/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/simple-queue-L64.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 20:17:33,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 20:17:33,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 20:17:33,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 20:17:33,907 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 [2021-02-19 20:17:33,926 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 20:17:33,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 20:17:33,927 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 20:17:33,927 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 20:17:33,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 20:17:33,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 20:17:33,928 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 20:17:33,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 20:17:33,929 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 20:17:33,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 20:17:33,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 20:17:33,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 20:17:33,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 20:17:33,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 20:17:33,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 20:17:33,930 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 20:17:33,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 20:17:33,930 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 20:17:33,930 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 20:17:33,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 20:17:33,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 20:17:33,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 20:17:33,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 20:17:33,931 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 20:17:33,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 20:17:33,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 20:17:33,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 20:17:33,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 20:17:33,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 20:17:33,932 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 20:17:33,932 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 20:17:33,932 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 20:17:34,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 20:17:34,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 20:17:34,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 20:17:34,273 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 20:17:34,274 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 20:17:34,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/simple-queue-L64.wvr.bpl [2021-02-19 20:17:34,275 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/simple-queue-L64.wvr.bpl' [2021-02-19 20:17:34,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 20:17:34,517 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 20:17:34,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 20:17:34,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 20:17:34,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 20:17:34,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "simple-queue-L64.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:17:34" (1/1) ... [2021-02-19 20:17:34,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "simple-queue-L64.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:17:34" (1/1) ... [2021-02-19 20:17:34,544 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 20:17:34,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 20:17:34,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 20:17:34,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 20:17:34,554 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "simple-queue-L64.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:17:34" (1/1) ... [2021-02-19 20:17:34,554 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "simple-queue-L64.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:17:34" (1/1) ... [2021-02-19 20:17:34,555 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "simple-queue-L64.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:17:34" (1/1) ... [2021-02-19 20:17:34,555 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "simple-queue-L64.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:17:34" (1/1) ... [2021-02-19 20:17:34,558 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "simple-queue-L64.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:17:34" (1/1) ... [2021-02-19 20:17:34,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "simple-queue-L64.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:17:34" (1/1) ... [2021-02-19 20:17:34,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "simple-queue-L64.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:17:34" (1/1) ... [2021-02-19 20:17:34,563 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 20:17:34,564 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 20:17:34,564 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 20:17:34,564 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 20:17:34,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "simple-queue-L64.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:17:34" (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 [2021-02-19 20:17:34,651 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 20:17:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 20:17:34,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 20:17:34,652 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 20:17:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 20:17:34,652 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 20:17:34,653 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 20:17:34,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 20:17:34,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 20:17:34,654 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 20:17:34,839 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 20:17:34,839 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-19 20:17:34,840 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-02-19 20:17:34,840 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-02-19 20:17:34,841 INFO L202 PluginConnector]: Adding new model simple-queue-L64.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:17:34 BoogieIcfgContainer [2021-02-19 20:17:34,841 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 20:17:34,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 20:17:34,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 20:17:34,845 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 20:17:34,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue-L64.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 08:17:34" (1/2) ... [2021-02-19 20:17:34,846 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d7e898f and model type simple-queue-L64.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 08:17:34, skipping insertion in model container [2021-02-19 20:17:34,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "simple-queue-L64.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 08:17:34" (2/2) ... [2021-02-19 20:17:34,847 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-queue-L64.wvr.bpl [2021-02-19 20:17:34,857 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 20:17:34,857 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 20:17:34,861 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 20:17:34,861 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 20:17:34,904 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 20:17:34,914 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 20:17:34,927 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 20:17:34,927 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 20:17:34,927 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 20:17:34,927 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 20:17:34,928 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 20:17:34,928 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 20:17:34,928 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 20:17:34,928 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 20:17:34,935 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-02-19 20:17:34,942 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) [2021-02-19 20:17:34,944 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) [2021-02-19 20:17:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-02-19 20:17:34,948 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:34,949 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:34,949 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:34,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:34,953 INFO L82 PathProgramCache]: Analyzing trace with hash -2069523146, now seen corresponding path program 1 times [2021-02-19 20:17:34,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:34,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026642227] [2021-02-19 20:17:34,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:35,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026642227] [2021-02-19 20:17:35,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:17:35,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 20:17:35,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908042000] [2021-02-19 20:17:35,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 20:17:35,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:35,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 20:17:35,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:17:35,123 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) [2021-02-19 20:17:35,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:35,146 INFO L93 Difference]: Finished difference Result 20 states and 34 transitions. [2021-02-19 20:17:35,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 20:17:35,163 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 [2021-02-19 20:17:35,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:35,169 INFO L225 Difference]: With dead ends: 20 [2021-02-19 20:17:35,169 INFO L226 Difference]: Without dead ends: 16 [2021-02-19 20:17:35,170 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:17:35,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-02-19 20:17:35,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-02-19 20:17:35,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:35,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 27 transitions. [2021-02-19 20:17:35,231 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 27 transitions. Word has length 9 [2021-02-19 20:17:35,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:35,231 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 27 transitions. [2021-02-19 20:17:35,231 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) [2021-02-19 20:17:35,232 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 27 transitions. [2021-02-19 20:17:35,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-02-19 20:17:35,232 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:35,232 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:35,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 20:17:35,233 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:35,233 INFO L82 PathProgramCache]: Analyzing trace with hash 292362645, now seen corresponding path program 1 times [2021-02-19 20:17:35,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:35,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350927260] [2021-02-19 20:17:35,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:35,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350927260] [2021-02-19 20:17:35,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 20:17:35,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-02-19 20:17:35,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47797172] [2021-02-19 20:17:35,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 20:17:35,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:35,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 20:17:35,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:17:35,277 INFO L87 Difference]: Start difference. First operand 16 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:35,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:35,290 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2021-02-19 20:17:35,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 20:17:35,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-02-19 20:17:35,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:35,307 INFO L225 Difference]: With dead ends: 21 [2021-02-19 20:17:35,307 INFO L226 Difference]: Without dead ends: 18 [2021-02-19 20:17:35,308 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 20:17:35,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-02-19 20:17:35,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-02-19 20:17:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:35,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 30 transitions. [2021-02-19 20:17:35,311 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 30 transitions. Word has length 10 [2021-02-19 20:17:35,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:35,311 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 30 transitions. [2021-02-19 20:17:35,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:35,311 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 30 transitions. [2021-02-19 20:17:35,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-19 20:17:35,312 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:35,312 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:35,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 20:17:35,312 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:35,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:35,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1370799358, now seen corresponding path program 1 times [2021-02-19 20:17:35,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:35,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516176328] [2021-02-19 20:17:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:35,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516176328] [2021-02-19 20:17:35,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856799573] [2021-02-19 20:17:35,391 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 [2021-02-19 20:17:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:35,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 20:17:35,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:35,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:17:35,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:35,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:35,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:35,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:17:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:35,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:35,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-02-19 20:17:35,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583958140] [2021-02-19 20:17:35,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:17:35,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:35,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:17:35,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:17:35,585 INFO L87 Difference]: Start difference. First operand 18 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:35,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:35,616 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2021-02-19 20:17:35,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:17:35,616 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-02-19 20:17:35,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:35,617 INFO L225 Difference]: With dead ends: 25 [2021-02-19 20:17:35,617 INFO L226 Difference]: Without dead ends: 21 [2021-02-19 20:17:35,617 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:17:35,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-02-19 20:17:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-02-19 20:17:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:35,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2021-02-19 20:17:35,622 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2021-02-19 20:17:35,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:35,622 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2021-02-19 20:17:35,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:35,622 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2021-02-19 20:17:35,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-02-19 20:17:35,623 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:35,623 INFO L506 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:35,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-19 20:17:35,825 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:35,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:35,825 INFO L82 PathProgramCache]: Analyzing trace with hash 477963593, now seen corresponding path program 2 times [2021-02-19 20:17:35,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:35,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179160956] [2021-02-19 20:17:35,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:35,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179160956] [2021-02-19 20:17:35,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838817033] [2021-02-19 20:17:35,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:17:35,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:17:35,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:35,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2021-02-19 20:17:35,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:36,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:36,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2021-02-19 20:17:36,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677319442] [2021-02-19 20:17:36,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 20:17:36,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:36,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 20:17:36,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:17:36,008 INFO L87 Difference]: Start difference. First operand 21 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:36,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:36,019 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2021-02-19 20:17:36,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 20:17:36,020 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 [2021-02-19 20:17:36,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:36,021 INFO L225 Difference]: With dead ends: 50 [2021-02-19 20:17:36,021 INFO L226 Difference]: Without dead ends: 45 [2021-02-19 20:17:36,022 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 20:17:36,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-02-19 20:17:36,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-02-19 20:17:36,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:36,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-02-19 20:17:36,028 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-02-19 20:17:36,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:36,028 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-02-19 20:17:36,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:36,028 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-02-19 20:17:36,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-19 20:17:36,029 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:36,029 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:36,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:36,250 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:36,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:36,251 INFO L82 PathProgramCache]: Analyzing trace with hash -92887178, now seen corresponding path program 3 times [2021-02-19 20:17:36,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:36,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605745594] [2021-02-19 20:17:36,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:36,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:36,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605745594] [2021-02-19 20:17:36,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886372679] [2021-02-19 20:17:36,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:36,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 20:17:36,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:36,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 20:17:36,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:36,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:17:36,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:36,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:36,478 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:36,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:17:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:36,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:36,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-02-19 20:17:36,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150473338] [2021-02-19 20:17:36,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 20:17:36,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:36,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 20:17:36,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-19 20:17:36,493 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:36,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:36,582 INFO L93 Difference]: Finished difference Result 65 states and 115 transitions. [2021-02-19 20:17:36,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 20:17:36,582 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-02-19 20:17:36,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:36,584 INFO L225 Difference]: With dead ends: 65 [2021-02-19 20:17:36,584 INFO L226 Difference]: Without dead ends: 39 [2021-02-19 20:17:36,584 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:17:36,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-02-19 20:17:36,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-02-19 20:17:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:36,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-02-19 20:17:36,589 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 13 [2021-02-19 20:17:36,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:36,589 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-02-19 20:17:36,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:36,589 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-02-19 20:17:36,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-19 20:17:36,590 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:36,590 INFO L506 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:36,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:36,812 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:36,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:36,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1438535509, now seen corresponding path program 4 times [2021-02-19 20:17:36,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:36,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260638298] [2021-02-19 20:17:36,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:36,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260638298] [2021-02-19 20:17:36,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039800830] [2021-02-19 20:17:36,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:36,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:17:36,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:36,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 20:17:36,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:36,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:36,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 20:17:36,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38484548] [2021-02-19 20:17:36,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 20:17:36,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:36,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 20:17:36,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:17:36,923 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-02-19 20:17:36,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:36,938 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2021-02-19 20:17:36,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 20:17:36,941 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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 14 [2021-02-19 20:17:36,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:36,941 INFO L225 Difference]: With dead ends: 73 [2021-02-19 20:17:36,941 INFO L226 Difference]: Without dead ends: 66 [2021-02-19 20:17:36,942 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-02-19 20:17:36,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-02-19 20:17:36,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-02-19 20:17:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2021-02-19 20:17:36,958 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2021-02-19 20:17:36,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:36,959 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2021-02-19 20:17:36,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-02-19 20:17:36,959 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2021-02-19 20:17:36,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 20:17:36,959 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:36,960 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:37,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:37,174 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:37,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:37,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1688208830, now seen corresponding path program 5 times [2021-02-19 20:17:37,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:37,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128772099] [2021-02-19 20:17:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:37,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:37,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128772099] [2021-02-19 20:17:37,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955724229] [2021-02-19 20:17:37,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:37,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 20:17:37,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:37,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:17:37,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:37,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:37,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:17:37,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:37,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:37,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:37,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-02-19 20:17:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:37,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:37,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-02-19 20:17:37,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558493899] [2021-02-19 20:17:37,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 20:17:37,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:37,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 20:17:37,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:17:37,508 INFO L87 Difference]: Start difference. First operand 48 states and 95 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) [2021-02-19 20:17:37,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:37,878 INFO L93 Difference]: Finished difference Result 229 states and 428 transitions. [2021-02-19 20:17:37,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 20:17:37,878 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 15 [2021-02-19 20:17:37,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:37,879 INFO L225 Difference]: With dead ends: 229 [2021-02-19 20:17:37,880 INFO L226 Difference]: Without dead ends: 116 [2021-02-19 20:17:37,880 