/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 00:11:26,097 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 00:11:26,099 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 00:11:26,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 00:11:26,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-11 00:11:26,336 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 00:11:26,336 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 00:11:26,337 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-11 00:11:26,337 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-11 00:11:26,338 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 00:11:26,338 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 00:11:26,338 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 00:11:26,338 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 00:11:26,339 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 00:11:26,339 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 00:11:26,339 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 00:11:26,339 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 00:11:26,339 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 00:11:26,339 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 00:11:26,339 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 00:11:26,340 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 00:11:26,340 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 00:11:26,340 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 00:11:26,340 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 00:11:26,340 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 00:11:26,340 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 00:11:26,340 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 00:11:26,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 00:11:26,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:11:26,341 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 00:11:26,341 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 00:11:26,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 00:11:26,341 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 00:11:26,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 00:11:26,342 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 00:11:26,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-11 00:11:26,342 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 00:11:26,627 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 00:11:26,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 00:11:26,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 00:11:26,647 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 00:11:26,655 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 00:11:26,656 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl [2021-03-11 00:11:26,656 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl' [2021-03-11 00:11:26,783 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 00:11:26,788 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 00:11:26,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 00:11:26,789 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 00:11:26,789 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 00:11:26,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:11:26" (1/1) ... [2021-03-11 00:11:26,809 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:11:26" (1/1) ... [2021-03-11 00:11:26,815 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 00:11:26,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 00:11:26,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 00:11:26,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 00:11:26,824 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:11:26" (1/1) ... [2021-03-11 00:11:26,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:11:26" (1/1) ... [2021-03-11 00:11:26,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:11:26" (1/1) ... [2021-03-11 00:11:26,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:11:26" (1/1) ... [2021-03-11 00:11:26,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:11:26" (1/1) ... [2021-03-11 00:11:26,831 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:11:26" (1/1) ... [2021-03-11 00:11:26,832 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:11:26" (1/1) ... [2021-03-11 00:11:26,832 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 00:11:26,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 00:11:26,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 00:11:26,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 00:11:26,835 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:11:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 00:11:26,903 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 00:11:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 00:11:26,903 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 00:11:26,903 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 00:11:26,903 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 00:11:26,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 00:11:26,904 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 00:11:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 00:11:26,904 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 00:11:26,904 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 00:11:26,904 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 00:11:26,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 00:11:26,905 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 00:11:27,130 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 00:11:27,131 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 00:11:27,132 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:11:27 BoogieIcfgContainer [2021-03-11 00:11:27,132 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 00:11:27,134 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 00:11:27,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 00:11:27,136 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 00:11:27,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 12:11:26" (1/2) ... [2021-03-11 00:11:27,137 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50b35fc3 and model type multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 12:11:27, skipping insertion in model container [2021-03-11 00:11:27,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 12:11:27" (2/2) ... [2021-03-11 00:11:27,138 INFO L111 eAbstractionObserver]: Analyzing ICFG multiply-verify.wvr.bpl [2021-03-11 00:11:27,142 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-11 00:11:27,143 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 00:11:27,163 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 00:11:27,163 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 00:11:27,191 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 00:11:27,205 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 00:11:27,221 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 00:11:27,221 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-11 00:11:27,221 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 00:11:27,221 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 00:11:27,221 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 00:11:27,221 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 00:11:27,221 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 00:11:27,221 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 00:11:27,229 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 90 flow [2021-03-11 00:11:27,287 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 371 states, 369 states have (on average 2.747967479674797) internal successors, (1014), 370 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 371 states, 369 states have (on average 2.747967479674797) internal successors, (1014), 370 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:27,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:11:27,323 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:27,324 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:27,325 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:27,330 INFO L82 PathProgramCache]: Analyzing trace with hash -894934944, now seen corresponding path program 1 times [2021-03-11 00:11:27,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:27,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039401907] [2021-03-11 00:11:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:27,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039401907] [2021-03-11 00:11:27,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:11:27,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 00:11:27,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448396321] [2021-03-11 00:11:27,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:11:27,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:27,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:11:27,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:11:27,699 INFO L87 Difference]: Start difference. First operand has 371 states, 369 states have (on average 2.747967479674797) internal successors, (1014), 370 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:27,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:27,845 INFO L93 Difference]: Finished difference Result 349 states and 846 transitions. [2021-03-11 00:11:27,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:11:27,846 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:11:27,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:27,866 INFO L225 Difference]: With dead ends: 349 [2021-03-11 00:11:27,867 INFO L226 Difference]: Without dead ends: 311 [2021-03-11 00:11:27,869 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:27,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-03-11 00:11:27,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 293. [2021-03-11 00:11:27,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.482876712328767) internal successors, (725), 292 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 725 transitions. [2021-03-11 00:11:27,932 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 725 transitions. Word has length 22 [2021-03-11 00:11:27,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:27,933 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 725 transitions. [2021-03-11 00:11:27,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:27,933 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 725 transitions. [2021-03-11 00:11:27,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:11:27,936 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:27,936 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:27,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 00:11:27,936 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:27,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:27,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1198566966, now seen corresponding path program 2 times [2021-03-11 00:11:27,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:27,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871418676] [2021-03-11 00:11:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:27,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:28,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871418676] [2021-03-11 00:11:28,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:11:28,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 00:11:28,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749250133] [2021-03-11 00:11:28,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:11:28,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:28,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:11:28,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:11:28,046 INFO L87 Difference]: Start difference. First operand 293 states and 725 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:28,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:28,114 INFO L93 Difference]: Finished difference Result 333 states and 800 transitions. [2021-03-11 00:11:28,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:11:28,114 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:11:28,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:28,117 INFO L225 Difference]: With dead ends: 333 [2021-03-11 00:11:28,117 INFO L226 Difference]: Without dead ends: 296 [2021-03-11 00:11:28,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:28,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-03-11 00:11:28,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 220. [2021-03-11 00:11:28,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.3926940639269407) internal successors, (524), 219 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:28,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 524 transitions. [2021-03-11 00:11:28,133 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 524 transitions. Word has length 22 [2021-03-11 00:11:28,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:28,133 INFO L480 AbstractCegarLoop]: Abstraction has 220 states and 524 transitions. [2021-03-11 00:11:28,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 524 transitions. [2021-03-11 00:11:28,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:11:28,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:28,136 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:28,136 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 00:11:28,136 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:28,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:28,137 INFO L82 PathProgramCache]: Analyzing trace with hash -602461050, now seen corresponding path program 3 times [2021-03-11 00:11:28,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:28,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800243028] [2021-03-11 00:11:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:28,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800243028] [2021-03-11 00:11:28,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:11:28,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 00:11:28,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824908636] [2021-03-11 00:11:28,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:11:28,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:28,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:11:28,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:11:28,231 INFO L87 Difference]: Start difference. First operand 220 states and 524 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:28,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:28,315 INFO L93 Difference]: Finished difference Result 320 states and 768 transitions. [2021-03-11 00:11:28,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:11:28,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:11:28,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:28,317 INFO L225 Difference]: With dead ends: 320 [2021-03-11 00:11:28,317 INFO L226 Difference]: Without dead ends: 280 [2021-03-11 00:11:28,318 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:28,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-03-11 00:11:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 218. [2021-03-11 00:11:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.3824884792626726) internal successors, (517), 217 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 517 transitions. [2021-03-11 00:11:28,329 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 517 transitions. Word has length 22 [2021-03-11 00:11:28,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:28,329 INFO L480 AbstractCegarLoop]: Abstraction has 218 states and 517 transitions. [2021-03-11 00:11:28,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 517 transitions. [2021-03-11 00:11:28,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:11:28,330 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:28,331 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:28,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 00:11:28,331 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:28,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:28,332 INFO L82 PathProgramCache]: Analyzing trace with hash -630863238, now seen corresponding path program 4 times [2021-03-11 00:11:28,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:28,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540673573] [2021-03-11 00:11:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:28,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:28,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540673573] [2021-03-11 00:11:28,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:11:28,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 00:11:28,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867833966] [2021-03-11 00:11:28,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:11:28,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:28,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:11:28,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:11:28,484 INFO L87 Difference]: Start difference. First operand 218 states and 517 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:28,536 INFO L93 Difference]: Finished difference Result 327 states and 775 transitions. [2021-03-11 00:11:28,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:11:28,537 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:11:28,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:28,539 INFO L225 Difference]: With dead ends: 327 [2021-03-11 00:11:28,539 INFO L226 Difference]: Without dead ends: 290 [2021-03-11 00:11:28,539 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:28,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-03-11 00:11:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 226. [2021-03-11 00:11:28,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.3866666666666667) internal successors, (537), 225 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:28,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 537 transitions. [2021-03-11 00:11:28,549 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 537 transitions. Word has length 22 [2021-03-11 00:11:28,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:28,549 INFO L480 AbstractCegarLoop]: Abstraction has 226 states and 537 transitions. [2021-03-11 00:11:28,549 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:28,550 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 537 transitions. [2021-03-11 00:11:28,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:11:28,550 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:28,551 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:28,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 00:11:28,551 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:28,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:28,551 INFO L82 PathProgramCache]: Analyzing trace with hash -2144128130, now seen corresponding path program 5 times [2021-03-11 00:11:28,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:28,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134783907] [2021-03-11 00:11:28,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:28,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134783907] [2021-03-11 00:11:28,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:11:28,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 00:11:28,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978451436] [2021-03-11 00:11:28,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:11:28,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:28,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:11:28,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:11:28,636 INFO L87 Difference]: Start difference. First operand 226 states and 537 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:28,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:28,707 INFO L93 Difference]: Finished difference Result 333 states and 810 transitions. [2021-03-11 00:11:28,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:11:28,707 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:11:28,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:28,711 INFO L225 Difference]: With dead ends: 333 [2021-03-11 00:11:28,711 INFO L226 Difference]: Without dead ends: 296 [2021-03-11 00:11:28,712 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:28,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-03-11 00:11:28,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 242. [2021-03-11 00:11:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.4356846473029043) internal successors, (587), 241 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 587 transitions. [2021-03-11 00:11:28,722 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 587 transitions. Word has length 22 [2021-03-11 00:11:28,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:28,722 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 587 transitions. [2021-03-11 00:11:28,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:28,722 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 587 transitions. [2021-03-11 00:11:28,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-11 00:11:28,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:28,723 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:28,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 00:11:28,724 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:28,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:28,724 INFO L82 PathProgramCache]: Analyzing trace with hash 909995578, now seen corresponding path program 6 times [2021-03-11 00:11:28,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:28,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198824560] [2021-03-11 00:11:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:28,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:28,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198824560] [2021-03-11 00:11:28,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:11:28,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-03-11 00:11:28,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778571506] [2021-03-11 00:11:28,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-11 00:11:28,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:28,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-11 00:11:28,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:11:28,900 INFO L87 Difference]: Start difference. First operand 242 states and 587 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:28,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:28,969 INFO L93 Difference]: Finished difference Result 337 states and 817 transitions. [2021-03-11 00:11:28,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:11:28,970 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-11 00:11:28,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:28,973 INFO L225 Difference]: With dead ends: 337 [2021-03-11 00:11:28,974 INFO L226 Difference]: Without dead ends: 297 [2021-03-11 00:11:28,974 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 73.3ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:28,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-03-11 00:11:28,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 224. [2021-03-11 00:11:28,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.3856502242152464) internal successors, (532), 223 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:28,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 532 transitions. [2021-03-11 00:11:28,985 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 532 transitions. Word has length 22 [2021-03-11 00:11:28,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:28,986 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 532 transitions. [2021-03-11 00:11:28,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:28,986 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 532 transitions. [2021-03-11 00:11:28,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:11:28,987 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:28,987 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:28,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 00:11:28,987 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:28,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:28,988 INFO L82 PathProgramCache]: Analyzing trace with hash 2086549228, now seen corresponding path program 1 times [2021-03-11 00:11:28,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:28,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412512924] [2021-03-11 00:11:28,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:29,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412512924] [2021-03-11 00:11:29,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659157679] [2021-03-11 00:11:29,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:29,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:29,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-11 00:11:29,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:29,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:29,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-11 00:11:29,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829623820] [2021-03-11 00:11:29,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 00:11:29,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:29,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 00:11:29,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:11:29,223 INFO L87 Difference]: Start difference. First operand 224 states and 532 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:29,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:29,315 INFO L93 Difference]: Finished difference Result 342 states and 809 transitions. [2021-03-11 00:11:29,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:11:29,316 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:11:29,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:29,318 INFO L225 Difference]: With dead ends: 342 [2021-03-11 00:11:29,318 INFO L226 Difference]: Without dead ends: 342 [2021-03-11 00:11:29,318 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 70.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-03-11 00:11:29,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 213. [2021-03-11 00:11:29,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.4245283018867925) internal successors, (514), 212 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:29,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 514 transitions. [2021-03-11 00:11:29,326 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 514 transitions. Word has length 25 [2021-03-11 00:11:29,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:29,327 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 514 transitions. [2021-03-11 00:11:29,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:29,327 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 514 transitions. [2021-03-11 00:11:29,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:11:29,328 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:29,328 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:29,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-03-11 00:11:29,551 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:29,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:29,552 INFO L82 PathProgramCache]: Analyzing trace with hash 785545354, now seen corresponding path program 1 times [2021-03-11 00:11:29,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:29,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925851285] [2021-03-11 00:11:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:29,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925851285] [2021-03-11 00:11:29,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:11:29,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:11:29,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716133281] [2021-03-11 00:11:29,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:11:29,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:29,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:11:29,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:11:29,585 INFO L87 Difference]: Start difference. First operand 213 states and 514 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:29,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:29,647 INFO L93 Difference]: Finished difference Result 361 states and 847 transitions. [2021-03-11 00:11:29,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:11:29,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:11:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:29,650 INFO L225 Difference]: With dead ends: 361 [2021-03-11 00:11:29,650 INFO L226 Difference]: Without dead ends: 337 [2021-03-11 00:11:29,650 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:11:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-03-11 00:11:29,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 213. [2021-03-11 00:11:29,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.400943396226415) internal successors, (509), 212 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:29,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 509 transitions. [2021-03-11 00:11:29,658 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 509 transitions. Word has length 25 [2021-03-11 00:11:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:29,658 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 509 transitions. [2021-03-11 00:11:29,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 509 transitions. [2021-03-11 00:11:29,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:11:29,660 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:29,661 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:29,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 00:11:29,661 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:29,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:29,661 INFO L82 PathProgramCache]: Analyzing trace with hash 727801610, now seen corresponding path program 2 times [2021-03-11 00:11:29,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:29,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897239616] [2021-03-11 00:11:29,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:29,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897239616] [2021-03-11 00:11:29,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561906114] [2021-03-11 00:11:29,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:29,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:11:29,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:29,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-11 00:11:29,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:29,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:29,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-11 00:11:29,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748562122] [2021-03-11 00:11:29,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 00:11:29,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:29,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 00:11:29,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:11:29,890 INFO L87 Difference]: Start difference. First operand 213 states and 509 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:30,032 INFO L93 Difference]: Finished difference Result 495 states and 1157 transitions. [2021-03-11 00:11:30,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:11:30,032 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:11:30,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:30,034 INFO L225 Difference]: With dead ends: 495 [2021-03-11 00:11:30,035 INFO L226 Difference]: Without dead ends: 495 [2021-03-11 00:11:30,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 120.8ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:11:30,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-03-11 00:11:30,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 221. [2021-03-11 00:11:30,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.4318181818181817) internal successors, (535), 220 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 535 transitions. [2021-03-11 00:11:30,049 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 535 transitions. Word has length 25 [2021-03-11 00:11:30,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:30,050 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 535 transitions. [2021-03-11 00:11:30,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,050 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 535 transitions. [2021-03-11 00:11:30,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:11:30,051 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:30,051 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:30,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:30,252 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:30,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:30,252 INFO L82 PathProgramCache]: Analyzing trace with hash 517104564, now seen corresponding path program 2 times [2021-03-11 00:11:30,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:30,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015732419] [2021-03-11 00:11:30,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:30,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:30,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015732419] [2021-03-11 00:11:30,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:11:30,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:11:30,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911529730] [2021-03-11 00:11:30,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:11:30,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:30,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:11:30,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:11:30,295 INFO L87 Difference]: Start difference. First operand 221 states and 535 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:30,356 INFO L93 Difference]: Finished difference Result 341 states and 802 transitions. [2021-03-11 00:11:30,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 00:11:30,357 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:11:30,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:30,360 INFO L225 Difference]: With dead ends: 341 [2021-03-11 00:11:30,360 INFO L226 Difference]: Without dead ends: 335 [2021-03-11 00:11:30,360 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:11:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-03-11 00:11:30,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 245. [2021-03-11 00:11:30,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.4385245901639343) internal successors, (595), 244 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 595 transitions. [2021-03-11 00:11:30,368 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 595 transitions. Word has length 25 [2021-03-11 00:11:30,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:30,368 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 595 transitions. [2021-03-11 00:11:30,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,368 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 595 transitions. [2021-03-11 00:11:30,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:11:30,370 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:30,370 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:30,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-11 00:11:30,370 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:30,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:30,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1245856382, now seen corresponding path program 3 times [2021-03-11 00:11:30,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:30,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261270823] [2021-03-11 00:11:30,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:30,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261270823] [2021-03-11 00:11:30,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:11:30,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:11:30,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623262268] [2021-03-11 00:11:30,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:11:30,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:30,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:11:30,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:11:30,415 INFO L87 Difference]: Start difference. First operand 245 states and 595 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:30,479 INFO L93 Difference]: Finished difference Result 284 states and 686 transitions. [2021-03-11 00:11:30,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:11:30,479 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:11:30,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:30,481 INFO L225 Difference]: With dead ends: 284 [2021-03-11 00:11:30,481 INFO L226 Difference]: Without dead ends: 284 [2021-03-11 00:11:30,481 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:11:30,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-03-11 00:11:30,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 221. [2021-03-11 00:11:30,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.422727272727273) internal successors, (533), 220 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 533 transitions. [2021-03-11 00:11:30,489 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 533 transitions. Word has length 25 [2021-03-11 00:11:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:30,489 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 533 transitions. [2021-03-11 00:11:30,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 533 transitions. [2021-03-11 00:11:30,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:11:30,490 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:30,490 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:30,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-11 00:11:30,490 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:30,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:30,491 INFO L82 PathProgramCache]: Analyzing trace with hash 868885228, now seen corresponding path program 3 times [2021-03-11 00:11:30,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:30,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853081990] [2021-03-11 00:11:30,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:30,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853081990] [2021-03-11 00:11:30,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:11:30,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:11:30,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294568591] [2021-03-11 00:11:30,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:11:30,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:30,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:11:30,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:11:30,539 INFO L87 Difference]: Start difference. First operand 221 states and 533 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:30,613 INFO L93 Difference]: Finished difference Result 394 states and 930 transitions. [2021-03-11 00:11:30,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:11:30,614 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:11:30,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:30,616 INFO L225 Difference]: With dead ends: 394 [2021-03-11 00:11:30,616 INFO L226 Difference]: Without dead ends: 387 [2021-03-11 00:11:30,617 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:11:30,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-03-11 00:11:30,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 221. [2021-03-11 00:11:30,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.4136363636363636) internal successors, (531), 220 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 531 transitions. [2021-03-11 00:11:30,624 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 531 transitions. Word has length 25 [2021-03-11 00:11:30,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:30,625 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 531 transitions. [2021-03-11 00:11:30,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,626 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 531 transitions. [2021-03-11 00:11:30,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:11:30,626 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:30,627 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:30,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-11 00:11:30,627 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:30,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:30,627 INFO L82 PathProgramCache]: Analyzing trace with hash -241548014, now seen corresponding path program 4 times [2021-03-11 00:11:30,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:30,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478562009] [2021-03-11 00:11:30,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:30,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:30,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478562009] [2021-03-11 00:11:30,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481634314] [2021-03-11 00:11:30,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:30,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:11:30,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:30,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-11 00:11:30,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:30,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:30,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:30,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-03-11 00:11:30,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747074034] [2021-03-11 00:11:30,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 00:11:30,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:30,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 00:11:30,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-11 00:11:30,775 INFO L87 Difference]: Start difference. First operand 221 states and 531 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:30,868 INFO L93 Difference]: Finished difference Result 340 states and 811 transitions. [2021-03-11 00:11:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:11:30,869 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:11:30,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:30,871 INFO L225 Difference]: With dead ends: 340 [2021-03-11 00:11:30,871 INFO L226 Difference]: Without dead ends: 340 [2021-03-11 00:11:30,871 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:30,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-03-11 00:11:30,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 209. [2021-03-11 00:11:30,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4278846153846154) internal successors, (505), 208 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 505 transitions. [2021-03-11 00:11:30,877 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 505 transitions. Word has length 25 [2021-03-11 00:11:30,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:30,878 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 505 transitions. [2021-03-11 00:11:30,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:30,878 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 505 transitions. [2021-03-11 00:11:30,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:11:30,879 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:30,879 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:31,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-03-11 00:11:31,105 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:31,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:31,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1742404094, now seen corresponding path program 4 times [2021-03-11 00:11:31,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:31,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289793310] [2021-03-11 00:11:31,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:31,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:31,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289793310] [2021-03-11 00:11:31,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:11:31,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:11:31,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52568542] [2021-03-11 00:11:31,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:11:31,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:31,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:11:31,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:11:31,133 INFO L87 Difference]: Start difference. First operand 209 states and 505 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:31,183 INFO L93 Difference]: Finished difference Result 348 states and 822 transitions. [2021-03-11 00:11:31,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 00:11:31,184 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:11:31,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:31,185 INFO L225 Difference]: With dead ends: 348 [2021-03-11 00:11:31,185 INFO L226 Difference]: Without dead ends: 330 [2021-03-11 00:11:31,185 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 27.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:11:31,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-03-11 00:11:31,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 209. [2021-03-11 00:11:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4086538461538463) internal successors, (501), 208 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:31,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-03-11 00:11:31,192 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-03-11 00:11:31,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:31,193 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-03-11 00:11:31,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:31,193 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-03-11 00:11:31,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:11:31,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:31,194 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:31,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-03-11 00:11:31,194 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:31,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:31,194 INFO L82 PathProgramCache]: Analyzing trace with hash 2089386992, now seen corresponding path program 5 times [2021-03-11 00:11:31,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:31,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253771018] [2021-03-11 00:11:31,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:31,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253771018] [2021-03-11 00:11:31,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732222701] [2021-03-11 00:11:31,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:31,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:11:31,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:31,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-03-11 00:11:31,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:31,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:31,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-03-11 00:11:31,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890352553] [2021-03-11 00:11:31,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 00:11:31,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:31,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 00:11:31,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-03-11 00:11:31,336 INFO L87 Difference]: Start difference. First operand 209 states and 501 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:31,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:31,418 INFO L93 Difference]: Finished difference Result 379 states and 891 transitions. [2021-03-11 00:11:31,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-11 00:11:31,418 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:11:31,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:31,420 INFO L225 Difference]: With dead ends: 379 [2021-03-11 00:11:31,420 INFO L226 Difference]: Without dead ends: 379 [2021-03-11 00:11:31,422 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:11:31,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-03-11 00:11:31,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 209. [2021-03-11 00:11:31,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4086538461538463) internal successors, (501), 208 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-03-11 00:11:31,428 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-03-11 00:11:31,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:31,429 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-03-11 00:11:31,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:31,429 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-03-11 00:11:31,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:11:31,430 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:31,430 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:31,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:31,652 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:31,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:31,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1878689946, now seen corresponding path program 5 times [2021-03-11 00:11:31,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:31,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012227324] [2021-03-11 00:11:31,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:31,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012227324] [2021-03-11 00:11:31,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:11:31,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:11:31,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854359078] [2021-03-11 00:11:31,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:11:31,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:31,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:11:31,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:11:31,686 INFO L87 Difference]: Start difference. First operand 209 states and 501 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:31,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:31,750 INFO L93 Difference]: Finished difference Result 381 states and 892 transitions. [2021-03-11 00:11:31,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:11:31,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:11:31,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:31,753 INFO L225 Difference]: With dead ends: 381 [2021-03-11 00:11:31,753 INFO L226 Difference]: Without dead ends: 375 [2021-03-11 00:11:31,753 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:11:31,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-03-11 00:11:31,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 233. [2021-03-11 00:11:31,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.418103448275862) internal successors, (561), 232 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:31,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 561 transitions. [2021-03-11 00:11:31,761 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 561 transitions. Word has length 25 [2021-03-11 00:11:31,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:31,761 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 561 transitions. [2021-03-11 00:11:31,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:31,761 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 561 transitions. [2021-03-11 00:11:31,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:11:31,762 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:31,762 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:31,762 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-03-11 00:11:31,762 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:31,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:31,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1687525532, now seen corresponding path program 6 times [2021-03-11 00:11:31,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:31,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986559600] [2021-03-11 00:11:31,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:31,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:31,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986559600] [2021-03-11 00:11:31,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:11:31,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:11:31,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558884065] [2021-03-11 00:11:31,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:11:31,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:31,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:11:31,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:11:31,796 INFO L87 Difference]: Start difference. First operand 233 states and 561 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:31,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:31,853 INFO L93 Difference]: Finished difference Result 311 states and 744 transitions. [2021-03-11 00:11:31,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 00:11:31,853 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:11:31,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:31,855 INFO L225 Difference]: With dead ends: 311 [2021-03-11 00:11:31,855 INFO L226 Difference]: Without dead ends: 311 [2021-03-11 00:11:31,855 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:11:31,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-03-11 00:11:31,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 209. [2021-03-11 00:11:31,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.3990384615384617) internal successors, (499), 208 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:31,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 499 transitions. [2021-03-11 00:11:31,862 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 499 transitions. Word has length 25 [2021-03-11 00:11:31,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:31,862 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 499 transitions. [2021-03-11 00:11:31,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:31,862 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 499 transitions. [2021-03-11 00:11:31,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-11 00:11:31,863 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:31,863 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:31,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-03-11 00:11:31,863 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:31,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:31,863 INFO L82 PathProgramCache]: Analyzing trace with hash -2064496686, now seen corresponding path program 6 times [2021-03-11 00:11:31,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:31,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844579231] [2021-03-11 00:11:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:31,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844579231] [2021-03-11 00:11:31,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 00:11:31,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 00:11:31,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850777044] [2021-03-11 00:11:31,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 00:11:31,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:31,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 00:11:31,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 00:11:31,893 INFO L87 Difference]: Start difference. First operand 209 states and 499 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:31,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:31,940 INFO L93 Difference]: Finished difference Result 256 states and 607 transitions. [2021-03-11 00:11:31,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 00:11:31,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-11 00:11:31,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:31,941 INFO L225 Difference]: With dead ends: 256 [2021-03-11 00:11:31,941 INFO L226 Difference]: Without dead ends: 249 [2021-03-11 00:11:31,942 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-11 00:11:31,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-03-11 00:11:31,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 207. [2021-03-11 00:11:31,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.3883495145631066) internal successors, (492), 206 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 492 transitions. [2021-03-11 00:11:31,948 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 492 transitions. Word has length 25 [2021-03-11 00:11:31,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:31,949 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 492 transitions. [2021-03-11 00:11:31,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:31,949 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 492 transitions. [2021-03-11 00:11:31,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:11:31,949 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:31,949 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:31,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-03-11 00:11:31,950 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:31,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:31,950 INFO L82 PathProgramCache]: Analyzing trace with hash -2038135170, now seen corresponding path program 1 times [2021-03-11 00:11:31,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:31,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852964126] [2021-03-11 00:11:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:31,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:32,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852964126] [2021-03-11 00:11:32,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410479588] [2021-03-11 00:11:32,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:11:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:32,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:11:32,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:32,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:32,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2021-03-11 00:11:32,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32888451] [2021-03-11 00:11:32,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:11:32,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:32,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:11:32,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:11:32,259 INFO L87 Difference]: Start difference. First operand 207 states and 492 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:32,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:32,366 INFO L93 Difference]: Finished difference Result 387 states and 917 transitions. [2021-03-11 00:11:32,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:11:32,366 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:11:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:32,368 INFO L225 Difference]: With dead ends: 387 [2021-03-11 00:11:32,368 INFO L226 Difference]: Without dead ends: 349 [2021-03-11 00:11:32,369 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 131.0ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:11:32,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-03-11 00:11:32,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 246. [2021-03-11 00:11:32,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.3510204081632655) internal successors, (576), 245 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:32,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 576 transitions. [2021-03-11 00:11:32,375 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 576 transitions. Word has length 28 [2021-03-11 00:11:32,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:32,376 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 576 transitions. [2021-03-11 00:11:32,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:32,376 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 576 transitions. [2021-03-11 00:11:32,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:11:32,377 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:32,377 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:32,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:32,591 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:32,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:32,592 INFO L82 PathProgramCache]: Analyzing trace with hash -957499002, now seen corresponding path program 2 times [2021-03-11 00:11:32,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:32,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514490688] [2021-03-11 00:11:32,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:32,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:32,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:32,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514490688] [2021-03-11 00:11:32,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497138892] [2021-03-11 00:11:32,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:32,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:11:32,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:32,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-11 00:11:32,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:32,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:32,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-11 00:11:32,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349359235] [2021-03-11 00:11:32,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:11:32,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:32,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:11:32,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:11:32,847 INFO L87 Difference]: Start difference. First operand 246 states and 576 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:32,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:32,966 INFO L93 Difference]: Finished difference Result 496 states and 1252 transitions. [2021-03-11 00:11:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:11:32,966 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:11:32,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:32,968 INFO L225 Difference]: With dead ends: 496 [2021-03-11 00:11:32,968 INFO L226 Difference]: Without dead ends: 459 [2021-03-11 00:11:32,969 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:11:32,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-03-11 00:11:32,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 337. [2021-03-11 00:11:32,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.4791666666666665) internal successors, (833), 336 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:32,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 833 transitions. [2021-03-11 00:11:32,983 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 833 transitions. Word has length 28 [2021-03-11 00:11:32,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:32,983 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 833 transitions. [2021-03-11 00:11:32,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:32,983 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 833 transitions. [2021-03-11 00:11:32,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:11:32,984 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:32,984 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:33,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:33,195 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:33,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:33,196 INFO L82 PathProgramCache]: Analyzing trace with hash -361393086, now seen corresponding path program 3 times [2021-03-11 00:11:33,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:33,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060738465] [2021-03-11 00:11:33,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:33,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:33,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060738465] [2021-03-11 00:11:33,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621823085] [2021-03-11 00:11:33,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:33,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:11:33,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:33,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-11 00:11:33,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:33,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:33,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-11 00:11:33,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073581100] [2021-03-11 00:11:33,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:11:33,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:33,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:11:33,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:11:33,467 INFO L87 Difference]: Start difference. First operand 337 states and 833 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:33,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:33,582 INFO L93 Difference]: Finished difference Result 504 states and 1265 transitions. [2021-03-11 00:11:33,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:11:33,583 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:11:33,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:33,585 INFO L225 Difference]: With dead ends: 504 [2021-03-11 00:11:33,585 INFO L226 Difference]: Without dead ends: 462 [2021-03-11 00:11:33,585 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:11:33,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-03-11 00:11:33,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 331. [2021-03-11 00:11:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.4727272727272727) internal successors, (816), 330 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 816 transitions. [2021-03-11 00:11:33,595 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 816 transitions. Word has length 28 [2021-03-11 00:11:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:33,595 INFO L480 AbstractCegarLoop]: Abstraction has 331 states and 816 transitions. [2021-03-11 00:11:33,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:33,596 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 816 transitions. [2021-03-11 00:11:33,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:11:33,597 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:33,597 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:33,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:33,820 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:33,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:33,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1418916614, now seen corresponding path program 4 times [2021-03-11 00:11:33,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:33,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26878758] [2021-03-11 00:11:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:33,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:33,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26878758] [2021-03-11 00:11:33,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858809955] [2021-03-11 00:11:33,940 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:33,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:11:33,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:33,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:11:33,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:34,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:34,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2021-03-11 00:11:34,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906348117] [2021-03-11 00:11:34,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:11:34,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:34,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:11:34,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:11:34,102 INFO L87 Difference]: Start difference. First operand 331 states and 816 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:34,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:34,199 INFO L93 Difference]: Finished difference Result 519 states and 1295 transitions. [2021-03-11 00:11:34,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:11:34,200 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:11:34,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:34,202 INFO L225 Difference]: With dead ends: 519 [2021-03-11 00:11:34,202 INFO L226 Difference]: Without dead ends: 481 [2021-03-11 00:11:34,203 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:11:34,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-03-11 00:11:34,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 349. [2021-03-11 00:11:34,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.4913793103448274) internal successors, (867), 348 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 867 transitions. [2021-03-11 00:11:34,213 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 867 transitions. Word has length 28 [2021-03-11 00:11:34,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:34,213 INFO L480 AbstractCegarLoop]: Abstraction has 349 states and 867 transitions. [2021-03-11 00:11:34,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:34,213 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 867 transitions. [2021-03-11 00:11:34,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:11:34,214 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:34,214 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:34,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-11 00:11:34,437 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:34,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:34,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1124070530, now seen corresponding path program 5 times [2021-03-11 00:11:34,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:34,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388099793] [2021-03-11 00:11:34,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:34,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388099793] [2021-03-11 00:11:34,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179841277] [2021-03-11 00:11:34,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:34,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:11:34,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:34,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-11 00:11:34,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:34,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:34,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:34,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:11:34,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252501237] [2021-03-11 00:11:34,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:11:34,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:34,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:11:34,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:11:34,680 INFO L87 Difference]: Start difference. First operand 349 states and 867 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:34,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:34,790 INFO L93 Difference]: Finished difference Result 530 states and 1325 transitions. [2021-03-11 00:11:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:11:34,791 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:11:34,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:34,793 INFO L225 Difference]: With dead ends: 530 [2021-03-11 00:11:34,794 INFO L226 Difference]: Without dead ends: 493 [2021-03-11 00:11:34,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:11:34,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-03-11 00:11:34,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 439. [2021-03-11 00:11:34,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.5525114155251143) internal successors, (1118), 438 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:34,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1118 transitions. [2021-03-11 00:11:34,805 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1118 transitions. Word has length 28 [2021-03-11 00:11:34,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:34,805 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 1118 transitions. [2021-03-11 00:11:34,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:34,805 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1118 transitions. [2021-03-11 00:11:34,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:11:34,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:34,806 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:35,019 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:35,019 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:35,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:35,020 INFO L82 PathProgramCache]: Analyzing trace with hash 152433534, now seen corresponding path program 6 times [2021-03-11 00:11:35,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:35,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319545390] [2021-03-11 00:11:35,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:35,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:35,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319545390] [2021-03-11 00:11:35,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374646010] [2021-03-11 00:11:35,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:35,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:11:35,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:35,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:11:35,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:35,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:35,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:35,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2021-03-11 00:11:35,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880405389] [2021-03-11 00:11:35,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:11:35,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:35,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:11:35,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:11:35,242 INFO L87 Difference]: Start difference. First operand 439 states and 1118 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:35,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:35,355 INFO L93 Difference]: Finished difference Result 526 states and 1316 transitions. [2021-03-11 00:11:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:11:35,356 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:11:35,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:35,358 INFO L225 Difference]: With dead ends: 526 [2021-03-11 00:11:35,358 INFO L226 Difference]: Without dead ends: 486 [2021-03-11 00:11:35,358 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:11:35,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-03-11 00:11:35,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 429. [2021-03-11 00:11:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.5490654205607477) internal successors, (1091), 428 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1091 transitions. [2021-03-11 00:11:35,368 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1091 transitions. Word has length 28 [2021-03-11 00:11:35,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:35,368 INFO L480 AbstractCegarLoop]: Abstraction has 429 states and 1091 transitions. [2021-03-11 00:11:35,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:35,368 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1091 transitions. [2021-03-11 00:11:35,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:11:35,369 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:35,369 