times [2021-03-10 21:27:48,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:48,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032502806] [2021-03-10 21:27:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:48,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:48,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032502806] [2021-03-10 21:27:48,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009130203] [2021-03-10 21:27:48,198 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:48,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:48,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:48,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:48,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:48,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:48,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-03-10 21:27:48,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954128698] [2021-03-10 21:27:48,252 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:48,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:48,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:48,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:48,252 INFO L87 Difference]: Start difference. First operand 10157 states and 32948 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) [2021-03-10 21:27:48,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:48,423 INFO L93 Difference]: Finished difference Result 10425 states and 33574 transitions. [2021-03-10 21:27:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:27:48,424 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 21 [2021-03-10 21:27:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:48,436 INFO L225 Difference]: With dead ends: 10425 [2021-03-10 21:27:48,436 INFO L226 Difference]: Without dead ends: 10419 [2021-03-10 21:27:48,437 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 131.9ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:27:48,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10419 states. [2021-03-10 21:27:48,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10419 to 10157. [2021-03-10 21:27:48,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.24399369830642) internal successors, (32946), 10156 states have internal predecessors, (32946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32946 transitions. [2021-03-10 21:27:48,564 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32946 transitions. Word has length 21 [2021-03-10 21:27:48,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:48,564 INFO L480 AbstractCegarLoop]: Abstraction has 10157 states and 32946 transitions. [2021-03-10 21:27:48,564 INFO L481 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) [2021-03-10 21:27:48,564 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32946 transitions. [2021-03-10 21:27:48,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:48,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:48,570 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:48,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3394 [2021-03-10 21:27:48,771 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:48,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:48,771 INFO L82 PathProgramCache]: Analyzing trace with hash 984985575, now seen corresponding path program 197 times [2021-03-10 21:27:48,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:48,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583018697] [2021-03-10 21:27:48,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:48,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583018697] [2021-03-10 21:27:48,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911057305] [2021-03-10 21:27:48,843 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:48,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:27:48,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:48,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:48,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:48,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:48,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:27:48,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358657815] [2021-03-10 21:27:48,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:48,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:48,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:48,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:48,909 INFO L87 Difference]: Start difference. First operand 10157 states and 32946 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-03-10 21:27:49,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:49,094 INFO L93 Difference]: Finished difference Result 10525 states and 33745 transitions. [2021-03-10 21:27:49,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:27:49,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 21 [2021-03-10 21:27:49,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:49,107 INFO L225 Difference]: With dead ends: 10525 [2021-03-10 21:27:49,107 INFO L226 Difference]: Without dead ends: 10519 [2021-03-10 21:27:49,107 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:27:49,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10519 states. [2021-03-10 21:27:49,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10519 to 10157. [2021-03-10 21:27:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.24379677038204) internal successors, (32944), 10156 states have internal predecessors, (32944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:49,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32944 transitions. [2021-03-10 21:27:49,303 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32944 transitions. Word has length 21 [2021-03-10 21:27:49,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:49,303 INFO L480 AbstractCegarLoop]: Abstraction has 10157 states and 32944 transitions. [2021-03-10 21:27:49,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-03-10 21:27:49,303 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32944 transitions. [2021-03-10 21:27:49,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:49,308 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:49,308 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:49,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3395,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:49,508 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:49,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash 140014123, now seen corresponding path program 198 times [2021-03-10 21:27:49,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:49,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221503059] [2021-03-10 21:27:49,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:49,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:49,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221503059] [2021-03-10 21:27:49,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667760298] [2021-03-10 21:27:49,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:49,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:27:49,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:49,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:49,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:49,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:49,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:27:49,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720366649] [2021-03-10 21:27:49,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:49,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:49,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:49,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:49,647 INFO L87 Difference]: Start difference. First operand 10157 states and 32944 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:49,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:49,882 INFO L93 Difference]: Finished difference Result 10675 states and 34250 transitions. [2021-03-10 21:27:49,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:27:49,883 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-03-10 21:27:49,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:49,896 INFO L225 Difference]: With dead ends: 10675 [2021-03-10 21:27:49,896 INFO L226 Difference]: Without dead ends: 10668 [2021-03-10 21:27:49,896 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:27:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10668 states. [2021-03-10 21:27:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10668 to 10194. [2021-03-10 21:27:50,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10194 states, 10193 states have (on average 3.2428136956735014) internal successors, (33054), 10193 states have internal predecessors, (33054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:50,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10194 states to 10194 states and 33054 transitions. [2021-03-10 21:27:50,029 INFO L78 Accepts]: Start accepts. Automaton has 10194 states and 33054 transitions. Word has length 21 [2021-03-10 21:27:50,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:50,030 INFO L480 AbstractCegarLoop]: Abstraction has 10194 states and 33054 transitions. [2021-03-10 21:27:50,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:50,030 INFO L276 IsEmpty]: Start isEmpty. Operand 10194 states and 33054 transitions. [2021-03-10 21:27:50,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:50,035 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:50,035 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:50,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3396 [2021-03-10 21:27:50,236 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:50,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:50,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1565617715, now seen corresponding path program 199 times [2021-03-10 21:27:50,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:50,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674739399] [2021-03-10 21:27:50,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:50,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674739399] [2021-03-10 21:27:50,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714911255] [2021-03-10 21:27:50,307 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:50,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:50,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:50,373 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:50,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:50,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:27:50,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20718421] [2021-03-10 21:27:50,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:50,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:50,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:50,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:50,374 INFO L87 Difference]: Start difference. First operand 10194 states and 33054 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:50,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:50,550 INFO L93 Difference]: Finished difference Result 10950 states and 35064 transitions. [2021-03-10 21:27:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:27:50,551 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-03-10 21:27:50,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:50,565 INFO L225 Difference]: With dead ends: 10950 [2021-03-10 21:27:50,565 INFO L226 Difference]: Without dead ends: 10944 [2021-03-10 21:27:50,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:27:50,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10944 states. [2021-03-10 21:27:50,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10944 to 10207. [2021-03-10 21:27:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242994317068391) internal successors, (33098), 10206 states have internal predecessors, (33098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33098 transitions. [2021-03-10 21:27:50,700 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33098 transitions. Word has length 21 [2021-03-10 21:27:50,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:50,700 INFO L480 AbstractCegarLoop]: Abstraction has 10207 states and 33098 transitions. [2021-03-10 21:27:50,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:50,700 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33098 transitions. [2021-03-10 21:27:50,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:50,707 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:50,707 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:50,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3397 [2021-03-10 21:27:50,908 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:50,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1884378129, now seen corresponding path program 200 times [2021-03-10 21:27:50,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:50,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274703791] [2021-03-10 21:27:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:50,983 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:50,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274703791] [2021-03-10 21:27:50,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868675797] [2021-03-10 21:27:50,983 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:51,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:51,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:51,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:51,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:51,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:51,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:27:51,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661912875] [2021-03-10 21:27:51,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:51,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:51,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:51,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:51,047 INFO L87 Difference]: Start difference. First operand 10207 states and 33098 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:51,209 INFO L93 Difference]: Finished difference Result 10448 states and 33689 transitions. [2021-03-10 21:27:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:27:51,210 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-03-10 21:27:51,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:51,222 INFO L225 Difference]: With dead ends: 10448 [2021-03-10 21:27:51,222 INFO L226 Difference]: Without dead ends: 10442 [2021-03-10 21:27:51,222 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:27:51,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10442 states. [2021-03-10 21:27:51,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10442 to 10207. [2021-03-10 21:27:51,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242896335488928) internal successors, (33097), 10206 states have internal predecessors, (33097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33097 transitions. [2021-03-10 21:27:51,339 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33097 transitions. Word has length 21 [2021-03-10 21:27:51,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:51,339 INFO L480 AbstractCegarLoop]: Abstraction has 10207 states and 33097 transitions. [2021-03-10 21:27:51,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:51,339 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33097 transitions. [2021-03-10 21:27:51,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:51,344 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:51,344 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:51,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3398,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:51,544 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:51,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:51,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1460066893, now seen corresponding path program 201 times [2021-03-10 21:27:51,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:51,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117732933] [2021-03-10 21:27:51,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:51,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117732933] [2021-03-10 21:27:51,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748040966] [2021-03-10 21:27:51,623 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:51,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:27:51,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:51,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:51,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:51,690 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:51,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:51,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:27:51,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765259132] [2021-03-10 21:27:51,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:51,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:51,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:51,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:51,691 INFO L87 Difference]: Start difference. First operand 10207 states and 33097 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-03-10 21:27:51,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:51,870 INFO L93 Difference]: Finished difference Result 10417 states and 33634 transitions. [2021-03-10 21:27:51,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:27:51,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 21 [2021-03-10 21:27:51,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:51,883 INFO L225 Difference]: With dead ends: 10417 [2021-03-10 21:27:51,883 INFO L226 Difference]: Without dead ends: 10410 [2021-03-10 21:27:51,883 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:27:51,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10410 states. [2021-03-10 21:27:51,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10410 to 10207. [2021-03-10 21:27:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242798353909465) internal successors, (33096), 10206 states have internal predecessors, (33096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:52,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33096 transitions. [2021-03-10 21:27:52,003 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33096 transitions. Word has length 21 [2021-03-10 21:27:52,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:52,003 INFO L480 AbstractCegarLoop]: Abstraction has 10207 states and 33096 transitions. [2021-03-10 21:27:52,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-03-10 21:27:52,003 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33096 transitions. [2021-03-10 21:27:52,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:52,010 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:52,010 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:52,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3399,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:52,210 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:52,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:52,210 INFO L82 PathProgramCache]: Analyzing trace with hash 746808533, now seen corresponding path program 202 times [2021-03-10 21:27:52,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:52,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964620282] [2021-03-10 21:27:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:52,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:52,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964620282] [2021-03-10 21:27:52,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456906928] [2021-03-10 21:27:52,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:52,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:52,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:52,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:52,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:52,383 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:52,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:52,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:27:52,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252279995] [2021-03-10 21:27:52,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:27:52,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:52,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:27:52,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:27:52,384 INFO L87 Difference]: Start difference. First operand 10207 states and 33096 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:52,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:52,483 INFO L93 Difference]: Finished difference Result 10562 states and 33685 transitions. [2021-03-10 21:27:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:27:52,483 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:27:52,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:52,496 INFO L225 Difference]: With dead ends: 10562 [2021-03-10 21:27:52,497 INFO L226 Difference]: Without dead ends: 10562 [2021-03-10 21:27:52,497 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:52,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10562 states. [2021-03-10 21:27:52,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10562 to 10217. [2021-03-10 21:27:52,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10217 states, 10216 states have (on average 3.2434416601409555) internal successors, (33135), 10216 states have internal predecessors, (33135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:52,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10217 states to 10217 states and 33135 transitions. [2021-03-10 21:27:52,654 INFO L78 Accepts]: Start accepts. Automaton has 10217 states and 33135 transitions. Word has length 21 [2021-03-10 21:27:52,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:52,654 INFO L480 AbstractCegarLoop]: Abstraction has 10217 states and 33135 transitions. [2021-03-10 21:27:52,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:52,654 INFO L276 IsEmpty]: Start isEmpty. Operand 10217 states and 33135 transitions. [2021-03-10 21:27:52,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:52,659 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:52,659 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:52,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3400,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:52,860 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:52,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:52,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1808066453, now seen corresponding path program 203 times [2021-03-10 21:27:52,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:52,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416205762] [2021-03-10 21:27:52,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:52,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:52,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416205762] [2021-03-10 21:27:52,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630161693] [2021-03-10 21:27:52,921 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:52,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:27:52,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:52,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:52,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:53,002 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:53,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:53,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-03-10 21:27:53,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015454150] [2021-03-10 21:27:53,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:53,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:53,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:53,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:53,003 INFO L87 Difference]: Start difference. First operand 10217 states and 33135 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:27:53,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:53,106 INFO L93 Difference]: Finished difference Result 10501 states and 33539 transitions. [2021-03-10 21:27:53,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:27:53,106 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21 [2021-03-10 21:27:53,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:53,120 INFO L225 Difference]: With dead ends: 10501 [2021-03-10 21:27:53,120 INFO L226 Difference]: Without dead ends: 10501 [2021-03-10 21:27:53,121 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:53,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10501 states. [2021-03-10 21:27:53,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10501 to 10216. [2021-03-10 21:27:53,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.243171806167401) internal successors, (33129), 10215 states have internal predecessors, (33129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33129 transitions. [2021-03-10 21:27:53,272 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33129 transitions. Word has length 21 [2021-03-10 21:27:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:53,272 INFO L480 AbstractCegarLoop]: Abstraction has 10216 states and 33129 transitions. [2021-03-10 21:27:53,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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) [2021-03-10 21:27:53,272 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33129 transitions. [2021-03-10 21:27:53,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:53,277 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:53,277 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:53,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3401,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:53,478 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:53,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:53,478 INFO L82 PathProgramCache]: Analyzing trace with hash -97453145, now seen corresponding path program 204 times [2021-03-10 21:27:53,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:53,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738502821] [2021-03-10 21:27:53,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:53,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738502821] [2021-03-10 21:27:53,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926324998] [2021-03-10 21:27:53,539 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:53,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:27:53,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:53,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:53,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:53,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:53,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:27:53,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614470447] [2021-03-10 21:27:53,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:27:53,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:53,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:27:53,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:27:53,595 INFO L87 Difference]: Start difference. First operand 10216 states and 33129 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-03-10 21:27:53,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:53,775 INFO L93 Difference]: Finished difference Result 10497 states and 33526 transitions. [2021-03-10 21:27:53,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:27:53,775 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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 21 [2021-03-10 21:27:53,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:53,788 INFO L225 Difference]: With dead ends: 10497 [2021-03-10 21:27:53,788 INFO L226 Difference]: Without dead ends: 10495 [2021-03-10 21:27:53,788 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:53,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2021-03-10 21:27:53,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 10216. [2021-03-10 21:27:53,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.242094958394518) internal successors, (33118), 10215 states have internal predecessors, (33118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33118 transitions. [2021-03-10 21:27:53,916 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33118 transitions. Word has length 21 [2021-03-10 21:27:53,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:53,916 INFO L480 AbstractCegarLoop]: Abstraction has 10216 states and 33118 transitions. [2021-03-10 21:27:53,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 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) [2021-03-10 21:27:53,917 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33118 transitions. [2021-03-10 21:27:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:53,922 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:53,922 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:54,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3402,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:54,122 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:54,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:54,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1391951851, now seen corresponding path program 205 times [2021-03-10 21:27:54,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:54,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261084163] [2021-03-10 21:27:54,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:54,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:54,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261084163] [2021-03-10 21:27:54,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338981656] [2021-03-10 21:27:54,183 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:54,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:54,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:54,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:54,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:27:54,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950320935] [2021-03-10 21:27:54,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:54,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:54,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:54,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:54,244 INFO L87 Difference]: Start difference. First operand 10216 states and 33118 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) [2021-03-10 21:27:54,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:54,435 INFO L93 Difference]: Finished difference Result 10502 states