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:17:37,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-02-19 20:17:37,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 56. [2021-02-19 20:17:37,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:37,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 113 transitions. [2021-02-19 20:17:37,887 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 113 transitions. Word has length 15 [2021-02-19 20:17:37,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:37,887 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 113 transitions. [2021-02-19 20:17:37,887 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) [2021-02-19 20:17:37,887 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 113 transitions. [2021-02-19 20:17:37,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 20:17:37,888 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:37,888 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:38,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-02-19 20:17:38,109 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:38,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:38,110 INFO L82 PathProgramCache]: Analyzing trace with hash 904001974, now seen corresponding path program 6 times [2021-02-19 20:17:38,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:38,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241985453] [2021-02-19 20:17:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:38,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241985453] [2021-02-19 20:17:38,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648548046] [2021-02-19 20:17:38,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:38,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 20:17:38,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:38,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 20:17:38,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:38,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:17:38,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:38,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:38,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:38,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:17:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:38,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:38,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-02-19 20:17:38,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623262268] [2021-02-19 20:17:38,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 20:17:38,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:38,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 20:17:38,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-02-19 20:17:38,352 INFO L87 Difference]: Start difference. First operand 56 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:38,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:38,543 INFO L93 Difference]: Finished difference Result 121 states and 226 transitions. [2021-02-19 20:17:38,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:17:38,544 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-02-19 20:17:38,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:38,544 INFO L225 Difference]: With dead ends: 121 [2021-02-19 20:17:38,544 INFO L226 Difference]: Without dead ends: 77 [2021-02-19 20:17:38,545 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-02-19 20:17:38,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-02-19 20:17:38,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 36. [2021-02-19 20:17:38,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-02-19 20:17:38,560 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 17 [2021-02-19 20:17:38,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:38,560 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-02-19 20:17:38,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:38,560 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-02-19 20:17:38,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-19 20:17:38,561 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:38,561 INFO L506 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:38,778 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:38,778 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:38,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:38,779 INFO L82 PathProgramCache]: Analyzing trace with hash -2017639147, now seen corresponding path program 7 times [2021-02-19 20:17:38,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:38,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033018890] [2021-02-19 20:17:38,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:38,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:38,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033018890] [2021-02-19 20:17:38,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471314204] [2021-02-19 20:17:38,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 20:17:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:38,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 20:17:38,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:38,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:38,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 20:17:38,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105675917] [2021-02-19 20:17:38,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 20:17:38,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:38,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 20:17:38,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:17:38,943 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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) [2021-02-19 20:17:38,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:38,961 INFO L93 Difference]: Finished difference Result 128 states and 229 transitions. [2021-02-19 20:17:38,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 20:17:38,962 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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 18 [2021-02-19 20:17:38,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:38,962 INFO L225 Difference]: With dead ends: 128 [2021-02-19 20:17:38,962 INFO L226 Difference]: Without dead ends: 117 [2021-02-19 20:17:38,963 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-02-19 20:17:38,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-02-19 20:17:38,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2021-02-19 20:17:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:38,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2021-02-19 20:17:38,968 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2021-02-19 20:17:38,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:38,968 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2021-02-19 20:17:38,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 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) [2021-02-19 20:17:38,968 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2021-02-19 20:17:38,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 20:17:38,969 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:38,969 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:39,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:39,190 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:39,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2105913730, now seen corresponding path program 8 times [2021-02-19 20:17:39,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:39,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278048255] [2021-02-19 20:17:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:39,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278048255] [2021-02-19 20:17:39,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262150307] [2021-02-19 20:17:39,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:39,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:17:39,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:39,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 20:17:39,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:39,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:17:39,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:39,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:39,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:39,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:17:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:39,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:39,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-02-19 20:17:39,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242625546] [2021-02-19 20:17:39,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 20:17:39,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:39,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 20:17:39,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-02-19 20:17:39,412 INFO L87 Difference]: Start difference. First operand 87 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:39,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:39,624 INFO L93 Difference]: Finished difference Result 179 states and 337 transitions. [2021-02-19 20:17:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 20:17:39,624 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 20:17:39,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:39,625 INFO L225 Difference]: With dead ends: 179 [2021-02-19 20:17:39,625 INFO L226 Difference]: Without dead ends: 105 [2021-02-19 20:17:39,626 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:17:39,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-02-19 20:17:39,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2021-02-19 20:17:39,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:39,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-02-19 20:17:39,635 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 19 [2021-02-19 20:17:39,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:39,636 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-02-19 20:17:39,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:39,636 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-02-19 20:17:39,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-19 20:17:39,638 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:39,638 INFO L506 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:39,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 20:17:39,859 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:39,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:39,860 INFO L82 PathProgramCache]: Analyzing trace with hash 881886921, now seen corresponding path program 9 times [2021-02-19 20:17:39,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:39,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743611647] [2021-02-19 20:17:39,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:39,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743611647] [2021-02-19 20:17:39,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246256634] [2021-02-19 20:17:39,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:39,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 20:17:39,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:39,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 20:17:39,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:40,012 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:40,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:40,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 20:17:40,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245641974] [2021-02-19 20:17:40,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 20:17:40,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:40,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 20:17:40,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:17:40,014 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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) [2021-02-19 20:17:40,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:40,037 INFO L93 Difference]: Finished difference Result 160 states and 290 transitions. [2021-02-19 20:17:40,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 20:17:40,037 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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 [2021-02-19 20:17:40,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:40,039 INFO L225 Difference]: With dead ends: 160 [2021-02-19 20:17:40,039 INFO L226 Difference]: Without dead ends: 147 [2021-02-19 20:17:40,040 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-02-19 20:17:40,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-02-19 20:17:40,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-02-19 20:17:40,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-02-19 20:17:40,044 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 20 [2021-02-19 20:17:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:40,045 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-02-19 20:17:40,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 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) [2021-02-19 20:17:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-02-19 20:17:40,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 20:17:40,045 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:40,045 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:40,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:40,264 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:40,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:40,265 INFO L82 PathProgramCache]: Analyzing trace with hash -638612490, now seen corresponding path program 10 times [2021-02-19 20:17:40,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:40,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867260843] [2021-02-19 20:17:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:40,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867260843] [2021-02-19 20:17:40,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410479588] [2021-02-19 20:17:40,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:40,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:17:40,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:40,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 20:17:40,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:40,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:17:40,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:40,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:40,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:40,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:17:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:40,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:40,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-02-19 20:17:40,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626969935] [2021-02-19 20:17:40,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 20:17:40,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:40,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 20:17:40,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-02-19 20:17:40,536 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:40,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:40,819 INFO L93 Difference]: Finished difference Result 229 states and 435 transitions. [2021-02-19 20:17:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 20:17:40,820 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 20:17:40,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:40,820 INFO L225 Difference]: With dead ends: 229 [2021-02-19 20:17:40,821 INFO L226 Difference]: Without dead ends: 135 [2021-02-19 20:17:40,821 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-02-19 20:17:40,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-02-19 20:17:40,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2021-02-19 20:17:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:40,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 86 transitions. [2021-02-19 20:17:40,826 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 86 transitions. Word has length 21 [2021-02-19 20:17:40,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:40,826 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 86 transitions. [2021-02-19 20:17:40,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:40,826 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 86 transitions. [2021-02-19 20:17:40,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 20:17:40,830 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:40,831 INFO L506 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:41,045 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:41,045 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:41,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:41,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1700920021, now seen corresponding path program 11 times [2021-02-19 20:17:41,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:41,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187994734] [2021-02-19 20:17:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:41,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187994734] [2021-02-19 20:17:41,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872957996] [2021-02-19 20:17:41,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:41,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 20:17:41,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:41,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 20:17:41,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:41,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:41,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 20:17:41,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352620411] [2021-02-19 20:17:41,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-19 20:17:41,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:41,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-19 20:17:41,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:17:41,226 INFO L87 Difference]: Start difference. First operand 46 states and 86 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2021-02-19 20:17:41,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:41,246 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2021-02-19 20:17:41,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-19 20:17:41,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 22 [2021-02-19 20:17:41,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:41,247 INFO L225 Difference]: With dead ends: 195 [2021-02-19 20:17:41,248 INFO L226 Difference]: Without dead ends: 180 [2021-02-19 20:17:41,248 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-02-19 20:17:41,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-02-19 20:17:41,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2021-02-19 20:17:41,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0948905109489053) internal successors, (287), 137 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:41,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 287 transitions. [2021-02-19 20:17:41,258 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 287 transitions. Word has length 22 [2021-02-19 20:17:41,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:41,258 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 287 transitions. [2021-02-19 20:17:41,258 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2021-02-19 20:17:41,258 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 287 transitions. [2021-02-19 20:17:41,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 20:17:41,259 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:41,259 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:41,474 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-02-19 20:17:41,474 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:41,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:41,474 INFO L82 PathProgramCache]: Analyzing trace with hash 789866690, now seen corresponding path program 12 times [2021-02-19 20:17:41,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:41,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100200356] [2021-02-19 20:17:41,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:41,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100200356] [2021-02-19 20:17:41,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944062228] [2021-02-19 20:17:41,675 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:41,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 20:17:41,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:41,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:17:41,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:42,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:42,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:17:42,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:42,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:42,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:42,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-02-19 20:17:42,225 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:42,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:42,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 20:17:42,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391951393] [2021-02-19 20:17:42,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:17:42,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:42,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:17:42,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:17:42,227 INFO L87 Difference]: Start difference. First operand 138 states and 287 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:43,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:43,827 INFO L93 Difference]: Finished difference Result 869 states and 1674 transitions. [2021-02-19 20:17:43,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 20:17:43,827 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 20:17:43,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:43,829 INFO L225 Difference]: With dead ends: 869 [2021-02-19 20:17:43,829 INFO L226 Difference]: Without dead ends: 472 [2021-02-19 20:17:43,831 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1224, Invalid=5256, Unknown=0, NotChecked=0, Total=6480 [2021-02-19 20:17:43,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-02-19 20:17:43,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 150. [2021-02-19 20:17:43,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1006711409395975) internal successors, (313), 149 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:43,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 313 transitions. [2021-02-19 20:17:43,838 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 313 transitions. Word has length 23 [2021-02-19 20:17:43,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:43,838 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 313 transitions. [2021-02-19 20:17:43,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:43,838 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 313 transitions. [2021-02-19 20:17:43,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 20:17:43,841 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:43,841 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:44,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-02-19 20:17:44,062 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:44,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:44,063 INFO L82 PathProgramCache]: Analyzing trace with hash -609788362, now seen corresponding path program 13 times [2021-02-19 20:17:44,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:44,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090116001] [2021-02-19 20:17:44,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:44,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090116001] [2021-02-19 20:17:44,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599427161] [2021-02-19 20:17:44,276 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:44,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:44,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 20:17:44,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:44,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:17:44,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:44,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:44,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:44,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:17:44,370 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:44,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:44,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-02-19 20:17:44,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366512466] [2021-02-19 20:17:44,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 20:17:44,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:44,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 20:17:44,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-02-19 20:17:44,371 INFO L87 Difference]: Start difference. First operand 150 states and 313 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:44,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:44,793 INFO L93 Difference]: Finished difference Result 325 states and 626 transitions. [2021-02-19 20:17:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 20:17:44,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 20:17:44,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:44,795 INFO L225 Difference]: With dead ends: 325 [2021-02-19 20:17:44,795 INFO L226 Difference]: Without dead ends: 205 [2021-02-19 20:17:44,795 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:17:44,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-02-19 20:17:44,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 56. [2021-02-19 20:17:44,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:44,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 106 transitions. [2021-02-19 20:17:44,798 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 106 transitions. Word has length 25 [2021-02-19 20:17:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:44,799 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 106 transitions. [2021-02-19 20:17:44,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:44,799 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 106 transitions. [2021-02-19 20:17:44,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 20:17:44,800 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:44,800 INFO L506 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:45,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 20:17:45,013 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:45,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:45,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1700499307, now seen corresponding path program 14 times [2021-02-19 20:17:45,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:45,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292422784] [2021-02-19 20:17:45,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:45,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292422784] [2021-02-19 20:17:45,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887024950] [2021-02-19 20:17:45,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:45,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:17:45,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:45,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 20:17:45,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:45,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:45,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 20:17:45,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124893821] [2021-02-19 20:17:45,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 20:17:45,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:45,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 20:17:45,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:17:45,234 INFO L87 Difference]: Start difference. First operand 56 states and 106 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:45,260 INFO L93 Difference]: Finished difference Result 274 states and 509 transitions. [2021-02-19 20:17:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 20:17:45,261 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-02-19 