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:35,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:35,592 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:35,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:35,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1703038790, now seen corresponding path program 7 times [2021-03-11 00:11:35,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:35,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590305267] [2021-03-11 00:11:35,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:35,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590305267] [2021-03-11 00:11:35,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653956428] [2021-03-11 00:11:35,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:11:35,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:35,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:35,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:35,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:35,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2021-03-11 00:11:35,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315011488] [2021-03-11 00:11:35,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:11:35,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:35,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:11:35,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:11:35,845 INFO L87 Difference]: Start difference. First operand 429 states and 1091 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-03-11 00:11:35,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:35,944 INFO L93 Difference]: Finished difference Result 623 states and 1567 transitions. [2021-03-11 00:11:35,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:11:35,944 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 28 [2021-03-11 00:11:35,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:35,947 INFO L225 Difference]: With dead ends: 623 [2021-03-11 00:11:35,947 INFO L226 Difference]: Without dead ends: 585 [2021-03-11 00:11:35,948 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:11:35,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-03-11 00:11:35,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 479. [2021-03-11 00:11:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.598326359832636) internal successors, (1242), 478 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:35,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1242 transitions. [2021-03-11 00:11:35,964 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1242 transitions. Word has length 28 [2021-03-11 00:11:35,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:35,965 INFO L480 AbstractCegarLoop]: Abstraction has 479 states and 1242 transitions. [2021-03-11 00:11:35,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-03-11 00:11:35,965 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1242 transitions. [2021-03-11 00:11:35,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:11:35,966 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:35,966 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:36,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-11 00:11:36,179 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:36,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:36,180 INFO L82 PathProgramCache]: Analyzing trace with hash -908403066, now seen corresponding path program 8 times [2021-03-11 00:11:36,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:36,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851607103] [2021-03-11 00:11:36,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:36,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:36,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851607103] [2021-03-11 00:11:36,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215296627] [2021-03-11 00:11:36,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:36,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:11:36,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:36,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:11:36,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:36,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:36,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2021-03-11 00:11:36,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473626671] [2021-03-11 00:11:36,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:11:36,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:36,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:11:36,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:11:36,426 INFO L87 Difference]: Start difference. First operand 479 states and 1242 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:36,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:36,533 INFO L93 Difference]: Finished difference Result 774 states and 2027 transitions. [2021-03-11 00:11:36,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:11:36,534 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:11:36,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:36,537 INFO L225 Difference]: With dead ends: 774 [2021-03-11 00:11:36,537 INFO L226 Difference]: Without dead ends: 737 [2021-03-11 00:11:36,538 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:11:36,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-03-11 00:11:36,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 491. [2021-03-11 00:11:36,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.595918367346939) internal successors, (1272), 490 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:36,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1272 transitions. [2021-03-11 00:11:36,551 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1272 transitions. Word has length 28 [2021-03-11 00:11:36,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:36,551 INFO L480 AbstractCegarLoop]: Abstraction has 491 states and 1272 transitions. [2021-03-11 00:11:36,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:36,552 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1272 transitions. [2021-03-11 00:11:36,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:11:36,555 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:36,555 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:36,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-11 00:11:36,777 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:36,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:36,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1688905474, now seen corresponding path program 9 times [2021-03-11 00:11:36,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:36,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508455622] [2021-03-11 00:11:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:36,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:36,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508455622] [2021-03-11 00:11:36,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762646188] [2021-03-11 00:11:36,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:11:36,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:11:36,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:36,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:11:36,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:37,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:37,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2021-03-11 00:11:37,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059173014] [2021-03-11 00:11:37,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:11:37,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:37,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:11:37,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:11:37,045 INFO L87 Difference]: Start difference. First operand 491 states and 1272 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:37,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:37,127 INFO L93 Difference]: Finished difference Result 766 states and 2025 transitions. [2021-03-11 00:11:37,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-11 00:11:37,128 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:11:37,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:37,134 INFO L225 Difference]: With dead ends: 766 [2021-03-11 00:11:37,134 INFO L226 Difference]: Without dead ends: 729 [2021-03-11 00:11:37,134 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:11:37,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-03-11 00:11:37,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 509. [2021-03-11 00:11:37,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.604330708661417) internal successors, (1323), 508 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:37,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1323 transitions. [2021-03-11 00:11:37,150 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1323 transitions. Word has length 28 [2021-03-11 00:11:37,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:37,150 INFO L480 AbstractCegarLoop]: Abstraction has 509 states and 1323 transitions. [2021-03-11 00:11:37,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:37,150 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1323 transitions. [2021-03-11 00:11:37,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:11:37,152 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:37,152 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:37,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-11 00:11:37,359 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:37,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:37,360 INFO L82 PathProgramCache]: Analyzing trace with hash 705112774, now seen corresponding path program 10 times [2021-03-11 00:11:37,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:37,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166722865] [2021-03-11 00:11:37,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:37,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166722865] [2021-03-11 00:11:37,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810529310] [2021-03-11 00:11:37,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:37,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:11:37,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:37,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:11:37,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:37,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:37,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:37,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2021-03-11 00:11:37,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102176032] [2021-03-11 00:11:37,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:11:37,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:37,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:11:37,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:11:37,611 INFO L87 Difference]: Start difference. First operand 509 states and 1323 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:37,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:37,737 INFO L93 Difference]: Finished difference Result 860 states and 2316 transitions. [2021-03-11 00:11:37,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:11:37,737 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:11:37,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:37,741 INFO L225 Difference]: With dead ends: 860 [2021-03-11 00:11:37,741 INFO L226 Difference]: Without dead ends: 823 [2021-03-11 00:11:37,741 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:11:37,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-03-11 00:11:37,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 587. [2021-03-11 00:11:37,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.645051194539249) internal successors, (1550), 586 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:37,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1550 transitions. [2021-03-11 00:11:37,755 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1550 transitions. Word has length 28 [2021-03-11 00:11:37,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:37,755 INFO L480 AbstractCegarLoop]: Abstraction has 587 states and 1550 transitions. [2021-03-11 00:11:37,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:37,755 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1550 transitions. [2021-03-11 00:11:37,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:11:37,757 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:37,757 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:37,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:37,975 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:37,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:37,976 INFO L82 PathProgramCache]: Analyzing trace with hash 586029762, now seen corresponding path program 11 times [2021-03-11 00:11:37,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:37,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551965254] [2021-03-11 00:11:37,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:38,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:38,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551965254] [2021-03-11 00:11:38,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138690935] [2021-03-11 00:11:38,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:38,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:11:38,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:38,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:11:38,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:38,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:38,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:38,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2021-03-11 00:11:38,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311851152] [2021-03-11 00:11:38,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:11:38,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:38,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:11:38,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:11:38,195 INFO L87 Difference]: Start difference. First operand 587 states and 1550 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:38,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:38,331 INFO L93 Difference]: Finished difference Result 864 states and 2321 transitions. [2021-03-11 00:11:38,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:11:38,332 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:11:38,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:38,336 INFO L225 Difference]: With dead ends: 864 [2021-03-11 00:11:38,336 INFO L226 Difference]: Without dead ends: 822 [2021-03-11 00:11:38,337 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:11:38,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-03-11 00:11:38,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 571. [2021-03-11 00:11:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.645614035087719) internal successors, (1508), 570 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:38,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1508 transitions. [2021-03-11 00:11:38,364 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1508 transitions. Word has length 28 [2021-03-11 00:11:38,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:38,364 INFO L480 AbstractCegarLoop]: Abstraction has 571 states and 1508 transitions. [2021-03-11 00:11:38,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:38,365 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1508 transitions. [2021-03-11 00:11:38,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:11:38,366 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:38,366 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:38,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-11 00:11:38,567 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:38,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:38,567 INFO L82 PathProgramCache]: Analyzing trace with hash -645966640, now seen corresponding path program 12 times [2021-03-11 00:11:38,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:38,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576774365] [2021-03-11 00:11:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:38,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576774365] [2021-03-11 00:11:38,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192364200] [2021-03-11 00:11:38,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:38,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:11:38,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:38,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:11:38,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:38,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:38,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2021-03-11 00:11:38,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461719411] [2021-03-11 00:11:38,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:11:38,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:38,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:11:38,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:11:38,813 INFO L87 Difference]: Start difference. First operand 571 states and 1508 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-03-11 00:11:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:38,932 INFO L93 Difference]: Finished difference Result 752 states and 1956 transitions. [2021-03-11 00:11:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:11:38,932 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 28 [2021-03-11 00:11:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:38,935 INFO L225 Difference]: With dead ends: 752 [2021-03-11 00:11:38,936 INFO L226 Difference]: Without dead ends: 715 [2021-03-11 00:11:38,937 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 142.4ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:11:38,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-03-11 00:11:38,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 559. [2021-03-11 00:11:38,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.6415770609319) internal successors, (1474), 558 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:38,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1474 transitions. [2021-03-11 00:11:38,950 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1474 transitions. Word has length 28 [2021-03-11 00:11:38,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:38,950 INFO L480 AbstractCegarLoop]: Abstraction has 559 states and 1474 transitions. [2021-03-11 00:11:38,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-03-11 00:11:38,950 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1474 transitions. [2021-03-11 00:11:38,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:11:38,951 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:38,951 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:39,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:39,167 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:39,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:39,168 INFO L82 PathProgramCache]: Analyzing trace with hash 638629600, now seen corresponding path program 13 times [2021-03-11 00:11:39,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:39,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038851873] [2021-03-11 00:11:39,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:39,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038851873] [2021-03-11 00:11:39,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978149433] [2021-03-11 00:11:39,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:39,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:39,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:11:39,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:39,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:39,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:39,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 11 [2021-03-11 00:11:39,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527180387] [2021-03-11 00:11:39,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:11:39,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:39,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:11:39,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:11:39,379 INFO L87 Difference]: Start difference. First operand 559 states and 1474 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:39,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:39,468 INFO L93 Difference]: Finished difference Result 718 states and 1889 transitions. [2021-03-11 00:11:39,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:11:39,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:11:39,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:39,472 INFO L225 Difference]: With dead ends: 718 [2021-03-11 00:11:39,472 INFO L226 Difference]: Without dead ends: 681 [2021-03-11 00:11:39,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:11:39,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-03-11 00:11:39,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 629. [2021-03-11 00:11:39,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.676751592356688) internal successors, (1681), 628 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:39,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1681 transitions. [2021-03-11 00:11:39,488 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1681 transitions. Word has length 28 [2021-03-11 00:11:39,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:39,488 INFO L480 AbstractCegarLoop]: Abstraction has 629 states and 1681 transitions. [2021-03-11 00:11:39,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:39,489 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1681 transitions. [2021-03-11 00:11:39,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:11:39,490 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:39,490 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:39,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-11 00:11:39,713 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:39,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:39,714 INFO L82 PathProgramCache]: Analyzing trace with hash 519546588, now seen corresponding path program 14 times [2021-03-11 00:11:39,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:39,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437200999] [2021-03-11 00:11:39,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:39,800 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:11:39,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437200999] [2021-03-11 00:11:39,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408264540] [2021-03-11 00:11:39,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:39,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:11:39,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:39,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-11 00:11:39,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:39,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:39,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-03-11 00:11:39,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950721995] [2021-03-11 00:11:39,920 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:11:39,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:39,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:11:39,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:11:39,922 INFO L87 Difference]: Start difference. First operand 629 states and 1681 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:40,014 INFO L93 Difference]: Finished difference Result 722 states and 1896 transitions. [2021-03-11 00:11:40,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:11:40,015 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-11 00:11:40,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:40,018 INFO L225 Difference]: With dead ends: 722 [2021-03-11 00:11:40,018 INFO L226 Difference]: Without dead ends: 682 [2021-03-11 00:11:40,019 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:11:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-03-11 00:11:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 573. [2021-03-11 00:11:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.645104895104895) internal successors, (1513), 572 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:40,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1513 transitions. [2021-03-11 00:11:40,033 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1513 transitions. Word has length 28 [2021-03-11 00:11:40,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:40,033 INFO L480 AbstractCegarLoop]: Abstraction has 573 states and 1513 transitions. [2021-03-11 00:11:40,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:40,033 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1513 transitions. [2021-03-11 00:11:40,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-11 00:11:40,036 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:40,036 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:40,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-03-11 00:11:40,259 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:40,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:40,260 INFO L82 PathProgramCache]: Analyzing trace with hash 663834170, now seen corresponding path program 15 times [2021-03-11 00:11:40,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:40,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325551427] [2021-03-11 00:11:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:40,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325551427] [2021-03-11 00:11:40,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334856349] [2021-03-11 00:11:40,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:40,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:11:40,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:40,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:11:40,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:40,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:40,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2021-03-11 00:11:40,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057997247] [2021-03-11 00:11:40,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:11:40,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:40,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:11:40,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:11:40,494 INFO L87 Difference]: Start difference. First operand 573 states and 1513 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-03-11 00:11:40,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:40,597 INFO L93 Difference]: Finished difference Result 765 states and 1984 transitions. [2021-03-11 00:11:40,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:11:40,598 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 28 [2021-03-11 00:11:40,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:40,600 INFO L225 Difference]: With dead ends: 765 [2021-03-11 00:11:40,600 INFO L226 Difference]: Without dead ends: 727 [2021-03-11 00:11:40,601 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 131.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:11:40,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 727 states. [2021-03-11 00:11:40,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 727 to 543. [2021-03-11 00:11:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.6457564575645756) internal successors, (1434), 542 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:40,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1434 transitions. [2021-03-11 00:11:40,614 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1434 transitions. Word has length 28 [2021-03-11 00:11:40,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:40,614 INFO L480 AbstractCegarLoop]: Abstraction has 543 states and 1434 transitions. [2021-03-11 00:11:40,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-03-11 00:11:40,614 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1434 transitions. [2021-03-11 00:11:40,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:40,615 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:40,615 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:40,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:40,838 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:40,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:40,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1075166198, now seen corresponding path program 16 times [2021-03-11 00:11:40,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:40,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164874076] [2021-03-11 00:11:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:40,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164874076] [2021-03-11 00:11:40,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794167670] [2021-03-11 00:11:40,867 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:40,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:11:40,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:40,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:40,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:40,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:40,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:11:40,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642062318] [2021-03-11 00:11:40,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:11:40,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:40,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:11:40,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:11:40,994 INFO L87 Difference]: Start difference. First operand 543 states and 1434 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:41,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:41,103 INFO L93 Difference]: Finished difference Result 992 states and 2597 transitions. [2021-03-11 00:11:41,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:11:41,104 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:41,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:41,108 INFO L225 Difference]: With dead ends: 992 [2021-03-11 00:11:41,108 INFO L226 Difference]: Without dead ends: 992 [2021-03-11 00:11:41,109 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:11:41,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-03-11 00:11:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 587. [2021-03-11 00:11:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.66382252559727) internal successors, (1561), 586 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:41,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1561 transitions. [2021-03-11 00:11:41,130 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1561 transitions. Word has length 31 [2021-03-11 00:11:41,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:41,130 INFO L480 AbstractCegarLoop]: Abstraction has 587 states and 1561 transitions. [2021-03-11 00:11:41,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1561 transitions. [2021-03-11 00:11:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:41,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:41,133 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:41,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-03-11 00:11:41,356 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:41,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:41,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1496697428, now seen corresponding path program 17 times [2021-03-11 00:11:41,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:41,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227591081] [2021-03-11 00:11:41,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:41,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:41,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227591081] [2021-03-11 00:11:41,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384653773] [2021-03-11 00:11:41,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:41,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:11:41,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:41,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:41,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:41,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:41,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:41,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:11:41,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61931359] [2021-03-11 00:11:41,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:11:41,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:41,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:11:41,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:11:41,471 INFO L87 Difference]: Start difference. First operand 587 states and 1561 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:41,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:41,559 INFO L93 Difference]: Finished difference Result 1042 states and 2731 transitions. [2021-03-11 00:11:41,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:11:41,559 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:41,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:41,576 INFO L225 Difference]: With dead ends: 1042 [2021-03-11 00:11:41,576 INFO L226 Difference]: Without dead ends: 997 [2021-03-11 00:11:41,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:11:41,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-03-11 00:11:41,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 587. [2021-03-11 00:11:41,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.651877133105802) internal successors, (1554), 586 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:41,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1554 transitions. [2021-03-11 00:11:41,598 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1554 transitions. Word has length 31 [2021-03-11 00:11:41,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:41,598 INFO L480 AbstractCegarLoop]: Abstraction has 587 states and 1554 transitions. [2021-03-11 00:11:41,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:41,598 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1554 transitions. [2021-03-11 00:11:41,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:41,600 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:41,600 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:41,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-11 00:11:41,819 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:41,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:41,820 INFO L82 PathProgramCache]: Analyzing trace with hash 73958184, now seen corresponding path program 18 times [2021-03-11 00:11:41,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:41,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831069753] [2021-03-11 00:11:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:41,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831069753] [2021-03-11 00:11:41,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11418187] [2021-03-11 00:11:41,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:41,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:11:41,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:41,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:41,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:41,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:41,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:11:41,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353704457] [2021-03-11 00:11:41,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:11:41,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:41,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:11:41,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:41,975 INFO L87 Difference]: Start difference. First operand 587 states and 1554 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:42,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:42,211 INFO L93 Difference]: Finished difference Result 2039 states and 5214 transitions. [2021-03-11 00:11:42,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:11:42,212 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:42,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:42,215 INFO L225 Difference]: With dead ends: 2039 [2021-03-11 00:11:42,215 INFO L226 Difference]: Without dead ends: 2039 [2021-03-11 00:11:42,215 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:11:42,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-03-11 00:11:42,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 884. [2021-03-11 00:11:42,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.7633069082672708) internal successors, (2440), 883 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2440 transitions. [2021-03-11 00:11:42,239 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2440 transitions. Word has length 31 [2021-03-11 00:11:42,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:42,239 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 2440 transitions. [2021-03-11 00:11:42,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:42,239 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2440 transitions. [2021-03-11 00:11:42,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:42,241 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:42,241 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:42,459 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:42,459 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:42,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:42,460 INFO L82 PathProgramCache]: Analyzing trace with hash -136738862, now seen corresponding path program 19 times [2021-03-11 00:11:42,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:42,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549573620] [2021-03-11 00:11:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:42,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549573620] [2021-03-11 00:11:42,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730169461] [2021-03-11 00:11:42,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:42,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:42,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:42,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:42,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:11:42,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254985350] [2021-03-11 00:11:42,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:11:42,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:42,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:11:42,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:42,590 INFO L87 Difference]: Start difference. First operand 884 states and 2440 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:42,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:42,779 INFO L93 Difference]: Finished difference Result 1980 states and 5236 transitions. [2021-03-11 00:11:42,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:11:42,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:42,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:42,783 INFO L225 Difference]: With dead ends: 1980 [2021-03-11 00:11:42,783 INFO L226 Difference]: Without dead ends: 1968 [2021-03-11 00:11:42,783 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:11:42,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-03-11 00:11:42,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1100. [2021-03-11 00:11:42,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 2.808007279344859) internal successors, (3086), 1099 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:42,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 3086 transitions. [2021-03-11 00:11:42,810 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 3086 transitions. Word has length 31 [2021-03-11 00:11:42,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:42,810 INFO L480 AbstractCegarLoop]: Abstraction has 1100 states and 3086 transitions. [2021-03-11 00:11:42,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:42,810 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 3086 transitions. [2021-03-11 00:11:42,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:42,813 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:42,813 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:43,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-11 00:11:43,036 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:43,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:43,036 INFO L82 PathProgramCache]: Analyzing trace with hash 592012956, now seen corresponding path program 20 times [2021-03-11 00:11:43,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:43,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863557551] [2021-03-11 00:11:43,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:43,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:43,067 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:43,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863557551] [2021-03-11 00:11:43,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196117375] [2021-03-11 00:11:43,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:43,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:11:43,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:43,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:43,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:43,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:43,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:11:43,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004180137] [2021-03-11 00:11:43,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:11:43,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:43,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:11:43,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:43,161 INFO L87 Difference]: Start difference. First operand 1100 states and 3086 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:43,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:43,394 INFO L93 Difference]: Finished difference Result 2053 states and 5419 transitions. [2021-03-11 00:11:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:11:43,395 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:43,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:43,397 INFO L225 Difference]: With dead ends: 2053 [2021-03-11 00:11:43,397 INFO L226 Difference]: Without dead ends: 2053 [2021-03-11 00:11:43,398 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:11:43,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-03-11 00:11:43,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1104. [2021-03-11 00:11:43,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 2.8068902991840434) internal successors, (3096), 1103 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:43,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 3096 transitions. [2021-03-11 00:11:43,418 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 3096 transitions. Word has length 31 [2021-03-11 00:11:43,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:43,418 INFO L480 AbstractCegarLoop]: Abstraction has 1104 states and 3096 transitions. [2021-03-11 00:11:43,418 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:43,418 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 3096 transitions. [2021-03-11 00:11:43,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:43,420 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:43,420 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:43,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:43,633 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:43,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:43,633 INFO L82 PathProgramCache]: Analyzing trace with hash 215041802, now seen corresponding path program 21 times [2021-03-11 00:11:43,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:43,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369846339] [2021-03-11 00:11:43,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:43,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:43,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369846339] [2021-03-11 00:11:43,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929362389] [2021-03-11 00:11:43,688 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:43,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-11 00:11:43,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:43,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:43,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:43,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:43,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:11:43,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380360789] [2021-03-11 00:11:43,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:11:43,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:43,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:11:43,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:43,804 INFO L87 Difference]: Start difference. First operand 1104 states and 3096 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:43,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:43,995 INFO L93 Difference]: Finished difference Result 2247 states and 5856 transitions. [2021-03-11 00:11:43,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:11:43,995 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:43,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:43,998 INFO L225 Difference]: With dead ends: 2247 [2021-03-11 00:11:43,998 INFO L226 Difference]: Without dead ends: 2233 [2021-03-11 00:11:43,999 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:11:44,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2021-03-11 00:11:44,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1111. [2021-03-11 00:11:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1110 states have (on average 2.791891891891892) internal successors, (3099), 1110 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3099 transitions. [2021-03-11 00:11:44,029 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3099 transitions. Word has length 31 [2021-03-11 00:11:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:44,029 INFO L480 AbstractCegarLoop]: Abstraction has 1111 states and 3099 transitions. [2021-03-11 00:11:44,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:44,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3099 transitions. [2021-03-11 00:11:44,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:44,031 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:44,031 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:44,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-11 00:11:44,232 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:44,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:44,232 INFO L82 PathProgramCache]: Analyzing trace with hash 299440576, now seen corresponding path program 22 times [2021-03-11 00:11:44,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:44,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777341605] [2021-03-11 00:11:44,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:44,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:44,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777341605] [2021-03-11 00:11:44,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140644691] [2021-03-11 00:11:44,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:44,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:11:44,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:44,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:44,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:44,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:44,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:11:44,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249660246] [2021-03-11 00:11:44,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:11:44,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:44,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:11:44,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:44,342 INFO L87 Difference]: Start difference. First operand 1111 states and 3099 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:44,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:44,472 INFO L93 Difference]: Finished difference Result 1836 states and 4940 transitions. [2021-03-11 00:11:44,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-11 00:11:44,472 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:44,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:44,476 INFO L225 Difference]: With dead ends: 1836 [2021-03-11 00:11:44,477 INFO L226 Difference]: Without dead ends: 1808 [2021-03-11 00:11:44,477 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:11:44,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2021-03-11 00:11:44,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1121. [2021-03-11 00:11:44,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 2.775) internal successors, (3108), 1120 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:44,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3108 transitions. [2021-03-11 00:11:44,504 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3108 transitions. Word has length 31 [2021-03-11 00:11:44,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:44,504 INFO L480 AbstractCegarLoop]: Abstraction has 1121 states and 3108 transitions. [2021-03-11 00:11:44,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:44,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3108 transitions. [2021-03-11 00:11:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:44,507 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:44,507 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:44,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-11 00:11:44,727 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:44,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:44,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2072647434, now seen corresponding path program 23 times [2021-03-11 00:11:44,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:44,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827816114] [2021-03-11 00:11:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:44,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:44,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827816114] [2021-03-11 00:11:44,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140510937] [2021-03-11 00:11:44,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:44,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:11:44,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:44,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:44,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:44,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:44,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-11 00:11:44,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579357920] [2021-03-11 00:11:44,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:11:44,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:44,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:11:44,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:11:44,845 INFO L87 Difference]: Start difference. First operand 1121 states and 3108 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:45,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:45,042 INFO L93 Difference]: Finished difference Result 2462 states and 6556 transitions. [2021-03-11 00:11:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:11:45,042 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:45,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:45,047 INFO L225 Difference]: With dead ends: 2462 [2021-03-11 00:11:45,048 INFO L226 Difference]: Without dead ends: 2408 [2021-03-11 00:11:45,048 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:11:45,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-03-11 00:11:45,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 1441. [2021-03-11 00:11:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 2.8208333333333333) internal successors, (4062), 1440 states have internal predecessors, (4062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:45,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 4062 transitions. [2021-03-11 00:11:45,083 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 4062 transitions. Word has length 31 [2021-03-11 00:11:45,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:45,083 INFO L480 AbstractCegarLoop]: Abstraction has 1441 states and 4062 transitions. [2021-03-11 00:11:45,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:45,083 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 4062 transitions. [2021-03-11 00:11:45,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:45,086 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:45,086 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:45,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-03-11 00:11:45,301 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:45,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:45,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1805660222, now seen corresponding path program 24 times [2021-03-11 00:11:45,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:45,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953835762] [2021-03-11 00:11:45,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:45,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:45,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953835762] [2021-03-11 00:11:45,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374894221] [2021-03-11 00:11:45,324 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:45,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:11:45,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:45,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:45,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:45,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:45,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-11 00:11:45,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706517964] [2021-03-11 00:11:45,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:11:45,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:45,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:11:45,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:45,415 INFO L87 Difference]: Start difference. First operand 1441 states and 4062 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:45,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:45,631 INFO L93 Difference]: Finished difference Result 2786 states and 7510 transitions. [2021-03-11 00:11:45,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:11:45,631 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:45,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:45,637 INFO L225 Difference]: With dead ends: 2786 [2021-03-11 00:11:45,637 INFO L226 Difference]: Without dead ends: 2786 [2021-03-11 00:11:45,638 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 156.0ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:11:45,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-03-11 00:11:45,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 1845. [2021-03-11 00:11:45,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1844 states have (on average 2.828633405639913) internal successors, (5216), 1844 states have internal predecessors, (5216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 5216 transitions. [2021-03-11 00:11:45,681 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 5216 transitions. Word has length 31 [2021-03-11 00:11:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:45,681 INFO L480 AbstractCegarLoop]: Abstraction has 1845 states and 5216 transitions. [2021-03-11 00:11:45,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 5216 transitions. [2021-03-11 00:11:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:45,685 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:45,685 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:45,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:45,907 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:45,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:45,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1164137342, now seen corresponding path program 25 times [2021-03-11 00:11:45,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:45,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355689012] [2021-03-11 00:11:45,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:45,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355689012] [2021-03-11 00:11:45,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314772121] [2021-03-11 00:11:45,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:11:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:45,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:45,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:46,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:46,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:11:46,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829590575] [2021-03-11 00:11:46,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:11:46,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:46,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:11:46,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:11:46,052 INFO L87 Difference]: Start difference. First operand 1845 states and 5216 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:46,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:46,151 INFO L93 Difference]: Finished difference Result 2330 states and 6455 transitions. [2021-03-11 00:11:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:11:46,152 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:46,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:46,155 INFO L225 Difference]: With dead ends: 2330 [2021-03-11 00:11:46,155 INFO L226 Difference]: Without dead ends: 2330 [2021-03-11 00:11:46,155 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:11:46,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-03-11 00:11:46,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1887. [2021-03-11 00:11:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 2.829798515376458) internal successors, (5337), 1886 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5337 transitions. [2021-03-11 00:11:46,192 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5337 transitions. Word has length 31 [2021-03-11 00:11:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:46,192 INFO L480 AbstractCegarLoop]: Abstraction has 1887 states and 5337 transitions. [2021-03-11 00:11:46,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:46,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5337 transitions. [2021-03-11 00:11:46,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:46,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:46,196 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:46,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-11 00:11:46,411 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:46,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:46,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1736902034, now seen corresponding path program 26 times [2021-03-11 00:11:46,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:46,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42026124] [2021-03-11 00:11:46,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:46,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:46,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42026124] [2021-03-11 00:11:46,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087266315] [2021-03-11 00:11:46,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:46,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:11:46,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:46,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:46,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:46,514 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:46,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:46,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-11 00:11:46,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174415570] [2021-03-11 00:11:46,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-11 00:11:46,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:46,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-11 00:11:46,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-11 00:11:46,515 INFO L87 Difference]: Start difference. First operand 1887 states and 5337 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:46,609 INFO L93 Difference]: Finished difference Result 2501 states and 6932 transitions. [2021-03-11 00:11:46,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-11 00:11:46,609 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:46,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:46,612 INFO L225 Difference]: With dead ends: 2501 [2021-03-11 00:11:46,612 INFO L226 Difference]: Without dead ends: 2465 [2021-03-11 00:11:46,612 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:11:46,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-03-11 00:11:46,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1887. [2021-03-11 00:11:46,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 2.8266171792152703) internal successors, (5331), 1886 states have internal predecessors, (5331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:46,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5331 transitions. [2021-03-11 00:11:46,645 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5331 transitions. Word has length 31 [2021-03-11 00:11:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:46,646 INFO L480 AbstractCegarLoop]: Abstraction has 1887 states and 5331 transitions. [2021-03-11 00:11:46,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:46,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5331 transitions. [2021-03-11 00:11:46,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:46,649 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:46,649 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:46,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:46,863 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:46,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:46,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1310615324, now seen corresponding path program 27 times [2021-03-11 00:11:46,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:46,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312508605] [2021-03-11 00:11:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:46,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:46,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312508605] [2021-03-11 00:11:46,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931654367] [2021-03-11 00:11:46,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:11:46,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:11:46,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:46,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:46,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:46,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:46,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:11:46,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125254086] [2021-03-11 00:11:46,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:11:46,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:46,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:11:46,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:46,998 INFO L87 Difference]: Start difference. First operand 1887 states and 5331 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:47,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:47,158 INFO L93 Difference]: Finished difference Result 2490 states and 6843 transitions. [2021-03-11 00:11:47,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:11:47,158 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:47,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:47,162 INFO L225 Difference]: With dead ends: 2490 [2021-03-11 00:11:47,162 INFO L226 Difference]: Without dead ends: 2490 [2021-03-11 00:11:47,162 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:11:47,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-03-11 00:11:47,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 2067. [2021-03-11 00:11:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 2.8330106485963213) internal successors, (5853), 2066 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:47,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 5853 transitions. [2021-03-11 00:11:47,197 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 5853 transitions. Word has length 31 [2021-03-11 00:11:47,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:47,197 INFO L480 AbstractCegarLoop]: Abstraction has 2067 states and 5853 transitions. [2021-03-11 00:11:47,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:47,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 5853 transitions. [2021-03-11 00:11:47,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:47,200 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:47,200 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:47,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-11 00:11:47,414 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:47,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:47,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1055874042, now seen corresponding path program 28 times [2021-03-11 00:11:47,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:47,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722649764] [2021-03-11 00:11:47,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:47,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:47,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:47,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722649764] [2021-03-11 00:11:47,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293307366] [2021-03-11 00:11:47,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:11:47,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:11:47,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:47,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:47,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:47,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:47,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:11:47,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125182969] [2021-03-11 00:11:47,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:11:47,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:47,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:11:47,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:47,542 INFO L87 Difference]: Start difference. First operand 2067 states and 5853 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:47,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:47,746 INFO L93 Difference]: Finished difference Result 2862 states and 7833 transitions. [2021-03-11 00:11:47,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:11:47,746 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:47,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:47,751 INFO L225 Difference]: With dead ends: 2862 [2021-03-11 00:11:47,751 INFO L226 Difference]: Without dead ends: 2838 [2021-03-11 00:11:47,751 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 137.7ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:11:47,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2021-03-11 00:11:47,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2147. [2021-03-11 00:11:47,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 2.8355079217148185) internal successors, (6085), 2146 states have internal predecessors, (6085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:47,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 6085 transitions. [2021-03-11 00:11:47,797 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 6085 transitions. Word has length 31 [2021-03-11 00:11:47,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:47,797 INFO L480 AbstractCegarLoop]: Abstraction has 2147 states and 6085 transitions. [2021-03-11 00:11:47,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:47,797 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 6085 transitions. [2021-03-11 00:11:47,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:47,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:47,801 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:48,024 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-03-11 00:11:48,025 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:48,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:48,025 INFO L82 PathProgramCache]: Analyzing trace with hash -276839870, now seen corresponding path program 29 times [2021-03-11 00:11:48,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:48,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376098639] [2021-03-11 00:11:48,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:48,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376098639] [2021-03-11 00:11:48,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979177044] [2021-03-11 00:11:48,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:48,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:11:48,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:48,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:48,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:48,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:48,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:11:48,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574858550] [2021-03-11 00:11:48,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:11:48,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:48,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:11:48,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:48,160 INFO L87 Difference]: Start difference. First operand 2147 states and 6085 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:48,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:48,371 INFO L93 Difference]: Finished difference Result 3330 states and 8999 transitions. [2021-03-11 00:11:48,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:11:48,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:48,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:48,376 INFO L225 Difference]: With dead ends: 3330 [2021-03-11 00:11:48,376 INFO L226 Difference]: Without dead ends: 3330 [2021-03-11 00:11:48,376 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:11:48,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2021-03-11 00:11:48,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2317. [2021-03-11 00:11:48,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 2.8626943005181347) internal successors, (6630), 2316 states have internal predecessors, (6630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 6630 transitions. [2021-03-11 00:11:48,423 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 6630 transitions. Word has length 31 [2021-03-11 00:11:48,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:48,423 INFO L480 AbstractCegarLoop]: Abstraction has 2317 states and 6630 transitions. [2021-03-11 00:11:48,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:48,423 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 6630 transitions. [2021-03-11 00:11:48,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:48,428 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:48,428 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:48,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-03-11 00:11:48,643 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:48,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:48,644 INFO L82 PathProgramCache]: Analyzing trace with hash -487536916, now seen corresponding path program 30 times [2021-03-11 00:11:48,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:48,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656547076] [2021-03-11 00:11:48,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:48,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:48,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656547076] [2021-03-11 00:11:48,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500937859] [2021-03-11 00:11:48,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:48,723 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-11 00:11:48,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:48,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:48,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:48,796 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:48,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:48,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:11:48,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907741944] [2021-03-11 00:11:48,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:11:48,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:48,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:11:48,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:48,797 INFO L87 Difference]: Start difference. First operand 2317 states and 6630 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:49,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:49,030 INFO L93 Difference]: Finished difference Result 3536 states and 9738 transitions. [2021-03-11 00:11:49,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:11:49,031 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:49,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:49,036 INFO L225 Difference]: With dead ends: 3536 [2021-03-11 00:11:49,037 INFO L226 Difference]: Without dead ends: 3524 [2021-03-11 00:11:49,037 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 143.3ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:11:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3524 states. [2021-03-11 00:11:49,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3524 to 2553. [2021-03-11 00:11:49,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2552 states have (on average 2.865203761755486) internal successors, (7312), 2552 states have internal predecessors, (7312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:49,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 7312 transitions. [2021-03-11 00:11:49,093 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 7312 transitions. Word has length 31 [2021-03-11 00:11:49,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:49,094 INFO L480 AbstractCegarLoop]: Abstraction has 2553 states and 7312 transitions. [2021-03-11 00:11:49,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:49,094 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 7312 transitions. [2021-03-11 00:11:49,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:49,099 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:49,099 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:49,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-11 00:11:49,316 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:49,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:49,316 INFO L82 PathProgramCache]: Analyzing trace with hash 241214902, now seen corresponding path program 31 times [2021-03-11 00:11:49,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:49,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493734658] [2021-03-11 00:11:49,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:49,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:49,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493734658] [2021-03-11 00:11:49,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540750962] [2021-03-11 