and 33522 transitions. [2021-03-10 21:27:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:27:54,435 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 21 [2021-03-10 21:27:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:54,447 INFO L225 Difference]: With dead ends: 10502 [2021-03-10 21:27:54,448 INFO L226 Difference]: Without dead ends: 10499 [2021-03-10 21:27:54,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:27:54,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10499 states. [2021-03-10 21:27:54,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10499 to 10216. [2021-03-10 21:27:54,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.2418991678903573) internal successors, (33116), 10215 states have internal predecessors, (33116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:54,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33116 transitions. [2021-03-10 21:27:54,576 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33116 transitions. Word has length 21 [2021-03-10 21:27:54,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:54,576 INFO L480 AbstractCegarLoop]: Abstraction has 10216 states and 33116 transitions. [2021-03-10 21:27:54,576 INFO L481 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) [2021-03-10 21:27:54,576 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33116 transitions. [2021-03-10 21:27:54,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:54,581 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:54,581 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:54,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3403 [2021-03-10 21:27:54,781 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:54,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:54,782 INFO L82 PathProgramCache]: Analyzing trace with hash 318866471, now seen corresponding path program 206 times [2021-03-10 21:27:54,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:54,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434571541] [2021-03-10 21:27:54,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:54,845 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:54,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434571541] [2021-03-10 21:27:54,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133449183] [2021-03-10 21:27:54,845 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:54,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:54,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:54,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:54,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:54,906 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:54,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:54,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:27:54,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552015183] [2021-03-10 21:27:54,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:54,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:54,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:54,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:54,907 INFO L87 Difference]: Start difference. First operand 10216 states and 33116 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) [2021-03-10 21:27:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:55,071 INFO L93 Difference]: Finished difference Result 11892 states and 38186 transitions. [2021-03-10 21:27:55,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:27:55,071 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 21 [2021-03-10 21:27:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:55,086 INFO L225 Difference]: With dead ends: 11892 [2021-03-10 21:27:55,086 INFO L226 Difference]: Without dead ends: 11888 [2021-03-10 21:27:55,086 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:27:55,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11888 states. [2021-03-10 21:27:55,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11888 to 10216. [2021-03-10 21:27:55,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.2417033773861967) internal successors, (33114), 10215 states have internal predecessors, (33114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:55,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33114 transitions. [2021-03-10 21:27:55,218 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33114 transitions. Word has length 21 [2021-03-10 21:27:55,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:55,218 INFO L480 AbstractCegarLoop]: Abstraction has 10216 states and 33114 transitions. [2021-03-10 21:27:55,218 INFO L481 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) [2021-03-10 21:27:55,218 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33114 transitions. [2021-03-10 21:27:55,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:55,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:55,223 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:55,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3404,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:55,424 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:55,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:55,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1412958059, now seen corresponding path program 207 times [2021-03-10 21:27:55,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:55,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339948686] [2021-03-10 21:27:55,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:55,488 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:55,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339948686] [2021-03-10 21:27:55,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462842708] [2021-03-10 21:27:55,489 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:55,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:27:55,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:55,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:55,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:55,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:55,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:27:55,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749062160] [2021-03-10 21:27:55,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:55,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:55,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:55,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:55,551 INFO L87 Difference]: Start difference. First operand 10216 states and 33114 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:55,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:55,719 INFO L93 Difference]: Finished difference Result 11434 states and 36626 transitions. [2021-03-10 21:27:55,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:27:55,719 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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 21 [2021-03-10 21:27:55,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:55,775 INFO L225 Difference]: With dead ends: 11434 [2021-03-10 21:27:55,775 INFO L226 Difference]: Without dead ends: 11429 [2021-03-10 21:27:55,775 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=173, Invalid=379, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:27:55,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11429 states. [2021-03-10 21:27:55,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11429 to 10216. [2021-03-10 21:27:55,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.241507586882036) internal successors, (33112), 10215 states have internal predecessors, (33112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:55,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33112 transitions. [2021-03-10 21:27:55,890 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33112 transitions. Word has length 21 [2021-03-10 21:27:55,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:55,890 INFO L480 AbstractCegarLoop]: Abstraction has 10216 states and 33112 transitions. [2021-03-10 21:27:55,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 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) [2021-03-10 21:27:55,890 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33112 transitions. [2021-03-10 21:27:55,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:55,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:55,896 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:56,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3405 [2021-03-10 21:27:56,097 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:56,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:56,098 INFO L82 PathProgramCache]: Analyzing trace with hash 970058919, now seen corresponding path program 208 times [2021-03-10 21:27:56,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:56,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617970971] [2021-03-10 21:27:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:56,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617970971] [2021-03-10 21:27:56,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408252802] [2021-03-10 21:27:56,171 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:56,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:56,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:56,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:56,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:56,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:56,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:27:56,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641715453] [2021-03-10 21:27:56,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:56,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:56,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:56,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:56,232 INFO L87 Difference]: Start difference. First operand 10216 states and 33112 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:56,420 INFO L93 Difference]: Finished difference Result 11458 states and 36660 transitions. [2021-03-10 21:27:56,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:27:56,421 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-03-10 21:27:56,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:56,435 INFO L225 Difference]: With dead ends: 11458 [2021-03-10 21:27:56,435 INFO L226 Difference]: Without dead ends: 11452 [2021-03-10 21:27:56,435 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:27:56,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11452 states. [2021-03-10 21:27:56,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11452 to 10313. [2021-03-10 21:27:56,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.2438906128782) internal successors, (33451), 10312 states have internal predecessors, (33451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33451 transitions. [2021-03-10 21:27:56,566 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33451 transitions. Word has length 21 [2021-03-10 21:27:56,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:56,566 INFO L480 AbstractCegarLoop]: Abstraction has 10313 states and 33451 transitions. [2021-03-10 21:27:56,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:56,566 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33451 transitions. [2021-03-10 21:27:56,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:56,571 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:56,571 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:56,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3406 [2021-03-10 21:27:56,772 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:56,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:56,772 INFO L82 PathProgramCache]: Analyzing trace with hash 125087467, now seen corresponding path program 209 times [2021-03-10 21:27:56,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:56,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858446427] [2021-03-10 21:27:56,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:56,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858446427] [2021-03-10 21:27:56,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270801236] [2021-03-10 21:27:56,848 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:56,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:27:56,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:56,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:56,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:56,910 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:56,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:56,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:27:56,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701106018] [2021-03-10 21:27:56,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:56,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:56,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:56,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:56,911 INFO L87 Difference]: Start difference. First operand 10313 states and 33451 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:57,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:57,082 INFO L93 Difference]: Finished difference Result 10600 states and 34163 transitions. [2021-03-10 21:27:57,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:27:57,083 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-03-10 21:27:57,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:57,096 INFO L225 Difference]: With dead ends: 10600 [2021-03-10 21:27:57,096 INFO L226 Difference]: Without dead ends: 10594 [2021-03-10 21:27:57,096 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 144.4ms TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:27:57,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10594 states. [2021-03-10 21:27:57,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10594 to 10313. [2021-03-10 21:27:57,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.2437936384794415) internal successors, (33450), 10312 states have internal predecessors, (33450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33450 transitions. [2021-03-10 21:27:57,219 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33450 transitions. Word has length 21 [2021-03-10 21:27:57,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:57,219 INFO L480 AbstractCegarLoop]: Abstraction has 10313 states and 33450 transitions. [2021-03-10 21:27:57,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:57,219 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33450 transitions. [2021-03-10 21:27:57,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:57,225 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:57,225 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:57,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3407,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:57,425 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:57,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:57,425 INFO L82 PathProgramCache]: Analyzing trace with hash -299223769, now seen corresponding path program 210 times [2021-03-10 21:27:57,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:57,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283183357] [2021-03-10 21:27:57,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:57,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:57,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283183357] [2021-03-10 21:27:57,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124304191] [2021-03-10 21:27:57,506 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:57,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:27:57,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:57,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:57,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:57,569 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:57,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:57,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:27:57,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224716619] [2021-03-10 21:27:57,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:57,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:57,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:57,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:57,570 INFO L87 Difference]: Start difference. First operand 10313 states and 33450 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-03-10 21:27:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:57,725 INFO L93 Difference]: Finished difference Result 10577 states and 34108 transitions. [2021-03-10 21:27:57,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:27:57,725 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 21 [2021-03-10 21:27:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:57,738 INFO L225 Difference]: With dead ends: 10577 [2021-03-10 21:27:57,738 INFO L226 Difference]: Without dead ends: 10570 [2021-03-10 21:27:57,738 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:27:57,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10570 states. [2021-03-10 21:27:57,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10570 to 10313. [2021-03-10 21:27:57,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.243696664080683) internal successors, (33449), 10312 states have internal predecessors, (33449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33449 transitions. [2021-03-10 21:27:57,865 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33449 transitions. Word has length 21 [2021-03-10 21:27:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:57,865 INFO L480 AbstractCegarLoop]: Abstraction has 10313 states and 33449 transitions. [2021-03-10 21:27:57,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-03-10 21:27:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33449 transitions. [2021-03-10 21:27:57,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:57,871 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:57,871 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:58,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3408 [2021-03-10 21:27:58,071 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:58,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:58,072 INFO L82 PathProgramCache]: Analyzing trace with hash -567970197, now seen corresponding path program 211 times [2021-03-10 21:27:58,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:58,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677821794] [2021-03-10 21:27:58,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:58,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677821794] [2021-03-10 21:27:58,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643460139] [2021-03-10 21:27:58,158 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:58,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:27:58,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:58,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:58,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:27:58,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6863152] [2021-03-10 21:27:58,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:58,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:58,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:58,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:58,220 INFO L87 Difference]: Start difference. First operand 10313 states and 33449 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:58,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:58,376 INFO L93 Difference]: Finished difference Result 10543 states and 34047 transitions. [2021-03-10 21:27:58,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:27:58,377 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 21 [2021-03-10 21:27:58,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:58,389 INFO L225 Difference]: With dead ends: 10543 [2021-03-10 21:27:58,389 INFO L226 Difference]: Without dead ends: 10535 [2021-03-10 21:27:58,390 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:27:58,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10535 states. [2021-03-10 21:27:58,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10535 to 10313. [2021-03-10 21:27:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.243599689681924) internal successors, (33448), 10312 states have internal predecessors, (33448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:58,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33448 transitions. [2021-03-10 21:27:58,514 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33448 transitions. Word has length 21 [2021-03-10 21:27:58,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:58,514 INFO L480 AbstractCegarLoop]: Abstraction has 10313 states and 33448 transitions. [2021-03-10 21:27:58,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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) [2021-03-10 21:27:58,514 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33448 transitions. [2021-03-10 21:27:58,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:58,519 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:58,519 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:58,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3409,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:58,720 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:58,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:58,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1673725717, now seen corresponding path program 212 times [2021-03-10 21:27:58,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:58,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357001002] [2021-03-10 21:27:58,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:58,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357001002] [2021-03-10 21:27:58,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039104596] [2021-03-10 21:27:58,791 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:58,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:58,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:58,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:58,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:58,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:58,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:27:58,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013290976] [2021-03-10 21:27:58,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:27:58,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:58,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:27:58,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:27:58,853 INFO L87 Difference]: Start difference. First operand 10313 states and 33448 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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) [2021-03-10 21:27:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:59,003 INFO L93 Difference]: Finished difference Result 10708 states and 34397 transitions. [2021-03-10 21:27:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:27:59,004 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21 [2021-03-10 21:27:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:59,017 INFO L225 Difference]: With dead ends: 10708 [2021-03-10 21:27:59,017 INFO L226 Difference]: Without dead ends: 10708 [2021-03-10 21:27:59,017 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:27:59,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10708 states. [2021-03-10 21:27:59,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10708 to 10467. [2021-03-10 21:27:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10467 states, 10466 states have (on average 3.2501433212306514) internal successors, (34016), 10466 states have internal predecessors, (34016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 34016 transitions. [2021-03-10 21:27:59,186 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 34016 transitions. Word has length 21 [2021-03-10 21:27:59,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:59,187 INFO L480 AbstractCegarLoop]: Abstraction has 10467 states and 34016 transitions. [2021-03-10 21:27:59,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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) [2021-03-10 21:27:59,187 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 34016 transitions. [2021-03-10 21:27:59,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:59,192 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:59,192 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:59,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3410,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:59,393 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:59,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:59,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1547961357, now seen corresponding path program 213 times [2021-03-10 21:27:59,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:59,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292592594] [2021-03-10 21:27:59,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:59,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292592594] [2021-03-10 21:27:59,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538623572] [2021-03-10 21:27:59,461 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:59,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:27:59,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:59,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:27:59,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:59,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:59,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:27:59,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210888016] [2021-03-10 21:27:59,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:27:59,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:59,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:27:59,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:27:59,527 INFO L87 Difference]: Start difference. First operand 10467 states and 34016 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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) [2021-03-10 21:27:59,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:59,715 INFO L93 Difference]: Finished difference Result 10785 states and 34763 transitions. [2021-03-10 21:27:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:27:59,716 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21 [2021-03-10 21:27:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:59,729 INFO L225 Difference]: With dead ends: 10785 [2021-03-10 21:27:59,729 INFO L226 Difference]: Without dead ends: 10778 [2021-03-10 21:27:59,730 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 141.8ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:27:59,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10778 states. [2021-03-10 21:27:59,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10778 to 10467. [2021-03-10 21:27:59,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10467 states, 10466 states have (on average 3.2500477737435505) internal successors, (34015), 10466 states have internal predecessors, (34015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:59,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 34015 transitions. [2021-03-10 21:27:59,857 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 34015 transitions. Word has length 21 [2021-03-10 21:27:59,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:59,857 INFO L480 AbstractCegarLoop]: Abstraction has 10467 states and 34015 transitions. [2021-03-10 21:27:59,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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) [2021-03-10 21:27:59,857 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 34015 transitions. [2021-03-10 21:27:59,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:27:59,862 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:59,862 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:00,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3411,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:00,063 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:00,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:00,063 INFO L82 PathProgramCache]: Analyzing trace with hash 196402649, now seen corresponding path program 214 times [2021-03-10 21:28:00,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:00,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161933073] [2021-03-10 21:28:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:00,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161933073] [2021-03-10 21:28:00,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541480293] [2021-03-10 21:28:00,132 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:00,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:00,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:00,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:28:00,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:00,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:00,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:28:00,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79635142] [2021-03-10 21:28:00,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:28:00,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:00,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:28:00,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:00,193 INFO L87 Difference]: Start difference. First operand 10467 states and 34015 transitions. Second operand has 16 states, 16 states have (on average 1.6875) 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) [2021-03-10 21:28:00,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:00,381 INFO L93 Difference]: Finished difference Result 11060 states and 35467 transitions. [2021-03-10 21:28:00,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:28:00,382 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) 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) Word has length 21 [2021-03-10 21:28:00,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:00,395 INFO L225 Difference]: With dead ends: 11060 [2021-03-10 21:28:00,395 INFO L226 Difference]: Without dead ends: 11053 [2021-03-10 21:28:00,395 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:28:00,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11053 states. [2021-03-10 21:28:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11053 to 10479. [2021-03-10 21:28:00,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10479 states, 10478 states have (on average 3.2499522809696506) internal successors, (34053), 10478 states have internal