20:17:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:45,262 INFO L225 Difference]: With dead ends: 274 [2021-02-19 20:17:45,262 INFO L226 Difference]: Without dead ends: 255 [2021-02-19 20:17:45,262 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-02-19 20:17:45,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-02-19 20:17:45,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-02-19 20:17:45,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.095) internal successors, (419), 200 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:45,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 419 transitions. [2021-02-19 20:17:45,269 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 419 transitions. Word has length 26 [2021-02-19 20:17:45,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:45,269 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 419 transitions. [2021-02-19 20:17:45,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:45,269 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 419 transitions. [2021-02-19 20:17:45,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 20:17:45,270 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:45,270 INFO L506 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:45,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:45,482 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:45,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:45,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1214521346, now seen corresponding path program 15 times [2021-02-19 20:17:45,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:45,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009270686] [2021-02-19 20:17:45,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:45,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009270686] [2021-02-19 20:17:45,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448067530] [2021-02-19 20:17:45,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:45,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 20:17:45,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:45,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 20:17:45,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:45,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:17:45,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:45,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:45,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:45,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:17:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:45,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:45,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-02-19 20:17:45,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548182458] [2021-02-19 20:17:45,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 20:17:45,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:45,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 20:17:45,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:17:45,856 INFO L87 Difference]: Start difference. First operand 201 states and 419 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:46,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:46,471 INFO L93 Difference]: Finished difference Result 415 states and 801 transitions. [2021-02-19 20:17:46,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 20:17:46,472 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 20:17:46,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:46,474 INFO L225 Difference]: With dead ends: 415 [2021-02-19 20:17:46,474 INFO L226 Difference]: Without dead ends: 249 [2021-02-19 20:17:46,475 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 20:17:46,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-02-19 20:17:46,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 61. [2021-02-19 20:17:46,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-02-19 20:17:46,478 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 27 [2021-02-19 20:17:46,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:46,478 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-02-19 20:17:46,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:46,478 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-02-19 20:17:46,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-02-19 20:17:46,478 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:46,479 INFO L506 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:46,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 20:17:46,686 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:46,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:46,687 INFO L82 PathProgramCache]: Analyzing trace with hash -981473207, now seen corresponding path program 16 times [2021-02-19 20:17:46,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:46,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113324701] [2021-02-19 20:17:46,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:46,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113324701] [2021-02-19 20:17:46,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899417753] [2021-02-19 20:17:46,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:46,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:17:46,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:46,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 20:17:46,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:46,905 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:46,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:46,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 20:17:46,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161703640] [2021-02-19 20:17:46,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 20:17:46,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:46,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 20:17:46,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-02-19 20:17:46,906 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-02-19 20:17:46,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:46,944 INFO L93 Difference]: Finished difference Result 318 states and 594 transitions. [2021-02-19 20:17:46,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 20:17:46,944 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) Word has length 28 [2021-02-19 20:17:46,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:46,945 INFO L225 Difference]: With dead ends: 318 [2021-02-19 20:17:46,945 INFO L226 Difference]: Without dead ends: 297 [2021-02-19 20:17:46,946 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-02-19 20:17:46,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-02-19 20:17:46,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 237. [2021-02-19 20:17:46,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.093220338983051) internal successors, (494), 236 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:46,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 494 transitions. [2021-02-19 20:17:46,951 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 494 transitions. Word has length 28 [2021-02-19 20:17:46,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:46,952 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 494 transitions. [2021-02-19 20:17:46,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-02-19 20:17:46,952 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 494 transitions. [2021-02-19 20:17:46,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 20:17:46,952 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:46,952 INFO L506 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:47,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 20:17:47,174 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:47,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:47,174 INFO L82 PathProgramCache]: Analyzing trace with hash 34697334, now seen corresponding path program 17 times [2021-02-19 20:17:47,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:47,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559010996] [2021-02-19 20:17:47,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:47,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559010996] [2021-02-19 20:17:47,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468435787] [2021-02-19 20:17:47,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:47,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 20:17:47,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:47,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 20:17:47,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:48,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:48,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:17:48,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:48,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:48,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:48,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-02-19 20:17:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:48,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:48,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-02-19 20:17:48,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656804689] [2021-02-19 20:17:48,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-02-19 20:17:48,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:48,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-02-19 20:17:48,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 20:17:48,350 INFO L87 Difference]: Start difference. First operand 237 states and 494 transitions. Second operand has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:52,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:52,096 INFO L93 Difference]: Finished difference Result 1727 states and 3354 transitions. [2021-02-19 20:17:52,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-02-19 20:17:52,096 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 20:17:52,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:52,101 INFO L225 Difference]: With dead ends: 1727 [2021-02-19 20:17:52,101 INFO L226 Difference]: Without dead ends: 1012 [2021-02-19 20:17:52,104 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4325 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2986, Invalid=13526, Unknown=0, NotChecked=0, Total=16512 [2021-02-19 20:17:52,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2021-02-19 20:17:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 252. [2021-02-19 20:17:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.095617529880478) internal successors, (526), 251 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:52,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 526 transitions. [2021-02-19 20:17:52,114 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 526 transitions. Word has length 29 [2021-02-19 20:17:52,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:52,114 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 526 transitions. [2021-02-19 20:17:52,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:52,114 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 526 transitions. [2021-02-19 20:17:52,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 20:17:52,115 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:52,115 INFO L506 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:52,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:52,336 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:52,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:52,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1613965502, now seen corresponding path program 18 times [2021-02-19 20:17:52,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:52,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585069430] [2021-02-19 20:17:52,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:52,671 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:52,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585069430] [2021-02-19 20:17:52,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9407489] [2021-02-19 20:17:52,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:52,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 20:17:52,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:17:52,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 20:17:52,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:53,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:17:53,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:17:53,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:53,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:53,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:53,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-02-19 20:17:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 55 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:53,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:53,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-02-19 20:17:53,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011357506] [2021-02-19 20:17:53,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-02-19 20:17:53,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:53,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-02-19 20:17:53,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1840, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 20:17:53,637 INFO L87 Difference]: Start difference. First operand 252 states and 526 transitions. Second operand has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 46 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:58,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:58,067 INFO L93 Difference]: Finished difference Result 2077 states and 4039 transitions. [2021-02-19 20:17:58,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-02-19 20:17:58,067 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 46 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 20:17:58,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:58,071 INFO L225 Difference]: With dead ends: 2077 [2021-02-19 20:17:58,071 INFO L226 Difference]: Without dead ends: 1258 [2021-02-19 20:17:58,075 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5815 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3845, Invalid=17617, Unknown=0, NotChecked=0, Total=21462 [2021-02-19 20:17:58,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2021-02-19 20:17:58,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 292. [2021-02-19 20:17:58,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.0927835051546393) internal successors, (609), 291 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:58,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 609 transitions. [2021-02-19 20:17:58,086 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 609 transitions. Word has length 31 [2021-02-19 20:17:58,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:58,086 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 609 transitions. [2021-02-19 20:17:58,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 46 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:58,086 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 609 transitions. [2021-02-19 20:17:58,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 20:17:58,087 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:58,087 INFO L506 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:58,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:58,302 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:58,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:58,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1714799286, now seen corresponding path program 19 times [2021-02-19 20:17:58,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:58,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38487862] [2021-02-19 20:17:58,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:58,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38487862] [2021-02-19 20:17:58,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293564327] [2021-02-19 20:17:58,674 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:17:58,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 51 conjunts are in the unsatisfiable core [2021-02-19 20:17:58,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:17:58,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:17:58,802 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:17:58,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:17:58,804 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:17:58,804 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:17:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:17:58,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:17:58,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-02-19 20:17:58,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920461676] [2021-02-19 20:17:58,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 20:17:58,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:17:58,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 20:17:58,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2021-02-19 20:17:58,814 INFO L87 Difference]: Start difference. First operand 292 states and 609 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 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) [2021-02-19 20:17:59,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:17:59,723 INFO L93 Difference]: Finished difference Result 625 states and 1218 transitions. [2021-02-19 20:17:59,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 20:17:59,723 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 20:17:59,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:17:59,724 INFO L225 Difference]: With dead ends: 625 [2021-02-19 20:17:59,724 INFO L226 Difference]: Without dead ends: 397 [2021-02-19 20:17:59,725 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=411, Invalid=2139, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 20:17:59,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-02-19 20:17:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 76. [2021-02-19 20:17:59,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.9466666666666668) internal successors, (146), 75 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:17:59,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 146 transitions. [2021-02-19 20:17:59,728 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 146 transitions. Word has length 33 [2021-02-19 20:17:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:17:59,729 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 146 transitions. [2021-02-19 20:17:59,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 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) [2021-02-19 20:17:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 146 transitions. [2021-02-19 20:17:59,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-19 20:17:59,729 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:17:59,729 INFO L506 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:17:59,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:17:59,946 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:17:59,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:17:59,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1642241045, now seen corresponding path program 20 times [2021-02-19 20:17:59,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:17:59,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861525808] [2021-02-19 20:17:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:17:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:18:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:00,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861525808] [2021-02-19 20:18:00,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192364200] [2021-02-19 20:18:00,067 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 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 [2021-02-19 20:18:00,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:18:00,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:18:00,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 20:18:00,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:18:00,175 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:00,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:18:00,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-02-19 20:18:00,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205554957] [2021-02-19 20:18:00,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 20:18:00,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:18:00,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 20:18:00,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:18:00,177 INFO L87 Difference]: Start difference. First operand 76 states and 146 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:00,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:18:00,209 INFO L93 Difference]: Finished difference Result 468 states and 885 transitions. [2021-02-19 20:18:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-02-19 20:18:00,209 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-02-19 20:18:00,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:18:00,211 INFO L225 Difference]: With dead ends: 468 [2021-02-19 20:18:00,211 INFO L226 Difference]: Without dead ends: 441 [2021-02-19 20:18:00,211 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-02-19 20:18:00,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-02-19 20:18:00,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 363. [2021-02-19 20:18:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 2.085635359116022) internal successors, (755), 362 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 755 transitions. [2021-02-19 20:18:00,217 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 755 transitions. Word has length 34 [2021-02-19 20:18:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:18:00,217 INFO L480 AbstractCegarLoop]: Abstraction has 363 states and 755 transitions. [2021-02-19 20:18:00,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:00,218 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 755 transitions. [2021-02-19 20:18:00,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 20:18:00,218 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:18:00,218 INFO L506 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:18:00,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-02-19 20:18:00,434 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:18:00,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:18:00,434 INFO L82 PathProgramCache]: Analyzing trace with hash -911831422, now seen corresponding path program 21 times [2021-02-19 20:18:00,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:18:00,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294164324] [2021-02-19 20:18:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:18:00,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:18:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:00,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294164324] [2021-02-19 20:18:00,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774788666] [2021-02-19 20:18:00,956 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:18:00,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 20:18:00,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:18:00,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 20:18:00,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:18:02,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:18:02,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:18:02,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:18:02,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:18:02,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:18:02,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-02-19 20:18:02,091 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 78 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:02,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:18:02,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2021-02-19 20:18:02,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942309797] [2021-02-19 20:18:02,092 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-02-19 20:18:02,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:18:02,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-02-19 20:18:02,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=2538, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 20:18:02,093 INFO L87 Difference]: Start difference. First operand 363 states and 755 transitions. Second operand has 55 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:09,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:18:09,510 INFO L93 Difference]: Finished difference Result 2999 states and 5853 transitions. [2021-02-19 20:18:09,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2021-02-19 20:18:09,511 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 20:18:09,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:18:09,517 INFO L225 Difference]: With dead ends: 2999 [2021-02-19 20:18:09,517 INFO L226 Difference]: Without dead ends: 1876 [2021-02-19 20:18:09,519 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9872 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=6077, Invalid=28333, Unknown=0, NotChecked=0, Total=34410 [2021-02-19 20:18:09,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1876 states. [2021-02-19 20:18:09,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1876 to 381. [2021-02-19 20:18:09,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 2.086842105263158) internal successors, (793), 380 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:09,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 793 transitions. [2021-02-19 20:18:09,531 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 793 transitions. Word has length 35 [2021-02-19 20:18:09,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:18:09,532 INFO L480 AbstractCegarLoop]: Abstraction has 381 states and 793 transitions. [2021-02-19 20:18:09,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:09,532 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 793 transitions. [2021-02-19 20:18:09,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 20:18:09,532 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:18:09,532 INFO L506 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:18:09,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 20:18:09,753 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:18:09,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:18:09,754 INFO L82 PathProgramCache]: Analyzing trace with hash -216247050, now seen corresponding path program 22 times [2021-02-19 20:18:09,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:18:09,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486928094] [2021-02-19 20:18:09,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:18:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:18:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:10,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486928094] [2021-02-19 20:18:10,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450080043] [2021-02-19 20:18:10,234 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:18:10,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:18:10,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:18:10,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 59 conjunts are in the unsatisfiable core [2021-02-19 20:18:10,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:18:10,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:18:10,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:18:10,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:18:10,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:18:10,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:18:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:10,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:18:10,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-02-19 20:18:10,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426321671] [2021-02-19 20:18:10,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:18:10,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:18:10,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:18:10,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:18:10,372 INFO L87 Difference]: Start difference. First operand 381 states and 793 