00:11:49,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:11:49,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:49,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:49,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:49,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:49,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:11:49,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67219429] [2021-03-11 00:11:49,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:11:49,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:49,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:11:49,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:49,454 INFO L87 Difference]: Start difference. First operand 2553 states and 7312 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:49,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:49,722 INFO L93 Difference]: Finished difference Result 3564 states and 9736 transitions. [2021-03-11 00:11:49,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:11:49,723 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:49,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:49,729 INFO L225 Difference]: With dead ends: 3564 [2021-03-11 00:11:49,729 INFO L226 Difference]: Without dead ends: 3564 [2021-03-11 00:11:49,730 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 156.4ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:11:49,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-03-11 00:11:49,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2557. [2021-03-11 00:11:49,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2557 states, 2556 states have (on average 2.856025039123631) internal successors, (7300), 2556 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 7300 transitions. [2021-03-11 00:11:49,784 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 7300 transitions. Word has length 31 [2021-03-11 00:11:49,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:49,785 INFO L480 AbstractCegarLoop]: Abstraction has 2557 states and 7300 transitions. [2021-03-11 00:11:49,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 7300 transitions. [2021-03-11 00:11:49,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:49,790 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:49,790 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:50,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-11 00:11:50,012 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:50,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:50,012 INFO L82 PathProgramCache]: Analyzing trace with hash -135756252, now seen corresponding path program 32 times [2021-03-11 00:11:50,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:50,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282271831] [2021-03-11 00:11:50,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:50,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:50,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282271831] [2021-03-11 00:11:50,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097141220] [2021-03-11 00:11:50,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:50,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:11:50,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:50,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:50,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:50,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:50,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-11 00:11:50,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796916161] [2021-03-11 00:11:50,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:11:50,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:50,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:11:50,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:50,126 INFO L87 Difference]: Start difference. First operand 2557 states and 7300 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:50,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:50,337 INFO L93 Difference]: Finished difference Result 3120 states and 8617 transitions. [2021-03-11 00:11:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:11:50,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:50,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:50,343 INFO L225 Difference]: With dead ends: 3120 [2021-03-11 00:11:50,343 INFO L226 Difference]: Without dead ends: 3106 [2021-03-11 00:11:50,343 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:11:50,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2021-03-11 00:11:50,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 2571. [2021-03-11 00:11:50,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2571 states, 2570 states have (on average 2.849805447470817) internal successors, (7324), 2570 states have internal predecessors, (7324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:50,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 7324 transitions. [2021-03-11 00:11:50,376 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 7324 transitions. Word has length 31 [2021-03-11 00:11:50,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:50,376 INFO L480 AbstractCegarLoop]: Abstraction has 2571 states and 7324 transitions. [2021-03-11 00:11:50,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:50,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 7324 transitions. [2021-03-11 00:11:50,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:50,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:50,380 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:50,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-11 00:11:50,580 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:50,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:50,581 INFO L82 PathProgramCache]: Analyzing trace with hash -2133092770, now seen corresponding path program 33 times [2021-03-11 00:11:50,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:50,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663453738] [2021-03-11 00:11:50,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:50,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663453738] [2021-03-11 00:11:50,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363818555] [2021-03-11 00:11:50,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:50,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:11:50,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:50,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:50,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:50,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:50,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-11 00:11:50,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533574805] [2021-03-11 00:11:50,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:11:50,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:50,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:11:50,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:11:50,719 INFO L87 Difference]: Start difference. First operand 2571 states and 7324 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:50,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:50,977 INFO L93 Difference]: Finished difference Result 3644 states and 10056 transitions. [2021-03-11 00:11:50,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:11:50,978 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:50,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:50,985 INFO L225 Difference]: With dead ends: 3644 [2021-03-11 00:11:50,985 INFO L226 Difference]: Without dead ends: 3644 [2021-03-11 00:11:50,985 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:11:50,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-03-11 00:11:51,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 2693. [2021-03-11 00:11:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2693 states, 2692 states have (on average 2.846582466567608) internal successors, (7663), 2692 states have internal predecessors, (7663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:51,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2693 states to 2693 states and 7663 transitions. [2021-03-11 00:11:51,040 INFO L78 Accepts]: Start accepts. Automaton has 2693 states and 7663 transitions. Word has length 31 [2021-03-11 00:11:51,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:51,040 INFO L480 AbstractCegarLoop]: Abstraction has 2693 states and 7663 transitions. [2021-03-11 00:11:51,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:51,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2693 states and 7663 transitions. [2021-03-11 00:11:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:51,047 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:51,047 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:51,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-03-11 00:11:51,263 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:51,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:51,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1233797400, now seen corresponding path program 34 times [2021-03-11 00:11:51,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:51,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088954098] [2021-03-11 00:11:51,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:51,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088954098] [2021-03-11 00:11:51,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155414524] [2021-03-11 00:11:51,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:51,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:11:51,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:51,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:51,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:51,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:51,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-11 00:11:51,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039303654] [2021-03-11 00:11:51,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:11:51,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:51,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:11:51,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:51,472 INFO L87 Difference]: Start difference. First operand 2693 states and 7663 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:51,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:51,684 INFO L93 Difference]: Finished difference Result 4193 states and 11519 transitions. [2021-03-11 00:11:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:11:51,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:51,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:51,689 INFO L225 Difference]: With dead ends: 4193 [2021-03-11 00:11:51,690 INFO L226 Difference]: Without dead ends: 4193 [2021-03-11 00:11:51,690 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:11:51,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-03-11 00:11:51,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 3161. [2021-03-11 00:11:51,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 3160 states have (on average 2.854113924050633) internal successors, (9019), 3160 states have internal predecessors, (9019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:51,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 9019 transitions. [2021-03-11 00:11:51,745 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 9019 transitions. Word has length 31 [2021-03-11 00:11:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:51,746 INFO L480 AbstractCegarLoop]: Abstraction has 3161 states and 9019 transitions. [2021-03-11 00:11:51,746 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:51,746 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 9019 transitions. [2021-03-11 00:11:51,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:51,751 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:51,751 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:51,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:51,973 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:51,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:51,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1092713782, now seen corresponding path program 35 times [2021-03-11 00:11:51,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:51,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937642138] [2021-03-11 00:11:51,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:51,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:11:51,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937642138] [2021-03-11 00:11:51,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971481168] [2021-03-11 00:11:51,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:52,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:11:52,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:52,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:52,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:52,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:52,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-03-11 00:11:52,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044155972] [2021-03-11 00:11:52,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-11 00:11:52,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:52,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-11 00:11:52,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-11 00:11:52,100 INFO L87 Difference]: Start difference. First operand 3161 states and 9019 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:52,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:52,319 INFO L93 Difference]: Finished difference Result 4026 states and 11093 transitions. [2021-03-11 00:11:52,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:11:52,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:52,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:52,327 INFO L225 Difference]: With dead ends: 4026 [2021-03-11 00:11:52,328 INFO L226 Difference]: Without dead ends: 4012 [2021-03-11 00:11:52,328 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:11:52,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4012 states. [2021-03-11 00:11:52,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4012 to 3057. [2021-03-11 00:11:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3057 states, 3056 states have (on average 2.8406413612565444) internal successors, (8681), 3056 states have internal predecessors, (8681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3057 states to 3057 states and 8681 transitions. [2021-03-11 00:11:52,392 INFO L78 Accepts]: Start accepts. Automaton has 3057 states and 8681 transitions. Word has length 31 [2021-03-11 00:11:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:52,393 INFO L480 AbstractCegarLoop]: Abstraction has 3057 states and 8681 transitions. [2021-03-11 00:11:52,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:52,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3057 states and 8681 transitions. [2021-03-11 00:11:52,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-03-11 00:11:52,399 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:52,399 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:52,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:52,621 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:52,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:52,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1008315008, now seen corresponding path program 36 times [2021-03-11 00:11:52,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:52,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356992447] [2021-03-11 00:11:52,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:52,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356992447] [2021-03-11 00:11:52,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568294942] [2021-03-11 00:11:52,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:52,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:11:52,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:52,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-11 00:11:52,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:52,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:52,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:52,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-11 00:11:52,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328214188] [2021-03-11 00:11:52,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-11 00:11:52,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:52,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-11 00:11:52,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-11 00:11:52,764 INFO L87 Difference]: Start difference. First operand 3057 states and 8681 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:52,999 INFO L93 Difference]: Finished difference Result 4063 states and 11292 transitions. [2021-03-11 00:11:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:11:52,999 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-03-11 00:11:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:53,007 INFO L225 Difference]: With dead ends: 4063 [2021-03-11 00:11:53,007 INFO L226 Difference]: Without dead ends: 4007 [2021-03-11 00:11:53,007 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:11:53,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-03-11 00:11:53,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3327. [2021-03-11 00:11:53,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.850871918220084) internal successors, (9482), 3326 states have internal predecessors, (9482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 9482 transitions. [2021-03-11 00:11:53,074 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 9482 transitions. Word has length 31 [2021-03-11 00:11:53,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:53,075 INFO L480 AbstractCegarLoop]: Abstraction has 3327 states and 9482 transitions. [2021-03-11 00:11:53,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:53,075 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 9482 transitions. [2021-03-11 00:11:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:11:53,082 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:53,082 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:53,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:53,305 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:53,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:53,305 INFO L82 PathProgramCache]: Analyzing trace with hash 225377440, now seen corresponding path program 37 times [2021-03-11 00:11:53,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:53,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114012730] [2021-03-11 00:11:53,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:53,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:53,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114012730] [2021-03-11 00:11:53,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048864950] [2021-03-11 00:11:53,455 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:53,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:53,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:11:53,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:53,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:53,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-11 00:11:53,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141177635] [2021-03-11 00:11:53,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:11:53,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:53,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:11:53,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:11:53,660 INFO L87 Difference]: Start difference. First operand 3327 states and 9482 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:53,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:53,828 INFO L93 Difference]: Finished difference Result 5088 states and 14550 transitions. [2021-03-11 00:11:53,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:11:53,828 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:11:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:53,835 INFO L225 Difference]: With dead ends: 5088 [2021-03-11 00:11:53,835 INFO L226 Difference]: Without dead ends: 5050 [2021-03-11 00:11:53,835 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 197.0ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:11:53,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2021-03-11 00:11:53,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 3355. [2021-03-11 00:11:53,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3354 states have (on average 2.8449612403100777) internal successors, (9542), 3354 states have internal predecessors, (9542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:53,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 9542 transitions. [2021-03-11 00:11:53,881 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 9542 transitions. Word has length 34 [2021-03-11 00:11:53,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:53,881 INFO L480 AbstractCegarLoop]: Abstraction has 3355 states and 9542 transitions. [2021-03-11 00:11:53,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:53,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 9542 transitions. [2021-03-11 00:11:53,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:11:53,886 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:53,886 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:54,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-11 00:11:54,087 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:54,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:54,087 INFO L82 PathProgramCache]: Analyzing trace with hash -236314294, now seen corresponding path program 38 times [2021-03-11 00:11:54,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:54,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085971786] [2021-03-11 00:11:54,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:54,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:54,225 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:54,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085971786] [2021-03-11 00:11:54,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567681992] [2021-03-11 00:11:54,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:54,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:11:54,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:54,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:11:54,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:54,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:54,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:11:54,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843525486] [2021-03-11 00:11:54,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:11:54,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:54,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:11:54,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:11:54,450 INFO L87 Difference]: Start difference. First operand 3355 states and 9542 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:54,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:54,744 INFO L93 Difference]: Finished difference Result 6932 states and 19936 transitions. [2021-03-11 00:11:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:11:54,744 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:11:54,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:54,756 INFO L225 Difference]: With dead ends: 6932 [2021-03-11 00:11:54,756 INFO L226 Difference]: Without dead ends: 6850 [2021-03-11 00:11:54,756 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 265.6ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:11:54,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6850 states. [2021-03-11 00:11:54,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6850 to 4710. [2021-03-11 00:11:54,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4710 states, 4709 states have (on average 2.8789551921851775) internal successors, (13557), 4709 states have internal predecessors, (13557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:54,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4710 states to 4710 states and 13557 transitions. [2021-03-11 00:11:54,825 INFO L78 Accepts]: Start accepts. Automaton has 4710 states and 13557 transitions. Word has length 34 [2021-03-11 00:11:54,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:54,825 INFO L480 AbstractCegarLoop]: Abstraction has 4710 states and 13557 transitions. [2021-03-11 00:11:54,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:54,826 INFO L276 IsEmpty]: Start isEmpty. Operand 4710 states and 13557 transitions. [2021-03-11 00:11:54,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:11:54,832 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:54,832 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:55,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:55,033 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:55,033 INFO L82 PathProgramCache]: Analyzing trace with hash 359791622, now seen corresponding path program 39 times [2021-03-11 00:11:55,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:55,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412281495] [2021-03-11 00:11:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:55,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412281495] [2021-03-11 00:11:55,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021525078] [2021-03-11 00:11:55,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:55,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:11:55,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:55,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:11:55,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:55,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:55,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:11:55,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863898438] [2021-03-11 00:11:55,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:11:55,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:55,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:11:55,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:11:55,403 INFO L87 Difference]: Start difference. First operand 4710 states and 13557 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:55,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:55,683 INFO L93 Difference]: Finished difference Result 6936 states and 19938 transitions. [2021-03-11 00:11:55,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:11:55,684 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:11:55,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:55,694 INFO L225 Difference]: With dead ends: 6936 [2021-03-11 00:11:55,694 INFO L226 Difference]: Without dead ends: 6824 [2021-03-11 00:11:55,694 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 245.5ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:11:55,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6824 states. [2021-03-11 00:11:55,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6824 to 4404. [2021-03-11 00:11:55,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4404 states, 4403 states have (on average 2.865319100613218) internal successors, (12616), 4403 states have internal predecessors, (12616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:55,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4404 states to 4404 states and 12616 transitions. [2021-03-11 00:11:55,764 INFO L78 Accepts]: Start accepts. Automaton has 4404 states and 12616 transitions. Word has length 34 [2021-03-11 00:11:55,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:55,764 INFO L480 AbstractCegarLoop]: Abstraction has 4404 states and 12616 transitions. [2021-03-11 00:11:55,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:55,764 INFO L276 IsEmpty]: Start isEmpty. Operand 4404 states and 12616 transitions. [2021-03-11 00:11:55,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:11:55,770 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:55,770 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:55,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-11 00:11:55,971 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:55,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:55,971 INFO L82 PathProgramCache]: Analyzing trace with hash -697731906, now seen corresponding path program 40 times [2021-03-11 00:11:55,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:55,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342248708] [2021-03-11 00:11:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:56,096 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:56,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342248708] [2021-03-11 00:11:56,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707838773] [2021-03-11 00:11:56,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:56,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:11:56,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:56,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:11:56,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:56,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:56,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:56,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-03-11 00:11:56,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86325804] [2021-03-11 00:11:56,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:11:56,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:56,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:11:56,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:11:56,320 INFO L87 Difference]: Start difference. First operand 4404 states and 12616 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:56,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:56,590 INFO L93 Difference]: Finished difference Result 6717 states and 19331 transitions. [2021-03-11 00:11:56,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:11:56,590 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:11:56,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:56,600 INFO L225 Difference]: With dead ends: 6717 [2021-03-11 00:11:56,600 INFO L226 Difference]: Without dead ends: 6641 [2021-03-11 00:11:56,601 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:11:56,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6641 states. [2021-03-11 00:11:56,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6641 to 4682. [2021-03-11 00:11:56,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4682 states, 4681 states have (on average 2.87267677846614) internal successors, (13447), 4681 states have internal predecessors, (13447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:56,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4682 states to 4682 states and 13447 transitions. [2021-03-11 00:11:56,687 INFO L78 Accepts]: Start accepts. Automaton has 4682 states and 13447 transitions. Word has length 34 [2021-03-11 00:11:56,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:56,687 INFO L480 AbstractCegarLoop]: Abstraction has 4682 states and 13447 transitions. [2021-03-11 00:11:56,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:56,688 INFO L276 IsEmpty]: Start isEmpty. Operand 4682 states and 13447 transitions. [2021-03-11 00:11:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:11:56,693 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:56,693 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:56,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-03-11 00:11:56,893 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:56,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:56,894 INFO L82 PathProgramCache]: Analyzing trace with hash 480842916, now seen corresponding path program 41 times [2021-03-11 00:11:56,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:56,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298348178] [2021-03-11 00:11:56,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:56,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:57,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298348178] [2021-03-11 00:11:57,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500270101] [2021-03-11 00:11:57,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:57,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:11:57,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:57,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:11:57,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:57,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:57,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:11:57,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758195025] [2021-03-11 00:11:57,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:11:57,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:57,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:11:57,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:11:57,252 INFO L87 Difference]: Start difference. First operand 4682 states and 13447 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:57,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:57,435 INFO L93 Difference]: Finished difference Result 6651 states and 19193 transitions. [2021-03-11 00:11:57,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:11:57,436 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:11:57,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:57,445 INFO L225 Difference]: With dead ends: 6651 [2021-03-11 00:11:57,445 INFO L226 Difference]: Without dead ends: 6613 [2021-03-11 00:11:57,445 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 208.1ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:11:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6613 states. [2021-03-11 00:11:57,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6613 to 4704. [2021-03-11 00:11:57,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4704 states, 4703 states have (on average 2.8730597490963214) internal successors, (13512), 4703 states have internal predecessors, (13512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:57,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 13512 transitions. [2021-03-11 00:11:57,541 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 13512 transitions. Word has length 34 [2021-03-11 00:11:57,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:57,542 INFO L480 AbstractCegarLoop]: Abstraction has 4704 states and 13512 transitions. [2021-03-11 00:11:57,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:57,542 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 13512 transitions. [2021-03-11 00:11:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:11:57,547 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:57,548 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:57,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:57,748 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:57,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:57,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1249457240, now seen corresponding path program 42 times [2021-03-11 00:11:57,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:57,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555798251] [2021-03-11 00:11:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:57,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:57,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555798251] [2021-03-11 00:11:57,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785637081] [2021-03-11 00:11:57,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:57,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:11:57,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:57,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:11:57,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:58,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:58,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-03-11 00:11:58,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690703492] [2021-03-11 00:11:58,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:11:58,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:58,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:11:58,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:11:58,118 INFO L87 Difference]: Start difference. First operand 4704 states and 13512 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:58,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:58,394 INFO L93 Difference]: Finished difference Result 7154 states and 20494 transitions. [2021-03-11 00:11:58,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:11:58,394 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:11:58,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:58,406 INFO L225 Difference]: With dead ends: 7154 [2021-03-11 00:11:58,406 INFO L226 Difference]: Without dead ends: 7052 [2021-03-11 00:11:58,406 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 274.5ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:11:58,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7052 states. [2021-03-11 00:11:58,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7052 to 6468. [2021-03-11 00:11:58,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6468 states, 6467 states have (on average 2.9008813978660895) internal successors, (18760), 6467 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:58,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6468 states to 6468 states and 18760 transitions. [2021-03-11 00:11:58,489 INFO L78 Accepts]: Start accepts. Automaton has 6468 states and 18760 transitions. Word has length 34 [2021-03-11 00:11:58,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:58,489 INFO L480 AbstractCegarLoop]: Abstraction has 6468 states and 18760 transitions. [2021-03-11 00:11:58,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:58,489 INFO L276 IsEmpty]: Start isEmpty. Operand 6468 states and 18760 transitions. [2021-03-11 00:11:58,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:11:58,497 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:58,497 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:58,697 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-03-11 00:11:58,697 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:58,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1769005992, now seen corresponding path program 43 times [2021-03-11 00:11:58,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:58,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755016113] [2021-03-11 00:11:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:58,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:58,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755016113] [2021-03-11 00:11:58,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667200490] [2021-03-11 00:11:58,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:58,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:11:58,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:59,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:59,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-11 00:11:59,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690818989] [2021-03-11 00:11:59,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:11:59,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:59,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:11:59,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:11:59,094 INFO L87 Difference]: Start difference. First operand 6468 states and 18760 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:11:59,349 INFO L93 Difference]: Finished difference Result 7452 states and 21366 transitions. [2021-03-11 00:11:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:11:59,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:11:59,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:11:59,362 INFO L225 Difference]: With dead ends: 7452 [2021-03-11 00:11:59,362 INFO L226 Difference]: Without dead ends: 7330 [2021-03-11 00:11:59,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:11:59,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2021-03-11 00:11:59,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 5896. [2021-03-11 00:11:59,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5896 states, 5895 states have (on average 2.891263782866836) internal successors, (17044), 5895 states have internal predecessors, (17044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:59,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 17044 transitions. [2021-03-11 00:11:59,454 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 17044 transitions. Word has length 34 [2021-03-11 00:11:59,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:11:59,454 INFO L480 AbstractCegarLoop]: Abstraction has 5896 states and 17044 transitions. [2021-03-11 00:11:59,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:11:59,454 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 17044 transitions. [2021-03-11 00:11:59,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:11:59,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:11:59,461 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:11:59,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:59,662 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:11:59,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:11:59,662 INFO L82 PathProgramCache]: Analyzing trace with hash -218400736, now seen corresponding path program 44 times [2021-03-11 00:11:59,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:11:59,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339550409] [2021-03-11 00:11:59,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:11:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:11:59,765 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:59,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339550409] [2021-03-11 00:11:59,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205397918] [2021-03-11 00:11:59,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:11:59,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:11:59,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:11:59,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:11:59,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:11:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:11:59,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:11:59,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-11 00:11:59,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359710416] [2021-03-11 00:11:59,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:11:59,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:11:59,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:11:59,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:11:59,990 INFO L87 Difference]: Start difference. First operand 5896 states and 17044 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:00,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:00,189 INFO L93 Difference]: Finished difference Result 6556 states and 18704 transitions. [2021-03-11 00:12:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:12:00,189 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:00,200 INFO L225 Difference]: With dead ends: 6556 [2021-03-11 00:12:00,200 INFO L226 Difference]: Without dead ends: 6480 [2021-03-11 00:12:00,200 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:12:00,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2021-03-11 00:12:00,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 5562. [2021-03-11 00:12:00,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5562 states, 5561 states have (on average 2.88563208056105) internal successors, (16047), 5561 states have internal predecessors, (16047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 16047 transitions. [2021-03-11 00:12:00,271 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 16047 transitions. Word has length 34 [2021-03-11 00:12:00,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:00,271 INFO L480 AbstractCegarLoop]: Abstraction has 5562 states and 16047 transitions. [2021-03-11 00:12:00,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:00,271 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 16047 transitions. [2021-03-11 00:12:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:00,278 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:00,278 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:00,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-03-11 00:12:00,479 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:00,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:00,479 INFO L82 PathProgramCache]: Analyzing trace with hash -862511400, now seen corresponding path program 45 times [2021-03-11 00:12:00,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:00,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168362499] [2021-03-11 00:12:00,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:00,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:00,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168362499] [2021-03-11 00:12:00,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332712101] [2021-03-11 00:12:00,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:00,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:12:00,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:00,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:00,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:00,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:00,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-03-11 00:12:00,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521460452] [2021-03-11 00:12:00,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:12:00,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:00,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:12:00,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:12:00,870 INFO L87 Difference]: Start difference. First operand 5562 states and 16047 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:01,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:01,209 INFO L93 Difference]: Finished difference Result 6381 states and 18213 transitions. [2021-03-11 00:12:01,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:12:01,210 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:01,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:01,220 INFO L225 Difference]: With dead ends: 6381 [2021-03-11 00:12:01,220 INFO L226 Difference]: Without dead ends: 6305 [2021-03-11 00:12:01,220 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 270.6ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:12:01,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2021-03-11 00:12:01,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 5827. [2021-03-11 00:12:01,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5827 states, 5826 states have (on average 2.8884311706144867) internal successors, (16828), 5826 states have internal predecessors, (16828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5827 states to 5827 states and 16828 transitions. [2021-03-11 00:12:01,289 INFO L78 Accepts]: Start accepts. Automaton has 5827 states and 16828 transitions. Word has length 34 [2021-03-11 00:12:01,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:01,289 INFO L480 AbstractCegarLoop]: Abstraction has 5827 states and 16828 transitions. [2021-03-11 00:12:01,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 5827 states and 16828 transitions. [2021-03-11 00:12:01,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:01,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:01,296 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:01,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:01,497 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:01,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:01,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1403446700, now seen corresponding path program 46 times [2021-03-11 00:12:01,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:01,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931197800] [2021-03-11 00:12:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:01,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:01,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931197800] [2021-03-11 00:12:01,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277654415] [2021-03-11 00:12:01,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:01,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:12:01,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:01,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:12:01,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:01,860 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:01,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:01,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:12:01,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975080066] [2021-03-11 00:12:01,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:12:01,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:01,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:12:01,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:12:01,861 INFO L87 Difference]: Start difference. First operand 5827 states and 16828 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:02,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:02,058 INFO L93 Difference]: Finished difference Result 7509 states and 21608 transitions. [2021-03-11 00:12:02,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:12:02,059 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:02,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:02,071 INFO L225 Difference]: With dead ends: 7509 [2021-03-11 00:12:02,071 INFO L226 Difference]: Without dead ends: 7419 [2021-03-11 00:12:02,071 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:12:02,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7419 states. [2021-03-11 00:12:02,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7419 to 7227. [2021-03-11 00:12:02,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7227 states, 7226 states have (on average 2.9022972598948242) internal successors, (20972), 7226 states have internal predecessors, (20972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:02,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7227 states to 7227 states and 20972 transitions. [2021-03-11 00:12:02,186 INFO L78 Accepts]: Start accepts. Automaton has 7227 states and 20972 transitions. Word has length 34 [2021-03-11 00:12:02,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:02,186 INFO L480 AbstractCegarLoop]: Abstraction has 7227 states and 20972 transitions. [2021-03-11 00:12:02,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:02,186 INFO L276 IsEmpty]: Start isEmpty. Operand 7227 states and 20972 transitions. [2021-03-11 00:12:02,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:02,199 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:02,199 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:02,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:02,415 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:02,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:02,416 INFO L82 PathProgramCache]: Analyzing trace with hash 180516264, now seen corresponding path program 47 times [2021-03-11 00:12:02,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:02,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48874168] [2021-03-11 00:12:02,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:02,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48874168] [2021-03-11 00:12:02,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063724169] [2021-03-11 00:12:02,505 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:12:02,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:12:02,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:02,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:12:02,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:02,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:02,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-03-11 00:12:02,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509373674] [2021-03-11 00:12:02,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:12:02,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:02,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:12:02,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:12:02,753 INFO L87 Difference]: Start difference. First operand 7227 states and 20972 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:02,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:02,914 INFO L93 Difference]: Finished difference Result 7681 states and 22109 transitions. [2021-03-11 00:12:02,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:12:02,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:02,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:02,925 INFO L225 Difference]: With dead ends: 7681 [2021-03-11 00:12:02,925 INFO L226 Difference]: Without dead ends: 7573 [2021-03-11 00:12:02,925 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 204.2ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:12:02,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7573 states. [2021-03-11 00:12:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7573 to 7191. [2021-03-11 00:12:03,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7191 states, 7190 states have (on average 2.9009735744089014) internal successors, (20858), 7190 states have internal predecessors, (20858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7191 states to 7191 states and 20858 transitions. [2021-03-11 00:12:03,085 INFO L78 Accepts]: Start accepts. Automaton has 7191 states and 20858 transitions. Word has length 34 [2021-03-11 00:12:03,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:03,086 INFO L480 AbstractCegarLoop]: Abstraction has 7191 states and 20858 transitions. [2021-03-11 00:12:03,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:03,086 INFO L276 IsEmpty]: Start isEmpty. Operand 7191 states and 20858 transitions. [2021-03-11 00:12:03,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:03,096 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:03,096 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:03,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-03-11 00:12:03,311 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:03,312 INFO L82 PathProgramCache]: Analyzing trace with hash 576311422, now seen corresponding path program 48 times [2021-03-11 00:12:03,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:03,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727826496] [2021-03-11 00:12:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:03,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:03,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727826496] [2021-03-11 00:12:03,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842479456] [2021-03-11 00:12:03,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:03,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:12:03,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:03,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:03,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:03,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:03,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:03,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-03-11 00:12:03,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994273901] [2021-03-11 00:12:03,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:12:03,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:03,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:12:03,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:12:03,632 INFO L87 Difference]: Start difference. First operand 7191 states and 20858 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:03,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:03,879 INFO L93 Difference]: Finished difference Result 8299 states and 23923 transitions. [2021-03-11 00:12:03,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:12:03,879 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:03,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:03,893 INFO L225 Difference]: With dead ends: 8299 [2021-03-11 00:12:03,893 INFO L226 Difference]: Without dead ends: 8182 [2021-03-11 00:12:03,893 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 218.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:12:03,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8182 states. [2021-03-11 00:12:03,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8182 to 7911. [2021-03-11 00:12:03,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7911 states, 7910 states have (on average 2.9107458912768647) internal successors, (23024), 7910 states have internal predecessors, (23024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:04,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 23024 transitions. [2021-03-11 00:12:04,004 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 23024 transitions. Word has length 34 [2021-03-11 00:12:04,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:04,004 INFO L480 AbstractCegarLoop]: Abstraction has 7911 states and 23024 transitions. [2021-03-11 00:12:04,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:04,004 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 23024 transitions. [2021-03-11 00:12:04,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:04,014 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:04,014 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:04,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:04,216 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:04,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:04,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1774559878, now seen corresponding path program 49 times [2021-03-11 00:12:04,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:04,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801177527] [2021-03-11 00:12:04,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:04,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:12:04,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801177527] [2021-03-11 00:12:04,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702789778] [2021-03-11 00:12:04,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:04,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:04,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:04,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:04,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:04,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-03-11 00:12:04,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327458487] [2021-03-11 00:12:04,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:12:04,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:04,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:12:04,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:12:04,547 INFO L87 Difference]: Start difference. First operand 7911 states and 23024 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2021-03-11 00:12:04,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:04,781 INFO L93 Difference]: Finished difference Result 8695 states and 25141 transitions. [2021-03-11 00:12:04,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:12:04,783 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:04,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:04,798 INFO L225 Difference]: With dead ends: 8695 [2021-03-11 00:12:04,798 INFO L226 Difference]: Without dead ends: 8578 [2021-03-11 00:12:04,798 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 232.7ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:12:04,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8578 states. [2021-03-11 00:12:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8578 to 8323. [2021-03-11 00:12:04,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8323 states, 8322 states have (on average 2.918048546022591) internal successors, (24284), 8322 states have internal predecessors, (24284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:04,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8323 states to 8323 states and 24284 transitions. [2021-03-11 00:12:04,945 INFO L78 Accepts]: Start accepts. Automaton has 8323 states and 24284 transitions. Word has length 34 [2021-03-11 00:12:04,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:04,945 INFO L480 AbstractCegarLoop]: Abstraction has 8323 states and 24284 transitions. [2021-03-11 00:12:04,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 18 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) [2021-03-11 00:12:04,945 INFO L276 IsEmpty]: Start isEmpty. Operand 8323 states and 24284 transitions. [2021-03-11 00:12:04,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:04,955 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:04,955 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:05,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-03-11 00:12:05,159 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:05,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:05,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1520972218, now seen corresponding path program 50 times [2021-03-11 00:12:05,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:05,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177731973] [2021-03-11 00:12:05,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:05,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177731973] [2021-03-11 00:12:05,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859905307] [2021-03-11 00:12:05,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:12:05,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:12:05,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:05,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:05,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:05,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:05,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:12:05,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972423947] [2021-03-11 00:12:05,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:12:05,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:05,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:12:05,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:12:05,550 INFO L87 Difference]: Start difference. First operand 8323 states and 24284 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:05,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:05,773 INFO L93 Difference]: Finished difference Result 8641 states and 24990 transitions. [2021-03-11 00:12:05,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:12:05,773 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:05,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:05,786 INFO L225 Difference]: With dead ends: 8641 [2021-03-11 00:12:05,786 INFO L226 Difference]: Without dead ends: 8565 [2021-03-11 00:12:05,786 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 283.5ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:12:05,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8565 states. [2021-03-11 00:12:05,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8565 to 8317. [2021-03-11 00:12:05,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8317 states, 8316 states have (on average 2.9183501683501682) internal successors, (24269), 8316 states have internal predecessors, (24269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:05,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8317 states to 8317 states and 24269 transitions. [2021-03-11 00:12:05,900 INFO L78 Accepts]: Start accepts. Automaton has 8317 states and 24269 transitions. Word has length 34 [2021-03-11 00:12:05,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:05,900 INFO L480 AbstractCegarLoop]: Abstraction has 8317 states and 24269 transitions. [2021-03-11 00:12:05,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:05,900 INFO L276 IsEmpty]: Start isEmpty. Operand 8317 states and 24269 transitions. [2021-03-11 00:12:05,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:05,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:05,910 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:06,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:06,111 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:06,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:06,111 INFO L82 PathProgramCache]: Analyzing trace with hash -339756294, now seen corresponding path program 51 times [2021-03-11 00:12:06,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:06,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080175364] [2021-03-11 00:12:06,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:06,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080175364] [2021-03-11 00:12:06,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49304652] [2021-03-11 00:12:06,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:06,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:12:06,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:06,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:06,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:06,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:06,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-03-11 00:12:06,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027500606] [2021-03-11 00:12:06,403 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:12:06,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:06,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:12:06,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:12:06,403 INFO L87 Difference]: Start difference. First operand 8317 states and 24269 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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) [2021-03-11 00:12:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:06,576 INFO L93 Difference]: Finished difference Result 12332 states and 36170 transitions. [2021-03-11 00:12:06,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:12:06,576 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:06,595 INFO L225 Difference]: With dead ends: 12332 [2021-03-11 00:12:06,595 INFO L226 Difference]: Without dead ends: 12295 [2021-03-11 00:12:06,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:12:06,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12295 states. [2021-03-11 00:12:06,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12295 to 8325. [2021-03-11 00:12:06,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8325 states, 8324 states have (on average 2.917948101874099) internal successors, (24289), 8324 states have internal predecessors, (24289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:06,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8325 states to 8325 states and 24289 transitions. [2021-03-11 00:12:06,765 INFO L78 Accepts]: Start accepts. Automaton has 8325 states and 24289 transitions. Word has length 34 [2021-03-11 00:12:06,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:06,765 INFO L480 AbstractCegarLoop]: Abstraction has 8325 states and 24289 transitions. [2021-03-11 00:12:06,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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) [2021-03-11 00:12:06,765 INFO L276 IsEmpty]: Start isEmpty. Operand 8325 states and 24289 transitions. [2021-03-11 00:12:06,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:06,774 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:06,774 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:06,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:06,975 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:06,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:06,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2051845890, now seen corresponding path program 52 times [2021-03-11 00:12:06,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:06,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104354141] [2021-03-11 00:12:06,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:07,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:07,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104354141] [2021-03-11 00:12:07,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962225596] [2021-03-11 00:12:07,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:07,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:12:07,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:07,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:07,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:07,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:07,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:07,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-03-11 00:12:07,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999405102] [2021-03-11 00:12:07,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:12:07,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:07,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:12:07,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:12:07,313 INFO L87 Difference]: Start difference. First operand 8325 states and 24289 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:07,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:07,477 INFO L93 Difference]: Finished difference Result 12300 states and 36126 transitions. [2021-03-11 00:12:07,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-11 00:12:07,478 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:07,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:07,496 INFO L225 Difference]: With dead ends: 12300 [2021-03-11 00:12:07,496 INFO L226 Difference]: Without dead ends: 12263 [2021-03-11 00:12:07,496 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 225.0ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:12:07,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12263 states. [2021-03-11 00:12:07,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12263 to 8347. [2021-03-11 00:12:07,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8347 states, 8346 states have (on average 2.9180445722501798) internal successors, (24354), 8346 states have internal predecessors, (24354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:07,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8347 states to 8347 states and 24354 transitions. [2021-03-11 00:12:07,624 INFO L78 Accepts]: Start accepts. Automaton has 8347 states and 24354 transitions. Word has length 34 [2021-03-11 00:12:07,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:07,624 INFO L480 AbstractCegarLoop]: Abstraction has 8347 states and 24354 transitions. [2021-03-11 00:12:07,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:07,624 INFO L276 IsEmpty]: Start isEmpty. Operand 8347 states and 24354 transitions. [2021-03-11 00:12:07,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:07,634 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:07,634 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:07,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:07,836 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:07,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:07,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1363343686, now seen corresponding path program 53 times [2021-03-11 00:12:07,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:07,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703220033] [2021-03-11 00:12:07,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:07,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:07,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703220033] [2021-03-11 00:12:07,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385308564] [2021-03-11 00:12:07,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:07,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-11 00:12:07,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:07,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:12:07,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:08,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:08,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:12:08,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200894981] [2021-03-11 00:12:08,143 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:12:08,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:08,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:12:08,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:12:08,143 INFO L87 Difference]: Start difference. First operand 8347 states and 24354 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:08,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:08,400 INFO L93 Difference]: Finished difference Result 12845 states and 37674 transitions. [2021-03-11 00:12:08,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:12:08,401 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:08,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:08,421 INFO L225 Difference]: With dead ends: 12845 [2021-03-11 00:12:08,422 INFO L226 Difference]: Without dead ends: 12771 [2021-03-11 00:12:08,422 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 209.6ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:12:08,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2021-03-11 00:12:08,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 8781. [2021-03-11 00:12:08,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8781 states, 8780 states have (on average 2.9197038724373576) internal successors, (25635), 8780 states have internal predecessors, (25635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:08,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8781 states to 8781 states and 25635 transitions. [2021-03-11 00:12:08,636 INFO L78 Accepts]: Start accepts. Automaton has 8781 states and 25635 transitions. Word has length 34 [2021-03-11 00:12:08,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:08,636 INFO L480 AbstractCegarLoop]: Abstraction has 8781 states and 25635 transitions. [2021-03-11 00:12:08,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:08,636 INFO L276 IsEmpty]: Start isEmpty. Operand 8781 states and 25635 transitions. [2021-03-11 00:12:08,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:08,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:08,647 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:08,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:08,848 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:08,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:08,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1176620350, now seen corresponding path program 54 times [2021-03-11 00:12:08,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:08,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604970508] [2021-03-11 00:12:08,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:08,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:08,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604970508] [2021-03-11 00:12:08,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820396840] [2021-03-11 00:12:08,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:08,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:12:08,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:08,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:08,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:09,193 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:09,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:09,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-03-11 00:12:09,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602060374] [2021-03-11 00:12:09,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:12:09,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:09,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:12:09,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:12:09,194 INFO L87 Difference]: Start difference. First operand 8781 states and 25635 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:09,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:09,548 INFO L93 Difference]: Finished difference Result 13891 states and 40747 transitions. [2021-03-11 