predecessors, (34053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:00,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10479 states to 10479 states and 34053 transitions. [2021-03-10 21:28:00,526 INFO L78 Accepts]: Start accepts. Automaton has 10479 states and 34053 transitions. Word has length 21 [2021-03-10 21:28:00,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:00,526 INFO L480 AbstractCegarLoop]: Abstraction has 10479 states and 34053 transitions. [2021-03-10 21:28:00,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) 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) [2021-03-10 21:28:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 10479 states and 34053 transitions. [2021-03-10 21:28:00,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:28:00,532 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:00,532 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:00,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3412,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:00,733 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash -227908587, now seen corresponding path program 215 times [2021-03-10 21:28:00,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:00,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096765651] [2021-03-10 21:28:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:00,806 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:00,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096765651] [2021-03-10 21:28:00,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335316682] [2021-03-10 21:28:00,806 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:00,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:28:00,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:00,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:28:00,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:00,870 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:00,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:00,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:28:00,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413989059] [2021-03-10 21:28:00,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:28:00,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:00,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:28:00,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:00,870 INFO L87 Difference]: Start difference. First operand 10479 states and 34053 transitions. Second operand has 16 states, 16 states have (on average 1.6875) 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) [2021-03-10 21:28:01,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:01,044 INFO L93 Difference]: Finished difference Result 10685 states and 34579 transitions. [2021-03-10 21:28:01,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:28:01,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) 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) Word has length 21 [2021-03-10 21:28:01,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:01,059 INFO L225 Difference]: With dead ends: 10685 [2021-03-10 21:28:01,059 INFO L226 Difference]: Without dead ends: 10678 [2021-03-10 21:28:01,060 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:28:01,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10678 states. [2021-03-10 21:28:01,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10678 to 10479. [2021-03-10 21:28:01,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10479 states, 10478 states have (on average 3.2498568429089523) internal successors, (34052), 10478 states have internal predecessors, (34052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10479 states to 10479 states and 34052 transitions. [2021-03-10 21:28:01,201 INFO L78 Accepts]: Start accepts. Automaton has 10479 states and 34052 transitions. Word has length 21 [2021-03-10 21:28:01,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:01,201 INFO L480 AbstractCegarLoop]: Abstraction has 10479 states and 34052 transitions. [2021-03-10 21:28:01,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) 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) [2021-03-10 21:28:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 10479 states and 34052 transitions. [2021-03-10 21:28:01,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:28:01,207 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:01,207 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:01,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3413 [2021-03-10 21:28:01,408 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:01,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:01,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1562888013, now seen corresponding path program 216 times [2021-03-10 21:28:01,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:01,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912384587] [2021-03-10 21:28:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:01,479 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:01,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912384587] [2021-03-10 21:28:01,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679331444] [2021-03-10 21:28:01,479 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:01,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:28:01,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:01,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:28:01,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:01,544 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:01,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:01,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:28:01,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565177589] [2021-03-10 21:28:01,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:28:01,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:01,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:28:01,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:01,545 INFO L87 Difference]: Start difference. First operand 10479 states and 34052 transitions. Second operand has 16 states, 16 states have (on average 1.6875) 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) [2021-03-10 21:28:01,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:01,737 INFO L93 Difference]: Finished difference Result 11317 states and 36210 transitions. [2021-03-10 21:28:01,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:28:01,737 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) 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) Word has length 21 [2021-03-10 21:28:01,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:01,752 INFO L225 Difference]: With dead ends: 11317 [2021-03-10 21:28:01,753 INFO L226 Difference]: Without dead ends: 11310 [2021-03-10 21:28:01,753 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:28:01,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11310 states. [2021-03-10 21:28:01,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11310 to 10494. [2021-03-10 21:28:01,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.2499761745925855) internal successors, (34102), 10493 states have internal predecessors, (34102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:01,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34102 transitions. [2021-03-10 21:28:01,902 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34102 transitions. Word has length 21 [2021-03-10 21:28:01,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:01,902 INFO L480 AbstractCegarLoop]: Abstraction has 10494 states and 34102 transitions. [2021-03-10 21:28:01,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) 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) [2021-03-10 21:28:01,902 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34102 transitions. [2021-03-10 21:28:01,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:28:01,908 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:01,908 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:02,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3414,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:02,123 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:02,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:02,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1987199249, now seen corresponding path program 217 times [2021-03-10 21:28:02,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:02,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865038720] [2021-03-10 21:28:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:02,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:02,197 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:02,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865038720] [2021-03-10 21:28:02,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364365783] [2021-03-10 21:28:02,197 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:02,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:28:02,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:02,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:02,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:28:02,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98083274] [2021-03-10 21:28:02,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:28:02,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:02,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:28:02,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:02,259 INFO L87 Difference]: Start difference. First operand 10494 states and 34102 transitions. Second operand has 16 states, 16 states have (on average 1.6875) 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) [2021-03-10 21:28:02,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:02,433 INFO L93 Difference]: Finished difference Result 10745 states and 34721 transitions. [2021-03-10 21:28:02,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:28:02,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) 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) Word has length 21 [2021-03-10 21:28:02,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:02,447 INFO L225 Difference]: With dead ends: 10745 [2021-03-10 21:28:02,447 INFO L226 Difference]: Without dead ends: 10738 [2021-03-10 21:28:02,447 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:28:02,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10738 states. [2021-03-10 21:28:02,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10738 to 10494. [2021-03-10 21:28:02,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.249880872962928) internal successors, (34101), 10493 states have internal predecessors, (34101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:02,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34101 transitions. [2021-03-10 21:28:02,612 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34101 transitions. Word has length 21 [2021-03-10 21:28:02,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:02,612 INFO L480 AbstractCegarLoop]: Abstraction has 10494 states and 34101 transitions. [2021-03-10 21:28:02,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) 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) [2021-03-10 21:28:02,612 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34101 transitions. [2021-03-10 21:28:02,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:28:02,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:02,618 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:02,818 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3415 [2021-03-10 21:28:02,818 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:02,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:02,818 INFO L82 PathProgramCache]: Analyzing trace with hash 2039021619, now seen corresponding path program 218 times [2021-03-10 21:28:02,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:02,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054099548] [2021-03-10 21:28:02,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:02,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054099548] [2021-03-10 21:28:02,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448032078] [2021-03-10 21:28:02,895 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:02,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:02,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:02,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:28:02,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:02,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:02,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:28:02,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143429890] [2021-03-10 21:28:02,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:28:02,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:02,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:28:02,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:02,957 INFO L87 Difference]: Start difference. First operand 10494 states and 34101 transitions. Second operand has 16 states, 16 states have (on average 1.6875) 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) [2021-03-10 21:28:03,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:03,126 INFO L93 Difference]: Finished difference Result 10713 states and 34665 transitions. [2021-03-10 21:28:03,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:28:03,126 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) 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) Word has length 21 [2021-03-10 21:28:03,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:03,139 INFO L225 Difference]: With dead ends: 10713 [2021-03-10 21:28:03,139 INFO L226 Difference]: Without dead ends: 10705 [2021-03-10 21:28:03,139 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:28:03,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10705 states. [2021-03-10 21:28:03,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10705 to 10494. [2021-03-10 21:28:03,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.2497855713332697) internal successors, (34100), 10493 states have internal predecessors, (34100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:03,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34100 transitions. [2021-03-10 21:28:03,265 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34100 transitions. Word has length 21 [2021-03-10 21:28:03,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:03,265 INFO L480 AbstractCegarLoop]: Abstraction has 10494 states and 34100 transitions. [2021-03-10 21:28:03,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) 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) [2021-03-10 21:28:03,265 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34100 transitions. [2021-03-10 21:28:03,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:28:03,271 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:03,271 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:03,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3416,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:03,471 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:03,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:03,471 INFO L82 PathProgramCache]: Analyzing trace with hash 355397379, now seen corresponding path program 219 times [2021-03-10 21:28:03,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:03,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890881170] [2021-03-10 21:28:03,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:03,533 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:03,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890881170] [2021-03-10 21:28:03,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567232688] [2021-03-10 21:28:03,533 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:03,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:28:03,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:03,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:28:03,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:03,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:03,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:28:03,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965268710] [2021-03-10 21:28:03,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:28:03,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:03,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:28:03,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:28:03,595 INFO L87 Difference]: Start difference. First operand 10494 states and 34100 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-03-10 21:28:03,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:03,703 INFO L93 Difference]: Finished difference Result 12763 states and 41190 transitions. [2021-03-10 21:28:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:28:03,704 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-03-10 21:28:03,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:03,720 INFO L225 Difference]: With dead ends: 12763 [2021-03-10 21:28:03,721 INFO L226 Difference]: Without dead ends: 12763 [2021-03-10 21:28:03,721 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:03,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-03-10 21:28:03,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 12391. [2021-03-10 21:28:03,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12391 states, 12390 states have (on average 3.2764326069410816) internal successors, (40595), 12390 states have internal predecessors, (40595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12391 states to 12391 states and 40595 transitions. [2021-03-10 21:28:03,889 INFO L78 Accepts]: Start accepts. Automaton has 12391 states and 40595 transitions. Word has length 21 [2021-03-10 21:28:03,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:03,889 INFO L480 AbstractCegarLoop]: Abstraction has 12391 states and 40595 transitions. [2021-03-10 21:28:03,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-03-10 21:28:03,889 INFO L276 IsEmpty]: Start isEmpty. Operand 12391 states and 40595 transitions. [2021-03-10 21:28:03,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:28:03,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:03,896 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:04,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3417,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:04,096 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:04,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:04,097 INFO L82 PathProgramCache]: Analyzing trace with hash 2095489689, now seen corresponding path program 220 times [2021-03-10 21:28:04,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:04,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514731788] [2021-03-10 21:28:04,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 47 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:04,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514731788] [2021-03-10 21:28:04,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640816544] [2021-03-10 21:28:04,154 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:04,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:04,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:04,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:28:04,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:04,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:04,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-03-10 21:28:04,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800115539] [2021-03-10 21:28:04,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:28:04,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:04,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:28:04,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:04,216 INFO L87 Difference]: Start difference. First operand 12391 states and 40595 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-03-10 21:28:04,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:04,332 INFO L93 Difference]: Finished difference Result 12700 states and 41042 transitions. [2021-03-10 21:28:04,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:28:04,332 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 21 [2021-03-10 21:28:04,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:04,349 INFO L225 Difference]: With dead ends: 12700 [2021-03-10 21:28:04,349 INFO L226 Difference]: Without dead ends: 12700 [2021-03-10 21:28:04,349 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:04,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12700 states. [2021-03-10 21:28:04,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12700 to 12390. [2021-03-10 21:28:04,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12390 states, 12389 states have (on average 3.276293486157075) internal successors, (40590), 12389 states have internal predecessors, (40590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12390 states to 12390 states and 40590 transitions. [2021-03-10 21:28:04,519 INFO L78 Accepts]: Start accepts. Automaton has 12390 states and 40590 transitions. Word has length 21 [2021-03-10 21:28:04,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:04,519 INFO L480 AbstractCegarLoop]: Abstraction has 12390 states and 40590 transitions. [2021-03-10 21:28:04,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2021-03-10 21:28:04,520 INFO L276 IsEmpty]: Start isEmpty. Operand 12390 states and 40590 transitions. [2021-03-10 21:28:04,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:28:04,526 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:04,526 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:04,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3418 [2021-03-10 21:28:04,727 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:04,727 INFO L82 PathProgramCache]: Analyzing trace with hash -488864299, now seen corresponding path program 221 times [2021-03-10 21:28:04,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:04,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933381140] [2021-03-10 21:28:04,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:04,782 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:04,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933381140] [2021-03-10 21:28:04,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358978405] [2021-03-10 21:28:04,782 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:04,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:28:04,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:04,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:28:04,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:04,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:04,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:28:04,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653913618] [2021-03-10 21:28:04,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:28:04,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:04,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:28:04,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:28:04,839 INFO L87 Difference]: Start difference. First operand 12390 states and 40590 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-03-10 21:28:05,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:05,011 INFO L93 Difference]: Finished difference Result 12712 states and 41072 transitions. [2021-03-10 21:28:05,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:28:05,012 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21 [2021-03-10 21:28:05,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:05,027 INFO L225 Difference]: With dead ends: 12712 [2021-03-10 21:28:05,027 INFO L226 Difference]: Without dead ends: 12710 [2021-03-10 21:28:05,027 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:28:05,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12710 states. [2021-03-10 21:28:05,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12710 to 12390. [2021-03-10 21:28:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12390 states, 12389 states have (on average 3.2761320526273305) internal successors, (40588), 12389 states have internal predecessors, (40588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:05,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12390 states to 12390 states and 40588 transitions. [2021-03-10 21:28:05,195 INFO L78 Accepts]: Start accepts. Automaton has 12390 states and 40588 transitions. Word has length 21 [2021-03-10 21:28:05,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:05,195 INFO L480 AbstractCegarLoop]: Abstraction has 12390 states and 40588 transitions. [2021-03-10 21:28:05,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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) [2021-03-10 21:28:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 12390 states and 40588 transitions. [2021-03-10 21:28:05,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:28:05,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:05,202 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:05,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3419,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:05,402 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:05,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:05,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1000540697, now seen corresponding path program 222 times [2021-03-10 21:28:05,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:05,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55093773] [2021-03-10 21:28:05,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:05,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55093773] [2021-03-10 21:28:05,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144086112] [2021-03-10 21:28:05,459 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:05,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:28:05,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:05,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:28:05,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:05,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:05,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:28:05,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421692273] [2021-03-10 21:28:05,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:28:05,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:05,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:28:05,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:05,523 INFO L87 Difference]: Start difference. First operand 12390 states and 40588 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-03-10 21:28:05,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:05,723 INFO L93 Difference]: Finished difference Result 12717 states and 41077 transitions. [2021-03-10 21:28:05,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:28:05,723 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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 21 [2021-03-10 21:28:05,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:05,739 INFO L225 Difference]: With dead ends: 12717 [2021-03-10 21:28:05,740 INFO L226 Difference]: Without dead ends: 12714 [2021-03-10 21:28:05,740 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:28:05,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12714 states. [2021-03-10 21:28:05,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12714 to 12399. [2021-03-10 21:28:05,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.2764962090659786) internal successors, (40622), 12398 states have internal predecessors, (40622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:05,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40622 transitions. [2021-03-10 21:28:05,946 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40622 transitions. Word has length 21 [2021-03-10 21:28:05,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:05,946 INFO L480 AbstractCegarLoop]: Abstraction has 12399 states and 40622 transitions. [2021-03-10 21:28:05,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-03-10 21:28:05,946 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40622 transitions. [2021-03-10 21:28:05,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:28:05,953 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:05,953 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:06,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3420,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:06,153 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:06,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:06,153 INFO L82 PathProgramCache]: Analyzing trace with hash -72544683, now seen corresponding path program 223 times [2021-03-10 21:28:06,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:06,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930743111] [2021-03-10 21:28:06,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:06,209 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:06,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930743111] [2021-03-10 21:28:06,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637637672] [2021-03-10 21:28:06,209 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:06,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:28:06,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:06,270 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:06,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:06,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:28:06,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585283021] [2021-03-10 21:28:06,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:28:06,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:06,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:28:06,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:06,270 INFO L87 Difference]: Start difference. First operand 12399 states and 40622 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-03-10 21:28:06,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:06,460 INFO L93 Difference]: Finished difference Result 14561 states and 47167 transitions. [2021-03-10 21:28:06,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:28:06,460 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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 21 [2021-03-10 21:28:06,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:06,480 INFO L225 Difference]: With dead ends: 14561 [2021-03-10 21:28:06,480 INFO L226 Difference]: Without dead ends: 14557 [2021-03-10 21:28:06,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:28:06,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14557 states. [2021-03-10 21:28:06,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14557 to 