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:11,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:18:11,528 INFO L93 Difference]: Finished difference Result 811 states and 1586 transitions. [2021-02-19 20:18:11,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 20:18:11,529 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 20:18:11,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:18:11,530 INFO L225 Difference]: With dead ends: 811 [2021-02-19 20:18:11,530 INFO L226 Difference]: Without dead ends: 517 [2021-02-19 20:18:11,530 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=535, Invalid=2887, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 20:18:11,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-02-19 20:18:11,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 86. [2021-02-19 20:18:11,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.9529411764705882) internal successors, (166), 85 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:11,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 166 transitions. [2021-02-19 20:18:11,534 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 166 transitions. Word has length 37 [2021-02-19 20:18:11,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:18:11,534 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 166 transitions. [2021-02-19 20:18:11,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:11,534 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 166 transitions. [2021-02-19 20:18:11,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-02-19 20:18:11,534 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:18:11,534 INFO L506 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:18:11,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:18:11,755 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:18:11,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:18:11,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1909346773, now seen corresponding path program 23 times [2021-02-19 20:18:11,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:18:11,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48178735] [2021-02-19 20:18:11,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:18:11,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:18:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:11,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48178735] [2021-02-19 20:18:11,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204868182] [2021-02-19 20:18:11,912 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 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 [2021-02-19 20:18:11,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 20:18:11,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:18:11,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 20:18:11,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:18:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:12,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:18:12,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-02-19 20:18:12,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425918488] [2021-02-19 20:18:12,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 20:18:12,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:18:12,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 20:18:12,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:18:12,039 INFO L87 Difference]: Start difference. First operand 86 states and 166 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:12,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:18:12,076 INFO L93 Difference]: Finished difference Result 583 states and 1109 transitions. [2021-02-19 20:18:12,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 20:18:12,077 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-02-19 20:18:12,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:18:12,078 INFO L225 Difference]: With dead ends: 583 [2021-02-19 20:18:12,078 INFO L226 Difference]: Without dead ends: 552 [2021-02-19 20:18:12,078 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-02-19 20:18:12,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-02-19 20:18:12,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 462. [2021-02-19 20:18:12,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0802603036876355) internal successors, (959), 461 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 959 transitions. [2021-02-19 20:18:12,084 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 959 transitions. Word has length 38 [2021-02-19 20:18:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:18:12,085 INFO L480 AbstractCegarLoop]: Abstraction has 462 states and 959 transitions. [2021-02-19 20:18:12,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:12,085 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 959 transitions. [2021-02-19 20:18:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 20:18:12,085 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:18:12,086 INFO L506 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:18:12,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 20:18:12,302 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:18:12,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:18:12,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1740028478, now seen corresponding path program 24 times [2021-02-19 20:18:12,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:18:12,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498766248] [2021-02-19 20:18:12,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:18:12,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:18:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:12,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498766248] [2021-02-19 20:18:12,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600562245] [2021-02-19 20:18:12,852 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:18:12,882 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-02-19 20:18:12,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:18:12,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 63 conjunts are in the unsatisfiable core [2021-02-19 20:18:12,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:18:12,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:18:12,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:18:12,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:18:12,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:18:12,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:18:12,998 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:12,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:18:12,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-02-19 20:18:12,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503121794] [2021-02-19 20:18:12,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:18:12,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:18:13,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:18:13,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:18:13,000 INFO L87 Difference]: Start difference. First operand 462 states and 959 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:14,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:18:14,397 INFO L93 Difference]: Finished difference Result 949 states and 1857 transitions. [2021-02-19 20:18:14,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-02-19 20:18:14,398 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 20:18:14,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:18:14,399 INFO L225 Difference]: With dead ends: 949 [2021-02-19 20:18:14,399 INFO L226 Difference]: Without dead ends: 585 [2021-02-19 20:18:14,399 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=603, Invalid=3303, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 20:18:14,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-02-19 20:18:14,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 91. [2021-02-19 20:18:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.9555555555555555) internal successors, (176), 90 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:14,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 176 transitions. [2021-02-19 20:18:14,402 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 176 transitions. Word has length 39 [2021-02-19 20:18:14,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:18:14,402 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 176 transitions. [2021-02-19 20:18:14,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:14,403 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 176 transitions. [2021-02-19 20:18:14,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-19 20:18:14,403 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:18:14,403 INFO L506 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:18:14,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:18:14,610 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:18:14,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:18:14,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1916762761, now seen corresponding path program 25 times [2021-02-19 20:18:14,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:18:14,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841917721] [2021-02-19 20:18:14,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:18:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:18:14,794 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:14,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841917721] [2021-02-19 20:18:14,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648508306] [2021-02-19 20:18:14,795 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 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 [2021-02-19 20:18:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:18:14,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 20:18:14,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:18:14,938 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:14,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:18:14,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-02-19 20:18:14,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712952325] [2021-02-19 20:18:14,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 20:18:14,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:18:14,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 20:18:14,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-02-19 20:18:14,941 INFO L87 Difference]: Start difference. First operand 91 states and 176 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-02-19 20:18:14,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:18:14,990 INFO L93 Difference]: Finished difference Result 645 states and 1230 transitions. [2021-02-19 20:18:14,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 20:18:14,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-02-19 20:18:14,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:18:14,992 INFO L225 Difference]: With dead ends: 645 [2021-02-19 20:18:14,992 INFO L226 Difference]: Without dead ends: 612 [2021-02-19 20:18:14,992 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-02-19 20:18:14,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-02-19 20:18:14,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 516. [2021-02-19 20:18:15,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.0776699029126213) internal successors, (1070), 515 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1070 transitions. [2021-02-19 20:18:15,004 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1070 transitions. Word has length 40 [2021-02-19 20:18:15,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:18:15,004 INFO L480 AbstractCegarLoop]: Abstraction has 516 states and 1070 transitions. [2021-02-19 20:18:15,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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) [2021-02-19 20:18:15,005 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1070 transitions. [2021-02-19 20:18:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 20:18:15,006 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:18:15,006 INFO L506 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:18:15,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 20:18:15,222 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:18:15,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:18:15,222 INFO L82 PathProgramCache]: Analyzing trace with hash -439539914, now seen corresponding path program 26 times [2021-02-19 20:18:15,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:18:15,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789716225] [2021-02-19 20:18:15,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:18:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:18:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:15,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789716225] [2021-02-19 20:18:15,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420792129] [2021-02-19 20:18:15,861 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:18:15,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:18:15,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:18:15,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 67 conjunts are in the unsatisfiable core [2021-02-19 20:18:15,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:18:15,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:18:15,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:18:15,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:18:15,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:18:15,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:18:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:15,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:18:15,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-02-19 20:18:15,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127138011] [2021-02-19 20:18:15,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 20:18:15,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:18:15,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 20:18:15,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 20:18:15,998 INFO L87 Difference]: Start difference. First operand 516 states and 1070 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:17,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:18:17,500 INFO L93 Difference]: Finished difference Result 1059 states and 2075 transitions. [2021-02-19 20:18:17,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 20:18:17,500 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-02-19 20:18:17,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:18:17,502 INFO L225 Difference]: With dead ends: 1059 [2021-02-19 20:18:17,502 INFO L226 Difference]: Without dead ends: 655 [2021-02-19 20:18:17,502 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=675, Invalid=3747, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 20:18:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-02-19 20:18:17,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 96. [2021-02-19 20:18:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.9578947368421054) internal successors, (186), 95 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:17,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 186 transitions. [2021-02-19 20:18:17,505 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 186 transitions. Word has length 41 [2021-02-19 20:18:17,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:18:17,505 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 186 transitions. [2021-02-19 20:18:17,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:17,505 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 186 transitions. [2021-02-19 20:18:17,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-19 20:18:17,505 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:18:17,505 INFO L506 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:18:17,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-02-19 20:18:17,722 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:18:17,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:18:17,722 INFO L82 PathProgramCache]: Analyzing trace with hash -717764715, now seen corresponding path program 27 times [2021-02-19 20:18:17,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:18:17,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73075130] [2021-02-19 20:18:17,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:18:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:18:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:17,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73075130] [2021-02-19 20:18:17,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533338798] [2021-02-19 20:18:17,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:18:17,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-02-19 20:18:17,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:18:17,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 20:18:17,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:18:18,106 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:18,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:18:18,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 19 [2021-02-19 20:18:18,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918438985] [2021-02-19 20:18:18,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 20:18:18,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:18:18,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 20:18:18,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-02-19 20:18:18,107 INFO L87 Difference]: Start difference. First operand 96 states and 186 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:18,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:18:18,160 INFO L93 Difference]: Finished difference Result 710 states and 1357 transitions. [2021-02-19 20:18:18,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-19 20:18:18,161 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-02-19 20:18:18,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:18:18,163 INFO L225 Difference]: With dead ends: 710 [2021-02-19 20:18:18,163 INFO L226 Difference]: Without dead ends: 675 [2021-02-19 20:18:18,164 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-02-19 20:18:18,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-02-19 20:18:18,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 573. [2021-02-19 20:18:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.075174825174825) internal successors, (1187), 572 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1187 transitions. [2021-02-19 20:18:18,172 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1187 transitions. Word has length 42 [2021-02-19 20:18:18,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:18:18,172 INFO L480 AbstractCegarLoop]: Abstraction has 573 states and 1187 transitions. [2021-02-19 20:18:18,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:18,172 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1187 transitions. [2021-02-19 20:18:18,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-19 20:18:18,173 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:18:18,173 INFO L506 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:18:18,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 20:18:18,395 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:18:18,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:18:18,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1676870398, now seen corresponding path program 28 times [2021-02-19 20:18:18,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:18:18,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789845046] [2021-02-19 20:18:18,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:18:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:18:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:19,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789845046] [2021-02-19 20:18:19,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493734658] [2021-02-19 20:18:19,070 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 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 [2021-02-19 20:18:19,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:18:19,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:18:19,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 71 conjunts are in the unsatisfiable core [2021-02-19 20:18:19,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:18:19,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:18:19,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:18:19,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:18:19,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:18:19,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:18:19,205 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:19,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:18:19,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-02-19 20:18:19,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552210201] [2021-02-19 20:18:19,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 20:18:19,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:18:19,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 20:18:19,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 20:18:19,206 INFO L87 Difference]: Start difference. First operand 573 states and 1187 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 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) [2021-02-19 20:18:20,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:18:20,915 INFO L93 Difference]: Finished difference Result 1175 states and 2305 transitions. [2021-02-19 20:18:20,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 20:18:20,916 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-02-19 20:18:20,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:18:20,918 INFO L225 Difference]: With dead ends: 1175 [2021-02-19 20:18:20,918 INFO L226 Difference]: Without dead ends: 729 [2021-02-19 20:18:20,918 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=751, Invalid=4219, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 20:18:20,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-02-19 20:18:20,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 101. [2021-02-19 20:18:20,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.96) internal successors, (196), 100 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:20,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 196 transitions. [2021-02-19 20:18:20,921 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 196 transitions. Word has length 43 [2021-02-19 20:18:20,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:18:20,922 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 196 transitions. [2021-02-19 20:18:20,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 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) [2021-02-19 20:18:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 196 transitions. [2021-02-19 20:18:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-19 20:18:20,922 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:18:20,922 INFO L506 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:18:21,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:18:21,130 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:18:21,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:18:21,130 INFO L82 PathProgramCache]: Analyzing trace with hash -420304055, now seen corresponding path program 29 times [2021-02-19 20:18:21,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:18:21,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409946477] [2021-02-19 20:18:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:18:21,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:18:21,340 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:21,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409946477] [2021-02-19 20:18:21,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39971149] [2021-02-19 20:18:21,341 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 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 [2021-02-19 20:18:21,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-02-19 20:18:21,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:18:21,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 20:18:21,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:18:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:21,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:18:21,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 20 [2021-02-19 20:18:21,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335900247] [2021-02-19 20:18:21,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 20:18:21,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:18:21,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 20:18:21,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:18:21,532 INFO L87 Difference]: Start difference. First operand 101 states and 196 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:21,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:18:21,581 INFO L93 Difference]: Finished difference Result 778 states and 1490 transitions. [2021-02-19 20:18:21,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-02-19 20:18:21,581 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-02-19 20:18:21,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:18:21,583 INFO L225 Difference]: With dead ends: 778 [2021-02-19 20:18:21,583 INFO L226 Difference]: Without dead ends: 741 [2021-02-19 20:18:21,583 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-02-19 20:18:21,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-02-19 20:18:21,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 633. [2021-02-19 20:18:21,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.0727848101265822) internal successors, (1310), 632 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1310 transitions. [2021-02-19 20:18:21,591 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1310 transitions. Word has length 44 [2021-02-19 20:18:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:18:21,592 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 1310 transitions. [2021-02-19 20:18:21,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:21,592 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1310 transitions. [2021-02-19 20:18:21,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-19 20:18:21,593 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:18:21,593 INFO L506 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:18:21,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 20:18:21,806 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:18:21,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:18:21,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1297103222, now seen corresponding path program 30 times [2021-02-19 20:18:21,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:18:21,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496410293] [2021-02-19 20:18:21,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:18:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:18:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:22,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496410293] [2021-02-19 20:18:22,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767933365] [2021-02-19 20:18:22,543 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 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 [2021-02-19 20:18:22,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-02-19 20:18:22,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:18:22,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 71 conjunts are in the unsatisfiable core [2021-02-19 20:18:22,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:18:24,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:18:24,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 20:18:24,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:18:24,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2021-02-19 20:18:24,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:18:24,574 INFO L628 ElimStorePlain]: treesize reduction 5, result has 79.2 percent of original size [2021-02-19 20:18:24,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:18:24,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:36, output treesize:3 [2021-02-19 