00:12:09,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:12:09,549 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:09,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:09,572 INFO L225 Difference]: With dead ends: 13891 [2021-03-11 00:12:09,572 INFO L226 Difference]: Without dead ends: 13801 [2021-03-11 00:12:09,572 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 298.5ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:12:09,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13801 states. [2021-03-11 00:12:09,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13801 to 9593. [2021-03-11 00:12:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9593 states, 9592 states have (on average 2.9265012510425357) internal successors, (28071), 9592 states have internal predecessors, (28071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:09,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9593 states to 9593 states and 28071 transitions. [2021-03-11 00:12:09,726 INFO L78 Accepts]: Start accepts. Automaton has 9593 states and 28071 transitions. Word has length 34 [2021-03-11 00:12:09,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:09,726 INFO L480 AbstractCegarLoop]: Abstraction has 9593 states and 28071 transitions. [2021-03-11 00:12:09,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:09,727 INFO L276 IsEmpty]: Start isEmpty. Operand 9593 states and 28071 transitions. [2021-03-11 00:12:09,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:09,744 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:09,744 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:09,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-03-11 00:12:09,944 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:09,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1057537338, now seen corresponding path program 55 times [2021-03-11 00:12:09,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:09,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693931172] [2021-03-11 00:12:09,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:10,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693931172] [2021-03-11 00:12:10,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697150008] [2021-03-11 00:12:10,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:10,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:10,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:10,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:10,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-03-11 00:12:10,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113551194] [2021-03-11 00:12:10,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:12:10,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:10,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:12:10,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:12:10,258 INFO L87 Difference]: Start difference. First operand 9593 states and 28071 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:10,552 INFO L93 Difference]: Finished difference Result 13916 states and 40787 transitions. [2021-03-11 00:12:10,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:12:10,552 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:10,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:10,576 INFO L225 Difference]: With dead ends: 13916 [2021-03-11 00:12:10,576 INFO L226 Difference]: Without dead ends: 13814 [2021-03-11 00:12:10,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 261.5ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:12:10,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13814 states. [2021-03-11 00:12:10,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13814 to 9193. [2021-03-11 00:12:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9193 states, 9192 states have (on average 2.922432550043516) internal successors, (26863), 9192 states have internal predecessors, (26863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:10,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9193 states to 9193 states and 26863 transitions. [2021-03-11 00:12:10,773 INFO L78 Accepts]: Start accepts. Automaton has 9193 states and 26863 transitions. Word has length 34 [2021-03-11 00:12:10,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:10,773 INFO L480 AbstractCegarLoop]: Abstraction has 9193 states and 26863 transitions. [2021-03-11 00:12:10,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:10,774 INFO L276 IsEmpty]: Start isEmpty. Operand 9193 states and 26863 transitions. [2021-03-11 00:12:10,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:10,785 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:10,785 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:10,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:10,986 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:10,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:10,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1063331952, now seen corresponding path program 56 times [2021-03-11 00:12:10,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:10,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388882961] [2021-03-11 00:12:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:11,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388882961] [2021-03-11 00:12:11,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576263500] [2021-03-11 00:12:11,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:11,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:12:11,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:11,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:11,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:11,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:11,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:11,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-03-11 00:12:11,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796116027] [2021-03-11 00:12:11,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:12:11,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:11,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:12:11,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:12:11,359 INFO L87 Difference]: Start difference. First operand 9193 states and 26863 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:11,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:11,569 INFO L93 Difference]: Finished difference Result 10245 states and 29682 transitions. [2021-03-11 00:12:11,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:12:11,569 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:11,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:11,586 INFO L225 Difference]: With dead ends: 10245 [2021-03-11 00:12:11,586 INFO L226 Difference]: Without dead ends: 10171 [2021-03-11 00:12:11,586 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 253.0ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:12:11,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10171 states. [2021-03-11 00:12:11,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10171 to 9511. [2021-03-11 00:12:11,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9511 states, 9510 states have (on average 2.9251314405888538) internal successors, (27818), 9510 states have internal predecessors, (27818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9511 states to 9511 states and 27818 transitions. [2021-03-11 00:12:11,711 INFO L78 Accepts]: Start accepts. Automaton has 9511 states and 27818 transitions. Word has length 34 [2021-03-11 00:12:11,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:11,711 INFO L480 AbstractCegarLoop]: Abstraction has 9511 states and 27818 transitions. [2021-03-11 00:12:11,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:11,712 INFO L276 IsEmpty]: Start isEmpty. Operand 9511 states and 27818 transitions. [2021-03-11 00:12:11,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:11,724 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:11,724 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:11,924 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:11,924 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:11,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:11,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1983656864, now seen corresponding path program 57 times [2021-03-11 00:12:11,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:11,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256301932] [2021-03-11 00:12:11,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:12,020 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:12,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256301932] [2021-03-11 00:12:12,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786911214] [2021-03-11 00:12:12,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:12,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:12:12,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:12,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:12,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:12,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:12,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-11 00:12:12,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476588798] [2021-03-11 00:12:12,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:12:12,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:12,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:12:12,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:12:12,234 INFO L87 Difference]: Start difference. First operand 9511 states and 27818 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:12,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:12,420 INFO L93 Difference]: Finished difference Result 10671 states and 30957 transitions. [2021-03-11 00:12:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:12:12,420 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:12,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:12,438 INFO L225 Difference]: With dead ends: 10671 [2021-03-11 00:12:12,438 INFO L226 Difference]: Without dead ends: 10597 [2021-03-11 00:12:12,439 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:12:12,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10597 states. [2021-03-11 00:12:12,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10597 to 9447. [2021-03-11 00:12:12,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9447 states, 9446 states have (on average 2.9271649375396995) internal successors, (27650), 9446 states have internal predecessors, (27650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:12,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9447 states to 9447 states and 27650 transitions. [2021-03-11 00:12:12,620 INFO L78 Accepts]: Start accepts. Automaton has 9447 states and 27650 transitions. Word has length 34 [2021-03-11 00:12:12,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:12,620 INFO L480 AbstractCegarLoop]: Abstraction has 9447 states and 27650 transitions. [2021-03-11 00:12:12,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:12,620 INFO L276 IsEmpty]: Start isEmpty. Operand 9447 states and 27650 transitions. [2021-03-11 00:12:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:12,631 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:12,631 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:12,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:12,832 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:12,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:12,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1691006202, now seen corresponding path program 58 times [2021-03-11 00:12:12,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:12,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436352360] [2021-03-11 00:12:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:12,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436352360] [2021-03-11 00:12:12,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763130468] [2021-03-11 00:12:12,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:12,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:12:12,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:12,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:12:12,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:13,106 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:13,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:13,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-03-11 00:12:13,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230580778] [2021-03-11 00:12:13,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:12:13,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:13,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:12:13,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:12:13,107 INFO L87 Difference]: Start difference. First operand 9447 states and 27650 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:13,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:13,356 INFO L93 Difference]: Finished difference Result 11355 states and 33052 transitions. [2021-03-11 00:12:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:12:13,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:13,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:13,373 INFO L225 Difference]: With dead ends: 11355 [2021-03-11 00:12:13,374 INFO L226 Difference]: Without dead ends: 11265 [2021-03-11 00:12:13,374 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 207.0ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:12:13,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11265 states. [2021-03-11 00:12:13,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11265 to 10245. [2021-03-11 00:12:13,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10245 states, 10244 states have (on average 2.9350839515814133) internal successors, (30067), 10244 states have internal predecessors, (30067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10245 states to 10245 states and 30067 transitions. [2021-03-11 00:12:13,520 INFO L78 Accepts]: Start accepts. Automaton has 10245 states and 30067 transitions. Word has length 34 [2021-03-11 00:12:13,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:13,520 INFO L480 AbstractCegarLoop]: Abstraction has 10245 states and 30067 transitions. [2021-03-11 00:12:13,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:13,520 INFO L276 IsEmpty]: Start isEmpty. Operand 10245 states and 30067 transitions. [2021-03-11 00:12:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:13,533 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:13,533 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:13,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-03-11 00:12:13,734 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:13,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:13,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1810089214, now seen corresponding path program 59 times [2021-03-11 00:12:13,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:13,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875510238] [2021-03-11 00:12:13,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:12:13,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875510238] [2021-03-11 00:12:13,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855793324] [2021-03-11 00:12:13,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:12:13,860 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:12:13,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:13,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:13,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:14,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:14,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:14,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-03-11 00:12:14,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909257033] [2021-03-11 00:12:14,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:12:14,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:14,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:12:14,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:12:14,064 INFO L87 Difference]: Start difference. First operand 10245 states and 30067 transitions. Second operand has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:14,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:14,317 INFO L93 Difference]: Finished difference Result 11347 states and 33022 transitions. [2021-03-11 00:12:14,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:12:14,318 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:14,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:14,334 INFO L225 Difference]: With dead ends: 11347 [2021-03-11 00:12:14,335 INFO L226 Difference]: Without dead ends: 11231 [2021-03-11 00:12:14,335 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:12:14,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11231 states. [2021-03-11 00:12:14,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11231 to 10199. [2021-03-11 00:12:14,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10199 states, 10198 states have (on average 2.933516375759953) internal successors, (29916), 10198 states have internal predecessors, (29916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:14,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10199 states to 10199 states and 29916 transitions. [2021-03-11 00:12:14,539 INFO L78 Accepts]: Start accepts. Automaton has 10199 states and 29916 transitions. Word has length 34 [2021-03-11 00:12:14,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:14,539 INFO L480 AbstractCegarLoop]: Abstraction has 10199 states and 29916 transitions. [2021-03-11 00:12:14,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.7777777777777777) internal successors, (50), 17 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:14,540 INFO L276 IsEmpty]: Start isEmpty. Operand 10199 states and 29916 transitions. [2021-03-11 00:12:14,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:14,553 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:14,553 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:14,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:14,753 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:14,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:14,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1665801632, now seen corresponding path program 60 times [2021-03-11 00:12:14,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:14,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285515391] [2021-03-11 00:12:14,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:14,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285515391] [2021-03-11 00:12:14,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073020644] [2021-03-11 00:12:14,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:14,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:12:14,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:14,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:14,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:15,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:15,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-03-11 00:12:15,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921166135] [2021-03-11 00:12:15,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:12:15,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:15,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:12:15,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:12:15,104 INFO L87 Difference]: Start difference. First operand 10199 states and 29916 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:15,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:15,398 INFO L93 Difference]: Finished difference Result 11049 states and 32066 transitions. [2021-03-11 00:12:15,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:12:15,399 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:15,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:15,415 INFO L225 Difference]: With dead ends: 11049 [2021-03-11 00:12:15,415 INFO L226 Difference]: Without dead ends: 10932 [2021-03-11 00:12:15,415 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 265.0ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:12:15,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10932 states. [2021-03-11 00:12:15,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10932 to 9709. [2021-03-11 00:12:15,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9709 states, 9708 states have (on average 2.930057684384013) internal successors, (28445), 9708 states have internal predecessors, (28445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:15,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9709 states to 9709 states and 28445 transitions. [2021-03-11 00:12:15,574 INFO L78 Accepts]: Start accepts. Automaton has 9709 states and 28445 transitions. Word has length 34 [2021-03-11 00:12:15,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:15,574 INFO L480 AbstractCegarLoop]: Abstraction has 9709 states and 28445 transitions. [2021-03-11 00:12:15,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:15,575 INFO L276 IsEmpty]: Start isEmpty. Operand 9709 states and 28445 transitions. [2021-03-11 00:12:15,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:15,586 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:15,587 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:15,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-11 00:12:15,787 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:15,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:15,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1957855712, now seen corresponding path program 61 times [2021-03-11 00:12:15,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:15,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898857690] [2021-03-11 00:12:15,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:15,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:15,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898857690] [2021-03-11 00:12:15,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529098037] [2021-03-11 00:12:15,921 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:12:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:15,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:15,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:16,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:16,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:12:16,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349679731] [2021-03-11 00:12:16,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:12:16,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:16,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:12:16,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:12:16,175 INFO L87 Difference]: Start difference. First operand 9709 states and 28445 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:16,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:16,426 INFO L93 Difference]: Finished difference Result 11021 states and 32116 transitions. [2021-03-11 00:12:16,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:12:16,427 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:16,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:16,451 INFO L225 Difference]: With dead ends: 11021 [2021-03-11 00:12:16,451 INFO L226 Difference]: Without dead ends: 10927 [2021-03-11 00:12:16,451 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 286.9ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:12:16,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10927 states. [2021-03-11 00:12:16,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10927 to 9881. [2021-03-11 00:12:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9881 states, 9880 states have (on average 2.9322874493927125) internal successors, (28971), 9880 states have internal predecessors, (28971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:16,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9881 states to 9881 states and 28971 transitions. [2021-03-11 00:12:16,662 INFO L78 Accepts]: Start accepts. Automaton has 9881 states and 28971 transitions. Word has length 34 [2021-03-11 00:12:16,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:16,662 INFO L480 AbstractCegarLoop]: Abstraction has 9881 states and 28971 transitions. [2021-03-11 00:12:16,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:16,663 INFO L276 IsEmpty]: Start isEmpty. Operand 9881 states and 28971 transitions. [2021-03-11 00:12:16,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:16,679 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:16,680 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:16,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-11 00:12:16,899 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:16,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:16,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1517139066, now seen corresponding path program 62 times [2021-03-11 00:12:16,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:16,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647931119] [2021-03-11 00:12:16,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:16,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:17,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647931119] [2021-03-11 00:12:17,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835747524] [2021-03-11 00:12:17,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:17,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:12:17,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:17,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:17,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:17,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:17,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:17,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-03-11 00:12:17,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284946368] [2021-03-11 00:12:17,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:12:17,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:17,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:12:17,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:12:17,227 INFO L87 Difference]: Start difference. First operand 9881 states and 28971 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:17,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:17,507 INFO L93 Difference]: Finished difference Result 10687 states and 31153 transitions. [2021-03-11 00:12:17,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:12:17,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:17,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:17,522 INFO L225 Difference]: With dead ends: 10687 [2021-03-11 00:12:17,522 INFO L226 Difference]: Without dead ends: 10579 [2021-03-11 00:12:17,522 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:12:17,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10579 states. [2021-03-11 00:12:17,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10579 to 8897. [2021-03-11 00:12:17,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8897 states, 8896 states have (on average 2.9333408273381294) internal successors, (26095), 8896 states have internal predecessors, (26095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:17,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8897 states to 8897 states and 26095 transitions. [2021-03-11 00:12:17,645 INFO L78 Accepts]: Start accepts. Automaton has 8897 states and 26095 transitions. Word has length 34 [2021-03-11 00:12:17,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:17,645 INFO L480 AbstractCegarLoop]: Abstraction has 8897 states and 26095 transitions. [2021-03-11 00:12:17,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:17,645 INFO L276 IsEmpty]: Start isEmpty. Operand 8897 states and 26095 transitions. [2021-03-11 00:12:17,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:17,656 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:17,656 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:17,856 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-03-11 00:12:17,856 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:17,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:17,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1039269088, now seen corresponding path program 63 times [2021-03-11 00:12:17,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:17,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949906233] [2021-03-11 00:12:17,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:17,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:17,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949906233] [2021-03-11 00:12:17,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444303296] [2021-03-11 00:12:17,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:12:17,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-11 00:12:17,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:17,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:17,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:18,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:18,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 17 [2021-03-11 00:12:18,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005739573] [2021-03-11 00:12:18,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:12:18,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:18,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:12:18,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:12:18,192 INFO L87 Difference]: Start difference. First operand 8897 states and 26095 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:18,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:18,459 INFO L93 Difference]: Finished difference Result 10521 states and 30797 transitions. [2021-03-11 00:12:18,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:12:18,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:18,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:18,475 INFO L225 Difference]: With dead ends: 10521 [2021-03-11 00:12:18,476 INFO L226 Difference]: Without dead ends: 10439 [2021-03-11 00:12:18,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:12:18,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10439 states. [2021-03-11 00:12:18,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10439 to 10093. [2021-03-11 00:12:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10093 states, 10092 states have (on average 2.9440150614347997) internal successors, (29711), 10092 states have internal predecessors, (29711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:18,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10093 states to 10093 states and 29711 transitions. [2021-03-11 00:12:18,609 INFO L78 Accepts]: Start accepts. Automaton has 10093 states and 29711 transitions. Word has length 34 [2021-03-11 00:12:18,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:18,609 INFO L480 AbstractCegarLoop]: Abstraction has 10093 states and 29711 transitions. [2021-03-11 00:12:18,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:18,609 INFO L276 IsEmpty]: Start isEmpty. Operand 10093 states and 29711 transitions. [2021-03-11 00:12:18,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:18,621 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:18,621 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:18,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:18,822 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:18,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:18,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1158352100, now seen corresponding path program 64 times [2021-03-11 00:12:18,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:18,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043749380] [2021-03-11 00:12:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:12:18,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043749380] [2021-03-11 00:12:18,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132192758] [2021-03-11 00:12:18,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:18,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:12:18,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:18,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:18,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:19,170 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:19,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:19,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 17 [2021-03-11 00:12:19,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459451838] [2021-03-11 00:12:19,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:12:19,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:19,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:12:19,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:12:19,172 INFO L87 Difference]: Start difference. First operand 10093 states and 29711 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:19,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:19,421 INFO L93 Difference]: Finished difference Result 10518 states and 30785 transitions. [2021-03-11 00:12:19,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:12:19,422 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:19,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:19,444 INFO L225 Difference]: With dead ends: 10518 [2021-03-11 00:12:19,445 INFO L226 Difference]: Without dead ends: 10406 [2021-03-11 00:12:19,445 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:12:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10406 states. [2021-03-11 00:12:19,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10406 to 9635. [2021-03-11 00:12:19,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9635 states, 9634 states have (on average 2.9383433672410213) internal successors, (28308), 9634 states have internal predecessors, (28308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:19,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9635 states to 9635 states and 28308 transitions. [2021-03-11 00:12:19,603 INFO L78 Accepts]: Start accepts. Automaton has 9635 states and 28308 transitions. Word has length 34 [2021-03-11 00:12:19,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:19,603 INFO L480 AbstractCegarLoop]: Abstraction has 9635 states and 28308 transitions. [2021-03-11 00:12:19,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:19,603 INFO L276 IsEmpty]: Start isEmpty. Operand 9635 states and 28308 transitions. [2021-03-11 00:12:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:19,615 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:19,615 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:19,815 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:19,815 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:19,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:19,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1014064518, now seen corresponding path program 65 times [2021-03-11 00:12:19,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:19,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12741225] [2021-03-11 00:12:19,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:12:19,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12741225] [2021-03-11 00:12:19,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668369399] [2021-03-11 00:12:19,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:19,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:12:19,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:19,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-03-11 00:12:19,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:20,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:20,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-11 00:12:20,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670964202] [2021-03-11 00:12:20,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:12:20,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:20,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:12:20,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:12:20,145 INFO L87 Difference]: Start difference. First operand 9635 states and 28308 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:20,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:20,461 INFO L93 Difference]: Finished difference Result 10415 states and 30415 transitions. [2021-03-11 00:12:20,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-11 00:12:20,461 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:20,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:20,479 INFO L225 Difference]: With dead ends: 10415 [2021-03-11 00:12:20,479 INFO L226 Difference]: Without dead ends: 10298 [2021-03-11 00:12:20,479 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 234.6ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:12:20,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10298 states. [2021-03-11 00:12:20,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10298 to 10047. [2021-03-11 00:12:20,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 2.943260999402747) internal successors, (29568), 10046 states have internal predecessors, (29568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 29568 transitions. [2021-03-11 00:12:20,619 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 29568 transitions. Word has length 34 [2021-03-11 00:12:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:20,619 INFO L480 AbstractCegarLoop]: Abstraction has 10047 states and 29568 transitions. [2021-03-11 00:12:20,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 29568 transitions. [2021-03-11 00:12:20,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-11 00:12:20,632 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:20,632 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:20,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:20,832 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:20,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:20,833 INFO L82 PathProgramCache]: Analyzing trace with hash -14629318, now seen corresponding path program 66 times [2021-03-11 00:12:20,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:20,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957468452] [2021-03-11 00:12:20,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:20,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957468452] [2021-03-11 00:12:20,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305132749] [2021-03-11 00:12:20,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:12:21,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:12:21,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:21,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:12:21,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:21,212 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:21,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:21,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-03-11 00:12:21,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038383497] [2021-03-11 00:12:21,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:12:21,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:21,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:12:21,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:12:21,214 INFO L87 Difference]: Start difference. First operand 10047 states and 29568 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:21,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:21,441 INFO L93 Difference]: Finished difference Result 10361 states and 30264 transitions. [2021-03-11 00:12:21,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-11 00:12:21,441 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-11 00:12:21,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:21,457 INFO L225 Difference]: With dead ends: 10361 [2021-03-11 00:12:21,457 INFO L226 Difference]: Without dead ends: 10285 [2021-03-11 00:12:21,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 275.5ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:12:21,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10285 states. [2021-03-11 00:12:21,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10285 to 8741. [2021-03-11 00:12:21,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8741 states, 8740 states have (on average 2.940846681922197) internal successors, (25703), 8740 states have internal predecessors, (25703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:21,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8741 states to 8741 states and 25703 transitions. [2021-03-11 00:12:21,579 INFO L78 Accepts]: Start accepts. Automaton has 8741 states and 25703 transitions. Word has length 34 [2021-03-11 00:12:21,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:21,579 INFO L480 AbstractCegarLoop]: Abstraction has 8741 states and 25703 transitions. [2021-03-11 00:12:21,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:21,579 INFO L276 IsEmpty]: Start isEmpty. Operand 8741 states and 25703 transitions. [2021-03-11 00:12:21,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:21,590 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:21,590 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:21,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-03-11 00:12:21,791 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:21,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:21,791 INFO L82 PathProgramCache]: Analyzing trace with hash -826580692, now seen corresponding path program 67 times [2021-03-11 00:12:21,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:21,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082084316] [2021-03-11 00:12:21,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:21,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082084316] [2021-03-11 00:12:21,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843745110] [2021-03-11 00:12:21,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:21,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:21,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:21,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:21,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:12:21,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732348624] [2021-03-11 00:12:21,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:12:21,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:21,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:12:21,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:12:21,945 INFO L87 Difference]: Start difference. First operand 8741 states and 25703 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:22,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:22,148 INFO L93 Difference]: Finished difference Result 12506 states and 36770 transitions. [2021-03-11 00:12:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:12:22,149 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:22,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:22,168 INFO L225 Difference]: With dead ends: 12506 [2021-03-11 00:12:22,168 INFO L226 Difference]: Without dead ends: 12506 [2021-03-11 00:12:22,168 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:12:22,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12506 states. [2021-03-11 00:12:22,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12506 to 9087. [2021-03-11 00:12:22,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9087 states, 9086 states have (on average 2.9369359454105215) internal successors, (26685), 9086 states have internal predecessors, (26685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:22,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9087 states to 9087 states and 26685 transitions. [2021-03-11 00:12:22,313 INFO L78 Accepts]: Start accepts. Automaton has 9087 states and 26685 transitions. Word has length 37 [2021-03-11 00:12:22,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:22,313 INFO L480 AbstractCegarLoop]: Abstraction has 9087 states and 26685 transitions. [2021-03-11 00:12:22,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:22,313 INFO L276 IsEmpty]: Start isEmpty. Operand 9087 states and 26685 transitions. [2021-03-11 00:12:22,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:22,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:22,325 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:22,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-03-11 00:12:22,527 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:22,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:22,527 INFO L82 PathProgramCache]: Analyzing trace with hash -179080118, now seen corresponding path program 68 times [2021-03-11 00:12:22,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:22,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049192423] [2021-03-11 00:12:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:22,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049192423] [2021-03-11 00:12:22,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045921626] [2021-03-11 00:12:22,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:22,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:12:22,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:22,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:22,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:22,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:22,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:12:22,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989976253] [2021-03-11 00:12:22,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:12:22,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:22,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:12:22,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:12:22,676 INFO L87 Difference]: Start difference. First operand 9087 states and 26685 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:22,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:22,888 INFO L93 Difference]: Finished difference Result 14863 states and 43287 transitions. [2021-03-11 00:12:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:12:22,889 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:22,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:22,910 INFO L225 Difference]: With dead ends: 14863 [2021-03-11 00:12:22,910 INFO L226 Difference]: Without dead ends: 14797 [2021-03-11 00:12:22,910 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:12:22,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14797 states. [2021-03-11 00:12:23,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14797 to 9087. [2021-03-11 00:12:23,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9087 states, 9086 states have (on average 2.935945410521682) internal successors, (26676), 9086 states have internal predecessors, (26676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:23,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9087 states to 9087 states and 26676 transitions. [2021-03-11 00:12:23,055 INFO L78 Accepts]: Start accepts. Automaton has 9087 states and 26676 transitions. Word has length 37 [2021-03-11 00:12:23,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:23,055 INFO L480 AbstractCegarLoop]: Abstraction has 9087 states and 26676 transitions. [2021-03-11 00:12:23,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:23,055 INFO L276 IsEmpty]: Start isEmpty. Operand 9087 states and 26676 transitions. [2021-03-11 00:12:23,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:23,066 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:23,066 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:23,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-03-11 00:12:23,267 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:23,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:23,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1381181770, now seen corresponding path program 69 times [2021-03-11 00:12:23,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:23,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113720210] [2021-03-11 00:12:23,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:23,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:23,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113720210] [2021-03-11 00:12:23,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845742386] [2021-03-11 00:12:23,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:23,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:12:23,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:23,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:23,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:23,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:23,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:12:23,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641354834] [2021-03-11 00:12:23,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:23,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:23,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:23,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:23,421 INFO L87 Difference]: Start difference. First operand 9087 states and 26676 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:23,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:23,937 INFO L93 Difference]: Finished difference Result 18726 states and 53866 transitions. [2021-03-11 00:12:23,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:12:23,938 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:23,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:23,969 INFO L225 Difference]: With dead ends: 18726 [2021-03-11 00:12:23,969 INFO L226 Difference]: Without dead ends: 18720 [2021-03-11 00:12:23,970 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 341.0ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:12:23,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18720 states. [2021-03-11 00:12:24,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18720 to 12042. [2021-03-11 00:12:24,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12042 states, 12041 states have (on average 2.9554854247986047) internal successors, (35587), 12041 states have internal predecessors, (35587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12042 states to 12042 states and 35587 transitions. [2021-03-11 00:12:24,225 INFO L78 Accepts]: Start accepts. Automaton has 12042 states and 35587 transitions. Word has length 37 [2021-03-11 00:12:24,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:24,225 INFO L480 AbstractCegarLoop]: Abstraction has 12042 states and 35587 transitions. [2021-03-11 00:12:24,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 12042 states and 35587 transitions. [2021-03-11 00:12:24,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:24,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:24,242 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:24,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:24,442 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:24,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:24,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1170484724, now seen corresponding path program 70 times [2021-03-11 00:12:24,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:24,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698728452] [2021-03-11 00:12:24,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:24,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698728452] [2021-03-11 00:12:24,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261336618] [2021-03-11 00:12:24,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:24,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:12:24,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:24,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:24,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:24,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:24,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:12:24,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082523051] [2021-03-11 00:12:24,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:24,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:24,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:24,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:24,593 INFO L87 Difference]: Start difference. First operand 12042 states and 35587 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:25,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:25,068 INFO L93 Difference]: Finished difference Result 16231 states and 47060 transitions. [2021-03-11 00:12:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:12:25,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:25,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:25,105 INFO L225 Difference]: With dead ends: 16231 [2021-03-11 00:12:25,105 INFO L226 Difference]: Without dead ends: 16219 [2021-03-11 00:12:25,106 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 269.4ms TimeCoverageRelationStatistics Valid=417, Invalid=773, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:12:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16219 states. [2021-03-11 00:12:25,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16219 to 13102. [2021-03-11 00:12:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13102 states, 13101 states have (on average 2.9656514769864897) internal successors, (38853), 13101 states have internal predecessors, (38853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:25,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13102 states to 13102 states and 38853 transitions. [2021-03-11 00:12:25,476 INFO L78 Accepts]: Start accepts. Automaton has 13102 states and 38853 transitions. Word has length 37 [2021-03-11 00:12:25,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:25,476 INFO L480 AbstractCegarLoop]: Abstraction has 13102 states and 38853 transitions. [2021-03-11 00:12:25,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:25,476 INFO L276 IsEmpty]: Start isEmpty. Operand 13102 states and 38853 transitions. [2021-03-11 00:12:25,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:25,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:25,494 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:25,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-03-11 00:12:25,694 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:25,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:25,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1899236542, now seen corresponding path program 71 times [2021-03-11 00:12:25,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:25,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083347988] [2021-03-11 00:12:25,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:25,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:25,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083347988] [2021-03-11 00:12:25,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652903889] [2021-03-11 00:12:25,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:25,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:12:25,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:25,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:25,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:25,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:25,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:12:25,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844430525] [2021-03-11 00:12:25,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:25,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:25,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:25,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:25,872 INFO L87 Difference]: Start difference. First operand 13102 states and 38853 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:26,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:26,400 INFO L93 Difference]: Finished difference Result 16682 states and 48163 transitions. [2021-03-11 00:12:26,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:12:26,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:26,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:26,429 INFO L225 Difference]: With dead ends: 16682 [2021-03-11 00:12:26,429 INFO L226 Difference]: Without dead ends: 16682 [2021-03-11 00:12:26,429 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 317.2ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:12:26,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16682 states. [2021-03-11 00:12:26,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16682 to 11650. [2021-03-11 00:12:26,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11650 states, 11649 states have (on average 2.9569061722036225) internal successors, (34445), 11649 states have internal predecessors, (34445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:26,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 34445 transitions. [2021-03-11 00:12:26,637 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 34445 transitions. Word has length 37 [2021-03-11 00:12:26,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:26,637 INFO L480 AbstractCegarLoop]: Abstraction has 11650 states and 34445 transitions. [2021-03-11 00:12:26,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:26,637 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 34445 transitions. [2021-03-11 00:12:26,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:26,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:26,652 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:26,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:26,852 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:26,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1522265388, now seen corresponding path program 72 times [2021-03-11 00:12:26,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:26,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071378546] [2021-03-11 00:12:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:26,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071378546] [2021-03-11 00:12:26,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442828247] [2021-03-11 00:12:26,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:26,914 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:12:26,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:26,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:26,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:26,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:26,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:26,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:12:26,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206414217] [2021-03-11 00:12:26,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:26,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:26,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:26,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:26,999 INFO L87 Difference]: Start difference. First operand 11650 states and 34445 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:27,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:27,424 INFO L93 Difference]: Finished difference Result 17986 states and 51918 transitions. [2021-03-11 00:12:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:12:27,425 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:27,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:27,453 INFO L225 Difference]: With dead ends: 17986 [2021-03-11 00:12:27,453 INFO L226 Difference]: Without dead ends: 17972 [2021-03-11 00:12:27,454 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 260.8ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:12:27,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17972 states. [2021-03-11 00:12:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17972 to 10490. [2021-03-11 00:12:27,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10490 states, 10489 states have (on average 2.9443226237010203) internal successors, (30883), 10489 states have internal predecessors, (30883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:27,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10490 states to 10490 states and 30883 transitions. [2021-03-11 00:12:27,664 INFO L78 Accepts]: Start accepts. Automaton has 10490 states and 30883 transitions. Word has length 37 [2021-03-11 00:12:27,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:27,664 INFO L480 AbstractCegarLoop]: Abstraction has 10490 states and 30883 transitions. [2021-03-11 00:12:27,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:27,664 INFO L276 IsEmpty]: Start isEmpty. Operand 10490 states and 30883 transitions. [2021-03-11 00:12:27,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:27,677 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:27,677 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:27,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:27,878 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:27,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:27,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1606664162, now seen corresponding path program 73 times [2021-03-11 00:12:27,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:27,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869857125] [2021-03-11 00:12:27,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:27,914 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:27,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869857125] [2021-03-11 00:12:27,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506124986] [2021-03-11 00:12:27,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:27,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:27,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:28,029 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:28,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:28,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:12:28,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455931593] [2021-03-11 00:12:28,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:28,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:28,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:28,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:28,103 INFO L87 Difference]: Start difference. First operand 10490 states and 30883 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:28,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:28,446 INFO L93 Difference]: Finished difference Result 17889 states and 51707 transitions. [2021-03-11 00:12:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:12:28,447 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:28,476 INFO L225 Difference]: With dead ends: 17889 [2021-03-11 00:12:28,476 INFO L226 Difference]: Without dead ends: 17833 [2021-03-11 00:12:28,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:12:28,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17833 states. [2021-03-11 00:12:28,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17833 to 11034. [2021-03-11 00:12:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11034 states, 11033 states have (on average 2.94162965648509) internal successors, (32455), 11033 states have internal predecessors, (32455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:28,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11034 states to 11034 states and 32455 transitions. [2021-03-11 00:12:28,684 INFO L78 Accepts]: Start accepts. Automaton has 11034 states and 32455 transitions. Word has length 37 [2021-03-11 00:12:28,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:28,684 INFO L480 AbstractCegarLoop]: Abstraction has 11034 states and 32455 transitions. [2021-03-11 00:12:28,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:28,685 INFO L276 IsEmpty]: Start isEmpty. Operand 11034 states and 32455 transitions. [2021-03-11 00:12:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:28,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:28,698 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:28,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:28,898 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:28,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:28,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1048265624, now seen corresponding path program 74 times [2021-03-11 00:12:28,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:28,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712890478] [2021-03-11 00:12:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:28,939 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:28,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712890478] [2021-03-11 00:12:28,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138989547] [2021-03-11 00:12:28,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:12:28,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:12:28,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:28,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:28,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:29,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:29,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:29,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:12:29,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29986562] [2021-03-11 00:12:29,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:29,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:29,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:29,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:29,077 INFO L87 Difference]: Start difference. First operand 11034 states and 32455 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:29,375 INFO L93 Difference]: Finished difference Result 16386 states and 47537 transitions. [2021-03-11 00:12:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:12:29,376 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:29,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:29,415 INFO L225 Difference]: With dead ends: 16386 [2021-03-11 00:12:29,415 INFO L226 Difference]: Without dead ends: 16337 [2021-03-11 00:12:29,416 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 197.5ms TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:12:29,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16337 states. [2021-03-11 00:12:29,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16337 to 11048. [2021-03-11 00:12:29,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11048 states, 11047 states have (on average 2.9385353489635193) internal successors, (32462), 11047 states have internal predecessors, (32462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:29,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11048 states to 11048 states and 32462 transitions. [2021-03-11 00:12:29,717 INFO L78 Accepts]: Start accepts. Automaton has 11048 states and 32462 transitions. Word has length 37 [2021-03-11 00:12:29,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:29,717 INFO L480 AbstractCegarLoop]: Abstraction has 11048 states and 32462 transitions. [2021-03-11 00:12:29,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:29,717 INFO L276 IsEmpty]: Start isEmpty. Operand 11048 states and 32462 transitions. [2021-03-11 00:12:29,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:29,737 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:29,737 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:29,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:29,937 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:29,938 INFO L82 PathProgramCache]: Analyzing trace with hash -272513428, now seen corresponding path program 75 times [2021-03-11 00:12:29,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:29,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245943512] [2021-03-11 00:12:29,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:29,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245943512] [2021-03-11 00:12:29,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126548885] [2021-03-11 00:12:29,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:29,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-11 00:12:29,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:29,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:29,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:30,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:30,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-11 00:12:30,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539160874] [2021-03-11 00:12:30,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:12:30,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:30,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:12:30,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:12:30,101 INFO L87 Difference]: Start difference. First operand 11048 states and 32462 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:30,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:30,503 INFO L93 Difference]: Finished difference Result 16071 states and 46102 transitions. [2021-03-11 00:12:30,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:12:30,504 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:30,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:30,527 INFO L225 Difference]: With dead ends: 16071 [2021-03-11 00:12:30,527 INFO L226 Difference]: Without dead ends: 16011 [2021-03-11 00:12:30,528 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 293.0ms TimeCoverageRelationStatistics Valid=475, Invalid=1007, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:12:30,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16011 states. [2021-03-11 00:12:30,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16011 to 11326. [2021-03-11 00:12:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11326 states, 11325 states have (on average 2.928653421633554) internal successors, (33167), 11325 states have internal predecessors, (33167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11326 states to 11326 states and 33167 transitions. [2021-03-11 00:12:30,812 INFO L78 Accepts]: Start accepts. Automaton has 11326 states and 33167 transitions. Word has length 37 [2021-03-11 00:12:30,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:30,813 INFO L480 AbstractCegarLoop]: Abstraction has 11326 states and 33167 transitions. [2021-03-11 00:12:30,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 11326 states and 33167 transitions. [2021-03-11 00:12:30,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:30,828 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:30,828 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:31,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:31,029 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:31,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:31,029 INFO L82 PathProgramCache]: Analyzing trace with hash 144146212, now seen corresponding path program 76 times [2021-03-11 00:12:31,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:31,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489570084] [2021-03-11 00:12:31,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:31,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489570084] [2021-03-11 00:12:31,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303481860] [2021-03-11 00:12:31,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:31,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:12:31,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:31,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:31,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:31,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:31,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-11 00:12:31,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011597425] [2021-03-11 00:12:31,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:31,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:31,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:31,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:31,182 INFO L87 Difference]: Start difference. First operand 11326 states and 33167 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:31,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:31,652 INFO L93 Difference]: Finished difference Result 16740 states and 47681 transitions. [2021-03-11 00:12:31,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:12:31,653 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:31,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:31,680 INFO L225 Difference]: With dead ends: 16740 [2021-03-11 00:12:31,681 INFO L226 Difference]: Without dead ends: 16733 [2021-03-11 00:12:31,681 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:12:31,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16733 states. [2021-03-11 00:12:31,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16733 to 11874. [2021-03-11 00:12:31,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11874 states, 11873 states have (on average 2.926219152699402) internal successors, (34743), 11873 states have internal predecessors, (34743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11874 states to 11874 states and 34743 transitions. [2021-03-11 00:12:31,901 INFO L78 Accepts]: Start accepts. Automaton has 11874 states and 34743 transitions. Word has length 37 [2021-03-11 00:12:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:31,902 INFO L480 AbstractCegarLoop]: Abstraction has 11874 states and 34743 transitions. [2021-03-11 00:12:31,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand 11874 states and 34743 transitions. [2021-03-11 00:12:31,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:31,917 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:31,917 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:32,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-03-11 00:12:32,118 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:32,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:32,118 INFO L82 PathProgramCache]: Analyzing trace with hash -198586448, now seen corresponding path program 77 times [2021-03-11 00:12:32,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:32,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924957471] [2021-03-11 00:12:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:32,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924957471] [2021-03-11 00:12:32,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576309896] [2021-03-11 00:12:32,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:32,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:12:32,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:32,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:32,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:32,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:32,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-11 00:12:32,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210941893] [2021-03-11 00:12:32,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:12:32,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:32,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:12:32,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:12:32,285 INFO L87 Difference]: Start difference. First operand 11874 states and 34743 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:32,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:32,769 INFO L93 Difference]: Finished difference Result 17514 states and 50064 transitions. [2021-03-11 00:12:32,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:12:32,770 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:32,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:32,799 INFO L225 Difference]: With dead ends: 17514 [2021-03-11 00:12:32,799 INFO L226 Difference]: Without dead ends: 17400 [2021-03-11 00:12:32,800 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 348.7ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:12:32,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17400 states. [2021-03-11 00:12:32,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17400 to 13318. [2021-03-11 00:12:32,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13318 states, 13317 states have (on average 2.9225050687091687) internal successors, (38919), 13317 