12399. [2021-03-10 21:28:06,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.276415550895306) internal successors, (40621), 12398 states have internal predecessors, (40621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40621 transitions. [2021-03-10 21:28:06,663 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40621 transitions. Word has length 21 [2021-03-10 21:28:06,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:06,663 INFO L480 AbstractCegarLoop]: Abstraction has 12399 states and 40621 transitions. [2021-03-10 21:28:06,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-03-10 21:28:06,663 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40621 transitions. [2021-03-10 21:28:06,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:28:06,669 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:06,670 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:06,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3421,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:06,870 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:06,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:06,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1021546905, now seen corresponding path program 224 times [2021-03-10 21:28:06,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:06,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377045977] [2021-03-10 21:28:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:06,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:06,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377045977] [2021-03-10 21:28:06,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524580033] [2021-03-10 21:28:06,930 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:06,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:06,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:06,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:28:06,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:06,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:06,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:28:06,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704702330] [2021-03-10 21:28:06,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:28:06,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:06,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:28:06,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:06,991 INFO L87 Difference]: Start difference. First operand 12399 states and 40621 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-03-10 21:28:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:07,174 INFO L93 Difference]: Finished difference Result 14191 states and 45981 transitions. [2021-03-10 21:28:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:28:07,175 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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 21 [2021-03-10 21:28:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:07,193 INFO L225 Difference]: With dead ends: 14191 [2021-03-10 21:28:07,193 INFO L226 Difference]: Without dead ends: 14186 [2021-03-10 21:28:07,193 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:28:07,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14186 states. [2021-03-10 21:28:07,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14186 to 12399. [2021-03-10 21:28:07,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.276334892724633) internal successors, (40620), 12398 states have internal predecessors, (40620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:07,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40620 transitions. [2021-03-10 21:28:07,386 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40620 transitions. Word has length 21 [2021-03-10 21:28:07,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:07,386 INFO L480 AbstractCegarLoop]: Abstraction has 12399 states and 40620 transitions. [2021-03-10 21:28:07,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 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) [2021-03-10 21:28:07,386 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40620 transitions. [2021-03-10 21:28:07,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:28:07,393 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:07,393 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:07,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3422,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:07,593 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:07,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:07,594 INFO L82 PathProgramCache]: Analyzing trace with hash 578647765, now seen corresponding path program 225 times [2021-03-10 21:28:07,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:07,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214514648] [2021-03-10 21:28:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:07,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214514648] [2021-03-10 21:28:07,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496794786] [2021-03-10 21:28:07,656 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:07,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:28:07,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:07,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:28:07,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:07,719 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:07,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:07,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:28:07,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636449890] [2021-03-10 21:28:07,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:28:07,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:07,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:28:07,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:07,719 INFO L87 Difference]: Start difference. First operand 12399 states and 40620 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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) [2021-03-10 21:28:07,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:07,896 INFO L93 Difference]: Finished difference Result 13610 states and 44018 transitions. [2021-03-10 21:28:07,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:28:07,897 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 21 [2021-03-10 21:28:07,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:07,914 INFO L225 Difference]: With dead ends: 13610 [2021-03-10 21:28:07,914 INFO L226 Difference]: Without dead ends: 13604 [2021-03-10 21:28:07,914 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:28:07,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13604 states. [2021-03-10 21:28:08,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13604 to 12399. [2021-03-10 21:28:08,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.2762542345539605) internal successors, (40619), 12398 states have internal predecessors, (40619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:08,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40619 transitions. [2021-03-10 21:28:08,084 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40619 transitions. Word has length 21 [2021-03-10 21:28:08,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:08,084 INFO L480 AbstractCegarLoop]: Abstraction has 12399 states and 40619 transitions. [2021-03-10 21:28:08,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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) [2021-03-10 21:28:08,085 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40619 transitions. [2021-03-10 21:28:08,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:28:08,091 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:08,091 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:08,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3423,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:08,292 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:08,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:08,292 INFO L82 PathProgramCache]: Analyzing trace with hash -266323687, now seen corresponding path program 226 times [2021-03-10 21:28:08,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:08,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178449431] [2021-03-10 21:28:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:08,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:08,363 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:08,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178449431] [2021-03-10 21:28:08,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137013307] [2021-03-10 21:28:08,363 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:08,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:08,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:08,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:28:08,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:08,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:08,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:28:08,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698406573] [2021-03-10 21:28:08,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:28:08,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:08,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:28:08,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:08,424 INFO L87 Difference]: Start difference. First operand 12399 states and 40619 transitions. Second operand has 16 states, 16 states have (on average 1.6875) 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) [2021-03-10 21:28:08,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:08,616 INFO L93 Difference]: Finished difference Result 13653 states and 44081 transitions. [2021-03-10 21:28:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:28:08,617 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) 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) Word has length 21 [2021-03-10 21:28:08,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:08,634 INFO L225 Difference]: With dead ends: 13653 [2021-03-10 21:28:08,635 INFO L226 Difference]: Without dead ends: 13646 [2021-03-10 21:28:08,635 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:28:08,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13646 states. [2021-03-10 21:28:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13646 to 12454. [2021-03-10 21:28:08,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2765598650927488) internal successors, (40803), 12453 states have internal predecessors, (40803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:08,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40803 transitions. [2021-03-10 21:28:08,869 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40803 transitions. Word has length 21 [2021-03-10 21:28:08,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:08,869 INFO L480 AbstractCegarLoop]: Abstraction has 12454 states and 40803 transitions. [2021-03-10 21:28:08,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) 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) [2021-03-10 21:28:08,869 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40803 transitions. [2021-03-10 21:28:08,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:28:08,876 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:08,876 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:09,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3424,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:09,077 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:09,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:09,077 INFO L82 PathProgramCache]: Analyzing trace with hash -690634923, now seen corresponding path program 227 times [2021-03-10 21:28:09,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:09,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035698884] [2021-03-10 21:28:09,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:09,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035698884] [2021-03-10 21:28:09,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540966702] [2021-03-10 21:28:09,153 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:09,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:28:09,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:09,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:28:09,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:09,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:09,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:28:09,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297072343] [2021-03-10 21:28:09,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:28:09,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:09,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:28:09,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:09,217 INFO L87 Difference]: Start difference. First operand 12454 states and 40803 transitions. Second operand has 16 states, 16 states have (on average 1.6875) 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) [2021-03-10 21:28:09,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:09,390 INFO L93 Difference]: Finished difference Result 12749 states and 41539 transitions. [2021-03-10 21:28:09,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:28:09,391 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) 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) Word has length 21 [2021-03-10 21:28:09,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:09,407 INFO L225 Difference]: With dead ends: 12749 [2021-03-10 21:28:09,407 INFO L226 Difference]: Without dead ends: 12742 [2021-03-10 21:28:09,407 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:28:09,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12742 states. [2021-03-10 21:28:09,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12742 to 12454. [2021-03-10 21:28:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.276479563157472) internal successors, (40802), 12453 states have internal predecessors, (40802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40802 transitions. [2021-03-10 21:28:09,569 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40802 transitions. Word has length 21 [2021-03-10 21:28:09,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:09,569 INFO L480 AbstractCegarLoop]: Abstraction has 12454 states and 40802 transitions. [2021-03-10 21:28:09,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) 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) [2021-03-10 21:28:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40802 transitions. [2021-03-10 21:28:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:28:09,576 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:09,576 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:09,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3425 [2021-03-10 21:28:09,777 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:09,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:09,777 INFO L82 PathProgramCache]: Analyzing trace with hash -959381351, now seen corresponding path program 228 times [2021-03-10 21:28:09,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:09,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524105404] [2021-03-10 21:28:09,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:09,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524105404] [2021-03-10 21:28:09,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220399085] [2021-03-10 21:28:09,857 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:09,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:28:09,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:09,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-03-10 21:28:09,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:09,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:09,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:28:09,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950060139] [2021-03-10 21:28:09,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:28:09,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:09,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:28:09,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:09,931 INFO L87 Difference]: Start difference. First operand 12454 states and 40802 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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) [2021-03-10 21:28:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:10,105 INFO L93 Difference]: Finished difference Result 12726 states and 41484 transitions. [2021-03-10 21:28:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:28:10,106 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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 21 [2021-03-10 21:28:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:10,122 INFO L225 Difference]: With dead ends: 12726 [2021-03-10 21:28:10,122 INFO L226 Difference]: Without dead ends: 12718 [2021-03-10 21:28:10,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:28:10,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12718 states. [2021-03-10 21:28:10,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12718 to 12454. [2021-03-10 21:28:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2763992612221955) internal successors, (40801), 12453 states have internal predecessors, (40801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40801 transitions. [2021-03-10 21:28:10,287 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40801 transitions. Word has length 21 [2021-03-10 21:28:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:10,287 INFO L480 AbstractCegarLoop]: Abstraction has 12454 states and 40801 transitions. [2021-03-10 21:28:10,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 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) [2021-03-10 21:28:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40801 transitions. [2021-03-10 21:28:10,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:28:10,294 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:10,295 INFO L519 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:10,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3426,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:10,495 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:10,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:10,495 INFO L82 PathProgramCache]: Analyzing trace with hash -700586027, now seen corresponding path program 229 times [2021-03-10 21:28:10,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:10,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293175579] [2021-03-10 21:28:10,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:10,580 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:10,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293175579] [2021-03-10 21:28:10,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775134585] [2021-03-10 21:28:10,580 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:10,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:10,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:28:10,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:10,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:10,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:28:10,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721158608] [2021-03-10 21:28:10,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:28:10,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:10,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:28:10,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:10,663 INFO L87 Difference]: Start difference. First operand 12454 states and 40801 transitions. Second operand has 16 states, 16 states have (on average 1.6875) 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) [2021-03-10 21:28:10,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:10,826 INFO L93 Difference]: Finished difference Result 12691 states and 41422 transitions. [2021-03-10 21:28:10,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:28:10,826 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) 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) Word has length 21 [2021-03-10 21:28:10,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:10,841 INFO L225 Difference]: With dead ends: 12691 [2021-03-10 21:28:10,841 INFO L226 Difference]: Without dead ends: 12682 [2021-03-10 21:28:10,841 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:28:10,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12682 states. [2021-03-10 21:28:10,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12682 to 12454. [2021-03-10 21:28:10,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2763189592869186) internal successors, (40800), 12453 states have internal predecessors, (40800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:10,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40800 transitions. [2021-03-10 21:28:10,997 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40800 transitions. Word has length 21 [2021-03-10 21:28:10,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:10,997 INFO L480 AbstractCegarLoop]: Abstraction has 12454 states and 40800 transitions. [2021-03-10 21:28:10,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) 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) [2021-03-10 21:28:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40800 transitions. [2021-03-10 21:28:11,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:28:11,004 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:11,004 INFO L519 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:11,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3427 [2021-03-10 21:28:11,204 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:11,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:11,204 INFO L82 PathProgramCache]: Analyzing trace with hash 655261526, now seen corresponding path program 230 times [2021-03-10 21:28:11,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:11,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470960842] [2021-03-10 21:28:11,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:28:11,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470960842] [2021-03-10 21:28:11,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800043153] [2021-03-10 21:28:11,340 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:11,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:11,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:11,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-10 21:28:11,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:11,507 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:28:11,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:11,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-03-10 21:28:11,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035699552] [2021-03-10 21:28:11,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:28:11,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:11,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:28:11,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:28:11,508 INFO L87 Difference]: Start difference. First operand 12454 states and 40800 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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) [2021-03-10 21:28:11,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:11,703 INFO L93 Difference]: Finished difference Result 16028 states and 51289 transitions. [2021-03-10 21:28:11,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:28:11,704 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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) Word has length 22 [2021-03-10 21:28:11,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:11,727 INFO L225 Difference]: With dead ends: 16028 [2021-03-10 21:28:11,727 INFO L226 Difference]: Without dead ends: 16028 [2021-03-10 21:28:11,727 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:28:11,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16028 states. [2021-03-10 21:28:11,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16028 to 12891. [2021-03-10 21:28:11,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12891 states, 12890 states have (on average 3.2592707525213345) internal successors, (42012), 12890 states have internal predecessors, (42012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12891 states to 12891 states and 42012 transitions. [2021-03-10 21:28:11,925 INFO L78 Accepts]: Start accepts. Automaton has 12891 states and 42012 transitions. Word has length 22 [2021-03-10 21:28:11,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:11,925 INFO L480 AbstractCegarLoop]: Abstraction has 12891 states and 42012 transitions. [2021-03-10 21:28:11,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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) [2021-03-10 21:28:11,925 INFO L276 IsEmpty]: Start isEmpty. Operand 12891 states and 42012 transitions. [2021-03-10 21:28:11,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:28:11,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:11,934 INFO L519 BasicCegarLoop]: trace histogram [11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:12,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3428,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:12,135 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:12,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:12,135 INFO L82 PathProgramCache]: Analyzing trace with hash -548365066, now seen corresponding path program 231 times [2021-03-10 21:28:12,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:12,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676641251] [2021-03-10 21:28:12,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:28:12,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676641251] [2021-03-10 21:28:12,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038737933] [2021-03-10 21:28:12,415 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:12,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:28:12,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:12,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:28:12,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:28:12,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:12,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-03-10 21:28:12,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534801253] [2021-03-10 21:28:12,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 21:28:12,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:12,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 21:28:12,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:28:12,646 INFO L87 Difference]: Start difference. First operand 12891 states and 42012 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:12,878 INFO L93 Difference]: Finished difference Result 17733 states and 56311 transitions. [2021-03-10 21:28:12,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:28:12,879 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:28:12,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:12,901 INFO L225 Difference]: With dead ends: 17733 [2021-03-10 21:28:12,901 INFO L226 Difference]: Without dead ends: 17728 [2021-03-10 21:28:12,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 430.3ms TimeCoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:28:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17728 states. [2021-03-10 21:28:13,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17728 to 13517. [2021-03-10 21:28:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13517 states, 13516 states have (on average 3.222033145901154) internal successors, (43549), 13516 states have internal predecessors, (43549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:13,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13517 states to 13517 states and 43549 transitions. [2021-03-10 21:28:13,108 INFO L78 Accepts]: Start accepts. Automaton has 13517 states and 43549 transitions. Word has length 23 [2021-03-10 21:28:13,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:13,108 INFO L480 AbstractCegarLoop]: Abstraction has 13517 states and 43549 transitions. [2021-03-10 21:28:13,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:13,108 INFO L276 IsEmpty]: Start isEmpty. Operand 13517 states and 43549 transitions. [2021-03-10 21:28:13,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:28:13,118 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:13,118 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:13,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3429 [2021-03-10 21:28:13,319 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:13,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:13,319 INFO L82 PathProgramCache]: Analyzing trace with hash 793916246, now seen corresponding path program 232 times [2021-03-10 21:28:13,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:13,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571794388] [2021-03-10 21:28:13,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:13,418 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:13,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571794388] [2021-03-10 21:28:13,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970627236] [2021-03-10 21:28:13,418 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:13,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:13,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:13,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:28:13,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:14,094 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-03-10 21:28:14,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:14,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-03-10 21:28:16,324 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1638 DAG size of output: 1292 [2021-03-10 21:28:16,905 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 633 DAG size of output: 535 [2021-03-10 21:28:19,063 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 2034 DAG size of output: 1651 [2021-03-10 21:28:19,404 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 3473 DAG size of output: 2737 [2021-03-10 21:28:19,674 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 3473 DAG size of output: 2737 [2021-03-10 21:28:19,980 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 3492 DAG size of output: 2756 [2021-03-10 21:28:20,561 WARN L205 SmtUtils]: Spent 562.00 ms on a formula simplification. DAG size of input: 2758 DAG size of output: 3679 [2021-03-10 21:28:20,795 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 2552 [2021-03-10 21:28:20,903 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1209 