20:18:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:18:24,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:18:24,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 64 [2021-02-19 20:18:24,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253935844] [2021-02-19 20:18:24,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-02-19 20:18:24,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:18:24,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-02-19 20:18:24,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3986, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 20:18:24,588 INFO L87 Difference]: Start difference. First operand 633 states and 1310 transitions. Second operand has 65 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:18:28,356 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-02-19 20:18:29,671 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2021-02-19 20:18:31,297 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2021-02-19 20:18:31,672 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-02-19 20:18:33,457 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2021-02-19 20:18:34,066 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-02-19 20:18:35,695 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 79 [2021-02-19 20:18:36,256 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-02-19 20:18:37,658 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 79 [2021-02-19 20:18:38,208 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-02-19 20:18:39,400 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 81 [2021-02-19 20:18:39,958 WARN L202 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2021-02-19 20:18:41,059 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 83 [2021-02-19 20:18:41,666 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2021-02-19 20:18:42,514 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 85 [2021-02-19 20:18:43,086 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2021-02-19 20:18:44,327 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2021-02-19 20:18:46,808 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2021-02-19 20:18:47,780 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80 [2021-02-19 20:18:48,505 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78 [2021-02-19 20:18:48,860 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80 [2021-02-19 20:18:49,785 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 20:18:50,299 WARN L202 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2021-02-19 20:18:51,343 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-02-19 20:18:51,755 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74 [2021-02-19 20:18:52,666 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-02-19 20:18:53,036 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-02-19 20:18:54,337 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2021-02-19 20:18:54,747 WARN L202 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2021-02-19 20:18:55,991 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 20:18:56,355 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-02-19 20:18:58,027 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-02-19 20:19:00,879 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 20:19:02,842 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 20:19:06,780 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 20:19:08,765 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-02-19 20:19:10,654 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2021-02-19 20:19:18,453 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-02-19 20:19:19,646 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-02-19 20:19:20,971 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-02-19 20:19:21,345 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-02-19 20:19:21,629 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-02-19 20:19:22,570 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-02-19 20:19:23,066 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-02-19 20:19:23,386 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-02-19 20:19:24,488 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-02-19 20:19:24,748 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-02-19 20:19:25,112 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-02-19 20:19:25,444 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-02-19 20:19:25,759 WARN L202 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-02-19 20:19:26,385 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-02-19 20:19:26,817 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-02-19 20:19:27,097 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 20:19:27,330 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-02-19 20:19:27,681 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-02-19 20:19:28,043 WARN L202 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2021-02-19 20:19:28,370 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-02-19 20:19:29,807 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 20:19:30,096 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 20:19:30,389 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-02-19 20:19:30,797 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-02-19 20:19:31,145 WARN L202 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-02-19 20:19:31,480 WARN L202 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 60 [2021-02-19 20:19:32,591 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-02-19 20:19:33,069 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-02-19 20:19:33,373 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-02-19 20:19:33,940 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2021-02-19 20:19:34,279 WARN L202 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2021-02-19 20:19:35,518 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-02-19 20:19:36,111 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-02-19 20:19:36,390 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2021-02-19 20:19:36,770 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-02-19 20:19:37,100 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-02-19 20:19:38,183 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 48 [2021-02-19 20:19:38,672 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-02-19 20:19:39,271 WARN L202 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-02-19 20:19:39,546 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-02-19 20:19:40,221 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2021-02-19 20:19:40,813 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 53 [2021-02-19 20:19:41,172 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-02-19 20:19:41,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:19:41,356 INFO L93 Difference]: Finished difference Result 6296 states and 12174 transitions. [2021-02-19 20:19:41,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 322 states. [2021-02-19 20:19:41,357 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-02-19 20:19:41,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:19:41,367 INFO L225 Difference]: With dead ends: 6296 [2021-02-19 20:19:41,367 INFO L226 Difference]: Without dead ends: 3841 [2021-02-19 20:19:41,373 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 375 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53565 ImplicationChecksByTransitivity, 64.5s TimeCoverageRelationStatistics Valid=11488, Invalid=130264, Unknown=0, NotChecked=0, Total=141752 [2021-02-19 20:19:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2021-02-19 20:19:41,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 479. [2021-02-19 20:19:41,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.1192468619246863) internal successors, (1013), 478 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:19:41,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1013 transitions. [2021-02-19 20:19:41,421 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1013 transitions. Word has length 45 [2021-02-19 20:19:41,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:19:41,422 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1013 transitions. [2021-02-19 20:19:41,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 1.1384615384615384) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:19:41,422 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1013 transitions. [2021-02-19 20:19:41,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 20:19:41,423 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:19:41,423 INFO L506 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:19:41,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:19:41,638 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:19:41,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:19:41,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1555450814, now seen corresponding path program 31 times [2021-02-19 20:19:41,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:19:41,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798539750] [2021-02-19 20:19:41,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:19:41,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:19:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:19:43,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798539750] [2021-02-19 20:19:43,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568353191] [2021-02-19 20:19:43,240 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 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 [2021-02-19 20:19:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:19:43,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 79 conjunts are in the unsatisfiable core [2021-02-19 20:19:43,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:19:43,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:19:43,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:19:43,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:19:43,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:19:43,519 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:19:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:19:43,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:19:43,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2021-02-19 20:19:43,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394936812] [2021-02-19 20:19:43,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 20:19:43,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:19:43,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 20:19:43,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 20:19:43,536 INFO L87 Difference]: Start difference. First operand 479 states and 1013 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:19:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:19:47,462 INFO L93 Difference]: Finished difference Result 1430 states and 2873 transitions. [2021-02-19 20:19:47,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 20:19:47,463 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-02-19 20:19:47,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:19:47,465 INFO L225 Difference]: With dead ends: 1430 [2021-02-19 20:19:47,466 INFO L226 Difference]: Without dead ends: 916 [2021-02-19 20:19:47,466 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=915, Invalid=5247, Unknown=0, NotChecked=0, Total=6162 [2021-02-19 20:19:47,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-02-19 20:19:47,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 111. [2021-02-19 20:19:47,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.9636363636363636) internal successors, (216), 110 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:19:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 216 transitions. [2021-02-19 20:19:47,470 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 216 transitions. Word has length 47 [2021-02-19 20:19:47,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:19:47,470 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 216 transitions. [2021-02-19 20:19:47,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:19:47,470 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 216 transitions. [2021-02-19 20:19:47,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-02-19 20:19:47,471 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:19:47,471 INFO L506 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:19:47,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 20:19:47,686 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:19:47,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:19:47,686 INFO L82 PathProgramCache]: Analyzing trace with hash -951264247, now seen corresponding path program 32 times [2021-02-19 20:19:47,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:19:47,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138351974] [2021-02-19 20:19:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:19:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:19:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:19:48,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138351974] [2021-02-19 20:19:48,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379815087] [2021-02-19 20:19:48,097 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 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 [2021-02-19 20:19:48,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:19:48,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:19:48,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2021-02-19 20:19:48,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:19:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:19:48,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:19:48,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 22 [2021-02-19 20:19:48,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121889608] [2021-02-19 20:19:48,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 20:19:48,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:19:48,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 20:19:48,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:19:48,453 INFO L87 Difference]: Start difference. First operand 111 states and 216 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2021-02-19 20:19:48,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:19:48,586 INFO L93 Difference]: Finished difference Result 923 states and 1774 transitions. [2021-02-19 20:19:48,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 20:19:48,588 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-02-19 20:19:48,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:19:48,591 INFO L225 Difference]: With dead ends: 923 [2021-02-19 20:19:48,591 INFO L226 Difference]: Without dead ends: 882 [2021-02-19 20:19:48,591 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-02-19 20:19:48,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-02-19 20:19:48,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 762. [2021-02-19 20:19:48,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 2.0683311432325886) internal successors, (1574), 761 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:19:48,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1574 transitions. [2021-02-19 20:19:48,601 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1574 transitions. Word has length 48 [2021-02-19 20:19:48,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:19:48,602 INFO L480 AbstractCegarLoop]: Abstraction has 762 states and 1574 transitions. [2021-02-19 20:19:48,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 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) [2021-02-19 20:19:48,602 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1574 transitions. [2021-02-19 20:19:48,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-19 20:19:48,603 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:19:48,603 INFO L506 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:19:48,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-02-19 20:19:48,822 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:19:48,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:19:48,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1968337994, now seen corresponding path program 33 times [2021-02-19 20:19:48,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:19:48,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008083092] [2021-02-19 20:19:48,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:19:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:19:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:19:50,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008083092] [2021-02-19 20:19:50,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664336080] [2021-02-19 20:19:50,596 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 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 [2021-02-19 20:19:50,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-02-19 20:19:50,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:19:50,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 83 conjunts are in the unsatisfiable core [2021-02-19 20:19:50,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:19:50,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:19:50,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:19:50,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:19:50,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:19:50,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:19:50,890 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:19:50,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:19:50,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2021-02-19 20:19:50,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037918599] [2021-02-19 20:19:50,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-02-19 20:19:50,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:19:50,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-02-19 20:19:50,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 20:19:50,891 INFO L87 Difference]: Start difference. First operand 762 states and 1574 transitions. Second operand has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:19:55,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:19:55,590 INFO L93 Difference]: Finished difference Result 1559 states and 3067 transitions. [2021-02-19 20:19:55,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 20:19:55,591 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-02-19 20:19:55,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:19:55,594 INFO L225 Difference]: With dead ends: 1559 [2021-02-19 20:19:55,594 INFO L226 Difference]: Without dead ends: 975 [2021-02-19 20:19:55,595 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1003, Invalid=5803, Unknown=0, NotChecked=0, Total=6806 [2021-02-19 20:19:55,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-02-19 20:19:55,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 116. [2021-02-19 20:19:55,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.9652173913043478) internal successors, (226), 115 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:19:55,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 226 transitions. [2021-02-19 20:19:55,599 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 226 transitions. Word has length 49 [2021-02-19 20:19:55,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:19:55,599 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 226 transitions. [2021-02-19 20:19:55,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:19:55,599 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 226 transitions. [2021-02-19 20:19:55,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-02-19 20:19:55,599 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:19:55,600 INFO L506 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:19:55,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 20:19:55,814 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:19:55,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:19:55,814 INFO L82 PathProgramCache]: Analyzing trace with hash -865864939, now seen corresponding path program 34 times [2021-02-19 20:19:55,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:19:55,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935217390] [2021-02-19 20:19:55,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:19:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:19:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:19:56,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935217390] [2021-02-19 20:19:56,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375730818] [2021-02-19 20:19:56,376 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 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 [2021-02-19 20:19:56,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:19:56,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:19:56,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 20:19:56,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:19:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:19:56,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:19:56,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 23 [2021-02-19 20:19:56,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036914939] [2021-02-19 20:19:56,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 20:19:56,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:19:56,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 20:19:56,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-02-19 20:19:56,682 INFO L87 Difference]: Start difference. First operand 116 states and 226 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:19:56,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:19:56,829 INFO L93 Difference]: Finished difference Result 1000 states and 1925 transitions. [2021-02-19 20:19:56,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 20:19:56,831 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-02-19 20:19:56,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:19:56,834 INFO L225 Difference]: With dead ends: 1000 [2021-02-19 20:19:56,834 INFO L226 Difference]: Without dead ends: 957 [2021-02-19 20:19:56,834 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-02-19 20:19:56,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2021-02-19 20:19:56,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 831. [2021-02-19 20:19:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 2.066265060240964) internal successors, (1715), 830 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:19:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1715 transitions. [2021-02-19 20:19:56,845 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1715 transitions. Word has length 50 [2021-02-19 20:19:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:19:56,845 INFO L480 AbstractCegarLoop]: Abstraction has 831 states and 1715 transitions. [2021-02-19 20:19:56,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:19:56,845 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1715 transitions. [2021-02-19 20:19:56,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 20:19:56,846 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:19:56,846 INFO L506 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:19:57,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 20:19:57,062 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:19:57,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:19:57,062 INFO L82 PathProgramCache]: Analyzing trace with hash 978807682, now seen corresponding path program 35 times [2021-02-19 20:19:57,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:19:57,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357352992] [2021-02-19 20:19:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:19:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:19:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:19:59,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357352992] [2021-02-19 20:19:59,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471544280] [2021-02-19 20:19:59,345 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:19:59,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-02-19 20:19:59,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:19:59,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 87 conjunts are in the unsatisfiable core [2021-02-19 20:19:59,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:19:59,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:19:59,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:19:59,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:19:59,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:19:59,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:19:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:19:59,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:19:59,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2021-02-19 20:19:59,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958583191] [2021-02-19 20:19:59,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-02-19 20:19:59,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:19:59,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-02-19 20:19:59,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 20:19:59,711 INFO L87 Difference]: Start difference. First operand 831 states and 1715 transitions. Second operand has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 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) [2021-02-19 20:20:05,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:20:05,005 INFO L93 Difference]: Finished difference Result 1699 states and 3345 transitions. [2021-02-19 20:20:05,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 20:20:05,007 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-02-19 20:20:05,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:20:05,010 INFO L225 Difference]: With dead ends: 1699 [2021-02-19 20:20:05,010 INFO L226 Difference]: Without dead ends: 1065 [2021-02-19 20:20:05,010 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1095, Invalid=6387, Unknown=0, NotChecked=0, Total=7482 [2021-02-19 20:20:05,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2021-02-19 20:20:05,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 121. [2021-02-19 20:20:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.9666666666666666) internal successors, (236), 120 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 236 transitions. [2021-02-19 20:20:05,015 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 236 transitions. Word has length 51 [2021-02-19 20:20:05,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:20:05,015 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 236 transitions. [2021-02-19 20:20:05,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 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) [2021-02-19 20:20:05,015 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 236 transitions. [2021-02-19 20:20:05,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-02-19 20:20:05,015 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:20:05,016 INFO L506 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:20:05,230 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 20:20:05,230 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:20:05,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:20:05,230 INFO L82 PathProgramCache]: Analyzing trace with hash 301337801, now seen corresponding path program 36 times [2021-02-19 20:20:05,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:20:05,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332401685] [2021-02-19 20:20:05,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:20:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:20:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:05,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332401685] [2021-02-19 20:20:05,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077664191] [2021-02-19 20:20:05,908 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 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 [2021-02-19 20:20:05,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-02-19 20:20:05,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:20:05,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 44 conjunts are in the unsatisfiable core [2021-02-19 