states have internal predecessors, (38919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:33,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13318 states to 13318 states and 38919 transitions. [2021-03-11 00:12:33,023 INFO L78 Accepts]: Start accepts. Automaton has 13318 states and 38919 transitions. Word has length 37 [2021-03-11 00:12:33,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:33,023 INFO L480 AbstractCegarLoop]: Abstraction has 13318 states and 38919 transitions. [2021-03-11 00:12:33,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:33,023 INFO L276 IsEmpty]: Start isEmpty. Operand 13318 states and 38919 transitions. [2021-03-11 00:12:33,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:33,039 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:33,039 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:33,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-03-11 00:12:33,240 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:33,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:33,240 INFO L82 PathProgramCache]: Analyzing trace with hash 52875454, now seen corresponding path program 78 times [2021-03-11 00:12:33,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:33,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955085334] [2021-03-11 00:12:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:33,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955085334] [2021-03-11 00:12:33,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413729879] [2021-03-11 00:12:33,281 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:33,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:12:33,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:33,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:33,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:33,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:33,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-03-11 00:12:33,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67446042] [2021-03-11 00:12:33,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:33,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:33,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:33,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:33,421 INFO L87 Difference]: Start difference. First operand 13318 states and 38919 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:33,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:33,970 INFO L93 Difference]: Finished difference Result 21245 states and 60807 transitions. [2021-03-11 00:12:33,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:12:33,970 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:33,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:34,011 INFO L225 Difference]: With dead ends: 21245 [2021-03-11 00:12:34,011 INFO L226 Difference]: Without dead ends: 21238 [2021-03-11 00:12:34,015 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:12:34,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21238 states. [2021-03-11 00:12:34,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21238 to 17258. [2021-03-11 00:12:34,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17258 states, 17257 states have (on average 2.9188735006084485) internal successors, (50371), 17257 states have internal predecessors, (50371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17258 states to 17258 states and 50371 transitions. [2021-03-11 00:12:34,338 INFO L78 Accepts]: Start accepts. Automaton has 17258 states and 50371 transitions. Word has length 37 [2021-03-11 00:12:34,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:34,338 INFO L480 AbstractCegarLoop]: Abstraction has 17258 states and 50371 transitions. [2021-03-11 00:12:34,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:34,338 INFO L276 IsEmpty]: Start isEmpty. Operand 17258 states and 50371 transitions. [2021-03-11 00:12:34,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:34,362 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:34,362 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:34,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-03-11 00:12:34,563 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:34,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:34,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1380437010, now seen corresponding path program 79 times [2021-03-11 00:12:34,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:34,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456654475] [2021-03-11 00:12:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:34,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:34,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:34,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456654475] [2021-03-11 00:12:34,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687740436] [2021-03-11 00:12:34,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:34,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:34,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:34,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:34,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:12:34,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45573637] [2021-03-11 00:12:34,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:12:34,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:34,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:12:34,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:12:34,706 INFO L87 Difference]: Start difference. First operand 17258 states and 50371 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:34,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:34,918 INFO L93 Difference]: Finished difference Result 20016 states and 58107 transitions. [2021-03-11 00:12:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:12:34,919 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:34,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:34,952 INFO L225 Difference]: With dead ends: 20016 [2021-03-11 00:12:34,952 INFO L226 Difference]: Without dead ends: 20016 [2021-03-11 00:12:34,952 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:12:34,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20016 states. [2021-03-11 00:12:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20016 to 17472. [2021-03-11 00:12:35,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17472 states, 17471 states have (on average 2.9182073149791083) internal successors, (50984), 17471 states have internal predecessors, (50984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17472 states to 17472 states and 50984 transitions. [2021-03-11 00:12:35,250 INFO L78 Accepts]: Start accepts. Automaton has 17472 states and 50984 transitions. Word has length 37 [2021-03-11 00:12:35,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:35,250 INFO L480 AbstractCegarLoop]: Abstraction has 17472 states and 50984 transitions. [2021-03-11 00:12:35,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:35,251 INFO L276 IsEmpty]: Start isEmpty. Operand 17472 states and 50984 transitions. [2021-03-11 00:12:35,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:35,275 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:35,275 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:35,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:35,476 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:35,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:35,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1382409982, now seen corresponding path program 80 times [2021-03-11 00:12:35,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:35,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11151023] [2021-03-11 00:12:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:35,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11151023] [2021-03-11 00:12:35,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610738770] [2021-03-11 00:12:35,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:35,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:12:35,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:35,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:35,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:35,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:35,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:35,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-11 00:12:35,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406966046] [2021-03-11 00:12:35,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-11 00:12:35,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:35,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-11 00:12:35,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-03-11 00:12:35,620 INFO L87 Difference]: Start difference. First operand 17472 states and 50984 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:35,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:35,779 INFO L93 Difference]: Finished difference Result 21557 states and 62279 transitions. [2021-03-11 00:12:35,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-11 00:12:35,779 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:35,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:35,814 INFO L225 Difference]: With dead ends: 21557 [2021-03-11 00:12:35,814 INFO L226 Difference]: Without dead ends: 21503 [2021-03-11 00:12:35,814 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:12:35,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21503 states. [2021-03-11 00:12:36,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21503 to 17472. [2021-03-11 00:12:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17472 states, 17471 states have (on average 2.917749413313491) internal successors, (50976), 17471 states have internal predecessors, (50976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17472 states to 17472 states and 50976 transitions. [2021-03-11 00:12:36,212 INFO L78 Accepts]: Start accepts. Automaton has 17472 states and 50976 transitions. Word has length 37 [2021-03-11 00:12:36,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:36,212 INFO L480 AbstractCegarLoop]: Abstraction has 17472 states and 50976 transitions. [2021-03-11 00:12:36,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:36,212 INFO L276 IsEmpty]: Start isEmpty. Operand 17472 states and 50976 transitions. [2021-03-11 00:12:36,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:36,234 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:36,234 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:36,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-03-11 00:12:36,434 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:36,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:36,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1341647984, now seen corresponding path program 81 times [2021-03-11 00:12:36,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:36,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327345807] [2021-03-11 00:12:36,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:36,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:36,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327345807] [2021-03-11 00:12:36,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983446440] [2021-03-11 00:12:36,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:36,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:12:36,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:36,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:36,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:36,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:36,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:36,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:12:36,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088826216] [2021-03-11 00:12:36,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:36,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:36,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:36,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:36,581 INFO L87 Difference]: Start difference. First operand 17472 states and 50976 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:36,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:36,869 INFO L93 Difference]: Finished difference Result 19795 states and 57175 transitions. [2021-03-11 00:12:36,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-11 00:12:36,870 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:36,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:36,902 INFO L225 Difference]: With dead ends: 19795 [2021-03-11 00:12:36,902 INFO L226 Difference]: Without dead ends: 19795 [2021-03-11 00:12:36,903 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:12:36,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19795 states. [2021-03-11 00:12:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19795 to 17762. [2021-03-11 00:12:37,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17762 states, 17761 states have (on average 2.916446146050335) internal successors, (51799), 17761 states have internal predecessors, (51799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:37,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17762 states to 17762 states and 51799 transitions. [2021-03-11 00:12:37,215 INFO L78 Accepts]: Start accepts. Automaton has 17762 states and 51799 transitions. Word has length 37 [2021-03-11 00:12:37,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:37,215 INFO L480 AbstractCegarLoop]: Abstraction has 17762 states and 51799 transitions. [2021-03-11 00:12:37,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:37,215 INFO L276 IsEmpty]: Start isEmpty. Operand 17762 states and 51799 transitions. [2021-03-11 00:12:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:37,239 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:37,239 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:37,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:37,440 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:37,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:37,440 INFO L82 PathProgramCache]: Analyzing trace with hash -461813350, now seen corresponding path program 82 times [2021-03-11 00:12:37,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:37,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674346604] [2021-03-11 00:12:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:37,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:37,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674346604] [2021-03-11 00:12:37,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557919213] [2021-03-11 00:12:37,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:37,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:12:37,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:37,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:37,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:37,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:37,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:12:37,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695189453] [2021-03-11 00:12:37,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:37,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:37,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:37,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:37,578 INFO L87 Difference]: Start difference. First operand 17762 states and 51799 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:37,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:37,868 INFO L93 Difference]: Finished difference Result 22312 states and 64100 transitions. [2021-03-11 00:12:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:12:37,868 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:37,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:37,907 INFO L225 Difference]: With dead ends: 22312 [2021-03-11 00:12:37,907 INFO L226 Difference]: Without dead ends: 22270 [2021-03-11 00:12:37,907 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 199.1ms TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:12:37,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22270 states. [2021-03-11 00:12:38,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22270 to 18356. [2021-03-11 00:12:38,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18356 states, 18355 states have (on average 2.922800326886407) internal successors, (53648), 18355 states have internal predecessors, (53648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:38,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18356 states to 18356 states and 53648 transitions. [2021-03-11 00:12:38,243 INFO L78 Accepts]: Start accepts. Automaton has 18356 states and 53648 transitions. Word has length 37 [2021-03-11 00:12:38,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:38,243 INFO L480 AbstractCegarLoop]: Abstraction has 18356 states and 53648 transitions. [2021-03-11 00:12:38,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:38,243 INFO L276 IsEmpty]: Start isEmpty. Operand 18356 states and 53648 transitions. [2021-03-11 00:12:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:38,268 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:38,268 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:38,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-03-11 00:12:38,468 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:38,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:38,468 INFO L82 PathProgramCache]: Analyzing trace with hash -664281518, now seen corresponding path program 83 times [2021-03-11 00:12:38,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:38,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368730569] [2021-03-11 00:12:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:38,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:38,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368730569] [2021-03-11 00:12:38,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804585234] [2021-03-11 00:12:38,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:38,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:12:38,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:38,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:38,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:38,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:38,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:12:38,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262459449] [2021-03-11 00:12:38,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:38,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:38,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:38,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:38,629 INFO L87 Difference]: Start difference. First operand 18356 states and 53648 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:39,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:39,177 INFO L93 Difference]: Finished difference Result 23064 states and 66316 transitions. [2021-03-11 00:12:39,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:12:39,178 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:39,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:39,215 INFO L225 Difference]: With dead ends: 23064 [2021-03-11 00:12:39,215 INFO L226 Difference]: Without dead ends: 23064 [2021-03-11 00:12:39,216 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=425, Invalid=907, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:12:39,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23064 states. [2021-03-11 00:12:39,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23064 to 19500. [2021-03-11 00:12:39,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19500 states, 19499 states have (on average 2.919431765731576) internal successors, (56926), 19499 states have internal predecessors, (56926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:39,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19500 states to 19500 states and 56926 transitions. [2021-03-11 00:12:39,546 INFO L78 Accepts]: Start accepts. Automaton has 19500 states and 56926 transitions. Word has length 37 [2021-03-11 00:12:39,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:39,546 INFO L480 AbstractCegarLoop]: Abstraction has 19500 states and 56926 transitions. [2021-03-11 00:12:39,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:39,547 INFO L276 IsEmpty]: Start isEmpty. Operand 19500 states and 56926 transitions. [2021-03-11 00:12:39,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:39,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:39,574 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:39,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:39,779 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:39,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:39,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1702207848, now seen corresponding path program 84 times [2021-03-11 00:12:39,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:39,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129754615] [2021-03-11 00:12:39,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:39,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129754615] [2021-03-11 00:12:39,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241351696] [2021-03-11 00:12:39,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:39,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-11 00:12:39,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:39,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:39,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:39,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:39,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:39,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:12:39,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21590755] [2021-03-11 00:12:39,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:39,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:39,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:39,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:39,943 INFO L87 Difference]: Start difference. First operand 19500 states and 56926 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:40,386 INFO L93 Difference]: Finished difference Result 25828 states and 74407 transitions. [2021-03-11 00:12:40,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:12:40,391 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:40,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:40,442 INFO L225 Difference]: With dead ends: 25828 [2021-03-11 00:12:40,442 INFO L226 Difference]: Without dead ends: 25780 [2021-03-11 00:12:40,443 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 256.1ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:12:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25780 states. [2021-03-11 00:12:40,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25780 to 21966. [2021-03-11 00:12:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21966 states, 21965 states have (on average 2.9118597769178236) internal successors, (63959), 21965 states have internal predecessors, (63959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21966 states to 21966 states and 63959 transitions. [2021-03-11 00:12:40,839 INFO L78 Accepts]: Start accepts. Automaton has 21966 states and 63959 transitions. Word has length 37 [2021-03-11 00:12:40,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:40,839 INFO L480 AbstractCegarLoop]: Abstraction has 21966 states and 63959 transitions. [2021-03-11 00:12:40,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:40,839 INFO L276 IsEmpty]: Start isEmpty. Operand 21966 states and 63959 transitions. [2021-03-11 00:12:40,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:40,870 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:40,870 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:41,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:41,071 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:41,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:41,071 INFO L82 PathProgramCache]: Analyzing trace with hash 369493936, now seen corresponding path program 85 times [2021-03-11 00:12:41,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:41,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459366680] [2021-03-11 00:12:41,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:41,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:41,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459366680] [2021-03-11 00:12:41,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261053680] [2021-03-11 00:12:41,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:41,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:41,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:41,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:41,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:12:41,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92139664] [2021-03-11 00:12:41,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:41,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:41,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:41,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:41,225 INFO L87 Difference]: Start difference. First operand 21966 states and 63959 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:41,754 INFO L93 Difference]: Finished difference Result 26907 states and 77204 transitions. [2021-03-11 00:12:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:12:41,754 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:41,812 INFO L225 Difference]: With dead ends: 26907 [2021-03-11 00:12:41,812 INFO L226 Difference]: Without dead ends: 26907 [2021-03-11 00:12:41,812 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 312.6ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-03-11 00:12:41,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26907 states. [2021-03-11 00:12:42,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26907 to 23390. [2021-03-11 00:12:42,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23390 states, 23389 states have (on average 2.923639317627945) internal successors, (68381), 23389 states have internal predecessors, (68381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23390 states to 23390 states and 68381 transitions. [2021-03-11 00:12:42,378 INFO L78 Accepts]: Start accepts. Automaton has 23390 states and 68381 transitions. Word has length 37 [2021-03-11 00:12:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:42,378 INFO L480 AbstractCegarLoop]: Abstraction has 23390 states and 68381 transitions. [2021-03-11 00:12:42,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 23390 states and 68381 transitions. [2021-03-11 00:12:42,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:42,412 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:42,412 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:42,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:42,613 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:42,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:42,613 INFO L82 PathProgramCache]: Analyzing trace with hash 158796890, now seen corresponding path program 86 times [2021-03-11 00:12:42,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:42,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98392613] [2021-03-11 00:12:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:42,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98392613] [2021-03-11 00:12:42,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782986979] [2021-03-11 00:12:42,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:42,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:12:42,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:42,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:42,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:42,762 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:42,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:42,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:12:42,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193944484] [2021-03-11 00:12:42,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:42,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:42,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:42,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:42,763 INFO L87 Difference]: Start difference. First operand 23390 states and 68381 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:43,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:43,213 INFO L93 Difference]: Finished difference Result 28781 states and 83207 transitions. [2021-03-11 00:12:43,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:12:43,214 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:43,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:43,270 INFO L225 Difference]: With dead ends: 28781 [2021-03-11 00:12:43,270 INFO L226 Difference]: Without dead ends: 28763 [2021-03-11 00:12:43,271 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:12:43,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28763 states. [2021-03-11 00:12:43,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28763 to 23896. [2021-03-11 00:12:43,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23896 states, 23895 states have (on average 2.924377484829462) internal successors, (69878), 23895 states have internal predecessors, (69878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23896 states to 23896 states and 69878 transitions. [2021-03-11 00:12:43,752 INFO L78 Accepts]: Start accepts. Automaton has 23896 states and 69878 transitions. Word has length 37 [2021-03-11 00:12:43,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:43,752 INFO L480 AbstractCegarLoop]: Abstraction has 23896 states and 69878 transitions. [2021-03-11 00:12:43,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:43,752 INFO L276 IsEmpty]: Start isEmpty. Operand 23896 states and 69878 transitions. [2021-03-11 00:12:43,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:43,787 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:43,787 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:43,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-03-11 00:12:43,988 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:43,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:43,988 INFO L82 PathProgramCache]: Analyzing trace with hash 887548708, now seen corresponding path program 87 times [2021-03-11 00:12:43,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:43,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532293473] [2021-03-11 00:12:43,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:43,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:44,024 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:44,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532293473] [2021-03-11 00:12:44,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546651692] [2021-03-11 00:12:44,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:12:44,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:12:44,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:44,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:44,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:44,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:44,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:12:44,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050664106] [2021-03-11 00:12:44,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:44,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:44,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:44,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:44,180 INFO L87 Difference]: Start difference. First operand 23896 states and 69878 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:44,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:44,815 INFO L93 Difference]: Finished difference Result 28064 states and 80410 transitions. [2021-03-11 00:12:44,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:12:44,816 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:44,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:44,868 INFO L225 Difference]: With dead ends: 28064 [2021-03-11 00:12:44,869 INFO L226 Difference]: Without dead ends: 28057 [2021-03-11 00:12:44,869 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 388.9ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:12:44,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28057 states. [2021-03-11 00:12:45,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28057 to 23076. [2021-03-11 00:12:45,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23076 states, 23075 states have (on average 2.9116359696641387) internal successors, (67186), 23075 states have internal predecessors, (67186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:45,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23076 states to 23076 states and 67186 transitions. [2021-03-11 00:12:45,408 INFO L78 Accepts]: Start accepts. Automaton has 23076 states and 67186 transitions. Word has length 37 [2021-03-11 00:12:45,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:45,408 INFO L480 AbstractCegarLoop]: Abstraction has 23076 states and 67186 transitions. [2021-03-11 00:12:45,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:45,408 INFO L276 IsEmpty]: Start isEmpty. Operand 23076 states and 67186 transitions. [2021-03-11 00:12:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:45,441 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:45,442 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:45,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-03-11 00:12:45,642 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:45,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:45,643 INFO L82 PathProgramCache]: Analyzing trace with hash 510577554, now seen corresponding path program 88 times [2021-03-11 00:12:45,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:45,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648422517] [2021-03-11 00:12:45,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:45,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648422517] [2021-03-11 00:12:45,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874907147] [2021-03-11 00:12:45,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:45,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:12:45,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:45,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:45,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:45,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:45,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:45,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-11 00:12:45,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314088654] [2021-03-11 00:12:45,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:45,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:45,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:45,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:45,781 INFO L87 Difference]: Start difference. First operand 23076 states and 67186 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:46,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:46,193 INFO L93 Difference]: Finished difference Result 25308 states and 72855 transitions. [2021-03-11 00:12:46,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:12:46,194 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:46,241 INFO L225 Difference]: With dead ends: 25308 [2021-03-11 00:12:46,241 INFO L226 Difference]: Without dead ends: 25294 [2021-03-11 00:12:46,241 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 209.7ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:12:46,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25294 states. [2021-03-11 00:12:46,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25294 to 20550. [2021-03-11 00:12:46,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20550 states, 20549 states have (on average 2.9120151832205945) internal successors, (59839), 20549 states have internal predecessors, (59839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:46,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20550 states to 20550 states and 59839 transitions. [2021-03-11 00:12:46,644 INFO L78 Accepts]: Start accepts. Automaton has 20550 states and 59839 transitions. Word has length 37 [2021-03-11 00:12:46,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:46,644 INFO L480 AbstractCegarLoop]: Abstraction has 20550 states and 59839 transitions. [2021-03-11 00:12:46,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:46,644 INFO L276 IsEmpty]: Start isEmpty. Operand 20550 states and 59839 transitions. [2021-03-11 00:12:46,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:46,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:46,674 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:46,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-03-11 00:12:46,875 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:46,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1704477878, now seen corresponding path program 89 times [2021-03-11 00:12:46,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:46,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483397355] [2021-03-11 00:12:46,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:46,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483397355] [2021-03-11 00:12:46,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641755289] [2021-03-11 00:12:46,914 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:46,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:12:46,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:46,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:46,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:47,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:47,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-11 00:12:47,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525021957] [2021-03-11 00:12:47,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:12:47,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:47,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:12:47,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:12:47,072 INFO L87 Difference]: Start difference. First operand 20550 states and 59839 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:47,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:47,511 INFO L93 Difference]: Finished difference Result 24191 states and 69468 transitions. [2021-03-11 00:12:47,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:12:47,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:47,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:47,553 INFO L225 Difference]: With dead ends: 24191 [2021-03-11 00:12:47,553 INFO L226 Difference]: Without dead ends: 24179 [2021-03-11 00:12:47,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 252.8ms TimeCoverageRelationStatistics Valid=340, Invalid=782, Unknown=0, NotChecked=0, Total=1122 [2021-03-11 00:12:47,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24179 states. [2021-03-11 00:12:47,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24179 to 20840. [2021-03-11 00:12:47,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20840 states, 20839 states have (on average 2.912135899035462) internal successors, (60686), 20839 states have internal predecessors, (60686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:48,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20840 states to 20840 states and 60686 transitions. [2021-03-11 00:12:48,036 INFO L78 Accepts]: Start accepts. Automaton has 20840 states and 60686 transitions. Word has length 37 [2021-03-11 00:12:48,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:48,036 INFO L480 AbstractCegarLoop]: Abstraction has 20840 states and 60686 transitions. [2021-03-11 00:12:48,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:48,036 INFO L276 IsEmpty]: Start isEmpty. Operand 20840 states and 60686 transitions. [2021-03-11 00:12:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:48,064 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:48,064 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:48,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-03-11 00:12:48,265 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:48,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:48,265 INFO L82 PathProgramCache]: Analyzing trace with hash 606853100, now seen corresponding path program 90 times [2021-03-11 00:12:48,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:48,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703642229] [2021-03-11 00:12:48,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:48,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703642229] [2021-03-11 00:12:48,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991179170] [2021-03-11 00:12:48,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:48,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:12:48,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:48,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:48,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:48,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:48,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-11 00:12:48,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626415524] [2021-03-11 00:12:48,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:48,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:48,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:48,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:48,413 INFO L87 Difference]: Start difference. First operand 20840 states and 60686 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:48,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:48,951 INFO L93 Difference]: Finished difference Result 25908 states and 74324 transitions. [2021-03-11 00:12:48,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:12:48,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:48,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:48,999 INFO L225 Difference]: With dead ends: 25908 [2021-03-11 00:12:48,999 INFO L226 Difference]: Without dead ends: 25902 [2021-03-11 00:12:49,000 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 269.8ms TimeCoverageRelationStatistics Valid=390, Invalid=800, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:12:49,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25902 states. [2021-03-11 00:12:49,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25902 to 20918. [2021-03-11 00:12:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20918 states, 20917 states have (on average 2.91193765836401) internal successors, (60909), 20917 states have internal predecessors, (60909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:49,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20918 states to 20918 states and 60909 transitions. [2021-03-11 00:12:49,460 INFO L78 Accepts]: Start accepts. Automaton has 20918 states and 60909 transitions. Word has length 37 [2021-03-11 00:12:49,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:49,460 INFO L480 AbstractCegarLoop]: Abstraction has 20918 states and 60909 transitions. [2021-03-11 00:12:49,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:49,460 INFO L276 IsEmpty]: Start isEmpty. Operand 20918 states and 60909 transitions. [2021-03-11 00:12:49,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:49,488 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:49,488 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:49,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:49,688 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:49,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1506148470, now seen corresponding path program 91 times [2021-03-11 00:12:49,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:49,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893192654] [2021-03-11 00:12:49,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:49,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:49,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:49,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893192654] [2021-03-11 00:12:49,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927908407] [2021-03-11 00:12:49,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:49,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:49,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:49,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:49,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:49,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-11 00:12:49,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025974861] [2021-03-11 00:12:49,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:49,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:49,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:49,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:49,839 INFO L87 Difference]: Start difference. First operand 20918 states and 60909 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:50,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:50,346 INFO L93 Difference]: Finished difference Result 27296 states and 78240 transitions. [2021-03-11 00:12:50,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:12:50,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:50,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:50,398 INFO L225 Difference]: With dead ends: 27296 [2021-03-11 00:12:50,398 INFO L226 Difference]: Without dead ends: 27296 [2021-03-11 00:12:50,399 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 321.5ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-03-11 00:12:50,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27296 states. [2021-03-11 00:12:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27296 to 22550. [2021-03-11 00:12:50,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22550 states, 22549 states have (on average 2.9157390571643975) internal successors, (65747), 22549 states have internal predecessors, (65747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22550 states to 22550 states and 65747 transitions. [2021-03-11 00:12:50,822 INFO L78 Accepts]: Start accepts. Automaton has 22550 states and 65747 transitions. Word has length 37 [2021-03-11 00:12:50,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:50,822 INFO L480 AbstractCegarLoop]: Abstraction has 22550 states and 65747 transitions. [2021-03-11 00:12:50,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand 22550 states and 65747 transitions. [2021-03-11 00:12:50,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:50,855 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:50,855 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:51,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:51,055 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:51,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:51,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1647232088, now seen corresponding path program 92 times [2021-03-11 00:12:51,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:51,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557347373] [2021-03-11 00:12:51,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:12:51,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557347373] [2021-03-11 00:12:51,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133342058] [2021-03-11 00:12:51,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:51,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:12:51,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:51,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:51,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:51,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:51,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:51,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-03-11 00:12:51,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385487515] [2021-03-11 00:12:51,193 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:51,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:51,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:51,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:51,193 INFO L87 Difference]: Start difference. First operand 22550 states and 65747 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:51,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:51,687 INFO L93 Difference]: Finished difference Result 26619 states and 76420 transitions. [2021-03-11 00:12:51,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:12:51,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:51,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:51,738 INFO L225 Difference]: With dead ends: 26619 [2021-03-11 00:12:51,739 INFO L226 Difference]: Without dead ends: 26598 [2021-03-11 00:12:51,739 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 280.2ms TimeCoverageRelationStatistics Valid=430, Invalid=830, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:12:51,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26598 states. [2021-03-11 00:12:52,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26598 to 20132. [2021-03-11 00:12:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20132 states, 20131 states have (on average 2.9061646217276835) internal successors, (58504), 20131 states have internal predecessors, (58504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:52,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20132 states to 20132 states and 58504 transitions. [2021-03-11 00:12:52,232 INFO L78 Accepts]: Start accepts. Automaton has 20132 states and 58504 transitions. Word has length 37 [2021-03-11 00:12:52,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:52,232 INFO L480 AbstractCegarLoop]: Abstraction has 20132 states and 58504 transitions. [2021-03-11 00:12:52,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:52,232 INFO L276 IsEmpty]: Start isEmpty. Operand 20132 states and 58504 transitions. [2021-03-11 00:12:52,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:52,261 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:52,261 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:52,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-03-11 00:12:52,462 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:52,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:52,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1731630862, now seen corresponding path program 93 times [2021-03-11 00:12:52,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:52,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235819686] [2021-03-11 00:12:52,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:52,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:52,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235819686] [2021-03-11 00:12:52,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690593207] [2021-03-11 00:12:52,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:52,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-11 00:12:52,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:52,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:52,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:52,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:52,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-11 00:12:52,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908253139] [2021-03-11 00:12:52,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:12:52,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:52,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:12:52,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:12:52,606 INFO L87 Difference]: Start difference. First operand 20132 states and 58504 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:52,998 INFO L93 Difference]: Finished difference Result 25298 states and 72495 transitions. [2021-03-11 00:12:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:12:52,999 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:53,046 INFO L225 Difference]: With dead ends: 25298 [2021-03-11 00:12:53,046 INFO L226 Difference]: Without dead ends: 25242 [2021-03-11 00:12:53,047 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:12:53,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25242 states. [2021-03-11 00:12:53,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25242 to 20732. [2021-03-11 00:12:53,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20732 states, 20731 states have (on average 2.910809898220057) internal successors, (60344), 20731 states have internal predecessors, (60344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20732 states to 20732 states and 60344 transitions. [2021-03-11 00:12:53,432 INFO L78 Accepts]: Start accepts. Automaton has 20732 states and 60344 transitions. Word has length 37 [2021-03-11 00:12:53,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:53,432 INFO L480 AbstractCegarLoop]: Abstraction has 20732 states and 60344 transitions. [2021-03-11 00:12:53,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:53,432 INFO L276 IsEmpty]: Start isEmpty. Operand 20732 states and 60344 transitions. [2021-03-11 00:12:53,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:53,462 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:53,462 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:53,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:53,662 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:53,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:53,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1163931468, now seen corresponding path program 94 times [2021-03-11 00:12:53,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:53,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841534518] [2021-03-11 00:12:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:53,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841534518] [2021-03-11 00:12:53,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547045707] [2021-03-11 00:12:53,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:53,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:12:53,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:53,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:53,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:53,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:53,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-11 00:12:53,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145558937] [2021-03-11 00:12:53,822 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:12:53,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:53,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:12:53,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:12:53,822 INFO L87 Difference]: Start difference. First operand 20732 states and 60344 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:54,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:54,256 INFO L93 Difference]: Finished difference Result 25729 states and 73778 transitions. [2021-03-11 00:12:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:12:54,257 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:54,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:54,305 INFO L225 Difference]: With dead ends: 25729 [2021-03-11 00:12:54,305 INFO L226 Difference]: Without dead ends: 25717 [2021-03-11 00:12:54,305 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 271.0ms TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:12:54,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25717 states. [2021-03-11 00:12:54,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25717 to 21912. [2021-03-11 00:12:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21912 states, 21911 states have (on average 2.9035644196978687) internal successors, (63620), 21911 states have internal predecessors, (63620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:54,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21912 states to 21912 states and 63620 transitions. [2021-03-11 00:12:54,706 INFO L78 Accepts]: Start accepts. Automaton has 21912 states and 63620 transitions. Word has length 37 [2021-03-11 00:12:54,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:54,706 INFO L480 AbstractCegarLoop]: Abstraction has 21912 states and 63620 transitions. [2021-03-11 00:12:54,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:54,706 INFO L276 IsEmpty]: Start isEmpty. Operand 21912 states and 63620 transitions. [2021-03-11 00:12:54,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:54,737 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:54,737 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:54,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:54,938 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:54,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:54,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1502315474, now seen corresponding path program 95 times [2021-03-11 00:12:54,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:54,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072059895] [2021-03-11 00:12:54,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:54,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072059895] [2021-03-11 00:12:54,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313483700] [2021-03-11 00:12:54,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:55,029 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:12:55,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:55,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:55,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:55,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:55,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-11 00:12:55,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516279259] [2021-03-11 00:12:55,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:12:55,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:55,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:12:55,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:12:55,142 INFO L87 Difference]: Start difference. First operand 21912 states and 63620 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:55,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:55,706 INFO L93 Difference]: Finished difference Result 30602 states and 87580 transitions. [2021-03-11 00:12:55,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-11 00:12:55,707 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:55,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:55,762 INFO L225 Difference]: With dead ends: 30602 [2021-03-11 00:12:55,763 INFO L226 Difference]: Without dead ends: 30596 [2021-03-11 00:12:55,763 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 342.0ms TimeCoverageRelationStatistics Valid=467, Invalid=1015, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:12:55,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30596 states. [2021-03-11 00:12:56,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30596 to 25152. [2021-03-11 00:12:56,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25152 states, 25151 states have (on average 2.9081945051886606) internal successors, (73144), 25151 states have internal predecessors, (73144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:56,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25152 states to 25152 states and 73144 transitions. [2021-03-11 00:12:56,340 INFO L78 Accepts]: Start accepts. Automaton has 25152 states and 73144 transitions. Word has length 37 [2021-03-11 00:12:56,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:56,340 INFO L480 AbstractCegarLoop]: Abstraction has 25152 states and 73144 transitions. [2021-03-11 00:12:56,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:56,341 INFO L276 IsEmpty]: Start isEmpty. Operand 25152 states and 73144 transitions. [2021-03-11 00:12:56,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:56,375 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:56,375 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:56,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable142 [2021-03-11 00:12:56,576 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:56,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:56,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1313090188, now seen corresponding path program 96 times [2021-03-11 00:12:56,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:56,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361134024] [2021-03-11 00:12:56,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:56,601 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:56,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361134024] [2021-03-11 00:12:56,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917679632] [2021-03-11 00:12:56,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:56,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:12:56,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:56,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:56,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:56,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:56,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-03-11 00:12:56,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008442419] [2021-03-11 00:12:56,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:56,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:56,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:56,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:56,715 INFO L87 Difference]: Start difference. First operand 25152 states and 73144 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:57,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:57,252 INFO L93 Difference]: Finished difference Result 35455 states and 101725 transitions. [2021-03-11 00:12:57,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-11 00:12:57,253 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:57,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:57,319 INFO L225 Difference]: With dead ends: 35455 [2021-03-11 00:12:57,319 INFO L226 Difference]: Without dead ends: 35455 [2021-03-11 00:12:57,320 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 308.7ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-03-11 00:12:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35455 states. [2021-03-11 00:12:57,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35455 to 30340. [2021-03-11 00:12:57,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30340 states, 30339 states have (on average 2.9054352483601966) internal successors, (88148), 30339 states have internal predecessors, (88148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:57,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30340 states to 30340 states and 88148 transitions. [2021-03-11 00:12:57,919 INFO L78 Accepts]: Start accepts. Automaton has 30340 states and 88148 transitions. Word has length 37 [2021-03-11 00:12:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:57,919 INFO L480 AbstractCegarLoop]: Abstraction has 30340 states and 88148 transitions. [2021-03-11 00:12:57,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 30340 states and 88148 transitions. [2021-03-11 00:12:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:57,964 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:57,964 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:58,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:58,166 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:58,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:58,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1172006570, now seen corresponding path program 97 times [2021-03-11 00:12:58,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:58,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143693582] [2021-03-11 00:12:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:58,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:58,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:12:58,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143693582] [2021-03-11 00:12:58,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279895693] [2021-03-11 00:12:58,196 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:58,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:58,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:12:58,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:12:58,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:12:58,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-03-11 00:12:58,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501376407] [2021-03-11 00:12:58,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-11 00:12:58,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:12:58,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-11 00:12:58,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-11 00:12:58,311 INFO L87 Difference]: Start difference. First operand 30340 states and 88148 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:58,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:12:58,780 INFO L93 Difference]: Finished difference Result 34916 states and 100293 transitions. [2021-03-11 00:12:58,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:12:58,781 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:12:58,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:12:58,835 INFO L225 Difference]: With dead ends: 34916 [2021-03-11 00:12:58,836 INFO L226 Difference]: Without dead ends: 34902 [2021-03-11 00:12:58,836 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=466, Invalid=940, Unknown=0, NotChecked=0, Total=1406 [2021-03-11 00:12:58,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34902 states. [2021-03-11 00:12:59,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34902 to 29980. [2021-03-11 00:12:59,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29980 states, 29979 states have (on average 2.901297574969145) internal successors, (86978), 29979 states have internal predecessors, (86978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:59,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29980 states to 29980 states and 86978 transitions. [2021-03-11 00:12:59,603 INFO L78 Accepts]: Start accepts. Automaton has 29980 states and 86978 transitions. Word has length 37 [2021-03-11 00:12:59,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:12:59,603 INFO L480 AbstractCegarLoop]: Abstraction has 29980 states and 86978 transitions. [2021-03-11 00:12:59,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:12:59,603 INFO L276 IsEmpty]: Start isEmpty. Operand 29980 states and 86978 transitions. [2021-03-11 00:12:59,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:12:59,650 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:12:59,650 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:12:59,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-03-11 00:12:59,852 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:12:59,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:12:59,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1087607796, now seen corresponding path program 98 times [2021-03-11 00:12:59,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:12:59,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602595056] [2021-03-11 00:12:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:12:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:12:59,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:12:59,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602595056] [2021-03-11 00:12:59,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601048450] [2021-03-11 00:12:59,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:12:59,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:12:59,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:12:59,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:12:59,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:00,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:00,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-03-11 00:13:00,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138996050] [2021-03-11 00:13:00,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-11 00:13:00,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:00,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-11 00:13:00,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-03-11 00:13:00,011 INFO L87 Difference]: Start difference. First operand 29980 states and 86978 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:00,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:00,488 INFO L93 Difference]: Finished difference Result 35525 states and 101994 transitions. [2021-03-11 00:13:00,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:13:00,489 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:13:00,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:00,567 INFO L225 Difference]: With dead ends: 35525 [2021-03-11 00:13:00,568 INFO L226 Difference]: Without dead ends: 35469 [2021-03-11 00:13:00,568 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 268.5ms TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:13:00,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35469 states. [2021-03-11 00:13:01,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35469 to 30928. [2021-03-11 00:13:01,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30928 states, 30927 states have (on average 2.9010896627542277) internal successors, (89722), 30927 states have internal predecessors, (89722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:01,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30928 states to 30928 states and 89722 transitions. [2021-03-11 00:13:01,450 INFO L78 Accepts]: Start accepts. Automaton has 30928 states and 89722 transitions. Word has length 37 [2021-03-11 00:13:01,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:01,450 INFO L480 AbstractCegarLoop]: Abstraction has 30928 states and 89722 transitions. [2021-03-11 00:13:01,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:01,450 INFO L276 IsEmpty]: Start isEmpty. Operand 30928 states and 89722 transitions. [2021-03-11 00:13:01,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-03-11 00:13:01,499 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:01,499 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:01,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-03-11 00:13:01,700 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:01,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:01,700 INFO L82 PathProgramCache]: Analyzing trace with hash 552429714, now seen corresponding path program 99 times [2021-03-11 00:13:01,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:01,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886725667] [2021-03-11 00:13:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:01,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:01,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886725667] [2021-03-11 00:13:01,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931556152] [2021-03-11 00:13:01,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:02,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:13:02,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:02,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-11 00:13:02,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:02,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:02,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-03-11 00:13:02,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98653893] [2021-03-11 00:13:02,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:13:02,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:02,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:13:02,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:13:02,125 INFO L87 Difference]: Start difference. First operand 30928 states and 89722 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:02,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:02,616 INFO L93 Difference]: Finished difference Result 36591 states and 105181 transitions. [2021-03-11 00:13:02,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:13:02,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-03-11 00:13:02,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:02,689 INFO L225 Difference]: With dead ends: 36591 [2021-03-11 00:13:02,689 INFO L226 Difference]: Without dead ends: 36493 [2021-03-11 00:13:02,689 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:13:02,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36493 states. [2021-03-11 00:13:03,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36493 to 32222. [2021-03-11 00:13:03,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32222 states, 32221 states have (on average 2.900561745445517) internal successors, (93459), 32221 states have internal predecessors, (93459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:03,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32222 states to 32222 states and 93459 transitions. [2021-03-11 00:13:03,452 INFO L78 Accepts]: Start accepts. Automaton has 32222 states and 93459 transitions. Word has length 37 [2021-03-11 00:13:03,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:03,452 INFO L480 AbstractCegarLoop]: Abstraction has 32222 states and 93459 transitions. [2021-03-11 00:13:03,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:03,453 INFO L276 IsEmpty]: Start isEmpty. Operand 32222 states and 93459 transitions. [2021-03-11 00:13:03,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:03,512 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:03,512 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:03,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-03-11 00:13:03,715 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:03,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:03,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1312568382, now seen corresponding path program 100 times [2021-03-11 00:13:03,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:03,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968603567] [2021-03-11 00:13:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:03,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:03,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968603567] [2021-03-11 00:13:03,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44236816] [2021-03-11 00:13:03,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:03,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:13:03,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:03,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:13:03,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:04,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:04,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-03-11 00:13:04,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846225055] [2021-03-11 00:13:04,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:13:04,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:04,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:13:04,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:13:04,145 INFO L87 Difference]: Start difference. First operand 32222 states and 93459 transitions. Second operand has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:04,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:04,611 INFO L93 Difference]: Finished difference Result 45612 states and 132049 transitions. [2021-03-11 00:13:04,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:13:04,612 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:04,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:04,700 INFO L225 Difference]: With dead ends: 45612 [2021-03-11 00:13:04,701 INFO L226 Difference]: Without dead ends: 45574 [2021-03-11 00:13:04,701 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:13:04,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45574 states. [2021-03-11 00:13:05,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45574 to 32250. [2021-03-11 00:13:05,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32250 states, 32249 states have (on average 2.8999038729883098) internal