DAG size of output: 1223 [2021-03-10 21:28:21,189 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 721 DAG size of output: 1052 [2021-03-10 21:28:24,948 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 946 DAG size of output: 1096 [2021-03-10 21:28:25,064 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1052 DAG size of output: 1043 [2021-03-10 21:28:25,262 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 1725 DAG size of output: 1619 [2021-03-10 21:28:25,544 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 1739 DAG size of output: 1628 [2021-03-10 21:28:27,697 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1276 DAG size of output: 1173 [2021-03-10 21:28:27,818 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1289 DAG size of output: 1181 [2021-03-10 21:28:27,969 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1556 DAG size of output: 1523 [2021-03-10 21:28:28,131 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1773 DAG size of output: 1455 [2021-03-10 21:28:28,463 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 2870 DAG size of output: 1855 [2021-03-10 21:28:30,208 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 625 DAG size of output: 591 [2021-03-10 21:28:30,665 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1222 DAG size of output: 1146 [2021-03-10 21:28:30,822 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1530 DAG size of output: 1512 [2021-03-10 21:28:30,986 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1547 DAG size of output: 1524 [2021-03-10 21:28:31,162 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 1820 DAG size of output: 1458 [2021-03-10 21:28:33,056 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 2388 DAG size of output: 1818 [2021-03-10 21:28:33,822 WARN L205 SmtUtils]: Spent 751.00 ms on a formula simplification. DAG size of input: 4904 DAG size of output: 3134 [2021-03-10 21:28:34,377 WARN L205 SmtUtils]: Spent 532.00 ms on a formula simplification. DAG size of input: 4940 DAG size of output: 3174 [2021-03-10 21:28:34,538 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1538 DAG size of output: 1552 [2021-03-10 21:28:34,793 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 1532 DAG size of output: 2482 [2021-03-10 21:28:35,081 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 1397 DAG size of output: 1834 [2021-03-10 21:28:35,197 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1331 DAG size of output: 1330 [2021-03-10 21:28:35,304 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 782 DAG size of output: 994 [2021-03-10 21:28:37,769 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1662 DAG size of output: 1363 [2021-03-10 21:28:39,027 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 2300 DAG size of output: 1851 [2021-03-10 21:28:39,259 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 2363 DAG size of output: 1905 [2021-03-10 21:28:39,529 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 2726 DAG size of output: 2229 [2021-03-10 21:28:39,817 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 2737 DAG size of output: 2236 [2021-03-10 21:28:40,147 WARN L205 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 3069 DAG size of output: 2582 [2021-03-10 21:28:40,442 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 697 DAG size of output: 900 [2021-03-10 21:28:42,683 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 1614 DAG size of output: 1284 [2021-03-10 21:28:42,861 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 2048 DAG size of output: 1621 [2021-03-10 21:28:43,086 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 2477 DAG size of output: 2092 [2021-03-10 21:28:43,323 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 2493 DAG size of output: 2103 [2021-03-10 21:28:43,905 WARN L205 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 5158 DAG size of output: 4297 [2021-03-10 21:28:44,573 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 5959 DAG size of output: 4172 [2021-03-10 21:28:44,822 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 1525 DAG size of output: 2024 [2021-03-10 21:28:44,942 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1459 DAG size of output: 1458 [2021-03-10 21:28:45,111 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 834 DAG size of output: 1083 [2021-03-10 21:28:45,227 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 827 DAG size of output: 1070 [2021-03-10 21:28:47,798 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 1221 DAG size of output: 1101 [2021-03-10 21:28:49,985 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 1832 DAG size of output: 1638 [2021-03-10 21:28:50,267 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 2296 DAG size of output: 2045 [2021-03-10 21:28:50,565 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 2583 DAG size of output: 2455 [2021-03-10 21:28:50,879 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 2598 DAG size of output: 2465 [2021-03-10 21:28:55,598 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 1787 DAG size of output: 1475 [2021-03-10 21:28:55,772 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 1799 DAG size of output: 1483 [2021-03-10 21:28:56,036 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 2263 DAG size of output: 2046 [2021-03-10 21:28:56,319 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 2664 DAG size of output: 2392 [2021-03-10 21:28:56,657 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 3070 DAG size of output: 2767 [2021-03-10 21:28:57,361 WARN L205 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 5343 DAG size of output: 4709 [2021-03-10 21:28:58,073 WARN L205 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 5998 DAG size of output: 4595 [2021-03-10 21:28:59,112 WARN L205 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 11190 DAG size of output: 5719 [2021-03-10 21:29:00,174 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 11226 DAG size of output: 5758 [2021-03-10 21:29:01,884 WARN L205 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 15533 DAG size of output: 8496 [2021-03-10 21:29:02,221 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 2647 DAG size of output: 2679 [2021-03-10 21:29:02,744 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 2641 DAG size of output: 4138 [2021-03-10 21:29:03,210 WARN L205 SmtUtils]: Spent 446.00 ms on a formula simplification. DAG size of input: 2295 DAG size of output: 2826 [2021-03-10 21:29:03,490 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 2259 DAG size of output: 2258 [2021-03-10 21:29:03,619 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 1366 [2021-03-10 21:29:05,192 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1108 DAG size of output: 896 [2021-03-10 21:29:07,060 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1380 DAG size of output: 1149 [2021-03-10 21:29:07,314 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 2034 DAG size of output: 1747 [2021-03-10 21:29:07,542 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 2094 DAG size of output: 1794 [2021-03-10 21:29:07,801 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 2318 DAG size of output: 2004 [2021-03-10 21:29:08,102 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 2686 DAG size of output: 2289 [2021-03-10 21:29:08,417 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 2701 DAG size of output: 2300 [2021-03-10 21:29:08,535 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 746 DAG size of output: 958 [2021-03-10 21:29:08,688 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 741 DAG size of output: 997 [2021-03-10 21:29:10,953 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1527 DAG size of output: 1171 [2021-03-10 21:29:11,131 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 1987 DAG size of output: 1552 [2021-03-10 21:29:11,353 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 2325 DAG size of output: 1902 [2021-03-10 21:29:11,907 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 4792 DAG size of output: 3943 [2021-03-10 21:29:12,101 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 1175 DAG size of output: 1420 [2021-03-10 21:29:12,329 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 689 DAG size of output: 860 [2021-03-10 21:29:14,192 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 1420 DAG size of output: 1268 [2021-03-10 21:29:14,318 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 642 DAG size of output: 712 [2021-03-10 21:29:15,676 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1258 DAG size of output: 1094 [2021-03-10 21:29:15,912 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 2515 DAG size of output: 2119 [2021-03-10 21:29:16,264 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 2977 DAG size of output: 2622 [2021-03-10 21:29:17,150 WARN L205 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 7318 DAG size of output: 6138 [2021-03-10 21:29:18,145 WARN L205 SmtUtils]: Spent 949.00 ms on a formula simplification. DAG size of input: 8735 DAG size of output: 6006 [2021-03-10 21:29:18,665 WARN L205 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 2538 DAG size of output: 3128 [2021-03-10 21:29:19,194 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 2504 DAG size of output: 3286 [2021-03-10 21:29:19,684 WARN L205 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 2482 DAG size of output: 3435 [2021-03-10 21:29:20,173 WARN L205 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 2478 DAG size of output: 3203 [2021-03-10 21:29:20,424 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 2472 DAG size of output: 2472 [2021-03-10 21:29:20,663 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 1280 DAG size of output: 1603 [2021-03-10 21:29:20,773 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 1277 [2021-03-10 21:29:26,967 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 2046 DAG size of output: 1220 [2021-03-10 21:29:27,213 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 1472 DAG size of output: 1924 [2021-03-10 21:29:27,344 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 1430 [2021-03-10 21:29:32,430 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1881 DAG size of output: 1160 [2021-03-10 21:29:32,643 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 758 DAG size of output: 1041 [2021-03-10 21:29:36,929 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1772 DAG size of output: 1022 [2021-03-10 21:29:37,198 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 2892 DAG size of output: 1736 [2021-03-10 21:29:37,596 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 4666 DAG size of output: 2727 [2021-03-10 21:29:38,224 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 5929 DAG size of output: 4398 [2021-03-10 21:29:39,104 WARN L205 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 7205 DAG size of output: 5889 [2021-03-10 21:29:40,196 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 8212 DAG size of output: 6910 [2021-03-10 21:29:41,317 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 9263 DAG size of output: 6781 [2021-03-10 21:29:42,978 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 16365 DAG size of output: 8416 [2021-03-10 21:29:44,682 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 16417 DAG size of output: 8471 [2021-03-10 21:29:48,044 WARN L205 SmtUtils]: Spent 3.29 s on a formula simplification. DAG size of input: 26090 DAG size of output: 13572 [2021-03-10 21:29:51,419 WARN L205 SmtUtils]: Spent 3.27 s on a formula simplification. DAG size of input: 26090 DAG size of output: 13572 [2021-03-10 21:29:54,953 WARN L205 SmtUtils]: Spent 3.46 s on a formula simplification. DAG size of input: 26099 DAG size of output: 13581 [2021-03-10 21:29:58,125 WARN L205 SmtUtils]: Spent 3.08 s on a formula simplification. DAG size of input: 13583 DAG size of output: 13719 [2021-03-10 21:29:59,415 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 5410 DAG size of output: 6613 [2021-03-10 21:29:59,986 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 4745 DAG size of output: 2684 [2021-03-10 21:30:00,492 WARN L205 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 1914 DAG size of output: 2212 [2021-03-10 21:30:00,651 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1410 DAG size of output: 1302 [2021-03-10 21:30:00,778 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 783 DAG size of output: 1024 [2021-03-10 21:30:01,472 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 780 DAG size of output: 1031 [2021-03-10 21:30:02,547 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1457 DAG size of output: 959 [2021-03-10 21:30:02,664 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 811 [2021-03-10 21:30:05,443 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1103 DAG size of output: 740 [2021-03-10 21:30:05,609 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 1721 DAG size of output: 1119 [2021-03-10 21:30:05,854 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 2952 DAG size of output: 1734 [2021-03-10 21:30:06,035 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 1208 DAG size of output: 1115 [2021-03-10 21:30:06,244 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 917 DAG size of output: 1232 [2021-03-10 21:30:08,767 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1580 DAG size of output: 949 [2021-03-10 21:30:09,593 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 1995 DAG size of output: 1129 [2021-03-10 21:30:10,052 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 4347 DAG size of output: 2528 [2021-03-10 21:30:10,569 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 5124 DAG size of output: 3021 [2021-03-10 21:30:11,217 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 2909 DAG size of output: 3206 [2021-03-10 21:30:11,385 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1719 DAG size of output: 791 [2021-03-10 21:30:11,515 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 793 DAG size of output: 821 [2021-03-10 21:30:14,949 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 1555 DAG size of output: 1172 [2021-03-10 21:30:16,053 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 2000 DAG size of output: 1421 [2021-03-10 21:30:16,293 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 2000 DAG size of output: 1421 [2021-03-10 21:30:16,472 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 1951 DAG size of output: 839 [2021-03-10 21:30:16,625 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 782 [2021-03-10 21:30:17,299 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 649 DAG size of output: 841 [2021-03-10 21:30:19,450 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1103 DAG size of output: 841 [2021-03-10 21:30:19,609 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 1024 [2021-03-10 21:30:19,807 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 1024 [2021-03-10 21:30:20,210 WARN L205 SmtUtils]: Spent 394.00 ms on a formula simplification. DAG size of input: 2986 DAG size of output: 2108 [2021-03-10 21:30:20,987 WARN L205 SmtUtils]: Spent 755.00 ms on a formula simplification. DAG size of input: 7615 DAG size of output: 3627 [2021-03-10 21:30:23,356 WARN L205 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 9581 DAG size of output: 10699 [2021-03-10 21:30:24,533 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 7234 DAG size of output: 4615 [2021-03-10 21:30:25,307 WARN L205 SmtUtils]: Spent 671.00 ms on a formula simplification. DAG size of input: 2653 DAG size of output: 3353 [2021-03-10 21:30:25,712 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 2489 DAG size of output: 2089 [2021-03-10 21:30:25,921 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 779 [2021-03-10 21:30:27,161 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 1735 DAG size of output: 1728 [2021-03-10 21:30:27,413 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 1257 DAG size of output: 1591 [2021-03-10 21:30:27,587 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 1253 DAG size of output: 1253 [2021-03-10 21:30:27,713 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 1234 [2021-03-10 21:30:29,016 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1502 DAG size of output: 981 [2021-03-10 21:30:30,177 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 1944 DAG size of output: 1276 [2021-03-10 21:30:32,001 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 2819 DAG size of output: 1830 [2021-03-10 21:30:32,357 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 3486 DAG size of output: 2105 [2021-03-10 21:30:32,605 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 1262 DAG size of output: 1139 [2021-03-10 21:30:32,732 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 923 DAG size of output: 920 [2021-03-10 21:30:34,621 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 644 DAG size of output: 798 [2021-03-10 21:30:34,796 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 1016 [2021-03-10 21:30:36,953 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1558 DAG size of output: 1002 [2021-03-10 21:30:37,216 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 2268 DAG size of output: 1507 [2021-03-10 21:30:38,791 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 2814 DAG size of output: 1745 [2021-03-10 21:30:39,493 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 5877 DAG size of output: 3455 [2021-03-10 21:30:40,430 WARN L205 SmtUtils]: Spent 908.00 ms on a formula simplification. DAG size of input: 7567 DAG size of output: 4263 [2021-03-10 21:30:41,710 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 5600 DAG size of output: 6515 [2021-03-10 21:30:42,397 WARN L205 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 4846 DAG size of output: 3209 [2021-03-10 21:30:42,675 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 1906 DAG size of output: 1558 [2021-03-10 21:30:42,943 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 1305 DAG size of output: 1757 [2021-03-10 21:30:43,083 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 1296 [2021-03-10 21:30:43,283 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 812 DAG size of output: 812 [2021-03-10 21:30:44,762 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1442 DAG size of output: 914 [2021-03-10 21:30:46,192 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 2102 DAG size of output: 1248 [2021-03-10 21:30:47,127 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 2533 DAG size of output: 1385 [2021-03-10 21:30:47,528 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 3729 DAG size of output: 2097 [2021-03-10 21:30:47,749 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 2348 DAG size of output: 960 [2021-03-10 21:30:47,892 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 962 DAG size of output: 809 [2021-03-10 21:30:50,262 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1347 DAG size of output: 811 [2021-03-10 21:30:51,152 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 1709 DAG size of output: 937 [2021-03-10 21:30:51,315 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1709 DAG size of output: 937 [2021-03-10 21:30:51,829 WARN L205 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 5099 DAG size of output: 2657 [2021-03-10 21:30:53,288 WARN L205 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 11321 DAG size of output: 6137 [2021-03-10 21:30:55,666 WARN L205 SmtUtils]: Spent 2.32 s on a formula simplification. DAG size of input: 17534 DAG size of output: 8794 [2021-03-10 21:30:58,016 WARN L205 SmtUtils]: Spent 2.28 s on a formula simplification. DAG size of input: 17534 DAG size of output: 8794 [2021-03-10 21:31:00,531 WARN L205 SmtUtils]: Spent 2.47 s on a formula simplification. DAG size of input: 17544 DAG size of output: 8800 [2021-03-10 21:31:02,532 WARN L205 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 8802 DAG size of output: 6883 [2021-03-10 21:31:03,441 WARN L205 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 4087 DAG size of output: 4537 [2021-03-10 21:31:03,913 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 3359 DAG size of output: 2401 [2021-03-10 21:31:04,741 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 783 DAG size of output: 1033 [2021-03-10 21:31:07,516 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 1632 DAG size of output: 1052 [2021-03-10 21:31:10,090 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1398 DAG size of output: 729 [2021-03-10 21:31:10,227 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1595 DAG size of output: 900 [2021-03-10 21:31:11,512 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 2284 DAG size of output: 1379 [2021-03-10 21:31:11,754 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 2362 DAG size of output: 1396 [2021-03-10 21:31:12,164 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 3520 DAG size of output: 1977 [2021-03-10 21:31:12,915 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 742 DAG size of output: 1062 [2021-03-10 21:31:16,401 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 1921 DAG size of output: 851 [2021-03-10 21:31:17,202 WARN L205 SmtUtils]: Spent 787.00 ms on a formula simplification. DAG size of input: 6251 DAG size of output: 3213 [2021-03-10 21:31:18,159 WARN L205 SmtUtils]: Spent 924.00 ms on a formula simplification. DAG size of input: 7549 DAG size of output: 3873 [2021-03-10 21:31:19,362 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 10070 DAG size of output: 4216 [2021-03-10 21:31:20,566 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 10070 DAG size of output: 4216 [2021-03-10 21:31:21,782 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 10076 DAG size of output: 4222 [2021-03-10 21:31:22,282 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 4224 DAG size of output: 2082 [2021-03-10 21:31:22,593 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 1920 DAG size of output: 1819 [2021-03-10 21:31:22,830 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 1803 DAG size of output: 1782 [2021-03-10 21:31:23,400 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 1553 DAG size of output: 1546 [2021-03-10 21:31:23,582 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 1489 DAG size of output: 821 [2021-03-10 21:31:25,062 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 768 DAG size of output: 918 [2021-03-10 21:31:25,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:31:25,982 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:25,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:31:25,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-03-10 21:31:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:25,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:25,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-03-10 21:31:25,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087884874] [2021-03-10 21:31:25,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:31:25,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:25,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:31:25,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:25,987 INFO L87 Difference]: Start difference. First operand 13517 states and 43549 transitions. Second operand has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:26,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:26,282 INFO L93 Difference]: Finished difference Result 13801 states and 44168 transitions. [2021-03-10 21:31:26,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:31:26,282 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 [2021-03-10 21:31:26,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:26,300 INFO L225 Difference]: With dead ends: 13801 [2021-03-10 21:31:26,300 INFO L226 Difference]: Without dead ends: 13798 [2021-03-10 21:31:26,300 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:26,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13798 states. [2021-03-10 21:31:26,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13798 to 13640. [2021-03-10 21:31:26,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13640 states, 13639 states have (on average 3.22179045384559) internal successors, (43942), 13639 states have internal predecessors, (43942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:26,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13640 states to 13640 states and 43942 transitions. [2021-03-10 21:31:26,474 INFO L78 Accepts]: Start accepts. Automaton has 13640 states and 43942 transitions. Word has length 24 [2021-03-10 21:31:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:26,474 INFO L480 AbstractCegarLoop]: Abstraction has 13640 states and 43942 transitions. [2021-03-10 21:31:26,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:26,474 INFO L276 IsEmpty]: Start isEmpty. Operand 13640 states and 43942 transitions. [2021-03-10 21:31:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:31:26,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:26,483 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:26,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3430 [2021-03-10 21:31:26,687 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:26,688 INFO L82 PathProgramCache]: Analyzing trace with hash 802713344, now seen corresponding path program 233 times [2021-03-10 21:31:26,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:26,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317009571] [2021-03-10 21:31:26,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:26,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317009571] [2021-03-10 21:31:26,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975246652] [2021-03-10 21:31:26,788 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:26,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:31:26,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:26,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:31:26,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:27,498 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-03-10 21:31:27,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:31:27,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-03-10 21:31:31,214 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 2372 DAG size of output: 1768 [2021-03-10 21:31:31,393 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 2372 DAG size of output: 1768 [2021-03-10 21:31:31,597 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 2394 DAG size of output: 1790 [2021-03-10 21:31:31,745 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 1782 DAG size of output: 1774 [2021-03-10 21:31:31,943 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 1776 DAG size of output: 1879 [2021-03-10 21:31:32,119 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 1773 DAG size of output: 1791 [2021-03-10 21:31:32,267 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1768 DAG size of output: 1768 [2021-03-10 21:31:35,737 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1694 DAG size of output: 1131 [2021-03-10 21:31:35,860 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1737 DAG size of output: 1175 [2021-03-10 21:31:36,045 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 2246 DAG size of output: 1463 [2021-03-10 21:31:36,264 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1055 DAG size of output: 1370 [2021-03-10 21:31:39,571 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 1807 DAG size of output: 1239 [2021-03-10 21:31:39,752 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 2561 DAG size of output: 1548 [2021-03-10 21:31:39,948 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 2626 DAG size of output: 1613 [2021-03-10 21:31:40,339 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 4469 DAG size of output: 2679 [2021-03-10 21:31:40,757 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification. DAG size of input: 4518 DAG size of output: 2724 [2021-03-10 21:31:41,258 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 4549 DAG size of output: 2749 [2021-03-10 21:31:41,696 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 4549 DAG size of output: 2749 [2021-03-10 21:31:42,415 WARN L205 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 4560 DAG size of output: 3263 [2021-03-10 21:31:42,787 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 2535 DAG size of output: 2376 [2021-03-10 21:31:43,038 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 1656 DAG size of output: 1457 [2021-03-10 21:31:43,287 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 1454 DAG size of output: 1895 [2021-03-10 21:31:43,489 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 1604 [2021-03-10 21:31:43,612 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1403 DAG size of output: 1401 [2021-03-10 21:31:43,769 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 1379 DAG size of output: 1475 [2021-03-10 21:31:43,907 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 1375 DAG size of output: 1390 [2021-03-10 21:31:44,021 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1360 DAG size of output: 1356 [2021-03-10 21:31:46,793 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 2149 DAG size of output: 869 [2021-03-10 21:31:47,040 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 2918 DAG size of output: 1198 [2021-03-10 21:31:47,211 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 2918 DAG size of output: 1198 [2021-03-10 21:31:47,396 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 2924 DAG size of output: 1204 [2021-03-10 21:31:47,544 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 1206 DAG size of output: 1223 [2021-03-10 21:31:47,698 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 1153 DAG size of output: 1369 [2021-03-10 21:31:50,083 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1387 DAG size of output: 866 [2021-03-10 21:31:51,618 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 2076 DAG size of output: 1306 [2021-03-10 21:31:51,819 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 2159 DAG size of output: 1362 [2021-03-10 21:31:52,882 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 695 DAG size of output: 543 [2021-03-10 21:31:54,980 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 1425 DAG size of output: 901 [2021-03-10 21:31:55,151 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 2035 DAG size of output: 1229 [2021-03-10 21:31:55,333 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 2135 DAG size of output: 1280 [2021-03-10 21:31:55,717 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 3612 DAG size of output: 2109 [2021-03-10 21:31:56,132 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 3756 DAG size of output: 2177 [2021-03-10 21:31:56,299 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1051 