20:20:05,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:20:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:06,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:20:06,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 24 [2021-02-19 20:20:06,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338798505] [2021-02-19 20:20:06,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 20:20:06,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:20:06,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 20:20:06,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-02-19 20:20:06,333 INFO L87 Difference]: Start difference. First operand 121 states and 236 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:06,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:20:06,496 INFO L93 Difference]: Finished difference Result 1080 states and 2082 transitions. [2021-02-19 20:20:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 20:20:06,525 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-02-19 20:20:06,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:20:06,528 INFO L225 Difference]: With dead ends: 1080 [2021-02-19 20:20:06,528 INFO L226 Difference]: Without dead ends: 1035 [2021-02-19 20:20:06,528 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-02-19 20:20:06,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2021-02-19 20:20:06,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 903. [2021-02-19 20:20:06,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 2.0643015521064303) internal successors, (1862), 902 states have internal predecessors, (1862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:06,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 1862 transitions. [2021-02-19 20:20:06,544 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 1862 transitions. Word has length 52 [2021-02-19 20:20:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:20:06,544 INFO L480 AbstractCegarLoop]: Abstraction has 903 states and 1862 transitions. [2021-02-19 20:20:06,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 1862 transitions. [2021-02-19 20:20:06,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 20:20:06,546 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:20:06,546 INFO L506 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:20:06,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 20:20:06,767 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:20:06,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:20:06,768 INFO L82 PathProgramCache]: Analyzing trace with hash -789766666, now seen corresponding path program 37 times [2021-02-19 20:20:06,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:20:06,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439702278] [2021-02-19 20:20:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:20:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:20:09,004 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:09,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439702278] [2021-02-19 20:20:09,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366702510] [2021-02-19 20:20:09,004 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:20:09,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:20:09,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 91 conjunts are in the unsatisfiable core [2021-02-19 20:20:09,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:20:09,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:20:09,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:20:09,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:20:09,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:20:09,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:20:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:09,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:20:09,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2021-02-19 20:20:09,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247946330] [2021-02-19 20:20:09,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-02-19 20:20:09,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:20:09,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-02-19 20:20:09,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 20:20:09,363 INFO L87 Difference]: Start difference. First operand 903 states and 1862 transitions. Second operand has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:15,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:20:15,486 INFO L93 Difference]: Finished difference Result 1845 states and 3635 transitions. [2021-02-19 20:20:15,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 20:20:15,488 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-02-19 20:20:15,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:20:15,490 INFO L225 Difference]: With dead ends: 1845 [2021-02-19 20:20:15,490 INFO L226 Difference]: Without dead ends: 1159 [2021-02-19 20:20:15,491 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1191, Invalid=6999, Unknown=0, NotChecked=0, Total=8190 [2021-02-19 20:20:15,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2021-02-19 20:20:15,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 126. [2021-02-19 20:20:15,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.968) internal successors, (246), 125 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:15,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 246 transitions. [2021-02-19 20:20:15,495 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 246 transitions. Word has length 53 [2021-02-19 20:20:15,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:20:15,495 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 246 transitions. [2021-02-19 20:20:15,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:15,496 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 246 transitions. [2021-02-19 20:20:15,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-02-19 20:20:15,496 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:20:15,496 INFO L506 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:20:15,698 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 20:20:15,698 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:20:15,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:20:15,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1310107861, now seen corresponding path program 38 times [2021-02-19 20:20:15,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:20:15,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247816799] [2021-02-19 20:20:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:20:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:20:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:16,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247816799] [2021-02-19 20:20:16,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908319660] [2021-02-19 20:20:16,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:20:16,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:20:16,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:20:16,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 20:20:16,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:20:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:16,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:20:16,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 25 [2021-02-19 20:20:16,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8952581] [2021-02-19 20:20:16,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 20:20:16,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:20:16,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 20:20:16,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-02-19 20:20:16,710 INFO L87 Difference]: Start difference. First operand 126 states and 246 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:20:16,873 INFO L93 Difference]: Finished difference Result 1163 states and 2245 transitions. [2021-02-19 20:20:16,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 20:20:16,875 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-02-19 20:20:16,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:20:16,877 INFO L225 Difference]: With dead ends: 1163 [2021-02-19 20:20:16,877 INFO L226 Difference]: Without dead ends: 1116 [2021-02-19 20:20:16,878 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-02-19 20:20:16,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-02-19 20:20:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 978. [2021-02-19 20:20:16,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 977 states have (on average 2.0624360286591608) internal successors, (2015), 977 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:16,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 2015 transitions. [2021-02-19 20:20:16,890 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 2015 transitions. Word has length 54 [2021-02-19 20:20:16,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:20:16,890 INFO L480 AbstractCegarLoop]: Abstraction has 978 states and 2015 transitions. [2021-02-19 20:20:16,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:16,890 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 2015 transitions. [2021-02-19 20:20:16,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-19 20:20:16,891 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:20:16,891 INFO L506 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:20:17,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 20:20:17,112 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:20:17,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:20:17,113 INFO L82 PathProgramCache]: Analyzing trace with hash 730735298, now seen corresponding path program 39 times [2021-02-19 20:20:17,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:20:17,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265221784] [2021-02-19 20:20:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:20:17,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:20:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:19,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265221784] [2021-02-19 20:20:19,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106826048] [2021-02-19 20:20:19,688 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 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 [2021-02-19 20:20:19,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-02-19 20:20:19,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:20:19,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 95 conjunts are in the unsatisfiable core [2021-02-19 20:20:19,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:20:20,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:20:20,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:20:20,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:20:20,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:20:20,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:20:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:20,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:20:20,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2021-02-19 20:20:20,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423989262] [2021-02-19 20:20:20,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-02-19 20:20:20,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:20:20,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-02-19 20:20:20,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 20:20:20,117 INFO L87 Difference]: Start difference. First operand 978 states and 2015 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:27,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:20:27,137 INFO L93 Difference]: Finished difference Result 1997 states and 3937 transitions. [2021-02-19 20:20:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-02-19 20:20:27,139 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-02-19 20:20:27,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:20:27,140 INFO L225 Difference]: With dead ends: 1997 [2021-02-19 20:20:27,140 INFO L226 Difference]: Without dead ends: 1257 [2021-02-19 20:20:27,141 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1291, Invalid=7639, Unknown=0, NotChecked=0, Total=8930 [2021-02-19 20:20:27,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2021-02-19 20:20:27,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 131. [2021-02-19 20:20:27,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.9692307692307693) internal successors, (256), 130 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:27,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 256 transitions. [2021-02-19 20:20:27,145 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 256 transitions. Word has length 55 [2021-02-19 20:20:27,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:20:27,145 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 256 transitions. [2021-02-19 20:20:27,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:27,145 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 256 transitions. [2021-02-19 20:20:27,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-19 20:20:27,145 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:20:27,145 INFO L506 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:20:27,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:20:27,346 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:20:27,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:20:27,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1201028489, now seen corresponding path program 40 times [2021-02-19 20:20:27,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:20:27,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282065523] [2021-02-19 20:20:27,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:20:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:20:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:28,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282065523] [2021-02-19 20:20:28,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896757835] [2021-02-19 20:20:28,045 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 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 [2021-02-19 20:20:28,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:20:28,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:20:28,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 48 conjunts are in the unsatisfiable core [2021-02-19 20:20:28,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:20:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 300 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:28,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:20:28,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 26 [2021-02-19 20:20:28,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670463497] [2021-02-19 20:20:28,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 20:20:28,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:20:28,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 20:20:28,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-02-19 20:20:28,484 INFO L87 Difference]: Start difference. First operand 131 states and 256 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2021-02-19 20:20:28,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:20:28,638 INFO L93 Difference]: Finished difference Result 1249 states and 2414 transitions. [2021-02-19 20:20:28,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 20:20:28,639 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-02-19 20:20:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:20:28,641 INFO L225 Difference]: With dead ends: 1249 [2021-02-19 20:20:28,641 INFO L226 Difference]: Without dead ends: 1200 [2021-02-19 20:20:28,641 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-02-19 20:20:28,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-02-19 20:20:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1056. [2021-02-19 20:20:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 2.060663507109005) internal successors, (2174), 1055 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 2174 transitions. [2021-02-19 20:20:28,654 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 2174 transitions. Word has length 56 [2021-02-19 20:20:28,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:20:28,655 INFO L480 AbstractCegarLoop]: Abstraction has 1056 states and 2174 transitions. [2021-02-19 20:20:28,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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) [2021-02-19 20:20:28,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 2174 transitions. [2021-02-19 20:20:28,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-19 20:20:28,656 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:20:28,656 INFO L506 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:20:28,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:20:28,870 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:20:28,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:20:28,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1525223370, now seen corresponding path program 41 times [2021-02-19 20:20:28,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:20:28,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298646146] [2021-02-19 20:20:28,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:20:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:20:31,707 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:31,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298646146] [2021-02-19 20:20:31,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234556585] [2021-02-19 20:20:31,707 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 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 [2021-02-19 20:20:31,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-02-19 20:20:31,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:20:31,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 99 conjunts are in the unsatisfiable core [2021-02-19 20:20:31,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:20:32,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:20:32,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:20:32,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:20:32,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:20:32,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:20:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:32,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:20:32,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2021-02-19 20:20:32,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687375914] [2021-02-19 20:20:32,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-02-19 20:20:32,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:20:32,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-02-19 20:20:32,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 20:20:32,128 INFO L87 Difference]: Start difference. First operand 1056 states and 2174 transitions. Second operand has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:40,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:20:40,066 INFO L93 Difference]: Finished difference Result 2155 states and 4251 transitions. [2021-02-19 20:20:40,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 20:20:40,069 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-02-19 20:20:40,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:20:40,070 INFO L225 Difference]: With dead ends: 2155 [2021-02-19 20:20:40,071 INFO L226 Difference]: Without dead ends: 1359 [2021-02-19 20:20:40,071 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1395, Invalid=8307, Unknown=0, NotChecked=0, Total=9702 [2021-02-19 20:20:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-02-19 20:20:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 136. [2021-02-19 20:20:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.9703703703703703) internal successors, (266), 135 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 266 transitions. [2021-02-19 20:20:40,077 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 266 transitions. Word has length 57 [2021-02-19 20:20:40,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:20:40,077 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 266 transitions. [2021-02-19 20:20:40,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:40,077 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 266 transitions. [2021-02-19 20:20:40,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-02-19 20:20:40,078 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:20:40,078 INFO L506 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:20:40,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-02-19 20:20:40,299 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:20:40,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:20:40,300 INFO L82 PathProgramCache]: Analyzing trace with hash -14213483, now seen corresponding path program 42 times [2021-02-19 20:20:40,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:20:40,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568834876] [2021-02-19 20:20:40,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:20:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:20:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:41,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568834876] [2021-02-19 20:20:41,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846104313] [2021-02-19 20:20:41,109 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 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 [2021-02-19 20:20:41,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-02-19 20:20:41,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:20:41,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 50 conjunts are in the unsatisfiable core [2021-02-19 20:20:41,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:20:41,544 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 325 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:41,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:20:41,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 27 [2021-02-19 20:20:41,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697427541] [2021-02-19 20:20:41,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 20:20:41,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:20:41,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 20:20:41,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-02-19 20:20:41,545 INFO L87 Difference]: Start difference. First operand 136 states and 266 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:41,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:20:41,726 INFO L93 Difference]: Finished difference Result 1338 states and 2589 transitions. [2021-02-19 20:20:41,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 20:20:41,728 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-02-19 20:20:41,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:20:41,729 INFO L225 Difference]: With dead ends: 1338 [2021-02-19 20:20:41,730 INFO L226 Difference]: Without dead ends: 1287 [2021-02-19 20:20:41,730 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-02-19 20:20:41,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2021-02-19 20:20:41,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1137. [2021-02-19 20:20:41,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 2.0589788732394365) internal successors, (2339), 1136 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:41,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 2339 transitions. [2021-02-19 20:20:41,741 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 2339 transitions. Word has length 58 [2021-02-19 20:20:41,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:20:41,741 INFO L480 AbstractCegarLoop]: Abstraction has 1137 states and 2339 transitions. [2021-02-19 20:20:41,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:41,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 2339 transitions. [2021-02-19 20:20:41,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-02-19 20:20:41,743 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:20:41,743 INFO L506 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:20:41,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:20:41,958 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:20:41,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:20:41,958 INFO L82 PathProgramCache]: Analyzing trace with hash -12199422, now seen corresponding path program 43 times [2021-02-19 20:20:41,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:20:41,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714942877] [2021-02-19 20:20:41,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:20:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:20:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:45,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714942877] [2021-02-19 20:20:45,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722568415] [2021-02-19 20:20:45,346 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 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 [2021-02-19 20:20:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:20:45,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 103 conjunts are in the unsatisfiable core [2021-02-19 20:20:45,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:20:45,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:20:45,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:20:45,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:20:45,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:20:45,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:20:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:45,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:20:45,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2021-02-19 20:20:45,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307996402] [2021-02-19 20:20:45,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-02-19 20:20:45,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:20:45,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-02-19 20:20:45,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 20:20:45,751 INFO L87 Difference]: Start difference. First operand 1137 states and 2339 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 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) [2021-02-19 20:20:54,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:20:54,685 INFO L93 Difference]: Finished difference Result 2319 states and 4577 transitions. [2021-02-19 20:20:54,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 20:20:54,687 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-02-19 20:20:54,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:20:54,689 INFO L225 Difference]: With dead ends: 2319 [2021-02-19 20:20:54,689 INFO L226 Difference]: Without dead ends: 1465 [2021-02-19 20:20:54,690 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1503, Invalid=9003, Unknown=0, NotChecked=0, Total=10506 [2021-02-19 20:20:54,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2021-02-19 20:20:54,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 141. [2021-02-19 20:20:54,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.9714285714285715) internal successors, (276), 140 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:54,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 276 transitions. [2021-02-19 20:20:54,694 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 276 transitions. Word has length 59 [2021-02-19 20:20:54,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:20:54,695 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 276 transitions. [2021-02-19 20:20:54,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 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) [2021-02-19 20:20:54,695 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 276 transitions. [2021-02-19 20:20:54,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-02-19 20:20:54,695 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:20:54,695 INFO L506 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:20:54,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:20:54,896 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:20:54,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:20:54,896 INFO L82 PathProgramCache]: Analyzing trace with hash -355111351, now seen corresponding path program 44 times [2021-02-19 