successors, (93519), 32249 states have internal predecessors, (93519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:05,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32250 states to 32250 states and 93519 transitions. [2021-03-11 00:13:05,545 INFO L78 Accepts]: Start accepts. Automaton has 32250 states and 93519 transitions. Word has length 40 [2021-03-11 00:13:05,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:05,545 INFO L480 AbstractCegarLoop]: Abstraction has 32250 states and 93519 transitions. [2021-03-11 00:13:05,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:05,545 INFO L276 IsEmpty]: Start isEmpty. Operand 32250 states and 93519 transitions. [2021-03-11 00:13:05,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:05,754 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:05,754 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:05,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-03-11 00:13:05,975 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:05,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:05,976 INFO L82 PathProgramCache]: Analyzing trace with hash 920480774, now seen corresponding path program 101 times [2021-03-11 00:13:05,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:05,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129132541] [2021-03-11 00:13:05,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:05,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:06,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:06,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129132541] [2021-03-11 00:13:06,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084367686] [2021-03-11 00:13:06,108 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:06,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:13:06,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:06,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:13:06,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:06,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:06,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-11 00:13:06,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862458081] [2021-03-11 00:13:06,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:13:06,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:06,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:13:06,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:13:06,326 INFO L87 Difference]: Start difference. First operand 32250 states and 93519 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:07,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:07,017 INFO L93 Difference]: Finished difference Result 53299 states and 154498 transitions. [2021-03-11 00:13:07,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:13:07,018 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:07,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:07,133 INFO L225 Difference]: With dead ends: 53299 [2021-03-11 00:13:07,133 INFO L226 Difference]: Without dead ends: 53217 [2021-03-11 00:13:07,133 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 328.2ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:13:07,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53217 states. [2021-03-11 00:13:08,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53217 to 38743. [2021-03-11 00:13:08,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38743 states, 38742 states have (on average 2.906535542821744) internal successors, (112605), 38742 states have internal predecessors, (112605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:08,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38743 states to 38743 states and 112605 transitions. [2021-03-11 00:13:08,183 INFO L78 Accepts]: Start accepts. Automaton has 38743 states and 112605 transitions. Word has length 40 [2021-03-11 00:13:08,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:08,184 INFO L480 AbstractCegarLoop]: Abstraction has 38743 states and 112605 transitions. [2021-03-11 00:13:08,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:08,184 INFO L276 IsEmpty]: Start isEmpty. Operand 38743 states and 112605 transitions. [2021-03-11 00:13:08,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:08,241 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:08,241 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:08,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-03-11 00:13:08,443 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:08,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:08,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1516586690, now seen corresponding path program 102 times [2021-03-11 00:13:08,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:08,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697895353] [2021-03-11 00:13:08,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:08,574 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:08,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697895353] [2021-03-11 00:13:08,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430867247] [2021-03-11 00:13:08,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:08,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:13:08,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:08,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:13:08,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:08,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:08,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-11 00:13:08,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817499707] [2021-03-11 00:13:08,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:13:08,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:08,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:13:08,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:13:08,787 INFO L87 Difference]: Start difference. First operand 38743 states and 112605 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:09,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:09,568 INFO L93 Difference]: Finished difference Result 53283 states and 154460 transitions. [2021-03-11 00:13:09,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:13:09,569 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:09,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:09,690 INFO L225 Difference]: With dead ends: 53283 [2021-03-11 00:13:09,691 INFO L226 Difference]: Without dead ends: 53171 [2021-03-11 00:13:09,691 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:13:09,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53171 states. [2021-03-11 00:13:10,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53171 to 37569. [2021-03-11 00:13:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37569 states, 37568 states have (on average 2.902044293015332) internal successors, (109024), 37568 states have internal predecessors, (109024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:10,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37569 states to 37569 states and 109024 transitions. [2021-03-11 00:13:10,775 INFO L78 Accepts]: Start accepts. Automaton has 37569 states and 109024 transitions. Word has length 40 [2021-03-11 00:13:10,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:10,775 INFO L480 AbstractCegarLoop]: Abstraction has 37569 states and 109024 transitions. [2021-03-11 00:13:10,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:10,776 INFO L276 IsEmpty]: Start isEmpty. Operand 37569 states and 109024 transitions. [2021-03-11 00:13:10,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:10,830 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:10,830 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:11,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:11,031 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:11,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:11,031 INFO L82 PathProgramCache]: Analyzing trace with hash 459063162, now seen corresponding path program 103 times [2021-03-11 00:13:11,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:11,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724554500] [2021-03-11 00:13:11,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:11,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724554500] [2021-03-11 00:13:11,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280415972] [2021-03-11 00:13:11,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:11,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:13:11,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:11,393 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:11,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:11,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-11 00:13:11,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744666390] [2021-03-11 00:13:11,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:13:11,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:11,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:13:11,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:13:11,394 INFO L87 Difference]: Start difference. First operand 37569 states and 109024 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:11,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:11,936 INFO L93 Difference]: Finished difference Result 53095 states and 153814 transitions. [2021-03-11 00:13:11,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:13:11,937 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:11,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:12,058 INFO L225 Difference]: With dead ends: 53095 [2021-03-11 00:13:12,059 INFO L226 Difference]: Without dead ends: 52978 [2021-03-11 00:13:12,059 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 300.8ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:13:12,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52978 states. [2021-03-11 00:13:12,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52978 to 38199. [2021-03-11 00:13:12,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38199 states, 38198 states have (on average 2.9027959579035554) internal successors, (110881), 38198 states have internal predecessors, (110881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:13,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38199 states to 38199 states and 110881 transitions. [2021-03-11 00:13:13,350 INFO L78 Accepts]: Start accepts. Automaton has 38199 states and 110881 transitions. Word has length 40 [2021-03-11 00:13:13,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:13,350 INFO L480 AbstractCegarLoop]: Abstraction has 38199 states and 110881 transitions. [2021-03-11 00:13:13,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:13,351 INFO L276 IsEmpty]: Start isEmpty. Operand 38199 states and 110881 transitions. [2021-03-11 00:13:13,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:13,417 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:13,418 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:13,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:13,618 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:13,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:13,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1637637984, now seen corresponding path program 104 times [2021-03-11 00:13:13,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:13,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997808573] [2021-03-11 00:13:13,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:13,756 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:13,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997808573] [2021-03-11 00:13:13,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102119339] [2021-03-11 00:13:13,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:13,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:13:13,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:13,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:13:13,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:13,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:13,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-03-11 00:13:13,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298717851] [2021-03-11 00:13:13,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:13:13,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:13,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:13:13,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:13:13,978 INFO L87 Difference]: Start difference. First operand 38199 states and 110881 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2021-03-11 00:13:14,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:14,453 INFO L93 Difference]: Finished difference Result 53079 states and 153808 transitions. [2021-03-11 00:13:14,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:13:14,454 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:14,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:14,576 INFO L225 Difference]: With dead ends: 53079 [2021-03-11 00:13:14,576 INFO L226 Difference]: Without dead ends: 53003 [2021-03-11 00:13:14,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 280.3ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:13:14,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53003 states. [2021-03-11 00:13:15,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53003 to 38855. [2021-03-11 00:13:15,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38855 states, 38854 states have (on average 2.9040768003294386) internal successors, (112835), 38854 states have internal predecessors, (112835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38855 states to 38855 states and 112835 transitions. [2021-03-11 00:13:15,786 INFO L78 Accepts]: Start accepts. Automaton has 38855 states and 112835 transitions. Word has length 40 [2021-03-11 00:13:15,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:15,786 INFO L480 AbstractCegarLoop]: Abstraction has 38855 states and 112835 transitions. [2021-03-11 00:13:15,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2021-03-11 00:13:15,786 INFO L276 IsEmpty]: Start isEmpty. Operand 38855 states and 112835 transitions. [2021-03-11 00:13:15,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:15,839 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:15,839 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:16,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:16,040 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:16,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:16,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1202515386, now seen corresponding path program 105 times [2021-03-11 00:13:16,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:16,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649784820] [2021-03-11 00:13:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:16,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:16,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649784820] [2021-03-11 00:13:16,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410229160] [2021-03-11 00:13:16,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:16,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:13:16,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:16,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:13:16,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:16,449 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:16,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:16,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-03-11 00:13:16,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534359664] [2021-03-11 00:13:16,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:13:16,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:16,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:13:16,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:13:16,450 INFO L87 Difference]: Start difference. First operand 38855 states and 112835 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2021-03-11 00:13:16,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:16,892 INFO L93 Difference]: Finished difference Result 52979 states and 153595 transitions. [2021-03-11 00:13:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:13:16,893 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:16,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:16,996 INFO L225 Difference]: With dead ends: 52979 [2021-03-11 00:13:16,996 INFO L226 Difference]: Without dead ends: 52941 [2021-03-11 00:13:16,996 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 296.9ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:13:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52941 states. [2021-03-11 00:13:17,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52941 to 38877. [2021-03-11 00:13:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38877 states, 38876 states have (on average 2.90410536063381) internal successors, (112900), 38876 states have internal predecessors, (112900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:17,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38877 states to 38877 states and 112900 transitions. [2021-03-11 00:13:17,997 INFO L78 Accepts]: Start accepts. Automaton has 38877 states and 112900 transitions. Word has length 40 [2021-03-11 00:13:17,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:17,997 INFO L480 AbstractCegarLoop]: Abstraction has 38877 states and 112900 transitions. [2021-03-11 00:13:17,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2021-03-11 00:13:17,997 INFO L276 IsEmpty]: Start isEmpty. Operand 38877 states and 112900 transitions. [2021-03-11 00:13:18,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:18,056 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:18,056 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:18,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-03-11 00:13:18,257 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:18,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:18,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1556734402, now seen corresponding path program 106 times [2021-03-11 00:13:18,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:18,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418780906] [2021-03-11 00:13:18,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:18,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:18,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418780906] [2021-03-11 00:13:18,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016770129] [2021-03-11 00:13:18,421 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:13:18,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:13:18,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:18,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:13:18,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:18,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:18,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-03-11 00:13:18,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506245580] [2021-03-11 00:13:18,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:13:18,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:18,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:13:18,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:13:18,650 INFO L87 Difference]: Start difference. First operand 38877 states and 112900 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:19,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:19,477 INFO L93 Difference]: Finished difference Result 52587 states and 152586 transitions. [2021-03-11 00:13:19,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:13:19,478 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:19,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:19,597 INFO L225 Difference]: With dead ends: 52587 [2021-03-11 00:13:19,597 INFO L226 Difference]: Without dead ends: 52481 [2021-03-11 00:13:19,597 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 373.2ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:13:19,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52481 states. [2021-03-11 00:13:20,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52481 to 49293. [2021-03-11 00:13:20,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49293 states, 49292 states have (on average 2.9144688793313316) internal successors, (143660), 49292 states have internal predecessors, (143660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:20,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49293 states to 49293 states and 143660 transitions. [2021-03-11 00:13:20,671 INFO L78 Accepts]: Start accepts. Automaton has 49293 states and 143660 transitions. Word has length 40 [2021-03-11 00:13:20,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:20,671 INFO L480 AbstractCegarLoop]: Abstraction has 49293 states and 143660 transitions. [2021-03-11 00:13:20,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:20,671 INFO L276 IsEmpty]: Start isEmpty. Operand 49293 states and 143660 transitions. [2021-03-11 00:13:20,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:20,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:20,745 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:20,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:20,945 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:20,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:20,945 INFO L82 PathProgramCache]: Analyzing trace with hash -280230338, now seen corresponding path program 107 times [2021-03-11 00:13:20,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:20,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995738589] [2021-03-11 00:13:20,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:21,062 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:21,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995738589] [2021-03-11 00:13:21,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532048696] [2021-03-11 00:13:21,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:21,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-11 00:13:21,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:21,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:13:21,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:21,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:21,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-03-11 00:13:21,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032493613] [2021-03-11 00:13:21,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:13:21,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:21,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:13:21,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:13:21,309 INFO L87 Difference]: Start difference. First operand 49293 states and 143660 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:22,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:22,188 INFO L93 Difference]: Finished difference Result 53602 states and 155503 transitions. [2021-03-11 00:13:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:13:22,189 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:22,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:22,308 INFO L225 Difference]: With dead ends: 53602 [2021-03-11 00:13:22,308 INFO L226 Difference]: Without dead ends: 53478 [2021-03-11 00:13:22,308 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 335.9ms TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:13:22,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53478 states. [2021-03-11 00:13:23,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53478 to 48047. [2021-03-11 00:13:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48047 states, 48046 states have (on average 2.9100237272613745) internal successors, (139815), 48046 states have internal predecessors, (139815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:23,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48047 states to 48047 states and 139815 transitions. [2021-03-11 00:13:23,457 INFO L78 Accepts]: Start accepts. Automaton has 48047 states and 139815 transitions. Word has length 40 [2021-03-11 00:13:23,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:23,457 INFO L480 AbstractCegarLoop]: Abstraction has 48047 states and 139815 transitions. [2021-03-11 00:13:23,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:23,457 INFO L276 IsEmpty]: Start isEmpty. Operand 48047 states and 139815 transitions. [2021-03-11 00:13:23,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:23,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:23,527 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:23,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-03-11 00:13:23,729 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:23,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1270374918, now seen corresponding path program 108 times [2021-03-11 00:13:23,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:23,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871415913] [2021-03-11 00:13:23,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:23,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871415913] [2021-03-11 00:13:23,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560517555] [2021-03-11 00:13:23,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:23,871 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:13:23,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:23,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:13:23,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:24,087 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:24,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:24,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-03-11 00:13:24,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972652577] [2021-03-11 00:13:24,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:13:24,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:24,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:13:24,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:13:24,089 INFO L87 Difference]: Start difference. First operand 48047 states and 139815 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:24,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:24,628 INFO L93 Difference]: Finished difference Result 51601 states and 149422 transitions. [2021-03-11 00:13:24,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:13:24,629 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:24,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:25,100 INFO L225 Difference]: With dead ends: 51601 [2021-03-11 00:13:25,100 INFO L226 Difference]: Without dead ends: 51477 [2021-03-11 00:13:25,101 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:13:25,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51477 states. [2021-03-11 00:13:25,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51477 to 47339. [2021-03-11 00:13:26,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47339 states, 47338 states have (on average 2.9092695086399933) internal successors, (137719), 47338 states have internal predecessors, (137719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:26,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47339 states to 47339 states and 137719 transitions. [2021-03-11 00:13:26,214 INFO L78 Accepts]: Start accepts. Automaton has 47339 states and 137719 transitions. Word has length 40 [2021-03-11 00:13:26,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:26,214 INFO L480 AbstractCegarLoop]: Abstraction has 47339 states and 137719 transitions. [2021-03-11 00:13:26,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 47339 states and 137719 transitions. [2021-03-11 00:13:26,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:26,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:26,286 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:26,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:26,486 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:26,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:26,487 INFO L82 PathProgramCache]: Analyzing trace with hash 626264254, now seen corresponding path program 109 times [2021-03-11 00:13:26,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:26,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623914168] [2021-03-11 00:13:26,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:26,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:26,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623914168] [2021-03-11 00:13:26,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293800074] [2021-03-11 00:13:26,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:26,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:13:26,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:26,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:26,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-03-11 00:13:26,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307664943] [2021-03-11 00:13:26,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:13:26,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:26,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:13:26,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:13:26,856 INFO L87 Difference]: Start difference. First operand 47339 states and 137719 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:27,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:27,358 INFO L93 Difference]: Finished difference Result 50426 states and 146069 transitions. [2021-03-11 00:13:27,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:13:27,359 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:27,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:27,470 INFO L225 Difference]: With dead ends: 50426 [2021-03-11 00:13:27,471 INFO L226 Difference]: Without dead ends: 50350 [2021-03-11 00:13:27,471 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 289.7ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:13:27,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50350 states. [2021-03-11 00:13:28,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50350 to 46743. [2021-03-11 00:13:28,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46743 states, 46742 states have (on average 2.908326558555475) internal successors, (135941), 46742 states have internal predecessors, (135941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:28,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46743 states to 46743 states and 135941 transitions. [2021-03-11 00:13:28,632 INFO L78 Accepts]: Start accepts. Automaton has 46743 states and 135941 transitions. Word has length 40 [2021-03-11 00:13:28,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:28,632 INFO L480 AbstractCegarLoop]: Abstraction has 46743 states and 135941 transitions. [2021-03-11 00:13:28,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:28,632 INFO L276 IsEmpty]: Start isEmpty. Operand 46743 states and 135941 transitions. [2021-03-11 00:13:28,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:28,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:28,698 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:28,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:28,899 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:28,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:28,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1839351558, now seen corresponding path program 110 times [2021-03-11 00:13:28,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:28,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719387076] [2021-03-11 00:13:28,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:29,057 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:29,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719387076] [2021-03-11 00:13:29,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107728949] [2021-03-11 00:13:29,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:29,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:13:29,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:29,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:13:29,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:29,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:29,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-03-11 00:13:29,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430918718] [2021-03-11 00:13:29,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:13:29,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:29,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:13:29,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:13:29,363 INFO L87 Difference]: Start difference. First operand 46743 states and 135941 transitions. Second operand has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:30,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:30,045 INFO L93 Difference]: Finished difference Result 50406 states and 146007 transitions. [2021-03-11 00:13:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:13:30,046 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:30,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:30,172 INFO L225 Difference]: With dead ends: 50406 [2021-03-11 00:13:30,173 INFO L226 Difference]: Without dead ends: 50330 [2021-03-11 00:13:30,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:13:30,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50330 states. [2021-03-11 00:13:31,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50330 to 47351. [2021-03-11 00:13:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47351 states, 47350 states have (on average 2.9088912354804646) internal successors, (137736), 47350 states have internal predecessors, (137736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:31,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47351 states to 47351 states and 137736 transitions. [2021-03-11 00:13:31,329 INFO L78 Accepts]: Start accepts. Automaton has 47351 states and 137736 transitions. Word has length 40 [2021-03-11 00:13:31,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:31,329 INFO L480 AbstractCegarLoop]: Abstraction has 47351 states and 137736 transitions. [2021-03-11 00:13:31,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.727272727272727) internal successors, (60), 21 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:31,329 INFO L276 IsEmpty]: Start isEmpty. Operand 47351 states and 137736 transitions. [2021-03-11 00:13:31,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:31,404 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:31,404 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:31,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:31,605 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:31,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:31,605 INFO L82 PathProgramCache]: Analyzing trace with hash 665879302, now seen corresponding path program 111 times [2021-03-11 00:13:31,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:31,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090529464] [2021-03-11 00:13:31,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:31,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090529464] [2021-03-11 00:13:31,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578924002] [2021-03-11 00:13:31,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:31,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-11 00:13:31,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:31,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:13:31,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:32,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:32,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-03-11 00:13:32,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194340686] [2021-03-11 00:13:32,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:13:32,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:32,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:13:32,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:13:32,035 INFO L87 Difference]: Start difference. First operand 47351 states and 137736 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:32,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:32,555 INFO L93 Difference]: Finished difference Result 57495 states and 167441 transitions. [2021-03-11 00:13:32,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:13:32,556 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:32,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:32,702 INFO L225 Difference]: With dead ends: 57495 [2021-03-11 00:13:32,703 INFO L226 Difference]: Without dead ends: 57373 [2021-03-11 00:13:32,703 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 356.5ms TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:13:32,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57373 states. [2021-03-11 00:13:33,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57373 to 56865. [2021-03-11 00:13:34,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56865 states, 56864 states have (on average 2.919017304445695) internal successors, (165987), 56864 states have internal predecessors, (165987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56865 states to 56865 states and 165987 transitions. [2021-03-11 00:13:34,464 INFO L78 Accepts]: Start accepts. Automaton has 56865 states and 165987 transitions. Word has length 40 [2021-03-11 00:13:34,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:34,464 INFO L480 AbstractCegarLoop]: Abstraction has 56865 states and 165987 transitions. [2021-03-11 00:13:34,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 56865 states and 165987 transitions. [2021-03-11 00:13:34,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:34,559 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:34,559 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:34,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-03-11 00:13:34,759 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:34,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:34,760 INFO L82 PathProgramCache]: Analyzing trace with hash -557051134, now seen corresponding path program 112 times [2021-03-11 00:13:34,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:34,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331608390] [2021-03-11 00:13:34,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:34,878 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:34,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331608390] [2021-03-11 00:13:34,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282112347] [2021-03-11 00:13:34,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:34,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:13:34,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:34,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:13:34,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:35,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:35,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2021-03-11 00:13:35,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295403069] [2021-03-11 00:13:35,150 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:13:35,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:35,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:13:35,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:13:35,151 INFO L87 Difference]: Start difference. First operand 56865 states and 165987 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:35,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:35,690 INFO L93 Difference]: Finished difference Result 58188 states and 169517 transitions. [2021-03-11 00:13:35,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:13:35,691 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:35,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:35,815 INFO L225 Difference]: With dead ends: 58188 [2021-03-11 00:13:35,815 INFO L226 Difference]: Without dead ends: 58058 [2021-03-11 00:13:35,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:13:35,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58058 states. [2021-03-11 00:13:36,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58058 to 52365. [2021-03-11 00:13:37,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52365 states, 52364 states have (on average 2.9161446795508366) internal successors, (152701), 52364 states have internal predecessors, (152701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52365 states to 52365 states and 152701 transitions. [2021-03-11 00:13:37,166 INFO L78 Accepts]: Start accepts. Automaton has 52365 states and 152701 transitions. Word has length 40 [2021-03-11 00:13:37,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:37,166 INFO L480 AbstractCegarLoop]: Abstraction has 52365 states and 152701 transitions. [2021-03-11 00:13:37,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:37,166 INFO L276 IsEmpty]: Start isEmpty. Operand 52365 states and 152701 transitions. [2021-03-11 00:13:37,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:37,257 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:37,257 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:37,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:37,458 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:37,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:37,458 INFO L82 PathProgramCache]: Analyzing trace with hash -161255976, now seen corresponding path program 113 times [2021-03-11 00:13:37,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:37,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177662033] [2021-03-11 00:13:37,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:37,567 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:37,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177662033] [2021-03-11 00:13:37,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098626927] [2021-03-11 00:13:37,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:37,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-11 00:13:37,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:37,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:13:37,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:38,122 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:38,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:38,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2021-03-11 00:13:38,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278119721] [2021-03-11 00:13:38,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:13:38,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:38,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:13:38,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:13:38,123 INFO L87 Difference]: Start difference. First operand 52365 states and 152701 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:38,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:38,564 INFO L93 Difference]: Finished difference Result 53207 states and 154734 transitions. [2021-03-11 00:13:38,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:13:38,564 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:38,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:38,681 INFO L225 Difference]: With dead ends: 53207 [2021-03-11 00:13:38,681 INFO L226 Difference]: Without dead ends: 53090 [2021-03-11 00:13:38,682 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 580.7ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:13:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53090 states. [2021-03-11 00:13:39,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53090 to 50967. [2021-03-11 00:13:39,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50967 states, 50966 states have (on average 2.9151983675391437) internal successors, (148576), 50966 states have internal predecessors, (148576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:39,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50967 states to 50967 states and 148576 transitions. [2021-03-11 00:13:39,844 INFO L78 Accepts]: Start accepts. Automaton has 50967 states and 148576 transitions. Word has length 40 [2021-03-11 00:13:39,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:39,844 INFO L480 AbstractCegarLoop]: Abstraction has 50967 states and 148576 transitions. [2021-03-11 00:13:39,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:39,844 INFO L276 IsEmpty]: Start isEmpty. Operand 50967 states and 148576 transitions. [2021-03-11 00:13:39,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:39,922 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:39,922 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:40,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:40,123 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:40,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:40,123 INFO L82 PathProgramCache]: Analyzing trace with hash 2036427680, now seen corresponding path program 114 times [2021-03-11 00:13:40,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:40,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126326496] [2021-03-11 00:13:40,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:40,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126326496] [2021-03-11 00:13:40,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562881897] [2021-03-11 00:13:40,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:40,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:13:40,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:40,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:13:40,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:40,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:40,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 21 [2021-03-11 00:13:40,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551822260] [2021-03-11 00:13:40,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:13:40,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:40,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:13:40,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:13:40,517 INFO L87 Difference]: Start difference. First operand 50967 states and 148576 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:41,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:41,014 INFO L93 Difference]: Finished difference Result 53177 states and 154815 transitions. [2021-03-11 00:13:41,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:13:41,014 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:41,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:41,137 INFO L225 Difference]: With dead ends: 53177 [2021-03-11 00:13:41,137 INFO L226 Difference]: Without dead ends: 53101 [2021-03-11 00:13:41,138 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 307.7ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:13:41,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53101 states. [2021-03-11 00:13:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53101 to 50373. [2021-03-11 00:13:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50373 states, 50372 states have (on average 2.9174342888906537) internal successors, (146957), 50372 states have internal predecessors, (146957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:42,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50373 states to 50373 states and 146957 transitions. [2021-03-11 00:13:42,496 INFO L78 Accepts]: Start accepts. Automaton has 50373 states and 146957 transitions. Word has length 40 [2021-03-11 00:13:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:42,496 INFO L480 AbstractCegarLoop]: Abstraction has 50373 states and 146957 transitions. [2021-03-11 00:13:42,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:42,496 INFO L276 IsEmpty]: Start isEmpty. Operand 50373 states and 146957 transitions. [2021-03-11 00:13:42,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:42,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:42,570 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:42,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-03-11 00:13:42,770 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:42,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:42,771 INFO L82 PathProgramCache]: Analyzing trace with hash -711983976, now seen corresponding path program 115 times [2021-03-11 00:13:42,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:42,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765090090] [2021-03-11 00:13:42,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:43,253 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 10 [2021-03-11 00:13:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:13:43,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765090090] [2021-03-11 00:13:43,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365923185] [2021-03-11 00:13:43,281 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:43,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:43,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:13:43,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:43,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:43,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 21 [2021-03-11 00:13:43,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718583754] [2021-03-11 00:13:43,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:13:43,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:43,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:13:43,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:13:43,569 INFO L87 Difference]: Start difference. First operand 50373 states and 146957 transitions. Second operand has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 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) [2021-03-11 00:13:44,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:44,084 INFO L93 Difference]: Finished difference Result 51649 states and 150512 transitions. [2021-03-11 00:13:44,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:13:44,085 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:44,202 INFO L225 Difference]: With dead ends: 51649 [2021-03-11 00:13:44,203 INFO L226 Difference]: Without dead ends: 51573 [2021-03-11 00:13:44,203 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 686.5ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:13:44,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51573 states. [2021-03-11 00:13:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51573 to 51249. [2021-03-11 00:13:45,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51249 states, 51248 states have (on average 2.919313924445832) internal successors, (149609), 51248 states have internal predecessors, (149609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:45,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51249 states to 51249 states and 149609 transitions. [2021-03-11 00:13:45,331 INFO L78 Accepts]: Start accepts. Automaton has 51249 states and 149609 transitions. Word has length 40 [2021-03-11 00:13:45,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:45,331 INFO L480 AbstractCegarLoop]: Abstraction has 51249 states and 149609 transitions. [2021-03-11 00:13:45,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8181818181818183) internal successors, (62), 21 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) [2021-03-11 00:13:45,331 INFO L276 IsEmpty]: Start isEmpty. Operand 51249 states and 149609 transitions. [2021-03-11 00:13:45,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:45,407 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:45,407 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:45,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-03-11 00:13:45,608 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:45,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:45,608 INFO L82 PathProgramCache]: Analyzing trace with hash 748763352, now seen corresponding path program 116 times [2021-03-11 00:13:45,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:45,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115793993] [2021-03-11 00:13:45,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:45,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:45,799 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:45,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115793993] [2021-03-11 00:13:45,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359857874] [2021-03-11 00:13:45,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:45,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:13:45,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:45,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:13:45,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:46,072 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:46,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:46,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-03-11 00:13:46,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117585629] [2021-03-11 00:13:46,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:13:46,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:46,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:13:46,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:13:46,073 INFO L87 Difference]: Start difference. First operand 51249 states and 149609 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:46,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:46,593 INFO L93 Difference]: Finished difference Result 51693 states and 150595 transitions. [2021-03-11 00:13:46,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:13:46,594 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:46,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:46,706 INFO L225 Difference]: With dead ends: 51693 [2021-03-11 00:13:46,707 INFO L226 Difference]: Without dead ends: 51617 [2021-03-11 00:13:46,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 366.0ms TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:13:46,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51617 states. [2021-03-11 00:13:47,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51617 to 51243. [2021-03-11 00:13:47,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51243 states, 51242 states have (on average 2.9193630225205887) internal successors, (149594), 51242 states have internal predecessors, (149594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:47,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51243 states to 51243 states and 149594 transitions. [2021-03-11 00:13:47,955 INFO L78 Accepts]: Start accepts. Automaton has 51243 states and 149594 transitions. Word has length 40 [2021-03-11 00:13:47,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:47,955 INFO L480 AbstractCegarLoop]: Abstraction has 51243 states and 149594 transitions. [2021-03-11 00:13:47,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 22 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:47,955 INFO L276 IsEmpty]: Start isEmpty. Operand 51243 states and 149594 transitions. [2021-03-11 00:13:48,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:48,340 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:48,340 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:48,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-03-11 00:13:48,562 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:48,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:48,563 INFO L82 PathProgramCache]: Analyzing trace with hash -960067266, now seen corresponding path program 117 times [2021-03-11 00:13:48,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:48,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214200440] [2021-03-11 00:13:48,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:48,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:48,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214200440] [2021-03-11 00:13:48,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113349103] [2021-03-11 00:13:48,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:48,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:13:48,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:48,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:13:48,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:49,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:49,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-03-11 00:13:49,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660064075] [2021-03-11 00:13:49,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:13:49,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:49,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:13:49,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:13:49,064 INFO L87 Difference]: Start difference. First operand 51243 states and 149594 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:49,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:49,526 INFO L93 Difference]: Finished difference Result 60565 states and 176710 transitions. [2021-03-11 00:13:49,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:13:49,527 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:49,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:49,668 INFO L225 Difference]: With dead ends: 60565 [2021-03-11 00:13:49,669 INFO L226 Difference]: Without dead ends: 60463 [2021-03-11 00:13:49,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 373.9ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:13:49,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60463 states. [2021-03-11 00:13:50,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60463 to 60079. [2021-03-11 00:13:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60079 states, 60078 states have (on average 2.9229002297013884) internal successors, (175602), 60078 states have internal predecessors, (175602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60079 states to 60079 states and 175602 transitions. [2021-03-11 00:13:51,060 INFO L78 Accepts]: Start accepts. Automaton has 60079 states and 175602 transitions. Word has length 40 [2021-03-11 00:13:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:51,060 INFO L480 AbstractCegarLoop]: Abstraction has 60079 states and 175602 transitions. [2021-03-11 00:13:51,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:51,060 INFO L276 IsEmpty]: Start isEmpty. Operand 60079 states and 175602 transitions. [2021-03-11 00:13:51,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:51,170 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:51,170 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:51,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-03-11 00:13:51,371 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:51,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:51,371 INFO L82 PathProgramCache]: Analyzing trace with hash -988176450, now seen corresponding path program 118 times [2021-03-11 00:13:51,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:51,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372312972] [2021-03-11 00:13:51,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:51,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:51,472 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:51,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372312972] [2021-03-11 00:13:51,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979715062] [2021-03-11 00:13:51,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:51,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:13:51,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:51,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:13:51,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:51,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:51,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 20 [2021-03-11 00:13:51,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026672124] [2021-03-11 00:13:51,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:13:51,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:51,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:13:51,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:13:51,745 INFO L87 Difference]: Start difference. First operand 60079 states and 175602 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:52,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:52,545 INFO L93 Difference]: Finished difference Result 60715 states and 177258 transitions. [2021-03-11 00:13:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:13:52,545 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:52,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:52,687 INFO L225 Difference]: With dead ends: 60715 [2021-03-11 00:13:52,688 INFO L226 Difference]: Without dead ends: 60599 [2021-03-11 00:13:52,688 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 272.3ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:13:52,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60599 states. [2021-03-11 00:13:53,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60599 to 60005. [2021-03-11 00:13:53,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60005 states, 60004 states have (on average 2.921755216318912) internal successors, (175317), 60004 states have internal predecessors, (175317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:54,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60005 states to 60005 states and 175317 transitions. [2021-03-11 00:13:54,076 INFO L78 Accepts]: Start accepts. Automaton has 60005 states and 175317 transitions. Word has length 40 [2021-03-11 00:13:54,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:54,076 INFO L480 AbstractCegarLoop]: Abstraction has 60005 states and 175317 transitions. [2021-03-11 00:13:54,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:54,076 INFO L276 IsEmpty]: Start isEmpty. Operand 60005 states and 175317 transitions. [2021-03-11 00:13:54,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:54,191 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:54,191 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:54,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:54,391 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:54,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:54,392 INFO L82 PathProgramCache]: Analyzing trace with hash -851969850, now seen corresponding path program 119 times [2021-03-11 00:13:54,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:54,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877638541] [2021-03-11 00:13:54,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:54,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:54,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877638541] [2021-03-11 00:13:54,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612104925] [2021-03-11 00:13:54,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:54,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:13:54,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:54,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:13:54,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:54,751 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:54,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:54,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-03-11 00:13:54,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032627595] [2021-03-11 00:13:54,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:13:54,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:54,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:13:54,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:13:54,752 INFO L87 Difference]: Start difference. First operand 60005 states and 175317 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:55,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:55,234 INFO L93 Difference]: Finished difference Result 64034 states and 186859 transitions. [2021-03-11 00:13:55,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:13:55,235 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:55,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:55,377 INFO L225 Difference]: With dead ends: 64034 [2021-03-11 00:13:55,377 INFO L226 Difference]: Without dead ends: 63910 [2021-03-11 00:13:55,377 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:13:55,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63910 states. [2021-03-11 00:13:56,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63910 to 63433. [2021-03-11 00:13:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63433 states, 63432 states have (on average 2.9227046285786353) internal successors, (185393), 63432 states have internal predecessors, (185393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:57,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63433 states to 63433 states and 185393 transitions. [2021-03-11 00:13:57,425 INFO L78 Accepts]: Start accepts. Automaton has 63433 states and 185393 transitions. Word has length 40 [2021-03-11 00:13:57,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:13:57,425 INFO L480 AbstractCegarLoop]: Abstraction has 63433 states and 185393 transitions. [2021-03-11 00:13:57,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:57,425 INFO L276 IsEmpty]: Start isEmpty. Operand 63433 states and 185393 transitions. [2021-03-11 00:13:57,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:13:57,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:13:57,514 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:13:57,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:57,714 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:13:57,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:13:57,715 INFO L82 PathProgramCache]: Analyzing trace with hash 2140494270, now seen corresponding path program 120 times [2021-03-11 00:13:57,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:13:57,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442130717] [2021-03-11 00:13:57,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:13:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:13:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:13:57,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442130717] [2021-03-11 00:13:57,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530778026] [2021-03-11 00:13:57,821 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:13:57,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:13:57,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:13:57,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:13:57,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:13:58,100 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:13:58,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:13:58,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-03-11 00:13:58,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824572880] [2021-03-11 00:13:58,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:13:58,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:13:58,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:13:58,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:13:58,101 INFO L87 Difference]: Start difference. First operand 63433 states and 185393 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:13:58,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:13:58,610 INFO L93 Difference]: Finished difference Result 67042 states and 195864 transitions. [2021-03-11 00:13:58,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:13:58,611 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:13:58,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:13:58,738 INFO L225 Difference]: With dead ends: 67042 [2021-03-11 00:13:58,738 INFO L226 Difference]: Without dead ends: 66911 [2021-03-11 00:13:58,738 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 288.9ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:13:58,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66911 states. [2021-03-11 00:13:59,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66911 to 66459. [2021-03-11 00:13:59,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66459 states, 66458 states have (on average 2.925546961991032) internal successors, (194426), 66458 states have internal predecessors, (194426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:00,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66459 states to 66459 states and 194426 transitions. [2021-03-11 00:14:00,113 INFO L78 Accepts]: Start accepts. Automaton has 66459 states and 194426 transitions. Word has length 40 [2021-03-11 00:14:00,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:00,113 INFO L480 AbstractCegarLoop]: Abstraction has 66459 states and 194426 transitions. [2021-03-11 00:14:00,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:00,113 INFO L276 IsEmpty]: Start isEmpty. Operand 66459 states and 194426 transitions. [2021-03-11 00:14:00,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:00,215 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:00,215 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:00,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:00,416 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:00,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:00,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1155037826, now seen corresponding path program 121 times [2021-03-11 00:14:00,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:00,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681730706] [2021-03-11 00:14:00,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:00,820 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 10 [2021-03-11 00:14:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:00,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681730706] [2021-03-11 00:14:00,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231402051] [2021-03-11 00:14:00,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:00,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:14:00,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:01,141 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:01,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:01,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2021-03-11 00:14:01,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605550719] [2021-03-11 00:14:01,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:14:01,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:01,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:14:01,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:14:01,142 INFO L87 Difference]: Start difference. First operand 66459 states and 194426 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:01,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:01,737 INFO L93 Difference]: Finished difference Result 67030 states and 195723 transitions. [2021-03-11 00:14:01,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:14:01,738 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:01,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:01,873 INFO L225 Difference]: With dead ends: 67030 [2021-03-11 00:14:01,873 INFO L226 Difference]: Without dead ends: 66900 [2021-03-11 00:14:01,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 614.9ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:14:01,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66900 states. [2021-03-11 00:14:03,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66900 to 66443. [2021-03-11 00:14:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66443 states, 66442 states have (on average 2.925589235724391) internal successors, (194382), 66442 states have internal predecessors, (194382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:03,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66443 states to 66443 states and 194382 transitions. [2021-03-11 00:14:03,210 INFO L78 Accepts]: Start accepts. Automaton has 66443 states and 194382 transitions. Word has length 40 [2021-03-11 00:14:03,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:03,210 INFO L480 AbstractCegarLoop]: Abstraction has 66443 states and 194382 transitions. [2021-03-11 00:14:03,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:03,210 INFO L276 IsEmpty]: Start isEmpty. Operand 66443 states and 194382 transitions. [2021-03-11 00:14:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:03,295 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:03,295 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:03,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-03-11 00:14:03,496 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:03,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:03,496 INFO L82 PathProgramCache]: Analyzing trace with hash 2930118, now seen corresponding path program 122 times [2021-03-11 00:14:03,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:03,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662030746] [2021-03-11 00:14:03,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:14:03,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662030746] [2021-03-11 00:14:03,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121398185] [2021-03-11 00:14:03,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:03,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:14:03,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:03,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:14:03,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:03,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:03,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:03,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-03-11 00:14:03,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155573846] [2021-03-11 00:14:03,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:14:03,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:03,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:14:03,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:14:03,924 INFO L87 Difference]: Start difference. First operand 66443 states and 194382 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:04,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:04,562 INFO L93 Difference]: Finished difference Result 68535 states and 200372 transitions. [2021-03-11 00:14:04,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:14:04,563 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:04,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:04,678 INFO L225 Difference]: With dead ends: 68535 [2021-03-11 00:14:04,678 INFO L226 Difference]: Without dead ends: 68411 [2021-03-11 00:14:04,678 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 319.1ms TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:14:04,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68411 states. [2021-03-11 00:14:05,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68411 to 68001. [2021-03-11 00:14:05,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68001 states, 68000 states have (on average 2.927691176470588) internal successors, (199083), 68000 states have internal predecessors, (199083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:05,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68001 states to 68001 states and 199083 transitions. [2021-03-11 00:14:05,922 INFO L78 Accepts]: Start accepts. Automaton has 68001 states and 199083 transitions. Word has length 40 [2021-03-11 00:14:05,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:05,922 INFO L480 AbstractCegarLoop]: Abstraction has 68001 states and 199083 transitions. [2021-03-11 00:14:05,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:05,922 INFO L276 IsEmpty]: Start isEmpty. Operand 68001 states and 199083 transitions. [2021-03-11 00:14:06,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:06,010 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:06,010 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:06,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:06,210 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:06,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:06,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1002365318, now seen corresponding path program 123 times [2021-03-11 00:14:06,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:06,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248220916] [2021-03-11 00:14:06,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:14:06,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248220916] [2021-03-11 