DAG size of output: 1315 [2021-03-10 21:31:58,558 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 740 DAG size of output: 917 [2021-03-10 21:32:01,530 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 1688 DAG size of output: 1244 [2021-03-10 21:32:03,993 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1456 DAG size of output: 987 [2021-03-10 21:32:05,388 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 2083 DAG size of output: 1372 [2021-03-10 21:32:05,719 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 3330 DAG size of output: 2098 [2021-03-10 21:32:06,155 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 4362 DAG size of output: 2671 [2021-03-10 21:32:06,682 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 4824 DAG size of output: 2898 [2021-03-10 21:32:07,563 WARN L205 SmtUtils]: Spent 856.00 ms on a formula simplification. DAG size of input: 7881 DAG size of output: 4334 [2021-03-10 21:32:08,558 WARN L205 SmtUtils]: Spent 958.00 ms on a formula simplification. DAG size of input: 8087 DAG size of output: 4543 [2021-03-10 21:32:09,514 WARN L205 SmtUtils]: Spent 920.00 ms on a formula simplification. DAG size of input: 8087 DAG size of output: 4543 [2021-03-10 21:32:10,554 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 8090 DAG size of output: 4527 [2021-03-10 21:32:11,178 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 4523 DAG size of output: 4400 [2021-03-10 21:32:12,112 WARN L205 SmtUtils]: Spent 903.00 ms on a formula simplification. DAG size of input: 4402 DAG size of output: 4688 [2021-03-10 21:32:12,553 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 2760 DAG size of output: 2375 [2021-03-10 21:32:12,746 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 1674 DAG size of output: 1559 [2021-03-10 21:32:13,018 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 1503 DAG size of output: 1502 [2021-03-10 21:32:13,164 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1416 DAG size of output: 1416 [2021-03-10 21:32:14,922 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1498 DAG size of output: 746 [2021-03-10 21:32:15,399 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1671 DAG size of output: 806 [2021-03-10 21:32:15,859 WARN L205 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 2499 DAG size of output: 2090 [2021-03-10 21:32:16,025 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 1311 DAG size of output: 1300 [2021-03-10 21:32:16,157 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1208 DAG size of output: 1208 [2021-03-10 21:32:16,281 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1177 DAG size of output: 1177 [2021-03-10 21:32:18,214 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1777 DAG size of output: 800 [2021-03-10 21:32:18,467 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 3145 DAG size of output: 1262 [2021-03-10 21:32:18,723 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 3145 DAG size of output: 1262 [2021-03-10 21:32:18,995 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 3149 DAG size of output: 1267 [2021-03-10 21:32:20,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:32:20,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:20,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:32:20,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-03-10 21:32:20,847 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:20,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:20,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-03-10 21:32:20,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116232253] [2021-03-10 21:32:20,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:32:20,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:20,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:32:20,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:32:20,847 INFO L87 Difference]: Start difference. First operand 13640 states and 43942 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:21,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:21,341 INFO L93 Difference]: Finished difference Result 14010 states and 44824 transitions. [2021-03-10 21:32:21,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:32:21,342 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:32:21,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:21,360 INFO L225 Difference]: With dead ends: 14010 [2021-03-10 21:32:21,360 INFO L226 Difference]: Without dead ends: 14007 [2021-03-10 21:32:21,360 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 375.5ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:32:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14007 states. [2021-03-10 21:32:21,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14007 to 13806. [2021-03-10 21:32:21,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13806 states, 13805 states have (on average 3.2249185077870335) internal successors, (44520), 13805 states have internal predecessors, (44520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:21,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13806 states to 13806 states and 44520 transitions. [2021-03-10 21:32:21,552 INFO L78 Accepts]: Start accepts. Automaton has 13806 states and 44520 transitions. Word has length 24 [2021-03-10 21:32:21,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:21,552 INFO L480 AbstractCegarLoop]: Abstraction has 13806 states and 44520 transitions. [2021-03-10 21:32:21,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:21,552 INFO L276 IsEmpty]: Start isEmpty. Operand 13806 states and 44520 transitions. [2021-03-10 21:32:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:32:21,561 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:21,561 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:21,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32790,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:21,764 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:21,765 INFO L82 PathProgramCache]: Analyzing trace with hash -629300488, now seen corresponding path program 234 times [2021-03-10 21:32:21,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:21,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142382485] [2021-03-10 21:32:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:21,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142382485] [2021-03-10 21:32:21,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488485820] [2021-03-10 21:32:21,861 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:21,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:32:21,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:21,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:32:21,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:22,547 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-03-10 21:32:22,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:32:22,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-03-10 21:32:25,088 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1885 DAG size of output: 918 [2021-03-10 21:32:25,288 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 1911 DAG size of output: 943 [2021-03-10 21:32:25,415 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1911 DAG size of output: 943 [2021-03-10 21:32:25,550 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1924 DAG size of output: 957 [2021-03-10 21:32:25,670 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 1017 [2021-03-10 21:32:27,412 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 931 DAG size of output: 740 [2021-03-10 21:32:27,614 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1697 DAG size of output: 1125 [2021-03-10 21:32:27,738 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1697 DAG size of output: 1125 [2021-03-10 21:32:27,868 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1707 DAG size of output: 1135 [2021-03-10 21:32:28,025 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 1336 [2021-03-10 21:32:30,858 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 1373 DAG size of output: 1011 [2021-03-10 21:32:31,040 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1396 DAG size of output: 1028 [2021-03-10 21:32:32,252 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 1806 DAG size of output: 1363 [2021-03-10 21:32:34,074 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 931 DAG size of output: 797 [2021-03-10 21:32:34,536 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 2473 DAG size of output: 1978 [2021-03-10 21:32:34,649 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 788 DAG size of output: 929 [2021-03-10 21:32:36,786 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1066 DAG size of output: 836 [2021-03-10 21:32:37,753 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 1331 DAG size of output: 1001 [2021-03-10 21:32:37,979 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 747 DAG size of output: 808 [2021-03-10 21:32:39,815 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 1207 DAG size of output: 955 [2021-03-10 21:32:40,849 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 1741 DAG size of output: 1264 [2021-03-10 21:32:42,388 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 999 DAG size of output: 630 [2021-03-10 21:32:42,695 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 2374 DAG size of output: 1590 [2021-03-10 21:32:43,011 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 2388 DAG size of output: 1600 [2021-03-10 21:32:43,612 WARN L205 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 3265 DAG size of output: 2312 [2021-03-10 21:32:44,597 WARN L205 SmtUtils]: Spent 965.00 ms on a formula simplification. DAG size of input: 5311 DAG size of output: 3930 [2021-03-10 21:32:45,648 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 5311 DAG size of output: 3930 [2021-03-10 21:32:46,754 WARN L205 SmtUtils]: Spent 1.09 s on a formula simplification. DAG size of input: 5318 DAG size of output: 3937 [2021-03-10 21:32:47,710 WARN L205 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 3939 DAG size of output: 3258 [2021-03-10 21:32:48,428 WARN L205 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 3140 DAG size of output: 3099 [2021-03-10 21:32:48,663 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 1068 DAG size of output: 1075 [2021-03-10 21:32:48,850 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 1062 DAG size of output: 1031 [2021-03-10 21:32:49,086 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 1093 [2021-03-10 21:32:49,229 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 939 DAG size of output: 938 [2021-03-10 21:32:50,942 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 1760 DAG size of output: 1758 [2021-03-10 21:32:51,260 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 1196 DAG size of output: 1196 [2021-03-10 21:32:51,390 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 835 [2021-03-10 21:32:53,520 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 646 [2021-03-10 21:32:54,181 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 1968 DAG size of output: 788 [2021-03-10 21:32:55,448 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 3547 DAG size of output: 1474 [2021-03-10 21:32:55,833 WARN L205 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 3827 DAG size of output: 1502 [2021-03-10 21:32:56,168 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 3827 DAG size of output: 1502 [2021-03-10 21:32:56,524 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 3831 DAG size of output: 1506 [2021-03-10 21:32:56,853 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 1508 DAG size of output: 1846 [2021-03-10 21:32:57,158 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 1439 DAG size of output: 1661 [2021-03-10 21:32:57,360 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 1351 DAG size of output: 1419 [2021-03-10 21:32:58,037 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1327 DAG size of output: 1293 [2021-03-10 21:32:58,181 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 1258 DAG size of output: 1224 [2021-03-10 21:33:01,833 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1964 DAG size of output: 1228 [2021-03-10 21:33:02,236 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 2067 DAG size of output: 1291 [2021-03-10 21:33:02,446 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 2378 DAG size of output: 1331 [2021-03-10 21:33:04,548 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 3284 DAG size of output: 1905 [2021-03-10 21:33:04,669 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 625 DAG size of output: 747 [2021-03-10 21:33:07,153 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1313 DAG size of output: 822 [2021-03-10 21:33:07,285 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1600 DAG size of output: 887 [2021-03-10 21:33:08,797 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 2332 DAG size of output: 1366 [2021-03-10 21:33:09,310 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 5160 DAG size of output: 2757 [2021-03-10 21:33:09,883 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 5160 DAG size of output: 2757 [2021-03-10 21:33:10,420 WARN L205 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 5163 DAG size of output: 2759 [2021-03-10 21:33:10,867 WARN L205 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 2762 DAG size of output: 2349 [2021-03-10 21:33:11,171 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 1795 DAG size of output: 1895 [2021-03-10 21:33:11,286 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1163 DAG size of output: 1141 [2021-03-10 21:33:11,405 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 834 DAG size of output: 832 [2021-03-10 21:33:13,219 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1815 DAG size of output: 901 [2021-03-10 21:33:14,131 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 2334 DAG size of output: 1195 [2021-03-10 21:33:14,295 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 2334 DAG size of output: 1195 [2021-03-10 21:33:14,463 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 2337 DAG size of output: 1198 [2021-03-10 21:33:14,590 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1200 DAG size of output: 1179 [2021-03-10 21:33:15,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:15,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:15,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:33:15,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-03-10 21:33:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:15,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:15,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-03-10 21:33:15,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872189022] [2021-03-10 21:33:15,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:33:15,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:15,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:33:15,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:33:15,747 INFO L87 Difference]: Start difference. First operand 13806 states and 44520 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:16,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:16,304 INFO L93 Difference]: Finished difference Result 14223 states and 45525 transitions. [2021-03-10 21:33:16,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:33:16,305 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:33:16,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:16,324 INFO L225 Difference]: With dead ends: 14223 [2021-03-10 21:33:16,324 INFO L226 Difference]: Without dead ends: 14220 [2021-03-10 21:33:16,324 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 363.1ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:33:16,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14220 states. [2021-03-10 21:33:16,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14220 to 13986. [2021-03-10 21:33:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13986 states, 13985 states have (on average 3.229245620307472) internal successors, (45161), 13985 states have internal predecessors, (45161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13986 states to 13986 states and 45161 transitions. [2021-03-10 21:33:16,515 INFO L78 Accepts]: Start accepts. Automaton has 13986 states and 45161 transitions. Word has length 24 [2021-03-10 21:33:16,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:16,515 INFO L480 AbstractCegarLoop]: Abstraction has 13986 states and 45161 transitions. [2021-03-10 21:33:16,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:16,515 INFO L276 IsEmpty]: Start isEmpty. Operand 13986 states and 45161 transitions. [2021-03-10 21:33:16,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:33:16,525 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:16,525 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:16,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42750,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:16,740 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:16,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:16,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2072056320, now seen corresponding path program 235 times [2021-03-10 21:33:16,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:16,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418590517] [2021-03-10 21:33:16,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:16,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418590517] [2021-03-10 21:33:16,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979717251] [2021-03-10 21:33:16,833 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:16,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:33:16,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:17,510 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-03-10 21:33:17,510 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:17,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-03-10 21:33:19,218 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 1385 DAG size of output: 1222 [2021-03-10 21:33:20,999 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 2556 DAG size of output: 2220 [2021-03-10 21:33:21,186 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 2556 DAG size of output: 2220 [2021-03-10 21:33:21,453 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 2567 DAG size of output: 2231 [2021-03-10 21:33:21,623 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 2231 DAG size of output: 2102 [2021-03-10 21:33:23,781 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 2025 DAG size of output: 1334 [2021-03-10 21:33:23,990 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 2894 DAG size of output: 1947 [2021-03-10 21:33:24,200 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 2894 DAG size of output: 1947 [2021-03-10 21:33:24,433 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 2901 DAG size of output: 1958 [2021-03-10 21:33:24,587 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 1951 DAG size of output: 1839 [2021-03-10 21:33:24,760 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 1841 DAG size of output: 1835 [2021-03-10 21:33:24,902 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1812 DAG size of output: 1812 [2021-03-10 21:33:25,813 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1223 DAG size of output: 1051 [2021-03-10 21:33:26,691 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1641 DAG size of output: 1054 [2021-03-10 21:33:26,814 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1677 DAG size of output: 1091 [2021-03-10 21:33:26,936 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1677 DAG size of output: 1091 [2021-03-10 21:33:27,138 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 1683 DAG size of output: 1219 [2021-03-10 21:33:27,320 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 1039 DAG size of output: 1134 [2021-03-10 21:33:27,445 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 977 DAG size of output: 1294 [2021-03-10 21:33:30,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:33:30,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:30,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:33:30,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-03-10 21:33:30,488 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:30,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:30,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-03-10 21:33:30,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911077948] [2021-03-10 21:33:30,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:33:30,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:30,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:33:30,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:33:30,489 INFO L87 Difference]: Start difference. First operand 13986 states and 45161 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:30,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:30,994 INFO L93 Difference]: Finished difference Result 14385 states and 46101 transitions. [2021-03-10 21:33:30,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:33:30,994 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:33:30,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:31,015 INFO L225 Difference]: With dead ends: 14385 [2021-03-10 21:33:31,015 INFO L226 Difference]: Without dead ends: 14382 [2021-03-10 21:33:31,015 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:33:31,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14382 states. [2021-03-10 21:33:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14382 to 14142. [2021-03-10 21:33:31,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14142 states, 14141 states have (on average 3.233646842514674) internal successors, (45727), 14141 states have internal predecessors, (45727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:31,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14142 states to 14142 states and 45727 transitions. [2021-03-10 21:33:31,215 INFO L78 Accepts]: Start accepts. Automaton has 14142 states and 45727 transitions. Word has length 24 [2021-03-10 21:33:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:31,215 INFO L480 AbstractCegarLoop]: Abstraction has 14142 states and 45727 transitions. [2021-03-10 21:33:31,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:31,215 INFO L276 IsEmpty]: Start isEmpty. Operand 14142 states and 45727 transitions. [2021-03-10 21:33:31,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:33:31,225 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:31,225 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:31,446 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49855 [2021-03-10 21:33:31,446 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:31,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:31,446 INFO L82 PathProgramCache]: Analyzing trace with hash 447153144, now seen corresponding path program 236 times [2021-03-10 21:33:31,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:31,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6944207] [2021-03-10 21:33:31,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:31,543 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:33:31,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6944207] [2021-03-10 21:33:31,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882034673] [2021-03-10 21:33:31,543 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:31,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:31,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:31,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:33:31,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:32,223 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-03-10 21:33:32,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:33:32,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-03-10 21:33:35,130 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 228 [2021-03-10 21:33:35,452 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 2562 DAG size of output: 1823 [2021-03-10 21:33:35,614 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 2581 DAG size of output: 1839 [2021-03-10 21:33:35,787 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 2605 DAG size of output: 1846 [2021-03-10 21:33:35,961 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 2605 DAG size of output: 1846 [2021-03-10 21:33:36,157 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 2624 DAG size of output: 1865 [2021-03-10 21:33:36,384 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 1867 DAG size of output: 2280 [2021-03-10 21:33:36,599 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 904 DAG size of output: 1078 [2021-03-10 21:33:36,821 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 899 DAG size of output: 1242 [2021-03-10 21:33:39,623 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1039 DAG size of output: 873 [2021-03-10 21:33:39,754 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1127 DAG size of output: 964 [2021-03-10 21:33:39,905 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1268 DAG size of output: 1076 [2021-03-10 21:33:40,067 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 1480 DAG size of output: 1122 [2021-03-10 21:33:41,672 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 1971 DAG size of output: 1455 [2021-03-10 21:33:41,911 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 2040 DAG size of output: 1463 [2021-03-10 21:33:43,138 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 295 DAG size of output: 267 [2021-03-10 21:33:44,735 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1213 DAG size of output: 943 [2021-03-10 21:33:44,855 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1385 DAG size of output: 1017 [2021-03-10 21:33:46,309 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 1836 DAG size of output: 1325 [2021-03-10 21:33:46,532 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 2261 DAG size of output: 1632 [2021-03-10 21:33:46,781 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 2581 DAG size of output: 1736 [2021-03-10 21:33:47,078 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 2933 DAG size of output: 2029 [2021-03-10 21:33:47,490 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 3007 DAG size of output: 2053 [2021-03-10 21:33:48,050 WARN L205 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 4540 DAG size of output: 3063 [2021-03-10 21:33:48,185 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 899 DAG size of output: 1237 [2021-03-10 21:33:52,412 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1343 DAG size of output: 1009 [2021-03-10 21:33:52,583 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 1750 DAG size of output: 1348 [2021-03-10 21:33:52,799 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 2122 DAG size of output: 1668 [2021-03-10 21:33:53,061 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 2558 DAG size of output: 1972 [2021-03-10 21:33:53,417 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 2908 DAG size of output: 2098 [2021-03-10 21:33:53,747 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 3260 DAG size of output: 2388 [2021-03-10 21:33:54,121 WARN L205 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 3460 DAG size of output: 2480 [2021-03-10 21:33:54,254 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 894 DAG size of output: 1163 [2021-03-10 21:33:58,144 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1104 DAG size of output: 995 [2021-03-10 21:33:58,271 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 1291 DAG size of output: 1029 [2021-03-10 21:33:58,432 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 1555 DAG size of output: 1221 [2021-03-10 21:33:58,668 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 2189 DAG size of output: 1663 [2021-03-10 21:33:59,093 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 2365 DAG size of output: 1749 [2021-03-10 21:33:59,477 WARN L205 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 2807 DAG size of output: 2066 [2021-03-10 21:34:00,187 WARN L205 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 5660 DAG size of output: 4045 [2021-03-10 21:34:01,532 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 8759 DAG size of output: 5980 [2021-03-10 21:34:02,863 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 8784 DAG size of output: 5666 [2021-03-10 21:34:03,050 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 1859 DAG size of output: 1819 [2021-03-10 21:34:03,183 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 1793 [2021-03-10 21:34:03,427 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 1766 DAG size of output: 2099 [2021-03-10 21:34:03,548 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 1759 [2021-03-10 21:34:03,701 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 1295 DAG size of output: 1811 [2021-03-10 21:34:03,813 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1262 DAG size of output: 1302 [2021-03-10 21:34:06,181 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1251 DAG size of output: 1018 [2021-03-10 21:34:06,301 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1332 DAG size of output: 1092 [2021-03-10 21:34:06,439 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1520 DAG size of output: 1240 [2021-03-10 21:34:06,647 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 1666 DAG size of output: 1406 [2021-03-10 21:34:06,828 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 1849 DAG size of output: 1459 [2021-03-10 21:34:07,069 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 2559 DAG size of output: 1973 [2021-03-10 21:34:09,600 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1530 DAG size of output: 1253 [2021-03-10 21:34:09,757 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1854 DAG size of output: 1451 [2021-03-10 21:34:09,944 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 2107 DAG size of output: 1697 [2021-03-10 21:34:10,191 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 2695 DAG size of output: 2119 [2021-03-10 21:34:10,735 WARN L205 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 4676 DAG size of output: 3586 [2021-03-10 21:34:13,733 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 1675 DAG size of output: 1379 [2021-03-10 21:34:13,932 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 2017 DAG size of output: 1624 [2021-03-10 21:34:14,695 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 6264 DAG size of output: 4898 [2021-03-10 21:34:14,956 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 1763 DAG size of output: 2470 [2021-03-10 21:34:15,141 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 1758 DAG size of