20:20:54,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:20:54,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917154376] [2021-02-19 20:20:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:20:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:20:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:55,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917154376] [2021-02-19 20:20:55,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178831487] [2021-02-19 20:20:55,913 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:20:55,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:20:55,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:20:55,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2021-02-19 20:20:55,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:20:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 351 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:20:56,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:20:56,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 28 [2021-02-19 20:20:56,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077263904] [2021-02-19 20:20:56,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 20:20:56,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:20:56,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 20:20:56,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:20:56,403 INFO L87 Difference]: Start difference. First operand 141 states and 276 transitions. Second operand has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:56,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:20:56,571 INFO L93 Difference]: Finished difference Result 1430 states and 2770 transitions. [2021-02-19 20:20:56,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 20:20:56,574 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-02-19 20:20:56,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:20:56,576 INFO L225 Difference]: With dead ends: 1430 [2021-02-19 20:20:56,576 INFO L226 Difference]: Without dead ends: 1377 [2021-02-19 20:20:56,576 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-02-19 20:20:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2021-02-19 20:20:56,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1221. [2021-02-19 20:20:56,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.057377049180328) internal successors, (2510), 1220 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:56,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 2510 transitions. [2021-02-19 20:20:56,591 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 2510 transitions. Word has length 60 [2021-02-19 20:20:56,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:20:56,591 INFO L480 AbstractCegarLoop]: Abstraction has 1221 states and 2510 transitions. [2021-02-19 20:20:56,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 28 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:20:56,591 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 2510 transitions. [2021-02-19 20:20:56,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-02-19 20:20:56,592 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:20:56,592 INFO L506 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:20:56,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-02-19 20:20:56,813 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:20:56,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:20:56,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1580401270, now seen corresponding path program 45 times [2021-02-19 20:20:56,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:20:56,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395089717] [2021-02-19 20:20:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:20:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:21:00,609 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:21:00,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395089717] [2021-02-19 20:21:00,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841545463] [2021-02-19 20:21:00,609 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 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 [2021-02-19 20:21:00,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-02-19 20:21:00,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:21:00,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 107 conjunts are in the unsatisfiable core [2021-02-19 20:21:00,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:21:01,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:21:01,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:21:01,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:21:01,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:21:01,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:21:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:21:01,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:21:01,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2021-02-19 20:21:01,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290069609] [2021-02-19 20:21:01,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-02-19 20:21:01,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:21:01,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-02-19 20:21:01,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 20:21:01,152 INFO L87 Difference]: Start difference. First operand 1221 states and 2510 transitions. Second operand has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:06,890 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-02-19 20:21:07,175 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-02-19 20:21:07,772 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-02-19 20:21:11,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:21:11,312 INFO L93 Difference]: Finished difference Result 2489 states and 4915 transitions. [2021-02-19 20:21:11,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 20:21:11,314 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-02-19 20:21:11,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:21:11,316 INFO L225 Difference]: With dead ends: 2489 [2021-02-19 20:21:11,316 INFO L226 Difference]: Without dead ends: 1575 [2021-02-19 20:21:11,317 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1615, Invalid=9727, Unknown=0, NotChecked=0, Total=11342 [2021-02-19 20:21:11,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-02-19 20:21:11,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 146. [2021-02-19 20:21:11,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.9724137931034482) internal successors, (286), 145 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:11,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 286 transitions. [2021-02-19 20:21:11,322 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 286 transitions. Word has length 61 [2021-02-19 20:21:11,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:21:11,322 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 286 transitions. [2021-02-19 20:21:11,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:11,322 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 286 transitions. [2021-02-19 20:21:11,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-02-19 20:21:11,323 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:21:11,323 INFO L506 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:21:11,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-02-19 20:21:11,538 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:21:11,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:21:11,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1770869845, now seen corresponding path program 46 times [2021-02-19 20:21:11,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:21:11,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407863589] [2021-02-19 20:21:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:21:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:21:12,561 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:21:12,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407863589] [2021-02-19 20:21:12,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770733941] [2021-02-19 20:21:12,561 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 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 [2021-02-19 20:21:12,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:21:12,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:21:12,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 54 conjunts are in the unsatisfiable core [2021-02-19 20:21:12,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:21:13,066 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 378 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:21:13,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:21:13,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 29 [2021-02-19 20:21:13,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142623277] [2021-02-19 20:21:13,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 20:21:13,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:21:13,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 20:21:13,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:21:13,067 INFO L87 Difference]: Start difference. First operand 146 states and 286 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:13,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:21:13,265 INFO L93 Difference]: Finished difference Result 1525 states and 2957 transitions. [2021-02-19 20:21:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 20:21:13,268 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-02-19 20:21:13,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:21:13,271 INFO L225 Difference]: With dead ends: 1525 [2021-02-19 20:21:13,271 INFO L226 Difference]: Without dead ends: 1470 [2021-02-19 20:21:13,271 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-02-19 20:21:13,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2021-02-19 20:21:13,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 1308. [2021-02-19 20:21:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1308 states, 1307 states have (on average 2.0558530986993113) internal successors, (2687), 1307 states have internal predecessors, (2687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:13,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 2687 transitions. [2021-02-19 20:21:13,296 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 2687 transitions. Word has length 62 [2021-02-19 20:21:13,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:21:13,297 INFO L480 AbstractCegarLoop]: Abstraction has 1308 states and 2687 transitions. [2021-02-19 20:21:13,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:13,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 2687 transitions. [2021-02-19 20:21:13,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-02-19 20:21:13,298 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:21:13,298 INFO L506 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:21:13,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-02-19 20:21:13,514 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:21:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:21:13,514 INFO L82 PathProgramCache]: Analyzing trace with hash 2077659458, now seen corresponding path program 47 times [2021-02-19 20:21:13,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:21:13,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478929361] [2021-02-19 20:21:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:21:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:21:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:21:17,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478929361] [2021-02-19 20:21:17,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323744474] [2021-02-19 20:21:17,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 20:21:17,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-02-19 20:21:17,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:21:17,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 111 conjunts are in the unsatisfiable core [2021-02-19 20:21:17,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:21:18,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:21:18,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:21:18,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:21:18,090 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:21:18,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:21:18,119 INFO L134 CoverageAnalysis]: Checked inductivity of 756 backedges. 0 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:21:18,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:21:18,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2021-02-19 20:21:18,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196963357] [2021-02-19 20:21:18,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-02-19 20:21:18,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:21:18,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-02-19 20:21:18,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 20:21:18,121 INFO L87 Difference]: Start difference. First operand 1308 states and 2687 transitions. Second operand has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:23,916 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-02-19 20:21:24,198 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-02-19 20:21:24,487 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-02-19 20:21:24,788 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-02-19 20:21:25,091 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-02-19 20:21:25,467 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-02-19 20:21:25,647 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-02-19 20:21:29,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:21:29,548 INFO L93 Difference]: Finished difference Result 2665 states and 5265 transitions. [2021-02-19 20:21:29,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 20:21:29,551 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-02-19 20:21:29,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:21:29,554 INFO L225 Difference]: With dead ends: 2665 [2021-02-19 20:21:29,554 INFO L226 Difference]: Without dead ends: 1689 [2021-02-19 20:21:29,554 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1731, Invalid=10479, Unknown=0, NotChecked=0, Total=12210 [2021-02-19 20:21:29,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1689 states. [2021-02-19 20:21:29,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1689 to 151. [2021-02-19 20:21:29,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.9733333333333334) internal successors, (296), 150 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 296 transitions. [2021-02-19 20:21:29,562 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 296 transitions. Word has length 63 [2021-02-19 20:21:29,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:21:29,562 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 296 transitions. [2021-02-19 20:21:29,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:29,562 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 296 transitions. [2021-02-19 20:21:29,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-02-19 20:21:29,562 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:21:29,563 INFO L506 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:21:29,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:21:29,784 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:21:29,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:21:29,784 INFO L82 PathProgramCache]: Analyzing trace with hash 6004489, now seen corresponding path program 48 times [2021-02-19 20:21:29,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:21:29,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444701350] [2021-02-19 20:21:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:21:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:21:30,835 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:21:30,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444701350] [2021-02-19 20:21:30,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564707214] [2021-02-19 20:21:30,835 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 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 [2021-02-19 20:21:30,892 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-02-19 20:21:30,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:21:30,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 56 conjunts are in the unsatisfiable core [2021-02-19 20:21:30,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:21:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 406 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:21:31,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:21:31,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 30 [2021-02-19 20:21:31,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625683730] [2021-02-19 20:21:31,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 20:21:31,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:21:31,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 20:21:31,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:21:31,419 INFO L87 Difference]: Start difference. First operand 151 states and 296 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:31,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:21:31,633 INFO L93 Difference]: Finished difference Result 1623 states and 3150 transitions. [2021-02-19 20:21:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 20:21:31,636 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-02-19 20:21:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:21:31,638 INFO L225 Difference]: With dead ends: 1623 [2021-02-19 20:21:31,638 INFO L226 Difference]: Without dead ends: 1566 [2021-02-19 20:21:31,638 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-02-19 20:21:31,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2021-02-19 20:21:31,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 1398. [2021-02-19 20:21:31,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 1397 states have (on average 2.0544022906227632) internal successors, (2870), 1397 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2870 transitions. [2021-02-19 20:21:31,649 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2870 transitions. Word has length 64 [2021-02-19 20:21:31,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:21:31,655 INFO L480 AbstractCegarLoop]: Abstraction has 1398 states and 2870 transitions. [2021-02-19 20:21:31,655 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 30 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:31,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2870 transitions. [2021-02-19 20:21:31,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-02-19 20:21:31,656 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:21:31,656 INFO L506 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:21:31,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 20:21:31,862 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:21:31,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:21:31,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1521920842, now seen corresponding path program 49 times [2021-02-19 20:21:31,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:21:31,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634941112] [2021-02-19 20:21:31,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:21:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:21:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:21:36,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634941112] [2021-02-19 20:21:36,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089039511] [2021-02-19 20:21:36,637 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:21:36,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:21:36,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 115 conjunts are in the unsatisfiable core [2021-02-19 20:21:36,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:21:37,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:21:37,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:21:37,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:21:37,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:21:37,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:21:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 812 backedges. 0 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:21:37,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:21:37,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2021-02-19 20:21:37,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403822634] [2021-02-19 20:21:37,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-02-19 20:21:37,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:21:37,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-02-19 20:21:37,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 20:21:37,207 INFO L87 Difference]: Start difference. First operand 1398 states and 2870 transitions. Second operand has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:43,164 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-02-19 20:21:43,475 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-02-19 20:21:43,780 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-02-19 20:21:44,089 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-02-19 20:21:44,401 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-02-19 20:21:44,751 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-02-19 20:21:45,118 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-02-19 20:21:45,560 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-02-19 20:21:45,765 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-02-19 20:21:45,960 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-02-19 20:21:46,158 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-02-19 20:21:50,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:21:50,300 INFO L93 Difference]: Finished difference Result 2847 states and 5627 transitions. [2021-02-19 20:21:50,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-02-19 20:21:50,303 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-02-19 20:21:50,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:21:50,307 INFO L225 Difference]: With dead ends: 2847 [2021-02-19 20:21:50,307 INFO L226 Difference]: Without dead ends: 1807 [2021-02-19 20:21:50,308 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=1851, Invalid=11259, Unknown=0, NotChecked=0, Total=13110 [2021-02-19 20:21:50,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1807 states. [2021-02-19 20:21:50,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1807 to 156. [2021-02-19 20:21:50,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.9741935483870967) internal successors, (306), 155 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:50,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 306 transitions. [2021-02-19 20:21:50,316 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 306 transitions. Word has length 65 [2021-02-19 20:21:50,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:21:50,317 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 306 transitions. [2021-02-19 20:21:50,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:50,317 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 306 transitions. [2021-02-19 20:21:50,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-02-19 20:21:50,317 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:21:50,318 INFO L506 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:21:50,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:21:50,539 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:21:50,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:21:50,539 INFO L82 PathProgramCache]: Analyzing trace with hash 88164885, now seen corresponding path program 50 times [2021-02-19 20:21:50,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:21:50,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660783115] [2021-02-19 20:21:50,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:21:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:21:51,752 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:21:51,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660783115] [2021-02-19 20:21:51,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733939905] [2021-02-19 20:21:51,753 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:21:51,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 20:21:51,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:21:51,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 20:21:51,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:21:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 435 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:21:52,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:21:52,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 31 [2021-02-19 20:21:52,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823242892] [2021-02-19 20:21:52,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 20:21:52,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:21:52,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 20:21:52,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:21:52,406 INFO L87 Difference]: Start difference. First operand 156 states and 306 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:52,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:21:52,653 INFO L93 Difference]: Finished difference Result 1724 states and 3349 transitions. [2021-02-19 20:21:52,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-02-19 20:21:52,656 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-02-19 20:21:52,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:21:52,658 INFO L225 Difference]: With dead ends: 1724 [2021-02-19 20:21:52,658 INFO L226 Difference]: Without dead ends: 1665 [2021-02-19 20:21:52,658 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-02-19 20:21:52,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1665 states. [2021-02-19 20:21:52,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1665 to 1491. [2021-02-19 20:21:52,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1491 states, 1490 states have (on average 2.0530201342281877) internal successors, (3059), 1490 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:52,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1491 states to 1491 states and 3059 transitions. [2021-02-19 20:21:52,671 INFO L78 Accepts]: Start accepts. Automaton has 1491 states and 3059 transitions. Word has length 66 [2021-02-19 20:21:52,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:21:52,672 INFO L480 AbstractCegarLoop]: Abstraction has 1491 states and 3059 transitions. [2021-02-19 20:21:52,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:21:52,672 INFO L276 IsEmpty]: Start isEmpty. Operand 1491 states and 3059 transitions. [2021-02-19 20:21:52,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-02-19 20:21:52,673 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:21:52,673 INFO L506 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:21:52,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:21:52,873 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:21:52,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:21:52,874 INFO L82 PathProgramCache]: Analyzing trace with hash 630737026, now seen corresponding path program 51 times [2021-02-19 20:21:52,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:21:52,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712137972] [2021-02-19 20:21:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:21:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:21:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:21:58,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712137972] [2021-02-19 20:21:58,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771463320] [2021-02-19 20:21:58,545 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 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 [2021-02-19 20:21:58,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-02-19 20:21:58,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:21:58,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 119 conjunts are in the unsatisfiable core [2021-02-19 20:21:58,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:21:59,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:21:59,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:21:59,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:21:59,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:21:59,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 20:21:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 870 backedges. 