00:14:06,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552959615] [2021-03-11 00:14:06,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:06,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:14:06,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:06,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:14:06,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:06,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:06,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2021-03-11 00:14:06,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057878365] [2021-03-11 00:14:06,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:14:06,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:06,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:14:06,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:14:06,649 INFO L87 Difference]: Start difference. First operand 68001 states and 199083 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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) [2021-03-11 00:14:07,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:07,512 INFO L93 Difference]: Finished difference Result 68536 states and 200289 transitions. [2021-03-11 00:14:07,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:14:07,513 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:07,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:07,628 INFO L225 Difference]: With dead ends: 68536 [2021-03-11 00:14:07,628 INFO L226 Difference]: Without dead ends: 68406 [2021-03-11 00:14:07,628 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 346.6ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:14:07,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68406 states. [2021-03-11 00:14:08,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68406 to 67985. [2021-03-11 00:14:08,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67985 states, 67984 states have (on average 2.9277329959990586) internal successors, (199039), 67984 states have internal predecessors, (199039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:08,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67985 states to 67985 states and 199039 transitions. [2021-03-11 00:14:08,910 INFO L78 Accepts]: Start accepts. Automaton has 67985 states and 199039 transitions. Word has length 40 [2021-03-11 00:14:08,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:08,910 INFO L480 AbstractCegarLoop]: Abstraction has 67985 states and 199039 transitions. [2021-03-11 00:14:08,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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) [2021-03-11 00:14:08,910 INFO L276 IsEmpty]: Start isEmpty. Operand 67985 states and 199039 transitions. [2021-03-11 00:14:08,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:08,997 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:08,997 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:09,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-03-11 00:14:09,198 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:09,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:09,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1831854650, now seen corresponding path program 124 times [2021-03-11 00:14:09,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:09,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746802506] [2021-03-11 00:14:09,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:09,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:09,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:09,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746802506] [2021-03-11 00:14:09,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115821846] [2021-03-11 00:14:09,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:09,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:14:09,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:09,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:14:09,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:09,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:09,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-03-11 00:14:09,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729753072] [2021-03-11 00:14:09,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:14:09,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:09,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:14:09,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:14:09,686 INFO L87 Difference]: Start difference. First operand 67985 states and 199039 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:10,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:10,282 INFO L93 Difference]: Finished difference Result 68495 states and 200183 transitions. [2021-03-11 00:14:10,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:14:10,283 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:10,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:10,714 INFO L225 Difference]: With dead ends: 68495 [2021-03-11 00:14:10,715 INFO L226 Difference]: Without dead ends: 68419 [2021-03-11 00:14:10,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 361.6ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:14:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68419 states. [2021-03-11 00:14:11,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68419 to 67979. [2021-03-11 00:14:11,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67979 states, 67978 states have (on average 2.927770749360087) internal successors, (199024), 67978 states have internal predecessors, (199024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67979 states to 67979 states and 199024 transitions. [2021-03-11 00:14:12,034 INFO L78 Accepts]: Start accepts. Automaton has 67979 states and 199024 transitions. Word has length 40 [2021-03-11 00:14:12,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:12,034 INFO L480 AbstractCegarLoop]: Abstraction has 67979 states and 199024 transitions. [2021-03-11 00:14:12,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 67979 states and 199024 transitions. [2021-03-11 00:14:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:12,124 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:12,124 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:12,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:12,324 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:12,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:12,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1497503238, now seen corresponding path program 125 times [2021-03-11 00:14:12,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:12,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318722320] [2021-03-11 00:14:12,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:12,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:12,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318722320] [2021-03-11 00:14:12,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171784267] [2021-03-11 00:14:12,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:12,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:14:12,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:12,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:14:12,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:12,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:12,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-03-11 00:14:12,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61048812] [2021-03-11 00:14:12,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:14:12,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:12,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:14:12,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:14:12,692 INFO L87 Difference]: Start difference. First operand 67979 states and 199024 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:13,141 INFO L93 Difference]: Finished difference Result 90722 states and 265525 transitions. [2021-03-11 00:14:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:14:13,141 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:13,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:13,287 INFO L225 Difference]: With dead ends: 90722 [2021-03-11 00:14:13,287 INFO L226 Difference]: Without dead ends: 90685 [2021-03-11 00:14:13,287 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 260.3ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90685 states. [2021-03-11 00:14:14,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90685 to 67987. [2021-03-11 00:14:14,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67987 states, 67986 states have (on average 2.9277204130262113) internal successors, (199044), 67986 states have internal predecessors, (199044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67987 states to 67987 states and 199044 transitions. [2021-03-11 00:14:15,085 INFO L78 Accepts]: Start accepts. Automaton has 67987 states and 199044 transitions. Word has length 40 [2021-03-11 00:14:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:15,085 INFO L480 AbstractCegarLoop]: Abstraction has 67987 states and 199044 transitions. [2021-03-11 00:14:15,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 67987 states and 199044 transitions. [2021-03-11 00:14:15,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:15,175 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:15,175 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:15,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:15,375 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:15,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:15,376 INFO L82 PathProgramCache]: Analyzing trace with hash -627011198, now seen corresponding path program 126 times [2021-03-11 00:14:15,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:15,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718087410] [2021-03-11 00:14:15,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:15,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:15,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718087410] [2021-03-11 00:14:15,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401561617] [2021-03-11 00:14:15,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:15,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:14:15,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:15,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:14:15,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:15,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:15,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-03-11 00:14:15,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000291332] [2021-03-11 00:14:15,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:14:15,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:15,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:14:15,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:15,816 INFO L87 Difference]: Start difference. First operand 67987 states and 199044 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2021-03-11 00:14:16,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:16,304 INFO L93 Difference]: Finished difference Result 90666 states and 265433 transitions. [2021-03-11 00:14:16,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-11 00:14:16,304 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:16,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:16,459 INFO L225 Difference]: With dead ends: 90666 [2021-03-11 00:14:16,459 INFO L226 Difference]: Without dead ends: 90629 [2021-03-11 00:14:16,460 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:14:16,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90629 states. [2021-03-11 00:14:18,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90629 to 68009. [2021-03-11 00:14:18,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68009 states, 68008 states have (on average 2.9277290906952125) internal successors, (199109), 68008 states have internal predecessors, (199109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68009 states to 68009 states and 199109 transitions. [2021-03-11 00:14:18,289 INFO L78 Accepts]: Start accepts. Automaton has 68009 states and 199109 transitions. Word has length 40 [2021-03-11 00:14:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:18,289 INFO L480 AbstractCegarLoop]: Abstraction has 68009 states and 199109 transitions. [2021-03-11 00:14:18,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2021-03-11 00:14:18,289 INFO L276 IsEmpty]: Start isEmpty. Operand 68009 states and 199109 transitions. [2021-03-11 00:14:18,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:18,376 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:18,376 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:18,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:18,576 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:18,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:18,576 INFO L82 PathProgramCache]: Analyzing trace with hash 2073309766, now seen corresponding path program 127 times [2021-03-11 00:14:18,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:18,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673606935] [2021-03-11 00:14:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:18,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:18,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673606935] [2021-03-11 00:14:18,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000214081] [2021-03-11 00:14:18,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:18,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:14:18,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:18,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:18,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-03-11 00:14:18,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419373082] [2021-03-11 00:14:18,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:14:18,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:18,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:14:18,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:14:18,925 INFO L87 Difference]: Start difference. First operand 68009 states and 199109 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:19,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:19,494 INFO L93 Difference]: Finished difference Result 92337 states and 270262 transitions. [2021-03-11 00:14:19,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:14:19,495 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:19,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:19,649 INFO L225 Difference]: With dead ends: 92337 [2021-03-11 00:14:19,649 INFO L226 Difference]: Without dead ends: 92263 [2021-03-11 00:14:19,649 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 270.9ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:14:19,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92263 states. [2021-03-11 00:14:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92263 to 69561. [2021-03-11 00:14:21,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69561 states, 69560 states have (on average 2.9280764807360553) internal successors, (203677), 69560 states have internal predecessors, (203677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:21,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69561 states to 69561 states and 203677 transitions. [2021-03-11 00:14:21,552 INFO L78 Accepts]: Start accepts. Automaton has 69561 states and 203677 transitions. Word has length 40 [2021-03-11 00:14:21,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:21,552 INFO L480 AbstractCegarLoop]: Abstraction has 69561 states and 203677 transitions. [2021-03-11 00:14:21,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:21,553 INFO L276 IsEmpty]: Start isEmpty. Operand 69561 states and 203677 transitions. [2021-03-11 00:14:21,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:21,645 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:21,645 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:21,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-03-11 00:14:21,845 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:21,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:21,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1408085314, now seen corresponding path program 128 times [2021-03-11 00:14:21,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:21,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725172955] [2021-03-11 00:14:21,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:21,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725172955] [2021-03-11 00:14:21,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844607235] [2021-03-11 00:14:21,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:22,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:14:22,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:22,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:14:22,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:22,235 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:22,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:22,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-03-11 00:14:22,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137066322] [2021-03-11 00:14:22,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:14:22,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:22,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:14:22,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:22,236 INFO L87 Difference]: Start difference. First operand 69561 states and 203677 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2021-03-11 00:14:22,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:22,902 INFO L93 Difference]: Finished difference Result 95343 states and 279067 transitions. [2021-03-11 00:14:22,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:14:22,903 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:22,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:23,061 INFO L225 Difference]: With dead ends: 95343 [2021-03-11 00:14:23,062 INFO L226 Difference]: Without dead ends: 95237 [2021-03-11 00:14:23,062 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 332.8ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:14:23,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95237 states. [2021-03-11 00:14:24,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95237 to 72383. [2021-03-11 00:14:24,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72383 states, 72382 states have (on average 2.9288773451963195) internal successors, (211998), 72382 states have internal predecessors, (211998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:24,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72383 states to 72383 states and 211998 transitions. [2021-03-11 00:14:24,916 INFO L78 Accepts]: Start accepts. Automaton has 72383 states and 211998 transitions. Word has length 40 [2021-03-11 00:14:24,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:24,916 INFO L480 AbstractCegarLoop]: Abstraction has 72383 states and 211998 transitions. [2021-03-11 00:14:24,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2021-03-11 00:14:24,916 INFO L276 IsEmpty]: Start isEmpty. Operand 72383 states and 211998 transitions. [2021-03-11 00:14:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:25,009 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:25,009 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:25,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-03-11 00:14:25,209 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:25,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:25,209 INFO L82 PathProgramCache]: Analyzing trace with hash -346917946, now seen corresponding path program 129 times [2021-03-11 00:14:25,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:25,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865583157] [2021-03-11 00:14:25,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:25,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865583157] [2021-03-11 00:14:25,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186692783] [2021-03-11 00:14:25,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:25,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:14:25,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:25,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:14:25,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:25,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:25,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-03-11 00:14:25,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915409911] [2021-03-11 00:14:25,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:14:25,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:25,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:14:25,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:25,577 INFO L87 Difference]: Start difference. First operand 72383 states and 211998 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2021-03-11 00:14:26,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:26,348 INFO L93 Difference]: Finished difference Result 99635 states and 291873 transitions. [2021-03-11 00:14:26,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:14:26,349 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:26,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:26,531 INFO L225 Difference]: With dead ends: 99635 [2021-03-11 00:14:26,531 INFO L226 Difference]: Without dead ends: 99545 [2021-03-11 00:14:26,531 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 375.1ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:14:27,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99545 states. [2021-03-11 00:14:28,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99545 to 76561. [2021-03-11 00:14:28,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76561 states, 76560 states have (on average 2.9320402298850574) internal successors, (224477), 76560 states have internal predecessors, (224477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:28,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76561 states to 76561 states and 224477 transitions. [2021-03-11 00:14:28,471 INFO L78 Accepts]: Start accepts. Automaton has 76561 states and 224477 transitions. Word has length 40 [2021-03-11 00:14:28,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:28,471 INFO L480 AbstractCegarLoop]: Abstraction has 76561 states and 224477 transitions. [2021-03-11 00:14:28,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2021-03-11 00:14:28,472 INFO L276 IsEmpty]: Start isEmpty. Operand 76561 states and 224477 transitions. [2021-03-11 00:14:28,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:28,571 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:28,571 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:28,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-03-11 00:14:28,771 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:28,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:28,771 INFO L82 PathProgramCache]: Analyzing trace with hash -466000958, now seen corresponding path program 130 times [2021-03-11 00:14:28,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:28,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586839533] [2021-03-11 00:14:28,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:28,902 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:28,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586839533] [2021-03-11 00:14:28,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474929160] [2021-03-11 00:14:28,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:28,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:14:28,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:28,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:14:28,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:29,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:29,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-03-11 00:14:29,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008169005] [2021-03-11 00:14:29,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:14:29,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:29,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:14:29,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:29,132 INFO L87 Difference]: Start difference. First operand 76561 states and 224477 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2021-03-11 00:14:30,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:30,406 INFO L93 Difference]: Finished difference Result 99676 states and 291945 transitions. [2021-03-11 00:14:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:14:30,415 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:30,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:30,667 INFO L225 Difference]: With dead ends: 99676 [2021-03-11 00:14:30,668 INFO L226 Difference]: Without dead ends: 99566 [2021-03-11 00:14:30,668 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 372.8ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:14:30,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99566 states. [2021-03-11 00:14:31,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99566 to 73179. [2021-03-11 00:14:32,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73179 states, 73178 states have (on average 2.929186367487496) internal successors, (214352), 73178 states have internal predecessors, (214352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:32,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73179 states to 73179 states and 214352 transitions. [2021-03-11 00:14:32,225 INFO L78 Accepts]: Start accepts. Automaton has 73179 states and 214352 transitions. Word has length 40 [2021-03-11 00:14:32,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:32,225 INFO L480 AbstractCegarLoop]: Abstraction has 73179 states and 214352 transitions. [2021-03-11 00:14:32,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 20 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) [2021-03-11 00:14:32,225 INFO L276 IsEmpty]: Start isEmpty. Operand 73179 states and 214352 transitions. [2021-03-11 00:14:32,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:32,324 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:32,324 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:32,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:32,524 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:32,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:32,524 INFO L82 PathProgramCache]: Analyzing trace with hash -2017252144, now seen corresponding path program 131 times [2021-03-11 00:14:32,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:32,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831560928] [2021-03-11 00:14:32,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:32,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831560928] [2021-03-11 00:14:32,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385524253] [2021-03-11 00:14:32,706 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:32,726 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:14:32,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:32,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:14:32,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:32,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:32,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-03-11 00:14:32,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778118023] [2021-03-11 00:14:32,937 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:14:32,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:32,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:14:32,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:32,937 INFO L87 Difference]: Start difference. First operand 73179 states and 214352 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:33,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:33,430 INFO L93 Difference]: Finished difference Result 78341 states and 228550 transitions. [2021-03-11 00:14:33,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:14:33,431 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:33,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:34,023 INFO L225 Difference]: With dead ends: 78341 [2021-03-11 00:14:34,023 INFO L226 Difference]: Without dead ends: 78267 [2021-03-11 00:14:34,023 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 320.2ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:14:34,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78267 states. [2021-03-11 00:14:35,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78267 to 74429. [2021-03-11 00:14:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74429 states, 74428 states have (on average 2.929824797119364) internal successors, (218061), 74428 states have internal predecessors, (218061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:35,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74429 states to 74429 states and 218061 transitions. [2021-03-11 00:14:35,468 INFO L78 Accepts]: Start accepts. Automaton has 74429 states and 218061 transitions. Word has length 40 [2021-03-11 00:14:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:35,468 INFO L480 AbstractCegarLoop]: Abstraction has 74429 states and 218061 transitions. [2021-03-11 00:14:35,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 74429 states and 218061 transitions. [2021-03-11 00:14:35,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:35,571 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:35,571 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:35,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-03-11 00:14:35,772 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:35,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:35,772 INFO L82 PathProgramCache]: Analyzing trace with hash -727268640, now seen corresponding path program 132 times [2021-03-11 00:14:35,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:35,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103512032] [2021-03-11 00:14:35,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:35,910 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:35,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103512032] [2021-03-11 00:14:35,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143467061] [2021-03-11 00:14:35,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:35,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:14:35,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:35,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:14:35,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:36,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:36,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-03-11 00:14:36,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511102686] [2021-03-11 00:14:36,154 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:14:36,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:36,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:14:36,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:36,155 INFO L87 Difference]: Start difference. First operand 74429 states and 218061 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:36,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:36,638 INFO L93 Difference]: Finished difference Result 79441 states and 231842 transitions. [2021-03-11 00:14:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:14:36,639 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:36,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:36,773 INFO L225 Difference]: With dead ends: 79441 [2021-03-11 00:14:36,774 INFO L226 Difference]: Without dead ends: 79367 [2021-03-11 00:14:36,774 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 297.6ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:14:36,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79367 states. [2021-03-11 00:14:38,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79367 to 74331. [2021-03-11 00:14:38,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74331 states, 74330 states have (on average 2.9302569621956143) internal successors, (217806), 74330 states have internal predecessors, (217806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:38,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74331 states to 74331 states and 217806 transitions. [2021-03-11 00:14:38,612 INFO L78 Accepts]: Start accepts. Automaton has 74331 states and 217806 transitions. Word has length 40 [2021-03-11 00:14:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:38,612 INFO L480 AbstractCegarLoop]: Abstraction has 74331 states and 217806 transitions. [2021-03-11 00:14:38,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:38,612 INFO L276 IsEmpty]: Start isEmpty. Operand 74331 states and 217806 transitions. [2021-03-11 00:14:38,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:38,713 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:38,714 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:38,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-03-11 00:14:38,914 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:38,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:38,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1155007878, now seen corresponding path program 133 times [2021-03-11 00:14:38,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:38,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660714810] [2021-03-11 00:14:38,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:39,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660714810] [2021-03-11 00:14:39,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927837098] [2021-03-11 00:14:39,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-11 00:14:39,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:39,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:14:39,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:39,369 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:39,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:39,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-03-11 00:14:39,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618194903] [2021-03-11 00:14:39,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:14:39,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:39,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:14:39,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:39,371 INFO L87 Difference]: Start difference. First operand 74331 states and 217806 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:39,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:39,984 INFO L93 Difference]: Finished difference Result 80935 states and 236245 transitions. [2021-03-11 00:14:39,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:14:39,985 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:39,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:40,132 INFO L225 Difference]: With dead ends: 80935 [2021-03-11 00:14:40,133 INFO L226 Difference]: Without dead ends: 80821 [2021-03-11 00:14:40,133 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 382.7ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:14:40,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80821 states. [2021-03-11 00:14:41,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80821 to 76503. [2021-03-11 00:14:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76503 states, 76502 states have (on average 2.931269770724948) internal successors, (224248), 76502 states have internal predecessors, (224248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:42,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76503 states to 76503 states and 224248 transitions. [2021-03-11 00:14:42,069 INFO L78 Accepts]: Start accepts. Automaton has 76503 states and 224248 transitions. Word has length 40 [2021-03-11 00:14:42,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:42,069 INFO L480 AbstractCegarLoop]: Abstraction has 76503 states and 224248 transitions. [2021-03-11 00:14:42,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 76503 states and 224248 transitions. [2021-03-11 00:14:42,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:42,173 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:42,173 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:42,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-03-11 00:14:42,374 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:42,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:42,374 INFO L82 PathProgramCache]: Analyzing trace with hash -862357216, now seen corresponding path program 134 times [2021-03-11 00:14:42,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:42,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169914002] [2021-03-11 00:14:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:42,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169914002] [2021-03-11 00:14:42,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375876251] [2021-03-11 00:14:42,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:42,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:14:42,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:42,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:14:42,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:42,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:42,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-03-11 00:14:42,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048521666] [2021-03-11 00:14:42,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:14:42,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:42,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:14:42,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:42,748 INFO L87 Difference]: Start difference. First operand 76503 states and 224248 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:43,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:43,380 INFO L93 Difference]: Finished difference Result 85572 states and 250216 transitions. [2021-03-11 00:14:43,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:14:43,381 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:43,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:43,528 INFO L225 Difference]: With dead ends: 85572 [2021-03-11 00:14:43,528 INFO L226 Difference]: Without dead ends: 85482 [2021-03-11 00:14:43,528 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 342.5ms TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:14:43,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85482 states. [2021-03-11 00:14:45,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85482 to 80465. [2021-03-11 00:14:45,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80465 states, 80464 states have (on average 2.9361577848478824) internal successors, (236255), 80464 states have internal predecessors, (236255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:45,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80465 states to 80465 states and 236255 transitions. [2021-03-11 00:14:45,765 INFO L78 Accepts]: Start accepts. Automaton has 80465 states and 236255 transitions. Word has length 40 [2021-03-11 00:14:45,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:45,765 INFO L480 AbstractCegarLoop]: Abstraction has 80465 states and 236255 transitions. [2021-03-11 00:14:45,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:45,765 INFO L276 IsEmpty]: Start isEmpty. Operand 80465 states and 236255 transitions. [2021-03-11 00:14:45,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:45,873 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:45,873 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:46,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-03-11 00:14:46,074 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:46,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:46,074 INFO L82 PathProgramCache]: Analyzing trace with hash -981440228, now seen corresponding path program 135 times [2021-03-11 00:14:46,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:46,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842611688] [2021-03-11 00:14:46,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:14:46,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842611688] [2021-03-11 00:14:46,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413548073] [2021-03-11 00:14:46,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:46,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:14:46,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:46,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:14:46,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:46,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:46,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-03-11 00:14:46,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005591105] [2021-03-11 00:14:46,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:14:46,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:46,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:14:46,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:14:46,425 INFO L87 Difference]: Start difference. First operand 80465 states and 236255 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:47,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:47,142 INFO L93 Difference]: Finished difference Result 85569 states and 250197 transitions. [2021-03-11 00:14:47,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:14:47,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:47,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:47,290 INFO L225 Difference]: With dead ends: 85569 [2021-03-11 00:14:47,290 INFO L226 Difference]: Without dead ends: 85453 [2021-03-11 00:14:47,290 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 331.8ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:14:47,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85453 states. [2021-03-11 00:14:48,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85453 to 80371. [2021-03-11 00:14:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80371 states, 80370 states have (on average 2.934801542864253) internal successors, (235870), 80370 states have internal predecessors, (235870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80371 states to 80371 states and 235870 transitions. [2021-03-11 00:14:49,249 INFO L78 Accepts]: Start accepts. Automaton has 80371 states and 235870 transitions. Word has length 40 [2021-03-11 00:14:49,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:49,249 INFO L480 AbstractCegarLoop]: Abstraction has 80371 states and 235870 transitions. [2021-03-11 00:14:49,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:49,249 INFO L276 IsEmpty]: Start isEmpty. Operand 80371 states and 235870 transitions. [2021-03-11 00:14:49,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:49,368 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:49,368 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:49,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-03-11 00:14:49,569 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:49,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:49,569 INFO L82 PathProgramCache]: Analyzing trace with hash -837152646, now seen corresponding path program 136 times [2021-03-11 00:14:49,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:49,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669646453] [2021-03-11 00:14:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:49,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669646453] [2021-03-11 00:14:49,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444495074] [2021-03-11 00:14:49,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:49,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:14:49,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:49,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:14:49,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:49,928 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:49,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:49,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-03-11 00:14:49,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800688086] [2021-03-11 00:14:49,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:14:49,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:49,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:14:49,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:49,929 INFO L87 Difference]: Start difference. First operand 80371 states and 235870 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:50,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:50,606 INFO L93 Difference]: Finished difference Result 84520 states and 246996 transitions. [2021-03-11 00:14:50,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:14:50,607 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:50,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:50,748 INFO L225 Difference]: With dead ends: 84520 [2021-03-11 00:14:50,748 INFO L226 Difference]: Without dead ends: 84396 [2021-03-11 00:14:50,748 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 334.0ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-03-11 00:14:50,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84396 states. [2021-03-11 00:14:52,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84396 to 77497. [2021-03-11 00:14:52,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77497 states, 77496 states have (on average 2.9343579023433466) internal successors, (227401), 77496 states have internal predecessors, (227401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77497 states to 77497 states and 227401 transitions. [2021-03-11 00:14:52,596 INFO L78 Accepts]: Start accepts. Automaton has 77497 states and 227401 transitions. Word has length 40 [2021-03-11 00:14:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:52,596 INFO L480 AbstractCegarLoop]: Abstraction has 77497 states and 227401 transitions. [2021-03-11 00:14:52,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:52,596 INFO L276 IsEmpty]: Start isEmpty. Operand 77497 states and 227401 transitions. [2021-03-11 00:14:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:52,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:52,702 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:52,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:52,903 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:52,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:52,903 INFO L82 PathProgramCache]: Analyzing trace with hash 762977632, now seen corresponding path program 137 times [2021-03-11 00:14:52,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:52,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455379946] [2021-03-11 00:14:52,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:53,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455379946] [2021-03-11 00:14:53,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839283586] [2021-03-11 00:14:53,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:53,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-11 00:14:53,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:53,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:14:53,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:53,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:53,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-03-11 00:14:53,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475057689] [2021-03-11 00:14:53,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:14:53,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:53,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:14:53,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:14:53,323 INFO L87 Difference]: Start difference. First operand 77497 states and 227401 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:53,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:53,816 INFO L93 Difference]: Finished difference Result 81159 states and 237937 transitions. [2021-03-11 00:14:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:14:53,816 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:53,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:53,957 INFO L225 Difference]: With dead ends: 81159 [2021-03-11 00:14:53,958 INFO L226 Difference]: Without dead ends: 81085 [2021-03-11 00:14:53,958 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 324.5ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:14:54,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81085 states. [2021-03-11 00:14:55,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81085 to 80725. [2021-03-11 00:14:55,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80725 states, 80724 states have (on average 2.935471483078143) internal successors, (236963), 80724 states have internal predecessors, (236963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:55,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80725 states to 80725 states and 236963 transitions. [2021-03-11 00:14:55,828 INFO L78 Accepts]: Start accepts. Automaton has 80725 states and 236963 transitions. Word has length 40 [2021-03-11 00:14:55,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:55,828 INFO L480 AbstractCegarLoop]: Abstraction has 80725 states and 236963 transitions. [2021-03-11 00:14:55,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:55,828 INFO L276 IsEmpty]: Start isEmpty. Operand 80725 states and 236963 transitions. [2021-03-11 00:14:55,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:55,934 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:55,934 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:56,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-03-11 00:14:56,135 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:56,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:56,135 INFO L82 PathProgramCache]: Analyzing trace with hash 1088400518, now seen corresponding path program 138 times [2021-03-11 00:14:56,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:56,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150247616] [2021-03-11 00:14:56,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:56,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150247616] [2021-03-11 00:14:56,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056428103] [2021-03-11 00:14:56,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:56,309 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:14:56,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:14:56,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:14:56,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:56,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:56,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 21 [2021-03-11 00:14:56,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821122552] [2021-03-11 00:14:56,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:14:56,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:56,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:14:56,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:14:56,555 INFO L87 Difference]: Start difference. First operand 80725 states and 236963 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:57,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:14:57,078 INFO L93 Difference]: Finished difference Result 82885 states and 243040 transitions. [2021-03-11 00:14:57,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:14:57,079 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:14:57,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:14:57,217 INFO L225 Difference]: With dead ends: 82885 [2021-03-11 00:14:57,217 INFO L226 Difference]: Without dead ends: 82811 [2021-03-11 00:14:57,217 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 338.3ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:14:57,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82811 states. [2021-03-11 00:14:58,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82811 to 79693. [2021-03-11 00:14:58,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79693 states, 79692 states have (on average 2.936693771018421) internal successors, (234031), 79692 states have internal predecessors, (234031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:59,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79693 states to 79693 states and 234031 transitions. [2021-03-11 00:14:59,059 INFO L78 Accepts]: Start accepts. Automaton has 79693 states and 234031 transitions. Word has length 40 [2021-03-11 00:14:59,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:14:59,060 INFO L480 AbstractCegarLoop]: Abstraction has 79693 states and 234031 transitions. [2021-03-11 00:14:59,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:14:59,060 INFO L276 IsEmpty]: Start isEmpty. Operand 79693 states and 234031 transitions. [2021-03-11 00:14:59,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:14:59,161 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:14:59,161 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:14:59,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-03-11 00:14:59,362 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:14:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:14:59,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1493177376, now seen corresponding path program 139 times [2021-03-11 00:14:59,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:14:59,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700102276] [2021-03-11 00:14:59,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:14:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:59,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700102276] [2021-03-11 00:14:59,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107335041] [2021-03-11 00:14:59,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:14:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:14:59,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:14:59,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:14:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:14:59,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:14:59,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2021-03-11 00:14:59,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198547974] [2021-03-11 00:14:59,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:14:59,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:14:59,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:14:59,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:14:59,743 INFO L87 Difference]: Start difference. First operand 79693 states and 234031 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:00,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:00,370 INFO L93 Difference]: Finished difference Result 83407 states and 244529 transitions. [2021-03-11 00:15:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:15:00,371 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:15:00,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:00,519 INFO L225 Difference]: With dead ends: 83407 [2021-03-11 00:15:00,519 INFO L226 Difference]: Without dead ends: 83293 [2021-03-11 00:15:00,519 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 311.9ms TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:15:00,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83293 states. [2021-03-11 00:15:02,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83293 to 79305. [2021-03-11 00:15:02,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79305 states, 79304 states have (on average 2.9381998385957835) internal successors, (233011), 79304 states have internal predecessors, (233011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:02,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79305 states to 79305 states and 233011 transitions. [2021-03-11 00:15:02,558 INFO L78 Accepts]: Start accepts. Automaton has 79305 states and 233011 transitions. Word has length 40 [2021-03-11 00:15:02,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:02,559 INFO L480 AbstractCegarLoop]: Abstraction has 79305 states and 233011 transitions. [2021-03-11 00:15:02,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:02,559 INFO L276 IsEmpty]: Start isEmpty. Operand 79305 states and 233011 transitions. [2021-03-11 00:15:02,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:15:02,677 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:02,678 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:02,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:02,878 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:02,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:02,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1063230778, now seen corresponding path program 140 times [2021-03-11 00:15:02,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:02,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094594751] [2021-03-11 00:15:02,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:02,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:02,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094594751] [2021-03-11 00:15:02,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883283727] [2021-03-11 00:15:02,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:03,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:15:03,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:03,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:15:03,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:03,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:03,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 20 [2021-03-11 00:15:03,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240443259] [2021-03-11 00:15:03,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:15:03,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:03,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:15:03,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:15:03,265 INFO L87 Difference]: Start difference. First operand 79305 states and 233011 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:03,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:03,951 INFO L93 Difference]: Finished difference Result 83755 states and 246131 transitions. [2021-03-11 00:15:03,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:15:03,952 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:15:03,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:04,117 INFO L225 Difference]: With dead ends: 83755 [2021-03-11 00:15:04,117 INFO L226 Difference]: Without dead ends: 83665 [2021-03-11 00:15:04,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 319.9ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:15:04,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83665 states. [2021-03-11 00:15:05,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83665 to 82559. [2021-03-11 00:15:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82559 states, 82558 states have (on average 2.9423677899173915) internal successors, (242916), 82558 states have internal predecessors, (242916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:06,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82559 states to 82559 states and 242916 transitions. [2021-03-11 00:15:06,087 INFO L78 Accepts]: Start accepts. Automaton has 82559 states and 242916 transitions. Word has length 40 [2021-03-11 00:15:06,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:06,087 INFO L480 AbstractCegarLoop]: Abstraction has 82559 states and 242916 transitions. [2021-03-11 00:15:06,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:06,087 INFO L276 IsEmpty]: Start isEmpty. Operand 82559 states and 242916 transitions. [2021-03-11 00:15:06,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:15:06,203 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:06,203 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:06,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-03-11 00:15:06,407 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:06,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:06,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1182313790, now seen corresponding path program 141 times [2021-03-11 00:15:06,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:06,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108919533] [2021-03-11 00:15:06,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:06,512 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:15:06,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108919533] [2021-03-11 00:15:06,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258432213] [2021-03-11 00:15:06,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:06,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-11 00:15:06,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:06,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:15:06,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:06,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:06,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-03-11 00:15:06,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91302784] [2021-03-11 00:15:06,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-11 00:15:06,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:06,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-11 00:15:06,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-03-11 00:15:06,760 INFO L87 Difference]: Start difference. First operand 82559 states and 242916 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:07,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:07,414 INFO L93 Difference]: Finished difference Result 83722 states and 246052 transitions. [2021-03-11 00:15:07,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:15:07,415 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:15:07,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:07,560 INFO L225 Difference]: With dead ends: 83722 [2021-03-11 00:15:07,560 INFO L226 Difference]: Without dead ends: 83606 [2021-03-11 00:15:07,561 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:15:07,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83606 states. [2021-03-11 00:15:09,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83606 to 82485. [2021-03-11 00:15:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82485 states, 82484 states have (on average 2.941237088405024) internal successors, (242605), 82484 states have internal predecessors, (242605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:09,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82485 states to 82485 states and 242605 transitions. [2021-03-11 00:15:09,538 INFO L78 Accepts]: Start accepts. Automaton has 82485 states and 242605 transitions. Word has length 40 [2021-03-11 00:15:09,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:09,538 INFO L480 AbstractCegarLoop]: Abstraction has 82485 states and 242605 transitions. [2021-03-11 00:15:09,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:09,539 INFO L276 IsEmpty]: Start isEmpty. Operand 82485 states and 242605 transitions. [2021-03-11 00:15:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:15:09,681 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:09,681 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:09,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:09,882 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:09,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:09,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1038026208, now seen corresponding path program 142 times [2021-03-11 00:15:09,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:09,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115780561] [2021-03-11 00:15:09,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:15:10,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115780561] [2021-03-11 00:15:10,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825928253] [2021-03-11 00:15:10,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:10,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:15:10,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:10,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:15:10,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:10,248 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:10,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:10,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-03-11 00:15:10,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824231764] [2021-03-11 00:15:10,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:15:10,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:10,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:15:10,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:15:10,249 INFO L87 Difference]: Start difference. First operand 82485 states and 242605 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:10,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:10,848 INFO L93 Difference]: Finished difference Result 83267 states and 244512 transitions. [2021-03-11 00:15:10,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:15:10,848 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:15:10,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:11,003 INFO L225 Difference]: With dead ends: 83267 [2021-03-11 00:15:11,003 INFO L226 Difference]: Without dead ends: 83136 [2021-03-11 00:15:11,003 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 313.2ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:15:11,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83136 states. [2021-03-11 00:15:12,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83136 to 82471. [2021-03-11 00:15:12,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82471 states, 82470 states have (on average 2.9407299624105736) internal successors, (242522), 82470 states have internal predecessors, (242522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82471 states to 82471 states and 242522 transitions. [2021-03-11 00:15:13,009 INFO L78 Accepts]: Start accepts. Automaton has 82471 states and 242522 transitions. Word has length 40 [2021-03-11 00:15:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:13,009 INFO L480 AbstractCegarLoop]: Abstraction has 82471 states and 242522 transitions. [2021-03-11 00:15:13,009 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:13,009 INFO L276 IsEmpty]: Start isEmpty. Operand 82471 states and 242522 transitions. [2021-03-11 00:15:13,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:15:13,126 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:13,127 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:13,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:13,327 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:13,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:13,327 INFO L82 PathProgramCache]: Analyzing trace with hash -38591008, now seen corresponding path program 143 times [2021-03-11 00:15:13,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:13,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602828710] [2021-03-11 00:15:13,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:13,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:13,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602828710] [2021-03-11 00:15:13,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319599070] [2021-03-11 00:15:13,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:13,495 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-11 00:15:13,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:13,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:15:13,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:13,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:13,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-03-11 00:15:13,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790626893] [2021-03-11 00:15:13,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:15:13,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:13,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:15:13,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:15:13,750 INFO L87 Difference]: Start difference. First operand 82471 states and 242522 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:14,441 INFO L93 Difference]: Finished difference Result 83095 states and 243943 transitions. [2021-03-11 00:15:14,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:15:14,441 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:15:14,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:14,617 INFO L225 Difference]: With dead ends: 83095 [2021-03-11 00:15:14,617 INFO L226 Difference]: Without dead ends: 82965 [2021-03-11 00:15:14,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 350.9ms TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-03-11 00:15:15,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82965 states. [2021-03-11 00:15:16,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82965 to 79075. [2021-03-11 00:15:16,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79075 states, 79074 states have (on average 2.9409413966664135) internal successors, (232552), 79074 states have internal predecessors, (232552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79075 states to 79075 states and 232552 transitions. [2021-03-11 00:15:16,548 INFO L78 Accepts]: Start accepts. Automaton has 79075 states and 232552 transitions. Word has length 40 [2021-03-11 00:15:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:16,548 INFO L480 AbstractCegarLoop]: Abstraction has 79075 states and 232552 transitions. [2021-03-11 00:15:16,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:16,548 INFO L276 IsEmpty]: Start isEmpty. Operand 79075 states and 232552 transitions. [2021-03-11 00:15:16,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:15:16,666 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:16,666 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:16,866 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-03-11 00:15:16,866 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:16,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:16,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1856068912, now seen corresponding path program 144 times [2021-03-11 00:15:16,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:16,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375633714] [2021-03-11 00:15:16,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:17,023 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:17,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375633714] [2021-03-11 00:15:17,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181069284] [2021-03-11 00:15:17,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:17,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:15:17,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:17,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:15:17,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:17,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:17,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-03-11 00:15:17,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252703313] [2021-03-11 00:15:17,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:15:17,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:17,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:15:17,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:15:17,337 INFO L87 Difference]: Start difference. First operand 79075 states and 232552 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:17,833 INFO L93 Difference]: Finished difference Result 86717 states and 254614 transitions. [2021-03-11 00:15:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:15:17,833 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:15:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:17,983 INFO L225 Difference]: With dead ends: 86717 [2021-03-11 00:15:17,983 INFO L226 Difference]: Without dead ends: 86605 [2021-03-11 00:15:17,983 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 374.6ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:15:18,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86605 states. [2021-03-11 00:15:19,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86605 to 81813. [2021-03-11 00:15:19,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81813 states, 81812 states have (on average 2.9392876350657606) internal successors, (240469), 81812 states have internal predecessors, (240469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:19,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81813 states to 81813 states and 240469 transitions. [2021-03-11 00:15:19,994 INFO L78 Accepts]: Start accepts. Automaton has 81813 states and 240469 transitions. Word has length 40 [2021-03-11 00:15:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:19,994 INFO L480 AbstractCegarLoop]: Abstraction has 81813 states and 240469 transitions. [2021-03-11 00:15:19,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:19,994 INFO L276 IsEmpty]: Start isEmpty. Operand 81813 states and 240469 transitions. [2021-03-11 00:15:20,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:15:20,114 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:20,114 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:20,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-03-11 00:15:20,315 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:20,315 INFO L82 PathProgramCache]: Analyzing trace with hash 870160672, now seen corresponding path program 145 times [2021-03-11 00:15:20,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:20,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520151701] [2021-03-11 00:15:20,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:20,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520151701] [2021-03-11 00:15:20,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910523332] [2021-03-11 00:15:20,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:20,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:20,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:15:20,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:20,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:20,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 21 [2021-03-11 00:15:20,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072096603] [2021-03-11 00:15:20,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:15:20,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:20,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:15:20,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:15:20,740 INFO L87 Difference]: Start difference. First operand 81813 states and 240469 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:21,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:21,348 INFO L93 Difference]: Finished difference Result 87359 states and 256503 transitions. [2021-03-11 00:15:21,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:15:21,349 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:15:21,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:21,508 INFO L225 Difference]: With dead ends: 87359 [2021-03-11 00:15:21,508 INFO L226 Difference]: Without dead ends: 87227 [2021-03-11 00:15:21,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 323.7ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:15:21,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87227 states. [2021-03-11 00:15:23,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87227 to 79203. [2021-03-11 00:15:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79203 states, 79202 states have (on average 2.9397742481250475) internal successors, (232836), 79202 states have internal predecessors, (232836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:23,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79203 states to 79203 states and 232836 transitions. [2021-03-11 00:15:23,444 INFO L78 Accepts]: Start accepts. Automaton has 79203 states and 232836 transitions. Word has length 40 [2021-03-11 00:15:23,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:23,444 INFO L480 AbstractCegarLoop]: Abstraction has 79203 states and 232836 transitions. [2021-03-11 00:15:23,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:23,445 INFO L276 IsEmpty]: Start isEmpty. Operand 79203 states and 232836 transitions. [2021-03-11 