output: 1813 [2021-03-10 21:34:15,256 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 871 DAG size of output: 1143 [2021-03-10 21:34:19,384 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 1984 DAG size of output: 1323 [2021-03-10 21:34:19,588 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 2360 DAG size of output: 1652 [2021-03-10 21:34:19,820 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 2630 DAG size of output: 1780 [2021-03-10 21:34:20,107 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 3035 DAG size of output: 2183 [2021-03-10 21:34:20,503 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 4102 DAG size of output: 2959 [2021-03-10 21:34:20,707 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 1380 DAG size of output: 1392 [2021-03-10 21:34:23,036 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 1345 DAG size of output: 1115 [2021-03-10 21:34:23,176 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 1660 DAG size of output: 1313 [2021-03-10 21:34:23,344 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 1913 DAG size of output: 1543 [2021-03-10 21:34:24,866 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 2602 DAG size of output: 2007 [2021-03-10 21:34:25,257 WARN L205 SmtUtils]: Spent 373.00 ms on a formula simplification. DAG size of input: 3466 DAG size of output: 2722 [2021-03-10 21:34:26,023 WARN L205 SmtUtils]: Spent 745.00 ms on a formula simplification. DAG size of input: 6799 DAG size of output: 4973 [2021-03-10 21:34:27,556 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 11055 DAG size of output: 8214 [2021-03-10 21:34:29,836 WARN L205 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 11454 DAG size of output: 8236 [2021-03-10 21:34:31,534 WARN L205 SmtUtils]: Spent 1.65 s on a formula simplification. DAG size of input: 11488 DAG size of output: 7946 [2021-03-10 21:34:34,619 WARN L205 SmtUtils]: Spent 3.03 s on a formula simplification. DAG size of input: 18266 DAG size of output: 12205 [2021-03-10 21:34:37,724 WARN L205 SmtUtils]: Spent 3.03 s on a formula simplification. DAG size of input: 18266 DAG size of output: 12205 [2021-03-10 21:34:41,031 WARN L205 SmtUtils]: Spent 3.25 s on a formula simplification. DAG size of input: 18281 DAG size of output: 12220 [2021-03-10 21:34:43,279 WARN L205 SmtUtils]: Spent 2.21 s on a formula simplification. DAG size of input: 12214 DAG size of output: 11434 [2021-03-10 21:34:46,027 WARN L205 SmtUtils]: Spent 2.68 s on a formula simplification. DAG size of input: 11436 DAG size of output: 11343 [2021-03-10 21:34:47,549 WARN L205 SmtUtils]: Spent 1.47 s on a formula simplification. DAG size of input: 5060 DAG size of output: 7309 [2021-03-10 21:34:48,237 WARN L205 SmtUtils]: Spent 655.00 ms on a formula simplification. DAG size of input: 3922 DAG size of output: 2474 [2021-03-10 21:34:48,576 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 2474 DAG size of output: 2390 [2021-03-10 21:34:48,722 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1216 DAG size of output: 1202 [2021-03-10 21:34:48,895 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 1202 DAG size of output: 1294 [2021-03-10 21:34:49,547 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 1201 DAG size of output: 1220 [2021-03-10 21:34:49,754 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 875 DAG size of output: 1277 [2021-03-10 21:34:49,866 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 863 [2021-03-10 21:34:51,944 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1349 DAG size of output: 1036 [2021-03-10 21:34:52,057 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 806 [2021-03-10 21:34:54,048 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 2031 DAG size of output: 1489 [2021-03-10 21:34:54,314 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 2222 DAG size of output: 1620 [2021-03-10 21:34:54,585 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 2223 DAG size of output: 1621 [2021-03-10 21:34:54,770 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 1555 DAG size of output: 1550 [2021-03-10 21:34:55,029 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 1525 DAG size of output: 1650 [2021-03-10 21:34:55,276 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 1524 DAG size of output: 1761 [2021-03-10 21:34:55,451 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 653 DAG size of output: 818 [2021-03-10 21:34:57,629 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 1453 DAG size of output: 1737 [2021-03-10 21:34:57,774 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 921 DAG size of output: 1031 [2021-03-10 21:34:59,313 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 1236 DAG size of output: 1336 [2021-03-10 21:34:59,864 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1078 DAG size of output: 1077 [2021-03-10 21:35:01,034 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1401 DAG size of output: 1029 [2021-03-10 21:35:01,265 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 2051 DAG size of output: 1488 [2021-03-10 21:35:01,584 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 2632 DAG size of output: 1772 [2021-03-10 21:35:02,583 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 2903 DAG size of output: 1944 [2021-03-10 21:35:02,965 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 2934 DAG size of output: 1961 [2021-03-10 21:35:03,641 WARN L205 SmtUtils]: Spent 661.00 ms on a formula simplification. DAG size of input: 4648 DAG size of output: 3060 [2021-03-10 21:35:04,274 WARN L205 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 4648 DAG size of output: 3060 [2021-03-10 21:35:05,056 WARN L205 SmtUtils]: Spent 746.00 ms on a formula simplification. DAG size of input: 4467 DAG size of output: 3439 [2021-03-10 21:35:05,571 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 2696 DAG size of output: 2762 [2021-03-10 21:35:07,622 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 2496 DAG size of output: 2490 [2021-03-10 21:35:07,865 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 1479 DAG size of output: 1676 [2021-03-10 21:35:08,150 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 1886 [2021-03-10 21:35:08,381 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 938 DAG size of output: 1037 [2021-03-10 21:35:08,831 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 816 DAG size of output: 812 [2021-03-10 21:35:09,824 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 1362 DAG size of output: 1407 [2021-03-10 21:35:10,329 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1166 DAG size of output: 1165 [2021-03-10 21:35:10,446 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1139 DAG size of output: 1139 [2021-03-10 21:35:10,604 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 1084 DAG size of output: 1084 [2021-03-10 21:35:11,746 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1546 DAG size of output: 1061 [2021-03-10 21:35:11,982 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 2257 DAG size of output: 1488 [2021-03-10 21:35:12,107 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 707 DAG size of output: 891 [2021-03-10 21:35:14,427 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1187 DAG size of output: 880 [2021-03-10 21:35:14,775 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 2982 DAG size of output: 1893 [2021-03-10 21:35:14,955 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 1407 DAG size of output: 1401 [2021-03-10 21:35:15,172 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 1401 DAG size of output: 1408 [2021-03-10 21:35:15,313 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 981 [2021-03-10 21:35:17,894 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 1183 DAG size of output: 902 [2021-03-10 21:35:18,099 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 1009 DAG size of output: 1474 [2021-03-10 21:35:20,685 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 1539 DAG size of output: 1154 [2021-03-10 21:35:20,982 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 2441 DAG size of output: 1761 [2021-03-10 21:35:21,324 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 2442 DAG size of output: 1762 [2021-03-10 21:35:21,967 WARN L205 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 4855 DAG size of output: 3087 [2021-03-10 21:35:22,708 WARN L205 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 5468 DAG size of output: 3447 [2021-03-10 21:35:23,650 WARN L205 SmtUtils]: Spent 843.00 ms on a formula simplification. DAG size of input: 6028 DAG size of output: 3797 [2021-03-10 21:35:24,899 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 9483 DAG size of output: 4911 [2021-03-10 21:35:27,815 WARN L205 SmtUtils]: Spent 2.84 s on a formula simplification. DAG size of input: 9493 DAG size of output: 13413 [2021-03-10 21:35:29,244 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 8568 DAG size of output: 5460 [2021-03-10 21:35:29,986 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 4451 DAG size of output: 4124 [2021-03-10 21:35:30,314 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 2673 DAG size of output: 2666 [2021-03-10 21:35:30,736 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 2641 DAG size of output: 2914 [2021-03-10 21:35:31,006 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 2418 DAG size of output: 2418 [2021-03-10 21:35:31,362 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 2345 DAG size of output: 2575 [2021-03-10 21:35:31,610 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 2342 [2021-03-10 21:35:31,853 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 1293 DAG size of output: 1802 [2021-03-10 21:35:31,984 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1287 DAG size of output: 1287 [2021-03-10 21:35:34,227 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 2006 DAG size of output: 1110 [2021-03-10 21:35:34,336 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 1317 [2021-03-10 21:35:35,404 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1672 DAG size of output: 1205 [2021-03-10 21:35:35,706 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 3415 DAG size of output: 2104 [2021-03-10 21:35:36,648 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 3759 DAG size of output: 2297 [2021-03-10 21:35:37,020 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 3835 DAG size of output: 2364 [2021-03-10 21:35:37,137 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1103 DAG size of output: 1100 [2021-03-10 21:35:37,266 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 1041 DAG size of output: 1145 [2021-03-10 21:35:38,862 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 663 DAG size of output: 909 [2021-03-10 21:35:40,921 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 808 [2021-03-10 21:35:41,085 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 1823 DAG size of output: 1252 [2021-03-10 21:35:41,279 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 2036 DAG size of output: 1406 [2021-03-10 21:35:41,493 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 2097 DAG size of output: 1456 [2021-03-10 21:35:42,142 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 5155 DAG size of output: 3245 [2021-03-10 21:35:42,772 WARN L205 SmtUtils]: Spent 607.00 ms on a formula simplification. DAG size of input: 5190 DAG size of output: 3246 [2021-03-10 21:35:43,126 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 2109 DAG size of output: 2205 [2021-03-10 21:35:43,407 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 2076 DAG size of output: 2070 [2021-03-10 21:35:43,765 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 2070 DAG size of output: 1964 [2021-03-10 21:35:45,263 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 583 [2021-03-10 21:35:46,175 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1238 DAG size of output: 888 [2021-03-10 21:35:46,471 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 1323 DAG size of output: 1975 [2021-03-10 21:35:46,587 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 1003 DAG size of output: 981 [2021-03-10 21:35:47,737 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1292 DAG size of output: 1290 [2021-03-10 21:35:49,029 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1162 DAG size of output: 894 [2021-03-10 21:35:49,216 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 1741 DAG size of output: 1256 [2021-03-10 21:35:49,533 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 2711 DAG size of output: 1907 [2021-03-10 21:35:49,865 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 2712 DAG size of output: 1908 [2021-03-10 21:35:50,495 WARN L205 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 2843 DAG size of output: 1949 [2021-03-10 21:35:51,432 WARN L205 SmtUtils]: Spent 918.00 ms on a formula simplification. DAG size of input: 7349 DAG size of output: 4434 [2021-03-10 21:35:52,522 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 8338 DAG size of output: 4796 [2021-03-10 21:35:53,641 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 6321 DAG size of output: 3609 [2021-03-10 21:35:54,166 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 3609 DAG size of output: 3359 [2021-03-10 21:35:54,554 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 2272 DAG size of output: 2447 [2021-03-10 21:35:54,704 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 1037 DAG size of output: 1147 [2021-03-10 21:35:54,898 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 1033 DAG size of output: 1357 [2021-03-10 21:35:56,328 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 989 DAG size of output: 912 [2021-03-10 21:35:57,105 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 764 DAG size of output: 764 [2021-03-10 21:35:58,330 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 1705 DAG size of output: 1141 [2021-03-10 21:35:59,088 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 1907 DAG size of output: 1295 [2021-03-10 21:35:59,332 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 2073 DAG size of output: 2073 [2021-03-10 21:35:59,644 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 2048 DAG size of output: 2252 [2021-03-10 21:36:00,625 WARN L205 SmtUtils]: Spent 440.00 ms on a formula simplification. DAG size of input: 2047 DAG size of output: 2493 [2021-03-10 21:36:00,921 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 1688 DAG size of output: 1899 [2021-03-10 21:36:01,821 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1576 DAG size of output: 1576 [2021-03-10 21:36:01,987 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 1514 [2021-03-10 21:36:03,242 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1544 DAG size of output: 1064 [2021-03-10 21:36:03,384 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1606 DAG size of output: 1128 [2021-03-10 21:36:03,588 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 2074 DAG size of output: 1426 [2021-03-10 21:36:03,823 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 1352 DAG size of output: 1548 [2021-03-10 21:36:04,002 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 1272 DAG size of output: 1268 [2021-03-10 21:36:04,129 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 1236 [2021-03-10 21:36:05,930 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 1633 DAG size of output: 976 [2021-03-10 21:36:06,279 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 3210 DAG size of output: 2003 [2021-03-10 21:36:06,677 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 3435 DAG size of output: 2157 [2021-03-10 21:36:07,091 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 3471 DAG size of output: 2176 [2021-03-10 21:36:07,756 WARN L205 SmtUtils]: Spent 649.00 ms on a formula simplification. DAG size of input: 4709 DAG size of output: 2988 [2021-03-10 21:36:07,978 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 1622 DAG size of output: 1605 [2021-03-10 21:36:08,181 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1603 DAG size of output: 1603 [2021-03-10 21:36:08,313 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 825 [2021-03-10 21:36:10,667 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 763 DAG size of output: 551 [2021-03-10 21:36:10,891 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1304 DAG size of output: 894 [2021-03-10 21:36:13,459 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 1438 DAG size of output: 1021 [2021-03-10 21:36:13,762 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 2485 DAG size of output: 1693 [2021-03-10 21:36:14,113 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 2486 DAG size of output: 1694 [2021-03-10 21:36:15,013 WARN L205 SmtUtils]: Spent 883.00 ms on a formula simplification. DAG size of input: 6632 DAG size of output: 4056 [2021-03-10 21:36:15,970 WARN L205 SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 6632 DAG size of output: 4056 [2021-03-10 21:36:17,973 WARN L205 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 13263 DAG size of output: 7694 [2021-03-10 21:36:21,304 WARN L205 SmtUtils]: Spent 3.27 s on a formula simplification. DAG size of input: 20522 DAG size of output: 11240 [2021-03-10 21:36:24,670 WARN L205 SmtUtils]: Spent 3.28 s on a formula simplification. DAG size of input: 20522 DAG size of output: 11240 [2021-03-10 21:36:29,334 WARN L205 SmtUtils]: Spent 4.54 s on a formula simplification. DAG size of input: 20530 DAG size of output: 11901 [2021-03-10 21:36:30,978 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 8921 DAG size of output: 8023 [2021-03-10 21:36:31,158 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 996 DAG size of output: 1000 [2021-03-10 21:36:31,408 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 915 [2021-03-10 21:36:32,039 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1048 DAG size of output: 637 [2021-03-10 21:36:32,202 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 1061 DAG size of output: 650 [2021-03-10 21:36:32,782 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 872 [2021-03-10 21:36:33,027 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 1206 DAG size of output: 1284 [2021-03-10 21:36:33,250 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 796 [2021-03-10 21:36:34,291 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 981 DAG size of output: 1117 [2021-03-10 21:36:34,520 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 966 DAG size of output: 1350 [2021-03-10 21:36:34,733 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 964 DAG size of output: 1295 [2021-03-10 21:36:34,862 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 864 DAG size of output: 861 [2021-03-10 21:36:35,742 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1464 DAG size of output: 883 [2021-03-10 21:36:36,595 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 2109 DAG size of output: 1276 [2021-03-10 21:36:37,304 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 2479 DAG size of output: 1516 [2021-03-10 21:36:37,657 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 3059 DAG size of output: 1968 [2021-03-10 21:36:39,030 WARN L205 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 10311 DAG size of output: 6180 [2021-03-10 21:36:39,921 WARN L205 SmtUtils]: Spent 810.00 ms on a formula simplification. DAG size of input: 4861 DAG size of output: 4452 [2021-03-10 21:36:40,114 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 1537 DAG size of output: 1532 [2021-03-10 21:36:41,181 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1757 DAG size of output: 1030 [2021-03-10 21:36:41,452 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 1585 DAG size of output: 1530 [2021-03-10 21:36:42,319 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1170 DAG size of output: 1308 [2021-03-10 21:36:42,603 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 1135 DAG size of output: 1582 [2021-03-10 21:36:42,728 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 873 DAG size of output: 845 [2021-03-10 21:36:43,474 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 1133 DAG size of output: 1439 [2021-03-10 21:36:43,617 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 919 DAG size of output: 892 [2021-03-10 21:36:44,583 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1516 DAG size of output: 930 [2021-03-10 21:36:44,769 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 2136 DAG size of output: 1086 [2021-03-10 21:36:45,399 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 2423 DAG size of output: 1259 [2021-03-10 21:36:45,698 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 2840 DAG size of output: 1583 [2021-03-10 21:36:46,285 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 5918 DAG size of output: 3328 [2021-03-10 21:36:48,182 WARN L205 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 14656 DAG size of output: 8395 [2021-03-10 21:36:50,147 WARN L205 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 14656 DAG size of output: 8395 [2021-03-10 21:36:52,099 WARN L205 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 14661 DAG size of output: 8400 [2021-03-10 21:36:53,720 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 8402 DAG size of output: 7384 [2021-03-10 21:36:54,552 WARN L205 SmtUtils]: Spent 794.00 ms on a formula simplification. DAG size of input: 5666 DAG size of output: 5157 [2021-03-10 21:36:55,814 WARN L205 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 5285 DAG size of output: 2798 [2021-03-10 21:36:56,288 WARN L205 SmtUtils]: Spent 447.00 ms on a formula simplification. DAG size of input: 2575 DAG size of output: 2688 [2021-03-10 21:36:56,636 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 2434 DAG size of output: 1874 [2021-03-10 21:36:56,844 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 1818 DAG size of output: 1079 [2021-03-10 21:36:58,466 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 6260 DAG size of output: 2943 [2021-03-10 21:36:59,064 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 6260 DAG size of output: 2943 [2021-03-10 21:36:59,619 WARN L205 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 6264 DAG size of output: 2947 [2021-03-10 21:36:59,893 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 2949 DAG size of output: 1508 [2021-03-10 21:37:00,052 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 1478 DAG size of output: 1136 [2021-03-10 21:37:00,197 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1052 DAG size of output: 1022 [2021-03-10 21:37:01,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:37:01,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:01,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:37:01,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-03-10 21:37:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:37:01,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:37:01,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-03-10 21:37:01,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338064206] [2021-03-10 21:37:01,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:37:01,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:37:01,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:37:01,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:37:01,969 INFO L87 Difference]: Start difference. First operand 14142 states and 45727 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:02,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:37:02,477 INFO L93 Difference]: Finished difference Result 14568 states and 46771 transitions. [2021-03-10 21:37:02,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:37:02,477 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:37:02,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:37:02,550 INFO L225 Difference]: With dead ends: 14568 [2021-03-10 21:37:02,550 INFO L226 Difference]: Without dead ends: 14565 [2021-03-10 21:37:02,551 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 363.0ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:37:02,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14565 states. [2021-03-10 21:37:02,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14565 to 14324. [2021-03-10 21:37:02,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14324 states, 14323 states have (on average 3.239195699225023) internal successors, (46395), 14323 states have internal predecessors, (46395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14324 states to 14324 states and 46395 transitions. [2021-03-10 21:37:02,721 INFO L78 Accepts]: Start accepts. Automaton has 14324 states and 46395 transitions. Word has length 24 [2021-03-10 21:37:02,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:37:02,722 INFO L480 AbstractCegarLoop]: Abstraction has 14324 states and 46395 transitions. [2021-03-10 21:37:02,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:37:02,722 INFO L276 IsEmpty]: Start isEmpty. Operand 14324 states and 46395 transitions. [2021-03-10 21:37:02,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:37:02,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:37:02,731 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:37:02,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52761,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:02,934 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:37:02,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:37:02,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1233235200, now seen corresponding path program 237 times [2021-03-10 21:37:02,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:37:02,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266902244] [2021-03-10 21:37:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:37:02,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:37:03,033 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:37:03,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266902244] [2021-03-10 21:37:03,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134885003] [2021-03-10 21:37:03,034 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:37:03,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:37:03,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:37:03,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:37:03,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:37:03,706 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-03-10 21:37:03,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:37:03,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-03-10 21:37:06,086 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1603 DAG size of output: 1381 [2021-03-10 21:37:06,215 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1629 DAG size of output: 1407 [2021-03-10 21:37:06,344 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 1629 DAG size of output: 1407 [2021-03-10 21:37:06,492 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1648 DAG size of output: 1426 [2021-03-10 21:37:06,623 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1426 DAG size of output: 1421 [2021-03-10 21:37:06,867 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 1399 DAG size of output: 1982 [2021-03-10 21:37:07,109 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 1328 DAG size of output: 1547 [2021-03-10 21:37:07,293 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 1255 DAG size of output: 1557 [2021-03-10 21:37:09,997 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 693 DAG size of output: 551 [2021-03-10 21:37:11,019 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1260 DAG size of output: 962 [2021-03-10 21:37:12,423 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 919 DAG size of output: 741 [2021-03-10 21:37:12,588 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1721 DAG size of output: 1233 [2021-03-10 21:37:14,891 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 494 DAG size of output: 418 [2021-03-10 21:37:16,088 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1607 DAG size of output: 1177 [2021-03-10 21:37:16,439 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 3045 DAG size of output: 2154 [2021-03-10 21:37:16,816 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 3155 DAG size of output: 2180 [2021-03-10 21:37:20,148 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1481 DAG size of output: 1238 [2021-03-10 21:37:20,382 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 1533 DAG size of output: 1275 [2021-03-10 21:37:23,233 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1177 DAG size of output: 838 [2021-03-10 21:37:23,371 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1349 DAG size of output: 1007 [2021-03-10 21:37:23,531 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 1535 DAG size of output: 1212 [2021-03-10 21:37:23,844 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 2717 DAG size of output: 1910 [2021-03-10 21:37:24,595 WARN L205 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 5471 DAG size of output: 3659 [2021-03-10 21:37:27,177 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 811 DAG size of output: 532 [2021-03-10 21:37:30,741 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1722 DAG size of output: 1054 [2021-03-10 21:37:34,188 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1189 DAG size of output: 833 [2021-03-10 21:37:37,413 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1147 DAG size of output: 735 [2021-03-10 21:37:37,625 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 2057 DAG size of output: 1253 [2021-03-10 21:37:37,854 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 2136 DAG size of output: 1311 [2021-03-10 21:37:38,350 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 3529 DAG size of output: 2127 [2021-03-10 21:37:39,480 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 8110 DAG size of output: 5148 [2021-03-10 21:37:40,770 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 8597 DAG size of output: 5417 [2021-03-10 21:37:42,219 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 9668 DAG size of output: 6313 [2021-03-10 21:37:43,768 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 10713 DAG size of output: 6436 [2021-03-10 21:37:45,459 WARN L205 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 11841 DAG size of output: 7247 [2021-03-10 21:37:47,232 WARN L205 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 11852 DAG size of output: 7262 [2021-03-10 21:37:49,010 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 11852 DAG size of output: 7262 [2021-03-10 21:37:50,901 WARN L205 SmtUtils]: Spent 1.86 s on a formula simplification. DAG size of input: 11867 DAG size of output: 7277 [2021-03-10 21:37:52,044 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 7271 DAG size of output: 6874 [2021-03-10 21:37:54,208 