0 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:21:59,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:21:59,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2021-02-19 20:21:59,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805020964] [2021-02-19 20:21:59,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-02-19 20:21:59,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:21:59,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-02-19 20:21:59,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 20:21:59,168 INFO L87 Difference]: Start difference. First operand 1491 states and 3059 transitions. Second operand has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:05,248 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-02-19 20:22:05,572 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-02-19 20:22:05,910 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-02-19 20:22:06,266 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-02-19 20:22:06,639 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-02-19 20:22:07,002 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-02-19 20:22:07,381 WARN L202 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-02-19 20:22:07,750 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-02-19 20:22:08,113 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-02-19 20:22:08,567 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-02-19 20:22:08,783 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-02-19 20:22:09,012 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-02-19 20:22:09,230 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-02-19 20:22:09,446 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-02-19 20:22:09,668 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-02-19 20:22:14,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:22:14,234 INFO L93 Difference]: Finished difference Result 3035 states and 6001 transitions. [2021-02-19 20:22:14,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 20:22:14,237 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-02-19 20:22:14,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:22:14,239 INFO L225 Difference]: With dead ends: 3035 [2021-02-19 20:22:14,239 INFO L226 Difference]: Without dead ends: 1929 [2021-02-19 20:22:14,239 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=1975, Invalid=12067, Unknown=0, NotChecked=0, Total=14042 [2021-02-19 20:22:14,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-02-19 20:22:14,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 161. [2021-02-19 20:22:14,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.975) internal successors, (316), 160 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:14,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 316 transitions. [2021-02-19 20:22:14,246 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 316 transitions. Word has length 67 [2021-02-19 20:22:14,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:22:14,246 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 316 transitions. [2021-02-19 20:22:14,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:14,246 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 316 transitions. [2021-02-19 20:22:14,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-02-19 20:22:14,247 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:14,247 INFO L506 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:14,447 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-02-19 20:22:14,447 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:14,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:14,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1898917943, now seen corresponding path program 52 times [2021-02-19 20:22:14,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:14,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304060923] [2021-02-19 20:22:14,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:15,803 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:15,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304060923] [2021-02-19 20:22:15,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341969260] [2021-02-19 20:22:15,803 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 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 [2021-02-19 20:22:15,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 20:22:15,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:22:15,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 60 conjunts are in the unsatisfiable core [2021-02-19 20:22:15,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:22:16,568 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 465 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:16,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:22:16,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 32 [2021-02-19 20:22:16,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786987299] [2021-02-19 20:22:16,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 20:22:16,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:16,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 20:22:16,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:22:16,569 INFO L87 Difference]: Start difference. First operand 161 states and 316 transitions. Second operand has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:16,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 20:22:16,840 INFO L93 Difference]: Finished difference Result 1828 states and 3554 transitions. [2021-02-19 20:22:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 20:22:16,843 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-02-19 20:22:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 20:22:16,845 INFO L225 Difference]: With dead ends: 1828 [2021-02-19 20:22:16,845 INFO L226 Difference]: Without dead ends: 1767 [2021-02-19 20:22:16,845 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 20:22:16,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-02-19 20:22:16,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1587. [2021-02-19 20:22:16,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1587 states, 1586 states have (on average 2.051702395964691) internal successors, (3254), 1586 states have internal predecessors, (3254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:16,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1587 states to 1587 states and 3254 transitions. [2021-02-19 20:22:16,864 INFO L78 Accepts]: Start accepts. Automaton has 1587 states and 3254 transitions. Word has length 68 [2021-02-19 20:22:16,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 20:22:16,864 INFO L480 AbstractCegarLoop]: Abstraction has 1587 states and 3254 transitions. [2021-02-19 20:22:16,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:16,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1587 states and 3254 transitions. [2021-02-19 20:22:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-02-19 20:22:16,866 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 20:22:16,866 INFO L506 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 20:22:17,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 20:22:17,078 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 20:22:17,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 20:22:17,079 INFO L82 PathProgramCache]: Analyzing trace with hash -178133258, now seen corresponding path program 53 times [2021-02-19 20:22:17,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 20:22:17,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108519193] [2021-02-19 20:22:17,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 20:22:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 20:22:23,330 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 0 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:23,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108519193] [2021-02-19 20:22:23,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314052583] [2021-02-19 20:22:23,330 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 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 [2021-02-19 20:22:23,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-02-19 20:22:23,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 20:22:23,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 66 conjunts are in the unsatisfiable core [2021-02-19 20:22:23,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 20:22:39,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 20:22:39,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 20:22:39,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 20:22:39,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 20:22:39,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 20:22:39,712 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:19, output treesize:3 [2021-02-19 20:22:39,747 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 435 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 20:22:39,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 20:22:39,748 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 122 [2021-02-19 20:22:39,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704601929] [2021-02-19 20:22:39,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 123 states [2021-02-19 20:22:39,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 20:22:39,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-02-19 20:22:39,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2013, Invalid=12993, Unknown=0, NotChecked=0, Total=15006 [2021-02-19 20:22:39,749 INFO L87 Difference]: Start difference. First operand 1587 states and 3254 transitions. Second operand has 123 states, 123 states have (on average 1.08130081300813) internal successors, (133), 122 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 20:22:43,216 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2021-02-19 20:22:44,277 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-02-19 20:22:44,826 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2021-02-19 20:22:45,440 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2021-02-19 20:22:45,990 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2021-02-19 20:22:46,510 WARN L202 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 60 [2021-02-19 20:22:47,046 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 69 [2021-02-19 20:22:47,591 WARN L202 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2021-02-19 20:22:48,111 WARN L202 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2021-02-19 20:22:48,652 WARN L202 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 76 [2021-02-19 20:22:49,204 WARN L202 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 85 [2021-02-19 20:22:49,742 WARN L202 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2021-02-19 20:22:50,352 WARN L202 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2021-02-19 20:22:51,005 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 97 [2021-02-19 20:22:51,650 WARN L202 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 96 [2021-02-19 20:22:52,325 WARN L202 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 105 [2021-02-19 20:22:53,044 WARN L202 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 109 [2021-02-19 20:22:53,682 WARN L202 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 113 [2021-02-19 20:22:54,334 WARN L202 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 117 [2021-02-19 20:22:54,984 WARN L202 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 121 [2021-02-19 20:22:55,671 WARN L202 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 125 [2021-02-19 20:22:56,343 WARN L202 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 129 [2021-02-19 20:22:56,857 WARN L202 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2021-02-19 20:22:57,311 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2021-02-19 20:22:57,772 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2021-02-19 20:22:58,115 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2021-02-19 20:22:58,574 WARN L202 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2021-02-19 20:22:58,955 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2021-02-19 20:22:59,306 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2021-02-19 20:22:59,713 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-02-19 20:23:00,131 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2021-02-19 20:23:00,464 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 111 [2021-02-19 20:23:00,870 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2021-02-19 20:23:01,270 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-02-19 20:23:01,716 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2021-02-19 20:23:02,114 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2021-02-19 20:23:02,536 WARN L202 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-02-19 20:23:02,926 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-02-19 20:23:03,327 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2021-02-19 20:23:03,693 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-02-19 20:23:04,105 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2021-02-19 20:23:04,528 WARN L202 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-02-19 20:23:04,917 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-02-19 20:23:05,340 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-02-19 20:23:05,679 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2021-02-19 20:23:06,095 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-02-19 20:23:06,481 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-02-19 20:23:06,849 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-02-19 20:23:07,232 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2021-02-19 20:23:07,576 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2021-02-19 20:23:08,007 WARN L202 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2021-02-19 20:23:08,395 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-02-19 20:23:08,772 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-02-19 20:23:09,152 WARN L202 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-02-19 20:23:09,560 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 100 [2021-02-19 20:23:09,913 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-02-19 20:23:10,330 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-02-19 20:23:10,723 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-02-19 20:23:11,098 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-02-19 20:23:11,451 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-02-19 20:23:11,835 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2021-02-19 20:23:12,215 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 87 [2021-02-19 20:23:12,668 WARN L202 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2021-02-19 20:23:13,084 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-02-19 20:23:13,492 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-02-19 20:23:13,878 WARN L202 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-02-19 20:23:14,253 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-02-19 20:23:14,666 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2021-02-19 20:23:15,046 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2021-02-19 20:23:15,509 WARN L202 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-02-19 20:23:15,930 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-02-19 20:23:16,333 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-02-19 20:23:16,723 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-02-19 20:23:17,101 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-02-19 20:23:17,511 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2021-02-19 20:23:17,893 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2021-02-19 20:23:18,359 WARN L202 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2021-02-19 20:23:18,788 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-02-19 20:23:19,191 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-02-19 20:23:19,587 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-02-19 20:23:19,961 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-02-19 20:23:20,311 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-02-19 20:23:20,678 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2021-02-19 20:23:21,497 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-02-19 20:23:21,951 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-02-19 20:23:22,386 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-02-19 20:23:22,795 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-02-19 20:23:23,173 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-02-19 20:23:23,535 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 20:23:23,910 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2021-02-19 20:23:24,750 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 106 [2021-02-19 20:23:25,212 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-02-19 20:23:25,653 WARN L202 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-02-19 20:23:26,064 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-02-19 20:23:26,464 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-02-19 20:23:26,854 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 20:23:27,210 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-02-19 20:23:27,597 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2021-02-19 20:23:28,463 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-02-19 20:23:28,929 WARN L202 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-02-19 20:23:29,345 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-02-19 20:23:29,754 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-02-19 20:23:30,156 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 20:23:30,538 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-02-19 20:23:32,152 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2021-02-19 20:23:32,637 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-02-19 20:23:33,086 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-02-19 20:23:33,496 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-02-19 20:23:33,886 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 20:23:34,256 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-02-19 20:23:34,615 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:23:36,256 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-02-19 20:23:36,746 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-02-19 20:23:37,189 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-02-19 20:23:37,609 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 20:23:38,008 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-02-19 20:23:38,381 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:23:38,756 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:23:40,430 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2021-02-19 20:23:40,977 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-02-19 20:23:41,455 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-02-19 20:23:41,912 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 20:23:42,344 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-02-19 20:23:42,766 WARN L202 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:23:43,164 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:23:43,869 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 20:23:45,223 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-02-19 20:23:45,764 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-02-19 20:23:46,290 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 20:23:46,778 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-02-19 20:23:47,238 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:23:47,658 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:23:50,212 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2021-02-19 20:23:50,823 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-02-19 20:23:51,386 WARN L202 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 20:23:51,879 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-02-19 20:23:52,352 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:23:52,790 WARN L202 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:23:55,554 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-02-19 20:23:56,095 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 20:23:56,590 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-02-19 20:23:57,060 WARN L202 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:24:00,689 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 90 [2021-02-19 20:24:01,300 WARN L202 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 20:24:01,856 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-02-19 20:24:02,404 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:24:02,909 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:24:03,392 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 20:24:06,721 WARN L202 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 20:24:07,358 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-02-19 20:24:07,923 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:24:08,466 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:24:08,966 WARN L202 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 20:24:09,432 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 20:24:09,874 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 20:24:12,863 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2021-02-19 20:24:13,538 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-02-19 20:24:14,128 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:24:14,684 WARN L202 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:24:19,287 WARN L202 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-02-19 20:24:19,951 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:24:20,548 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:24:21,105 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 20:24:25,820 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2021-02-19 20:24:26,492 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:24:27,131 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:24:27,762 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 20:24:28,340 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 20:24:33,375 WARN L202 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:24:34,149 WARN L202 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:24:34,813 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 20:24:35,429 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 20:24:41,050 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2021-02-19 20:24:41,841 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:24:42,568 WARN L202 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 20:24:43,253 WARN L202 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 20:24:49,147 WARN L202 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:24:49,871 WARN L202 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 20:24:51,159 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 20:24:56,957 WARN L202 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 74 [2021-02-19 20:24:57,822 WARN L202 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 20:24:58,655 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 20:24:59,419 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 20:25:00,156 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-02-19 20:25:06,149 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 20:25:07,022 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 20:25:07,809 WARN L202 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 20:25:14,634 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2021-02-19 20:25:15,452 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 20:25:31,935 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-02-19 20:25:32,943 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-02-19 20:25:33,839 WARN L202 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2021-02-19 20:25:40,886 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 62 Received shutdown request... [2021-02-19 20:26:36,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 465 states. [2021-02-19 20:26:37,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-02-19 20:26:37,024 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 20:26:37,027 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 20:26:37,027 INFO L202 PluginConnector]: Adding new model simple-queue-L64.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 08:26:37 BasicIcfg [2021-02-19 20:26:37,027 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 20:26:37,028 INFO L168 Benchmark]: Toolchain (without parser) took 542514.83 ms. Allocated memory was 255.9 MB in the beginning and 364.9 MB in the end (delta: 109.1 MB). Free memory was 236.5 MB in the beginning and 178.7 MB in the end (delta: 57.9 MB). Peak memory consumption was 167.5 MB. Max. memory is 16.0 GB. [2021-02-19 20:26:37,028 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 92.7 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 20:26:37,028 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.01 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 20:26:37,028 INFO L168 Benchmark]: Boogie Preprocessor took 17.23 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.6 MB in the end (delta: 928.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 20:26:37,028 INFO L168 Benchmark]: RCFGBuilder took 277.15 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 237.6 MB in the end (delta: -4.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. [2021-02-19 20:26:37,028 INFO L168 Benchmark]: TraceAbstraction took 542185.31 ms. Allocated memory was 255.9 MB in the beginning and 364.9 MB in the end (delta: 109.1 MB). Free memory was 237.1 MB in the beginning and 178.7 MB in the end (delta: 58.4 MB). Peak memory consumption was 166.4 MB. Max. memory is 16.0 GB. [2021-02-19 20:26:37,029 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 255.9 MB. Free memory was 237.6 MB in the beginning and 237.5 MB in the end (delta: 92.7 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.01 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 17.23 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.6 MB in the end (delta: 928.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 277.15 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 237.6 MB in the end (delta: -4.1 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 542185.31 ms. Allocated memory was 255.9 MB in the beginning and 364.9 MB in the end (delta: 109.1 MB). Free memory was 237.1 MB in the beginning and 178.7 MB in the end (delta: 58.4 MB). Peak memory consumption was 166.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 45). Cancelled while BasicCegarLoop was constructing difference of abstraction (1587states) and FLOYD_HOARE automaton (currently 465 states, 123 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 577 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 542.0s, OverallIterations: 55, TraceHistogramMax: 30, AutomataDifference: 436.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4524 SDtfs, 49376 SDslu, 115064 SDs, 0 SdLazy, 36567 SolverSat, 15191 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 36.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5805 GetRequests, 2309 SyntacticMatches, 45 SemanticMatches, 3450 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205908 ImplicationChecksByTransitivity, 437.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1587occurred in iteration=54, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 54 MinimizatonAttempts, 26018 StatesRemovedByMinimization, 51 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 90.7s InterpolantComputationTime, 4371 NumberOfCodeBlocks, 4371 NumberOfCodeBlocksAsserted, 339 NumberOfCheckSat, 4263 ConstructedInterpolants, 114 QuantifiedInterpolants, 1320435 SizeOfPredicates, 37 NumberOfNonLiveVariables, 8823 ConjunctsInSsa, 2618 ConjunctsInUnsatCore, 108 InterpolantComputations, 2 PerfectInterpolantSequences, 9586/36945 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