WARN L205 SmtUtils]: Spent 2.11 s on a formula simplification. DAG size of input: 6876 DAG size of output: 10248 [2021-03-10 21:37:55,856 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 6861 DAG size of output: 7667 [2021-03-10 21:37:56,410 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 3237 DAG size of output: 2344 [2021-03-10 21:37:56,737 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 2056 DAG size of output: 2047 [2021-03-10 21:37:57,189 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 2036 DAG size of output: 2036 [2021-03-10 21:37:57,695 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 1898 DAG size of output: 1481 [2021-03-10 21:37:58,676 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 970 DAG size of output: 1105 [2021-03-10 21:38:00,965 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1227 DAG size of output: 741 [2021-03-10 21:38:01,154 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 1792 DAG size of output: 1036 [2021-03-10 21:38:01,370 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 1994 DAG size of output: 1121 [2021-03-10 21:38:01,591 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 2083 DAG size of output: 1082 [2021-03-10 21:38:01,885 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 2408 DAG size of output: 1355 [2021-03-10 21:38:02,730 WARN L205 SmtUtils]: Spent 814.00 ms on a formula simplification. DAG size of input: 5449 DAG size of output: 3058 [2021-03-10 21:38:03,297 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 2758 DAG size of output: 2409 [2021-03-10 21:38:03,539 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 1524 DAG size of output: 1459 [2021-03-10 21:38:03,738 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 1447 DAG size of output: 1419 [2021-03-10 21:38:03,878 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 963 DAG size of output: 961 [2021-03-10 21:38:04,040 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 782 DAG size of output: 782 [2021-03-10 21:38:05,409 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1653 DAG size of output: 616 [2021-03-10 21:38:05,525 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1663 DAG size of output: 563 [2021-03-10 21:38:05,752 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 1385 DAG size of output: 1382 [2021-03-10 21:38:06,021 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 1370 DAG size of output: 1369 [2021-03-10 21:38:06,279 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 1108 DAG size of output: 1114 [2021-03-10 21:38:06,429 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 788 [2021-03-10 21:38:08,079 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 729 [2021-03-10 21:38:08,230 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 914 DAG size of output: 912 [2021-03-10 21:38:10,042 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 1327 DAG size of output: 855 [2021-03-10 21:38:10,274 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 1954 DAG size of output: 1259 [2021-03-10 21:38:11,047 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 2287 DAG size of output: 1503 [2021-03-10 21:38:11,577 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 2414 DAG size of output: 1590 [2021-03-10 21:38:12,070 WARN L205 SmtUtils]: Spent 481.00 ms on a formula simplification. DAG size of input: 3775 DAG size of output: 1957 [2021-03-10 21:38:12,595 WARN L205 SmtUtils]: Spent 483.00 ms on a formula simplification. DAG size of input: 4108 DAG size of output: 2247 [2021-03-10 21:38:13,381 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 5923 DAG size of output: 3169 [2021-03-10 21:38:14,647 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 5545 DAG size of output: 5861 [2021-03-10 21:38:15,322 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 4769 DAG size of output: 2712 [2021-03-10 21:38:15,791 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 2453 DAG size of output: 2435 [2021-03-10 21:38:16,226 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 2424 DAG size of output: 2022 [2021-03-10 21:38:16,404 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 1196 [2021-03-10 21:38:16,767 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 983 DAG size of output: 983 [2021-03-10 21:38:19,013 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1355 DAG size of output: 843 [2021-03-10 21:38:19,195 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1602 DAG size of output: 1013 [2021-03-10 21:38:19,439 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 1321 DAG size of output: 1130 [2021-03-10 21:38:21,343 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 2819 DAG size of output: 1430 [2021-03-10 21:38:22,267 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 3088 DAG size of output: 1464 [2021-03-10 21:38:22,642 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 3371 DAG size of output: 1700 [2021-03-10 21:38:22,996 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 2343 DAG size of output: 1675 [2021-03-10 21:38:23,327 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 1425 DAG size of output: 1418 [2021-03-10 21:38:23,559 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 1409 DAG size of output: 1275 [2021-03-10 21:38:23,893 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 686 DAG size of output: 740 [2021-03-10 21:38:25,842 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1097 DAG size of output: 737 [2021-03-10 21:38:25,964 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1182 DAG size of output: 785 [2021-03-10 21:38:26,131 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 865 DAG size of output: 596 [2021-03-10 21:38:27,067 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 1773 DAG size of output: 1064 [2021-03-10 21:38:27,540 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 1915 DAG size of output: 1066 [2021-03-10 21:38:27,777 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 2195 DAG size of output: 1308 [2021-03-10 21:38:28,414 WARN L205 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 4788 DAG size of output: 2444 [2021-03-10 21:38:29,776 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 9026 DAG size of output: 4498 [2021-03-10 21:38:31,202 WARN L205 SmtUtils]: Spent 1.38 s on a formula simplification. DAG size of input: 9026 DAG size of output: 4498 [2021-03-10 21:38:33,095 WARN L205 SmtUtils]: Spent 1.83 s on a formula simplification. DAG size of input: 9035 DAG size of output: 4170 [2021-03-10 21:38:33,534 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 2670 DAG size of output: 2159 [2021-03-10 21:38:33,686 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 577 DAG size of output: 680 [2021-03-10 21:38:35,001 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 2197 DAG size of output: 871 [2021-03-10 21:38:35,223 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 1840 DAG size of output: 1265 [2021-03-10 21:38:37,428 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 1631 DAG size of output: 806 [2021-03-10 21:38:37,767 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 3576 DAG size of output: 1470 [2021-03-10 21:38:38,158 WARN L205 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 3576 DAG size of output: 1470 [2021-03-10 21:38:38,518 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 3584 DAG size of output: 1478 [2021-03-10 21:38:38,730 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 1480 DAG size of output: 1083 [2021-03-10 21:38:39,133 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 1023 DAG size of output: 1130 [2021-03-10 21:38:39,258 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 963 [2021-03-10 21:38:41,335 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1881 DAG size of output: 733 [2021-03-10 21:38:41,459 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 2073 DAG size of output: 802 [2021-03-10 21:38:41,588 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 2073 DAG size of output: 802 [2021-03-10 21:38:41,727 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 2077 DAG size of output: 806 [2021-03-10 21:38:42,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:38:42,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:42,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:38:42,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-03-10 21:38:42,713 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:38:42,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:38:42,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-03-10 21:38:42,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488002600] [2021-03-10 21:38:42,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:38:42,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:38:42,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:38:42,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:38:42,714 INFO L87 Difference]: Start difference. First operand 14324 states and 46395 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:43,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:38:43,307 INFO L93 Difference]: Finished difference Result 14853 states and 47825 transitions. [2021-03-10 21:38:43,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:38:43,308 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:38:43,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:38:43,330 INFO L225 Difference]: With dead ends: 14853 [2021-03-10 21:38:43,330 INFO L226 Difference]: Without dead ends: 14850 [2021-03-10 21:38:43,330 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 356.1ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:38:43,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14850 states. [2021-03-10 21:38:43,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14850 to 14602. [2021-03-10 21:38:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14602 states, 14601 states have (on average 3.2490925279090472) internal successors, (47440), 14601 states have internal predecessors, (47440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:43,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14602 states to 14602 states and 47440 transitions. [2021-03-10 21:38:43,528 INFO L78 Accepts]: Start accepts. Automaton has 14602 states and 47440 transitions. Word has length 24 [2021-03-10 21:38:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:38:43,528 INFO L480 AbstractCegarLoop]: Abstraction has 14602 states and 47440 transitions. [2021-03-10 21:38:43,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:38:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 14602 states and 47440 transitions. [2021-03-10 21:38:43,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:38:43,539 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:38:43,539 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:38:43,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74734 [2021-03-10 21:38:43,741 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:38:43,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:38:43,741 INFO L82 PathProgramCache]: Analyzing trace with hash -168024840, now seen corresponding path program 238 times [2021-03-10 21:38:43,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:38:43,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899288021] [2021-03-10 21:38:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:38:43,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:38:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:38:43,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899288021] [2021-03-10 21:38:43,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255037769] [2021-03-10 21:38:43,834 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:38:43,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:38:43,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:38:43,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:38:43,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:38:44,500 WARN L205 SmtUtils]: Spent 340.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-03-10 21:38:44,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:38:44,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-03-10 21:38:48,392 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 1022 DAG size of output: 887 [2021-03-10 21:38:48,537 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1074 DAG size of output: 930 [2021-03-10 21:38:48,989 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 1223 DAG size of output: 1113 [2021-03-10 21:38:49,173 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 1238 DAG size of output: 1123 [2021-03-10 21:38:51,224 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 784 DAG size of output: 549 [2021-03-10 21:38:51,339 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1334 DAG size of output: 900 [2021-03-10 21:38:51,466 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 1348 DAG size of output: 903 [2021-03-10 21:38:53,557 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 740 DAG size of output: 484 [2021-03-10 21:38:53,680 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1313 DAG size of output: 894 [2021-03-10 21:38:53,929 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 2141 DAG size of output: 1428 [2021-03-10 21:38:54,376 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 3034 DAG size of output: 2306 [2021-03-10 21:38:56,557 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1245 DAG size of output: 1068 [2021-03-10 21:38:57,852 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 367 DAG size of output: 360 [2021-03-10 21:38:58,402 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1037 DAG size of output: 895 [2021-03-10 21:38:58,529 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 1054 DAG size of output: 910 [2021-03-10 21:38:58,802 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 1846 DAG size of output: 1524 [2021-03-10 21:38:59,319 WARN L205 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 2036 DAG size of output: 1737 [2021-03-10 21:38:59,649 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 2052 DAG size of output: 1747 [2021-03-10 21:39:02,294 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 1246 DAG size of output: 1043 [2021-03-10 21:39:02,445 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1247 DAG size of output: 1044 [2021-03-10 21:39:02,616 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 1414 DAG size of output: 1189 [2021-03-10 21:39:05,219 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 1642 DAG size of output: 1409 [2021-03-10 21:39:05,564 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 2432 DAG size of output: 2089 [2021-03-10 21:39:05,943 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 2444 DAG size of output: 2089 [2021-03-10 21:39:06,719 WARN L205 SmtUtils]: Spent 762.00 ms on a formula simplification. DAG size of input: 4052 DAG size of output: 3368 [2021-03-10 21:39:07,826 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 6391 DAG size of output: 4999 [2021-03-10 21:39:09,063 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 6405 DAG size of output: 5013 [2021-03-10 21:39:11,045 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1551 DAG size of output: 1137 [2021-03-10 21:39:11,190 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1564 DAG size of output: 1140 [2021-03-10 21:39:12,602 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 7776 DAG size of output: 5926 [2021-03-10 21:39:14,030 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 7920 DAG size of output: 6050 [2021-03-10 21:39:15,584 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 7957 DAG size of output: 6078 [2021-03-10 21:39:17,137 WARN L205 SmtUtils]: Spent 1.51 s on a formula simplification. DAG size of input: 7957 DAG size of output: 6078 [2021-03-10 21:39:18,743 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 7966 DAG size of output: 6087 [2021-03-10 21:39:20,693 WARN L205 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 6089 DAG size of output: 7835 [2021-03-10 21:39:22,229 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 5941 DAG size of output: 6386 [2021-03-10 21:39:22,704 WARN L205 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 2927 DAG size of output: 2915 [2021-03-10 21:39:23,155 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 2886 DAG size of output: 2879 [2021-03-10 21:39:24,169 WARN L205 SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 2796 [2021-03-10 21:39:24,513 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 2332 DAG size of output: 2332 [2021-03-10 21:39:24,853 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification that was a NOOP. DAG size: 2320 [2021-03-10 21:39:25,050 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 1084 DAG size of output: 1299 [2021-03-10 21:39:25,181 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 1077 DAG size of output: 1076 [2021-03-10 21:39:25,309 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1071 DAG size of output: 1071 [2021-03-10 21:39:25,425 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 891 DAG size of output: 890 [2021-03-10 21:39:29,107 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1504 DAG size of output: 1038 [2021-03-10 21:39:29,260 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 1508 DAG size of output: 1044 [2021-03-10 21:39:29,434 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 1812 DAG size of output: 1226 [2021-03-10 21:39:29,625 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 1515 DAG size of output: 1514 [2021-03-10 21:39:29,814 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 1507 DAG size of output: 1507 [2021-03-10 21:39:31,729 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 930 DAG size of output: 895 [2021-03-10 21:39:31,986 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 1310 DAG size of output: 1539 [2021-03-10 21:39:32,158 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 1306 [2021-03-10 21:39:33,447 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 939 DAG size of output: 1098 [2021-03-10 21:39:35,357 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 2073 DAG size of output: 1483 [2021-03-10 21:39:35,580 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 2079 DAG size of output: 1486 [2021-03-10 21:39:35,998 WARN L205 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 3684 DAG size of output: 2496 [2021-03-10 21:39:36,440 WARN L205 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 3695 DAG size of output: 2506 [2021-03-10 21:39:36,963 WARN L205 SmtUtils]: Spent 505.00 ms on a formula simplification. DAG size of input: 4050 DAG size of output: 2602 [2021-03-10 21:39:37,479 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 4475 DAG size of output: 2654 [2021-03-10 21:39:38,258 WARN L205 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 4661 DAG size of output: 2691 [2021-03-10 21:39:39,057 WARN L205 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 8030 DAG size of output: 3623 [2021-03-10 21:39:40,256 WARN L205 SmtUtils]: Spent 1.16 s on a formula simplification. DAG size of input: 10263 DAG size of output: 5733 [2021-03-10 21:39:41,493 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 10263 DAG size of output: 5733 [2021-03-10 21:39:42,785 WARN L205 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 10269 DAG size of output: 5739 [2021-03-10 21:39:43,664 WARN L205 SmtUtils]: Spent 858.00 ms on a formula simplification. DAG size of input: 5734 DAG size of output: 5584 [2021-03-10 21:39:44,774 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 5586 DAG size of output: 5955 [2021-03-10 21:39:45,664 WARN L205 SmtUtils]: Spent 855.00 ms on a formula simplification. DAG size of input: 5286 DAG size of output: 5322 [2021-03-10 21:39:46,474 WARN L205 SmtUtils]: Spent 777.00 ms on a formula simplification. DAG size of input: 5042 DAG size of output: 4776 [2021-03-10 21:39:47,126 WARN L205 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 4757 DAG size of output: 4724 [2021-03-10 21:39:47,562 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 3174 [2021-03-10 21:39:47,925 WARN L205 SmtUtils]: Spent 354.00 ms on a formula simplification that was a NOOP. DAG size: 2248 [2021-03-10 21:39:48,261 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 2194 DAG size of output: 2194 [2021-03-10 21:39:48,576 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 2162 DAG size of output: 2162 [2021-03-10 21:39:48,917 WARN L205 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 2092 DAG size of output: 2092 [2021-03-10 21:39:49,192 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 2080 DAG size of output: 2080 [2021-03-10 21:39:49,363 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 958 DAG size of output: 1070 [2021-03-10 21:39:49,469 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 951 [2021-03-10 21:39:49,623 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 947 DAG size of output: 947 [2021-03-10 21:39:52,252 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 1066 DAG size of output: 1172 [2021-03-10 21:39:53,908 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1852 DAG size of output: 747 [2021-03-10 21:39:54,202 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 1694 DAG size of output: 1821 [2021-03-10 21:39:54,386 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 1686 DAG size of output: 1685 [2021-03-10 21:39:54,564 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 1673 DAG size of output: 1673 [2021-03-10 21:39:54,788 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 1624 DAG size of output: 1753 [2021-03-10 21:39:54,956 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 1615 [2021-03-10 21:39:55,076 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1170 DAG size of output: 1170 [2021-03-10 21:39:56,336 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 954 DAG size of output: 504 [2021-03-10 21:39:56,884 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 2849 DAG size of output: 1180 [2021-03-10 21:39:57,109 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 2910 DAG size of output: 1220 [2021-03-10 21:39:57,368 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 3147 DAG size of output: 1374 [2021-03-10 21:39:57,690 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 3852 DAG size of output: 1615 [2021-03-10 21:39:58,012 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 3852 DAG size of output: 1615 [2021-03-10 21:39:58,491 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 3860 DAG size of output: 1702 [2021-03-10 21:39:58,676 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 1608 DAG size of output: 1405 [2021-03-10 21:39:58,818 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 1407 DAG size of output: 1173 [2021-03-10 21:40:00,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:40:00,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:00,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:40:00,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-03-10 21:40:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:40:00,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:40:00,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-03-10 21:40:00,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226090242] [2021-03-10 21:40:00,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 21:40:00,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:40:00,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 21:40:00,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:40:00,542 INFO L87 Difference]: Start difference. First operand 14602 states and 47440 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:01,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:40:01,025 INFO L93 Difference]: Finished difference Result 15569 states and 50460 transitions. [2021-03-10 21:40:01,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:40:01,026 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:40:01,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:40:01,049 INFO L225 Difference]: With dead ends: 15569 [2021-03-10 21:40:01,050 INFO L226 Difference]: Without dead ends: 15566 [2021-03-10 21:40:01,050 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:40:01,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15566 states. [2021-03-10 21:40:01,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15566 to 15313. [2021-03-10 21:40:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15313 states, 15312 states have (on average 3.2700496342737724) internal successors, (50071), 15312 states have internal predecessors, (50071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15313 states to 15313 states and 50071 transitions. [2021-03-10 21:40:01,270 INFO L78 Accepts]: Start accepts. Automaton has 15313 states and 50071 transitions. Word has length 24 [2021-03-10 21:40:01,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:40:01,270 INFO L480 AbstractCegarLoop]: Abstraction has 15313 states and 50071 transitions. [2021-03-10 21:40:01,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:40:01,271 INFO L276 IsEmpty]: Start isEmpty. Operand 15313 states and 50071 transitions. [2021-03-10 21:40:01,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:40:01,282 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:40:01,282 INFO L519 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:40:01,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92693 [2021-03-10 21:40:01,483 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:40:01,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:40:01,484 INFO L82 PathProgramCache]: Analyzing trace with hash -657413120, now seen corresponding path program 239 times [2021-03-10 21:40:01,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:40:01,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468895961] [2021-03-10 21:40:01,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:40:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:40:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:40:01,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468895961] [2021-03-10 21:40:01,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722452363] [2021-03-10 21:40:01,579 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:01,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:40:01,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:40:01,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:40:01,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:40:02,267 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-03-10 21:40:02,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:40:02,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-03-10 21:40:04,472 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 622 DAG size of output: 696 Received shutdown request... [2021-03-10 21:40:06,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103305,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:40:06,147 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 21:40:06,151 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 21:40:06,151 INFO L202 PluginConnector]: Adding new model unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 09:40:06 BasicIcfg [2021-03-10 21:40:06,151 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 21:40:06,152 INFO L168 Benchmark]: Toolchain (without parser) took 858884.23 ms. Allocated memory was 255.9 MB in the beginning and 5.2 GB in the end (delta: 4.9 GB). Free memory was 236.6 MB in the beginning and 2.9 GB in the end (delta: -2.7 GB). Peak memory consumption was 3.5 GB. Max. memory is 16.0 GB. [2021-03-10 21:40:06,152 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 21:40:06,152 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.10 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:40:06,152 INFO L168 Benchmark]: Boogie Preprocessor took 17.03 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.7 MB in the end (delta: 956.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:40:06,152 INFO L168 Benchmark]: RCFGBuilder took 365.59 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 234.0 MB in the end (delta: -349.0 kB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. [2021-03-10 21:40:06,152 INFO L168 Benchmark]: TraceAbstraction took 858466.45 ms. Allocated memory was 255.9 MB in the beginning and 5.2 GB in the end (delta: 4.9 GB). Free memory was 233.9 MB in the beginning and 2.9 GB in the end (delta: -2.7 GB). Peak memory consumption was 3.5 GB. Max. memory is 16.0 GB. [2021-03-10 21:40:06,153 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 255.9 MB. Free memory is still 237.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.10 ms. Allocated memory is still 255.9 MB. Free memory was 236.1 MB in the beginning and 234.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.03 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.7 MB in the end (delta: 956.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 365.59 ms. Allocated memory is still 255.9 MB. Free memory was 233.7 MB in the beginning and 234.0 MB in the end (delta: -349.0 kB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 858466.45 ms. Allocated memory was 255.9 MB in the beginning and 5.2 GB in the end (delta: 4.9 GB). Free memory was 233.9 MB in the beginning and 2.9 GB in the end (delta: -2.7 GB). Peak memory consumption was 3.5 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 57). Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 12,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 858362.4ms, OverallIterations: 243, TraceHistogramMax: 12, EmptinessCheckTime: 843.1ms, AutomataDifference: 40104.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4788 SDtfs, 17010 SDslu, 35650 SDs, 0 SdLazy, 36558 SolverSat, 5288 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14230.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9143 GetRequests, 4262 SyntacticMatches, 109 SemanticMatches, 4772 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24187 ImplicationChecksByTransitivity, 30659.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=15313occurred in iteration=242, InterpolantAutomatonStates: 4374, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18715.3ms AutomataMinimizationTime, 242 MinimizatonAttempts, 92587 StatesRemovedByMinimization, 236 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 734.6ms SsaConstructionTime, 2552.6ms SatisfiabilityAnalysisTime, 738055.6ms InterpolantComputationTime, 9243 NumberOfCodeBlocks, 9242 NumberOfCodeBlocksAsserted, 1024 NumberOfCheckSat, 8762 ConstructedInterpolants, 0 QuantifiedInterpolants, 40840 SizeOfPredicates, 161 NumberOfNonLiveVariables, 18489 ConjunctsInSsa, 3256 ConjunctsInUnsatCore, 481 InterpolantComputations, 3 PerfectInterpolantSequences, 7507/20350 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