00:15:23,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:15:23,554 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:23,554 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:23,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-03-11 00:15:23,755 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:23,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:23,755 INFO L82 PathProgramCache]: Analyzing trace with hash -674180934, now seen corresponding path program 146 times [2021-03-11 00:15:23,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:23,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397597126] [2021-03-11 00:15:23,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:23,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397597126] [2021-03-11 00:15:23,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697117598] [2021-03-11 00:15:23,861 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:23,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:15:23,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:23,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:15:23,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:24,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:24,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 21 [2021-03-11 00:15:24,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627922290] [2021-03-11 00:15:24,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-11 00:15:24,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:24,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-11 00:15:24,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-03-11 00:15:24,152 INFO L87 Difference]: Start difference. First operand 79203 states and 232836 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:24,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:24,725 INFO L93 Difference]: Finished difference Result 81435 states and 239197 transitions. [2021-03-11 00:15:24,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:15:24,726 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:15:24,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:24,865 INFO L225 Difference]: With dead ends: 81435 [2021-03-11 00:15:24,865 INFO L226 Difference]: Without dead ends: 81321 [2021-03-11 00:15:24,865 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:15:24,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81321 states. [2021-03-11 00:15:26,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81321 to 72229. [2021-03-11 00:15:26,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72229 states, 72228 states have (on average 2.9429445644348453) internal successors, (212563), 72228 states have internal predecessors, (212563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72229 states to 72229 states and 212563 transitions. [2021-03-11 00:15:26,708 INFO L78 Accepts]: Start accepts. Automaton has 72229 states and 212563 transitions. Word has length 40 [2021-03-11 00:15:26,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:26,708 INFO L480 AbstractCegarLoop]: Abstraction has 72229 states and 212563 transitions. [2021-03-11 00:15:26,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:26,708 INFO L276 IsEmpty]: Start isEmpty. Operand 72229 states and 212563 transitions. [2021-03-11 00:15:26,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:15:26,813 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:26,813 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:27,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-03-11 00:15:27,013 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:27,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:27,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1896894304, now seen corresponding path program 147 times [2021-03-11 00:15:27,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:27,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752982094] [2021-03-11 00:15:27,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:27,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752982094] [2021-03-11 00:15:27,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762388651] [2021-03-11 00:15:27,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:27,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:15:27,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:27,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:15:27,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:27,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:27,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 20 [2021-03-11 00:15:27,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046333085] [2021-03-11 00:15:27,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:15:27,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:27,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:15:27,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:15:27,387 INFO L87 Difference]: Start difference. First operand 72229 states and 212563 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:27,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:27,923 INFO L93 Difference]: Finished difference Result 78667 states and 231495 transitions. [2021-03-11 00:15:27,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:15:27,924 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:15:27,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:28,067 INFO L225 Difference]: With dead ends: 78667 [2021-03-11 00:15:28,067 INFO L226 Difference]: Without dead ends: 78585 [2021-03-11 00:15:28,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 277.7ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:15:28,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78585 states. [2021-03-11 00:15:29,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78585 to 78067. [2021-03-11 00:15:29,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78067 states, 78066 states have (on average 2.9453539312889094) internal successors, (229932), 78066 states have internal predecessors, (229932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78067 states to 78067 states and 229932 transitions. [2021-03-11 00:15:30,099 INFO L78 Accepts]: Start accepts. Automaton has 78067 states and 229932 transitions. Word has length 40 [2021-03-11 00:15:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:30,099 INFO L480 AbstractCegarLoop]: Abstraction has 78067 states and 229932 transitions. [2021-03-11 00:15:30,099 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:30,099 INFO L276 IsEmpty]: Start isEmpty. Operand 78067 states and 229932 transitions. [2021-03-11 00:15:30,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:15:30,212 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:30,212 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:30,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:30,413 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:30,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:30,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1777811292, now seen corresponding path program 148 times [2021-03-11 00:15:30,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:30,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576623038] [2021-03-11 00:15:30,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:15:30,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576623038] [2021-03-11 00:15:30,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908807655] [2021-03-11 00:15:30,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:30,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:15:30,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:30,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:15:30,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:30,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:30,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 20 [2021-03-11 00:15:30,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980371979] [2021-03-11 00:15:30,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:15:30,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:30,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:15:30,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:15:30,841 INFO L87 Difference]: Start difference. First operand 78067 states and 229932 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:31,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:31,395 INFO L93 Difference]: Finished difference Result 78644 states and 231443 transitions. [2021-03-11 00:15:31,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-11 00:15:31,395 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:15:31,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:31,542 INFO L225 Difference]: With dead ends: 78644 [2021-03-11 00:15:31,542 INFO L226 Difference]: Without dead ends: 78532 [2021-03-11 00:15:31,543 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 318.8ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:15:31,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78532 states. [2021-03-11 00:15:32,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78532 to 76435. [2021-03-11 00:15:32,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76435 states, 76434 states have (on average 2.9432713190464974) internal successors, (224966), 76434 states have internal predecessors, (224966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76435 states to 76435 states and 224966 transitions. [2021-03-11 00:15:33,136 INFO L78 Accepts]: Start accepts. Automaton has 76435 states and 224966 transitions. Word has length 40 [2021-03-11 00:15:33,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:33,137 INFO L480 AbstractCegarLoop]: Abstraction has 76435 states and 224966 transitions. [2021-03-11 00:15:33,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:33,137 INFO L276 IsEmpty]: Start isEmpty. Operand 76435 states and 224966 transitions. [2021-03-11 00:15:33,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:15:33,568 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:33,569 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:33,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-03-11 00:15:33,769 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:33,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:33,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1922098874, now seen corresponding path program 149 times [2021-03-11 00:15:33,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:33,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218365406] [2021-03-11 00:15:33,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:33,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:15:33,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218365406] [2021-03-11 00:15:33,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836982432] [2021-03-11 00:15:33,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:33,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:15:33,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:33,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-03-11 00:15:33,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:34,191 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:34,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:34,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 20 [2021-03-11 00:15:34,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644602748] [2021-03-11 00:15:34,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-11 00:15:34,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:34,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-11 00:15:34,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-03-11 00:15:34,192 INFO L87 Difference]: Start difference. First operand 76435 states and 224966 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:34,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:34,755 INFO L93 Difference]: Finished difference Result 78523 states and 230946 transitions. [2021-03-11 00:15:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:15:34,756 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:15:34,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:34,893 INFO L225 Difference]: With dead ends: 78523 [2021-03-11 00:15:34,893 INFO L226 Difference]: Without dead ends: 78399 [2021-03-11 00:15:34,894 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 306.4ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:15:34,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78399 states. [2021-03-11 00:15:36,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78399 to 77993. [2021-03-11 00:15:36,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77993 states, 77992 states have (on average 2.944750743666017) internal successors, (229667), 77992 states have internal predecessors, (229667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77993 states to 77993 states and 229667 transitions. [2021-03-11 00:15:36,368 INFO L78 Accepts]: Start accepts. Automaton has 77993 states and 229667 transitions. Word has length 40 [2021-03-11 00:15:36,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:36,368 INFO L480 AbstractCegarLoop]: Abstraction has 77993 states and 229667 transitions. [2021-03-11 00:15:36,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:36,368 INFO L276 IsEmpty]: Start isEmpty. Operand 77993 states and 229667 transitions. [2021-03-11 00:15:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:15:36,476 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:36,476 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:36,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-03-11 00:15:36,677 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:36,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:36,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1373433222, now seen corresponding path program 150 times [2021-03-11 00:15:36,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:36,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896968174] [2021-03-11 00:15:36,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:36,936 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-03-11 00:15:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-11 00:15:37,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896968174] [2021-03-11 00:15:37,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909469517] [2021-03-11 00:15:37,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:37,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:15:37,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:37,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:15:37,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:37,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:37,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 22 [2021-03-11 00:15:37,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522506450] [2021-03-11 00:15:37,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:15:37,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:37,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:15:37,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:15:37,368 INFO L87 Difference]: Start difference. First operand 77993 states and 229667 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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) [2021-03-11 00:15:37,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:37,985 INFO L93 Difference]: Finished difference Result 78524 states and 230863 transitions. [2021-03-11 00:15:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-11 00:15:37,986 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:15:37,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:38,123 INFO L225 Difference]: With dead ends: 78524 [2021-03-11 00:15:38,123 INFO L226 Difference]: Without dead ends: 78394 [2021-03-11 00:15:38,123 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 587.7ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:15:38,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78394 states. [2021-03-11 00:15:39,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78394 to 77977. [2021-03-11 00:15:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77977 states, 77976 states have (on average 2.944790704832256) internal successors, (229623), 77976 states have internal predecessors, (229623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:39,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77977 states to 77977 states and 229623 transitions. [2021-03-11 00:15:39,636 INFO L78 Accepts]: Start accepts. Automaton has 77977 states and 229623 transitions. Word has length 40 [2021-03-11 00:15:39,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:39,636 INFO L480 AbstractCegarLoop]: Abstraction has 77977 states and 229623 transitions. [2021-03-11 00:15:39,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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) [2021-03-11 00:15:39,637 INFO L276 IsEmpty]: Start isEmpty. Operand 77977 states and 229623 transitions. [2021-03-11 00:15:39,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-03-11 00:15:39,751 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:39,751 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:39,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-03-11 00:15:39,951 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:39,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:39,951 INFO L82 PathProgramCache]: Analyzing trace with hash 87314106, now seen corresponding path program 151 times [2021-03-11 00:15:39,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:39,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875620786] [2021-03-11 00:15:39,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:40,290 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 12 [2021-03-11 00:15:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:40,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875620786] [2021-03-11 00:15:40,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020440077] [2021-03-11 00:15:40,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:40,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:15:40,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:40,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:40,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-03-11 00:15:40,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749322471] [2021-03-11 00:15:40,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:15:40,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:40,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:15:40,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:15:40,659 INFO L87 Difference]: Start difference. First operand 77977 states and 229623 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:41,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:41,250 INFO L93 Difference]: Finished difference Result 78483 states and 230757 transitions. [2021-03-11 00:15:41,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-11 00:15:41,250 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-03-11 00:15:41,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:41,399 INFO L225 Difference]: With dead ends: 78483 [2021-03-11 00:15:41,400 INFO L226 Difference]: Without dead ends: 78407 [2021-03-11 00:15:41,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 602.0ms TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:15:41,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78407 states. [2021-03-11 00:15:42,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78407 to 71577. [2021-03-11 00:15:42,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71577 states, 71576 states have (on average 2.945861741365821) internal successors, (210853), 71576 states have internal predecessors, (210853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71577 states to 71577 states and 210853 transitions. [2021-03-11 00:15:42,868 INFO L78 Accepts]: Start accepts. Automaton has 71577 states and 210853 transitions. Word has length 40 [2021-03-11 00:15:42,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:42,868 INFO L480 AbstractCegarLoop]: Abstraction has 71577 states and 210853 transitions. [2021-03-11 00:15:42,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:42,868 INFO L276 IsEmpty]: Start isEmpty. Operand 71577 states and 210853 transitions. [2021-03-11 00:15:42,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:15:42,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:42,971 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:43,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:43,171 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:43,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:43,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1013579830, now seen corresponding path program 152 times [2021-03-11 00:15:43,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:43,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932926183] [2021-03-11 00:15:43,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:43,220 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:43,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932926183] [2021-03-11 00:15:43,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133821044] [2021-03-11 00:15:43,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:43,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:15:43,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:43,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:15:43,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:43,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:43,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-11 00:15:43,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149812749] [2021-03-11 00:15:43,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:15:43,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:43,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:15:43,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:15:43,362 INFO L87 Difference]: Start difference. First operand 71577 states and 210853 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:44,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:44,192 INFO L93 Difference]: Finished difference Result 93025 states and 273791 transitions. [2021-03-11 00:15:44,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:15:44,193 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:15:44,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:44,361 INFO L225 Difference]: With dead ends: 93025 [2021-03-11 00:15:44,362 INFO L226 Difference]: Without dead ends: 93025 [2021-03-11 00:15:44,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:15:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93025 states. [2021-03-11 00:15:45,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93025 to 72641. [2021-03-11 00:15:45,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72641 states, 72640 states have (on average 2.9443832599118944) internal successors, (213880), 72640 states have internal predecessors, (213880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:45,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72641 states to 72641 states and 213880 transitions. [2021-03-11 00:15:45,892 INFO L78 Accepts]: Start accepts. Automaton has 72641 states and 213880 transitions. Word has length 43 [2021-03-11 00:15:45,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:45,892 INFO L480 AbstractCegarLoop]: Abstraction has 72641 states and 213880 transitions. [2021-03-11 00:15:45,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:45,892 INFO L276 IsEmpty]: Start isEmpty. Operand 72641 states and 213880 transitions. [2021-03-11 00:15:46,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:15:46,000 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:46,000 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:46,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:46,201 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:46,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:46,201 INFO L82 PathProgramCache]: Analyzing trace with hash -22106132, now seen corresponding path program 153 times [2021-03-11 00:15:46,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:46,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581503674] [2021-03-11 00:15:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:46,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581503674] [2021-03-11 00:15:46,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902657163] [2021-03-11 00:15:46,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:46,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:15:46,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:46,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:15:46,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:46,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:46,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-11 00:15:46,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498276854] [2021-03-11 00:15:46,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:15:46,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:46,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:15:46,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:15:46,384 INFO L87 Difference]: Start difference. First operand 72641 states and 213880 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:47,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:47,285 INFO L93 Difference]: Finished difference Result 111307 states and 324666 transitions. [2021-03-11 00:15:47,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:15:47,286 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:15:47,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:47,504 INFO L225 Difference]: With dead ends: 111307 [2021-03-11 00:15:47,504 INFO L226 Difference]: Without dead ends: 111220 [2021-03-11 00:15:47,504 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:15:47,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111220 states. [2021-03-11 00:15:48,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111220 to 72641. [2021-03-11 00:15:49,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72641 states, 72640 states have (on average 2.9442318281938324) internal successors, (213869), 72640 states have internal predecessors, (213869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:49,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72641 states to 72641 states and 213869 transitions. [2021-03-11 00:15:49,189 INFO L78 Accepts]: Start accepts. Automaton has 72641 states and 213869 transitions. Word has length 43 [2021-03-11 00:15:49,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:49,189 INFO L480 AbstractCegarLoop]: Abstraction has 72641 states and 213869 transitions. [2021-03-11 00:15:49,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:49,189 INFO L276 IsEmpty]: Start isEmpty. Operand 72641 states and 213869 transitions. [2021-03-11 00:15:49,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:15:49,300 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:49,300 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:49,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:49,500 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:49,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:49,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1136369384, now seen corresponding path program 154 times [2021-03-11 00:15:49,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:49,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251820368] [2021-03-11 00:15:49,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:49,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251820368] [2021-03-11 00:15:49,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440079000] [2021-03-11 00:15:49,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:49,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:15:49,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:49,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:15:49,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:49,743 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:49,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:49,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:15:49,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670779238] [2021-03-11 00:15:49,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:15:49,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:49,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:15:49,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:15:49,744 INFO L87 Difference]: Start difference. First operand 72641 states and 213869 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:51,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:51,466 INFO L93 Difference]: Finished difference Result 126511 states and 368306 transitions. [2021-03-11 00:15:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-11 00:15:51,467 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:15:51,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:51,743 INFO L225 Difference]: With dead ends: 126511 [2021-03-11 00:15:51,743 INFO L226 Difference]: Without dead ends: 126481 [2021-03-11 00:15:51,743 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 737.4ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-03-11 00:15:51,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126481 states. [2021-03-11 00:15:53,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126481 to 87008. [2021-03-11 00:15:53,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87008 states, 87007 states have (on average 2.953808314273564) internal successors, (257002), 87007 states have internal predecessors, (257002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:54,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87008 states to 87008 states and 257002 transitions. [2021-03-11 00:15:54,053 INFO L78 Accepts]: Start accepts. Automaton has 87008 states and 257002 transitions. Word has length 43 [2021-03-11 00:15:54,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:54,053 INFO L480 AbstractCegarLoop]: Abstraction has 87008 states and 257002 transitions. [2021-03-11 00:15:54,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:54,053 INFO L276 IsEmpty]: Start isEmpty. Operand 87008 states and 257002 transitions. [2021-03-11 00:15:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:15:54,163 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:54,163 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:54,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable253 [2021-03-11 00:15:54,364 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:54,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:54,364 INFO L82 PathProgramCache]: Analyzing trace with hash 925672338, now seen corresponding path program 155 times [2021-03-11 00:15:54,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:54,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763940532] [2021-03-11 00:15:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:54,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763940532] [2021-03-11 00:15:54,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137866492] [2021-03-11 00:15:54,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:54,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-11 00:15:54,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:54,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:15:54,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:54,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:54,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:15:54,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511269762] [2021-03-11 00:15:54,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:15:54,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:54,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:15:54,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:15:54,555 INFO L87 Difference]: Start difference. First operand 87008 states and 257002 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:55,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:15:55,960 INFO L93 Difference]: Finished difference Result 102246 states and 299982 transitions. [2021-03-11 00:15:55,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-11 00:15:55,961 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:15:55,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:15:56,232 INFO L225 Difference]: With dead ends: 102246 [2021-03-11 00:15:56,232 INFO L226 Difference]: Without dead ends: 102234 [2021-03-11 00:15:56,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 429.1ms TimeCoverageRelationStatistics Valid=876, Invalid=1674, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:15:56,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102234 states. [2021-03-11 00:15:57,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102234 to 90132. [2021-03-11 00:15:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90132 states, 90131 states have (on average 2.958493747989038) internal successors, (266652), 90131 states have internal predecessors, (266652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:58,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90132 states to 90132 states and 266652 transitions. [2021-03-11 00:15:58,133 INFO L78 Accepts]: Start accepts. Automaton has 90132 states and 266652 transitions. Word has length 43 [2021-03-11 00:15:58,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:15:58,134 INFO L480 AbstractCegarLoop]: Abstraction has 90132 states and 266652 transitions. [2021-03-11 00:15:58,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:15:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 90132 states and 266652 transitions. [2021-03-11 00:15:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:15:58,260 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:15:58,260 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:15:58,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-03-11 00:15:58,461 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:15:58,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:15:58,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1654424156, now seen corresponding path program 156 times [2021-03-11 00:15:58,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:15:58,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299991079] [2021-03-11 00:15:58,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:15:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:15:58,510 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:58,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299991079] [2021-03-11 00:15:58,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158470328] [2021-03-11 00:15:58,510 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:15:58,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:15:58,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:15:58,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:15:58,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:15:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:15:58,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:15:58,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:15:58,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188492969] [2021-03-11 00:15:58,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:15:58,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:15:58,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:15:58,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:15:58,651 INFO L87 Difference]: Start difference. First operand 90132 states and 266652 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:00,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:00,209 INFO L93 Difference]: Finished difference Result 104209 states and 304992 transitions. [2021-03-11 00:16:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-11 00:16:00,210 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:16:00,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:00,426 INFO L225 Difference]: With dead ends: 104209 [2021-03-11 00:16:00,426 INFO L226 Difference]: Without dead ends: 104209 [2021-03-11 00:16:00,427 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 596.3ms TimeCoverageRelationStatistics Valid=1199, Invalid=2341, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:16:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104209 states. [2021-03-11 00:16:02,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104209 to 82806. [2021-03-11 00:16:02,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82806 states, 82805 states have (on average 2.950872531851941) internal successors, (244347), 82805 states have internal predecessors, (244347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:02,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82806 states to 82806 states and 244347 transitions. [2021-03-11 00:16:02,634 INFO L78 Accepts]: Start accepts. Automaton has 82806 states and 244347 transitions. Word has length 43 [2021-03-11 00:16:02,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:02,634 INFO L480 AbstractCegarLoop]: Abstraction has 82806 states and 244347 transitions. [2021-03-11 00:16:02,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:02,634 INFO L276 IsEmpty]: Start isEmpty. Operand 82806 states and 244347 transitions. [2021-03-11 00:16:02,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:16:02,749 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:02,749 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:16:02,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-03-11 00:16:02,951 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:02,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:02,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1277453002, now seen corresponding path program 157 times [2021-03-11 00:16:02,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:02,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952004875] [2021-03-11 00:16:02,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:03,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952004875] [2021-03-11 00:16:03,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905566900] [2021-03-11 00:16:03,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:03,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:16:03,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:03,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:03,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:16:03,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541282656] [2021-03-11 00:16:03,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:16:03,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:03,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:16:03,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:16:03,152 INFO L87 Difference]: Start difference. First operand 82806 states and 244347 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:04,131 INFO L93 Difference]: Finished difference Result 121068 states and 352472 transitions. [2021-03-11 00:16:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-11 00:16:04,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:16:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:05,046 INFO L225 Difference]: With dead ends: 121068 [2021-03-11 00:16:05,047 INFO L226 Difference]: Without dead ends: 121054 [2021-03-11 00:16:05,047 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:16:05,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121054 states. [2021-03-11 00:16:06,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121054 to 76188. [2021-03-11 00:16:06,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76188 states, 76187 states have (on average 2.9398978828409046) internal successors, (223982), 76187 states have internal predecessors, (223982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:07,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76188 states to 76188 states and 223982 transitions. [2021-03-11 00:16:07,046 INFO L78 Accepts]: Start accepts. Automaton has 76188 states and 223982 transitions. Word has length 43 [2021-03-11 00:16:07,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:07,047 INFO L480 AbstractCegarLoop]: Abstraction has 76188 states and 223982 transitions. [2021-03-11 00:16:07,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:07,047 INFO L276 IsEmpty]: Start isEmpty. Operand 76188 states and 223982 transitions. [2021-03-11 00:16:07,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:16:07,152 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:07,152 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:16:07,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-03-11 00:16:07,353 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:07,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:07,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1361851776, now seen corresponding path program 158 times [2021-03-11 00:16:07,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:07,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149541455] [2021-03-11 00:16:07,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:07,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:07,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149541455] [2021-03-11 00:16:07,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157932820] [2021-03-11 00:16:07,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:07,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:16:07,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:07,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:16:07,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:07,581 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:07,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:07,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:16:07,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085645955] [2021-03-11 00:16:07,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:16:07,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:07,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:16:07,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:16:07,582 INFO L87 Difference]: Start difference. First operand 76188 states and 223982 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:08,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:08,936 INFO L93 Difference]: Finished difference Result 117078 states and 340699 transitions. [2021-03-11 00:16:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:16:08,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:16:08,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:09,225 INFO L225 Difference]: With dead ends: 117078 [2021-03-11 00:16:09,225 INFO L226 Difference]: Without dead ends: 117022 [2021-03-11 00:16:09,225 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 404.0ms TimeCoverageRelationStatistics Valid=502, Invalid=1568, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:16:09,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117022 states. [2021-03-11 00:16:10,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117022 to 77346. [2021-03-11 00:16:10,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77346 states, 77345 states have (on average 2.9375783825715946) internal successors, (227207), 77345 states have internal predecessors, (227207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:11,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77346 states to 77346 states and 227207 transitions. [2021-03-11 00:16:11,153 INFO L78 Accepts]: Start accepts. Automaton has 77346 states and 227207 transitions. Word has length 43 [2021-03-11 00:16:11,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:11,153 INFO L480 AbstractCegarLoop]: Abstraction has 77346 states and 227207 transitions. [2021-03-11 00:16:11,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:11,153 INFO L276 IsEmpty]: Start isEmpty. Operand 77346 states and 227207 transitions. [2021-03-11 00:16:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:16:11,261 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:11,261 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:16:11,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-03-11 00:16:11,462 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:11,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:11,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1293078010, now seen corresponding path program 159 times [2021-03-11 00:16:11,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:11,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892500820] [2021-03-11 00:16:11,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:11,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892500820] [2021-03-11 00:16:11,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643559452] [2021-03-11 00:16:11,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:11,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-11 00:16:11,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:11,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:16:11,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:11,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:11,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:16:11,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741923707] [2021-03-11 00:16:11,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:16:11,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:11,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:16:11,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:16:11,650 INFO L87 Difference]: Start difference. First operand 77346 states and 227207 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:12,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:12,888 INFO L93 Difference]: Finished difference Result 119416 states and 347327 transitions. [2021-03-11 00:16:12,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:16:12,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:16:12,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:13,118 INFO L225 Difference]: With dead ends: 119416 [2021-03-11 00:16:13,118 INFO L226 Difference]: Without dead ends: 119318 [2021-03-11 00:16:13,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 718.4ms TimeCoverageRelationStatistics Valid=452, Invalid=1440, Unknown=0, NotChecked=0, Total=1892 [2021-03-11 00:16:13,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119318 states. [2021-03-11 00:16:14,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119318 to 78282. [2021-03-11 00:16:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78282 states, 78281 states have (on average 2.9364852263001238) internal successors, (229871), 78281 states have internal predecessors, (229871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78282 states to 78282 states and 229871 transitions. [2021-03-11 00:16:15,368 INFO L78 Accepts]: Start accepts. Automaton has 78282 states and 229871 transitions. Word has length 43 [2021-03-11 00:16:15,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:15,368 INFO L480 AbstractCegarLoop]: Abstraction has 78282 states and 229871 transitions. [2021-03-11 00:16:15,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:15,368 INFO L276 IsEmpty]: Start isEmpty. Operand 78282 states and 229871 transitions. [2021-03-11 00:16:15,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:16:15,473 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:15,473 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:16:15,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2021-03-11 00:16:15,673 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:15,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:15,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1811390400, now seen corresponding path program 160 times [2021-03-11 00:16:15,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:15,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125745246] [2021-03-11 00:16:15,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:15,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125745246] [2021-03-11 00:16:15,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938767549] [2021-03-11 00:16:15,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:15,742 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:16:15,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:15,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:16:15,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:15,862 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:15,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:15,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:16:15,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175779247] [2021-03-11 00:16:15,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:16:15,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:15,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:16:15,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:16:15,863 INFO L87 Difference]: Start difference. First operand 78282 states and 229871 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:16,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:16,595 INFO L93 Difference]: Finished difference Result 113086 states and 328906 transitions. [2021-03-11 00:16:16,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:16:16,596 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:16:16,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:16,811 INFO L225 Difference]: With dead ends: 113086 [2021-03-11 00:16:16,812 INFO L226 Difference]: Without dead ends: 113016 [2021-03-11 00:16:16,812 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=316, Invalid=944, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:16:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113016 states. [2021-03-11 00:16:18,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113016 to 78282. [2021-03-11 00:16:18,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78282 states, 78281 states have (on average 2.935437717964768) internal successors, (229789), 78281 states have internal predecessors, (229789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78282 states to 78282 states and 229789 transitions. [2021-03-11 00:16:18,859 INFO L78 Accepts]: Start accepts. Automaton has 78282 states and 229789 transitions. Word has length 43 [2021-03-11 00:16:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:18,859 INFO L480 AbstractCegarLoop]: Abstraction has 78282 states and 229789 transitions. [2021-03-11 00:16:18,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 78282 states and 229789 transitions. [2021-03-11 00:16:18,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:16:18,960 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:18,960 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:16:19,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2021-03-11 00:16:19,161 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:19,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:19,161 INFO L82 PathProgramCache]: Analyzing trace with hash -939318, now seen corresponding path program 161 times [2021-03-11 00:16:19,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:19,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967440187] [2021-03-11 00:16:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:19,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:19,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967440187] [2021-03-11 00:16:19,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108180392] [2021-03-11 00:16:19,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:19,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-11 00:16:19,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:19,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:16:19,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:19,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:19,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:16:19,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244605122] [2021-03-11 00:16:19,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:16:19,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:19,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:16:19,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:16:19,364 INFO L87 Difference]: Start difference. First operand 78282 states and 229789 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:20,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:20,332 INFO L93 Difference]: Finished difference Result 93588 states and 273166 transitions. [2021-03-11 00:16:20,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-11 00:16:20,333 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:16:20,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:20,964 INFO L225 Difference]: With dead ends: 93588 [2021-03-11 00:16:20,964 INFO L226 Difference]: Without dead ends: 93528 [2021-03-11 00:16:20,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 505.1ms TimeCoverageRelationStatistics Valid=973, Invalid=2107, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:16:21,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93528 states. [2021-03-11 00:16:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93528 to 81258. [2021-03-11 00:16:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81258 states, 81257 states have (on average 2.9344056512054344) internal successors, (238441), 81257 states have internal predecessors, (238441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81258 states to 81258 states and 238441 transitions. [2021-03-11 00:16:22,856 INFO L78 Accepts]: Start accepts. Automaton has 81258 states and 238441 transitions. Word has length 43 [2021-03-11 00:16:22,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:22,856 INFO L480 AbstractCegarLoop]: Abstraction has 81258 states and 238441 transitions. [2021-03-11 00:16:22,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:22,856 INFO L276 IsEmpty]: Start isEmpty. Operand 81258 states and 238441 transitions. [2021-03-11 00:16:22,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:16:22,971 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:22,971 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:16:23,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:23,172 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:23,172 INFO L82 PathProgramCache]: Analyzing trace with hash 415720322, now seen corresponding path program 162 times [2021-03-11 00:16:23,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:23,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861359570] [2021-03-11 00:16:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:23,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:23,213 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:23,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861359570] [2021-03-11 00:16:23,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256803224] [2021-03-11 00:16:23,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:23,235 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:16:23,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:23,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:16:23,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:23,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:23,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-03-11 00:16:23,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414814200] [2021-03-11 00:16:23,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:16:23,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:23,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:16:23,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:16:23,357 INFO L87 Difference]: Start difference. First operand 81258 states and 238441 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:24,331 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-03-11 00:16:24,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:24,878 INFO L93 Difference]: Finished difference Result 96814 states and 281237 transitions. [2021-03-11 00:16:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-11 00:16:24,878 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:16:24,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:25,061 INFO L225 Difference]: With dead ends: 96814 [2021-03-11 00:16:25,062 INFO L226 Difference]: Without dead ends: 96786 [2021-03-11 00:16:25,062 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 918.3ms TimeCoverageRelationStatistics Valid=1190, Invalid=2350, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:16:25,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96786 states. [2021-03-11 00:16:26,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96786 to 75788. [2021-03-11 00:16:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75788 states, 75787 states have (on average 2.9350680195811947) internal successors, (222440), 75787 states have internal predecessors, (222440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:26,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75788 states to 75788 states and 222440 transitions. [2021-03-11 00:16:26,876 INFO L78 Accepts]: Start accepts. Automaton has 75788 states and 222440 transitions. Word has length 43 [2021-03-11 00:16:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:26,876 INFO L480 AbstractCegarLoop]: Abstraction has 75788 states and 222440 transitions. [2021-03-11 00:16:26,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:26,876 INFO L276 IsEmpty]: Start isEmpty. Operand 75788 states and 222440 transitions. [2021-03-11 00:16:27,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:16:27,352 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:27,352 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:16:27,553 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:27,553 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:27,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:27,553 INFO L82 PathProgramCache]: Analyzing trace with hash -976949870, now seen corresponding path program 163 times [2021-03-11 00:16:27,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:27,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658521499] [2021-03-11 00:16:27,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:27,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658521499] [2021-03-11 00:16:27,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789666327] [2021-03-11 00:16:27,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:27,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:16:27,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:27,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:27,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:16:27,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675114996] [2021-03-11 00:16:27,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:16:27,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:27,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:16:27,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:16:27,762 INFO L87 Difference]: Start difference. First operand 75788 states and 222440 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:28,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:28,741 INFO L93 Difference]: Finished difference Result 95697 states and 278219 transitions. [2021-03-11 00:16:28,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-11 00:16:28,742 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:16:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:28,916 INFO L225 Difference]: With dead ends: 95697 [2021-03-11 00:16:28,916 INFO L226 Difference]: Without dead ends: 95559 [2021-03-11 00:16:28,917 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 566.0ms TimeCoverageRelationStatistics Valid=996, Invalid=2426, Unknown=0, NotChecked=0, Total=3422 [2021-03-11 00:16:29,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95559 states. [2021-03-11 00:16:30,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95559 to 79124. [2021-03-11 00:16:30,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79124 states, 79123 states have (on average 2.930753383971791) internal successors, (231890), 79123 states have internal predecessors, (231890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:30,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79124 states to 79124 states and 231890 transitions. [2021-03-11 00:16:30,964 INFO L78 Accepts]: Start accepts. Automaton has 79124 states and 231890 transitions. Word has length 43 [2021-03-11 00:16:30,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:30,964 INFO L480 AbstractCegarLoop]: Abstraction has 79124 states and 231890 transitions. [2021-03-11 00:16:30,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:30,964 INFO L276 IsEmpty]: Start isEmpty. Operand 79124 states and 231890 transitions. [2021-03-11 00:16:31,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:16:31,082 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:31,082 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:16:31,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:31,282 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:31,283 INFO L82 PathProgramCache]: Analyzing trace with hash -725487968, now seen corresponding path program 164 times [2021-03-11 00:16:31,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:31,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774181708] [2021-03-11 00:16:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:31,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774181708] [2021-03-11 00:16:31,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019189671] [2021-03-11 00:16:31,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:31,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:16:31,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:31,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:16:31,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:31,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:31,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-03-11 00:16:31,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732628874] [2021-03-11 00:16:31,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:16:31,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:31,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:16:31,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:16:31,475 INFO L87 Difference]: Start difference. First operand 79124 states and 231890 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:33,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:33,131 INFO L93 Difference]: Finished difference Result 103605 states and 300307 transitions. [2021-03-11 00:16:33,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-11 00:16:33,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:16:33,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:33,403 INFO L225 Difference]: With dead ends: 103605 [2021-03-11 00:16:33,404 INFO L226 Difference]: Without dead ends: 103570 [2021-03-11 00:16:33,404 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 697.7ms TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2021-03-11 00:16:33,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103570 states. [2021-03-11 00:16:35,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103570 to 84672. [2021-03-11 00:16:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84672 states, 84671 states have (on average 2.9324089711943877) internal successors, (248290), 84671 states have internal predecessors, (248290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:35,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84672 states to 84672 states and 248290 transitions. [2021-03-11 00:16:35,316 INFO L78 Accepts]: Start accepts. Automaton has 84672 states and 248290 transitions. Word has length 43 [2021-03-11 00:16:35,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:35,316 INFO L480 AbstractCegarLoop]: Abstraction has 84672 states and 248290 transitions. [2021-03-11 00:16:35,316 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:35,316 INFO L276 IsEmpty]: Start isEmpty. Operand 84672 states and 248290 transitions. [2021-03-11 00:16:35,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:16:35,436 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:35,436 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:16:35,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:35,636 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:35,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:35,637 INFO L82 PathProgramCache]: Analyzing trace with hash -378710582, now seen corresponding path program 165 times [2021-03-11 00:16:35,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:35,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169040737] [2021-03-11 00:16:35,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:35,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169040737] [2021-03-11 00:16:35,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679732237] [2021-03-11 00:16:35,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:35,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-11 00:16:35,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:35,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:16:35,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:35,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:35,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:16:35,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358359151] [2021-03-11 00:16:35,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:16:35,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:35,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:16:35,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:16:35,873 INFO L87 Difference]: Start difference. First operand 84672 states and 248290 transitions. Second operand has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:37,375 INFO L93 Difference]: Finished difference Result 103499 states and 300302 transitions. [2021-03-11 00:16:37,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-11 00:16:37,376 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:16:37,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:37,569 INFO L225 Difference]: With dead ends: 103499 [2021-03-11 00:16:37,569 INFO L226 Difference]: Without dead ends: 103307 [2021-03-11 00:16:37,569 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 1024.4ms TimeCoverageRelationStatistics Valid=1034, Invalid=2748, Unknown=0, NotChecked=0, Total=3782 [2021-03-11 00:16:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103307 states. [2021-03-11 00:16:39,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103307 to 88452. [2021-03-11 00:16:39,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88452 states, 88451 states have (on average 2.92898893172491) internal successors, (259072), 88451 states have internal predecessors, (259072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:39,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88452 states to 88452 states and 259072 transitions. [2021-03-11 00:16:39,932 INFO L78 Accepts]: Start accepts. Automaton has 88452 states and 259072 transitions. Word has length 43 [2021-03-11 00:16:39,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:39,933 INFO L480 AbstractCegarLoop]: Abstraction has 88452 states and 259072 transitions. [2021-03-11 00:16:39,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3684210526315788) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:39,933 INFO L276 IsEmpty]: Start isEmpty. Operand 88452 states and 259072 transitions. [2021-03-11 00:16:40,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:16:40,061 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:40,061 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:16:40,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:40,262 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:40,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:40,262 INFO L82 PathProgramCache]: Analyzing trace with hash 499459778, now seen corresponding path program 166 times [2021-03-11 00:16:40,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:40,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349122428] [2021-03-11 00:16:40,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:40,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349122428] [2021-03-11 00:16:40,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283034835] [2021-03-11 00:16:40,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:40,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:16:40,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:40,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:16:40,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:40,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:40,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-03-11 00:16:40,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829667723] [2021-03-11 00:16:40,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:16:40,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:40,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:16:40,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:16:40,454 INFO L87 Difference]: Start difference. First operand 88452 states and 259072 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:42,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:42,183 INFO L93 Difference]: Finished difference Result 121966 states and 353871 transitions. [2021-03-11 00:16:42,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-11 00:16:42,184 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:16:42,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:42,426 INFO L225 Difference]: With dead ends: 121966 [2021-03-11 00:16:42,426 INFO L226 Difference]: Without dead ends: 121938 [2021-03-11 00:16:42,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1607 ImplicationChecksByTransitivity, 680.1ms TimeCoverageRelationStatistics Valid=1414, Invalid=2876, Unknown=0, NotChecked=0, Total=4290 [2021-03-11 00:16:42,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121938 states. [2021-03-11 00:16:44,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121938 to 103002. [2021-03-11 00:16:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103002 states, 103001 states have (on average 2.9221755128590985) internal successors, (300987), 103001 states have internal predecessors, (300987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:45,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103002 states to 103002 states and 300987 transitions. [2021-03-11 00:16:45,131 INFO L78 Accepts]: Start accepts. Automaton has 103002 states and 300987 transitions. Word has length 43 [2021-03-11 00:16:45,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:45,132 INFO L480 AbstractCegarLoop]: Abstraction has 103002 states and 300987 transitions. [2021-03-11 00:16:45,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:45,132 INFO L276 IsEmpty]: Start isEmpty. Operand 103002 states and 300987 transitions. [2021-03-11 00:16:45,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:16:45,268 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:45,268 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:16:45,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-03-11 00:16:45,468 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:45,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:45,469 INFO L82 PathProgramCache]: Analyzing trace with hash 223084418, now seen corresponding path program 167 times [2021-03-11 00:16:45,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:45,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740401485] [2021-03-11 00:16:45,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:45,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:45,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740401485] [2021-03-11 00:16:45,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336498897] [2021-03-11 00:16:45,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:45,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:16:45,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:45,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:16:45,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:45,645 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:45,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:45,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-11 00:16:45,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811809746] [2021-03-11 00:16:45,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:16:45,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:45,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:16:45,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:16:45,646 INFO L87 Difference]: Start difference. First operand 103002 states and 300987 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:46,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:46,283 INFO L93 Difference]: Finished difference Result 115037 states and 335174 transitions. [2021-03-11 00:16:46,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:16:46,284 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:16:46,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:46,525 INFO L225 Difference]: With dead ends: 115037 [2021-03-11 00:16:46,525 INFO L226 Difference]: Without dead ends: 115037 [2021-03-11 00:16:46,526 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 157.3ms TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:16:47,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115037 states. [2021-03-11 00:16:48,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115037 to 103880. [2021-03-11 00:16:48,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103880 states, 103879 states have (on average 2.9223808469469286) internal successors, (303574), 103879 states have internal predecessors, (303574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:49,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103880 states to 103880 states and 303574 transitions. [2021-03-11 00:16:49,224 INFO L78 Accepts]: Start accepts. Automaton has 103880 states and 303574 transitions. Word has length 43 [2021-03-11 00:16:49,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:49,224 INFO L480 AbstractCegarLoop]: Abstraction has 103880 states and 303574 transitions. [2021-03-11 00:16:49,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 103880 states and 303574 transitions. [2021-03-11 00:16:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:16:49,359 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:49,360 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:16:49,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:49,560 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:49,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:49,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1001606290, now seen corresponding path program 168 times [2021-03-11 00:16:49,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:49,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629905845] [2021-03-11 00:16:49,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:49,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:49,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629905845] [2021-03-11 00:16:49,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753749679] [2021-03-11 00:16:49,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:49,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:16:49,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:49,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:16:49,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:49,763 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:49,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:49,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-11 00:16:49,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838749316] [2021-03-11 00:16:49,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-11 00:16:49,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:49,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-11 00:16:49,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-03-11 00:16:49,764 INFO L87 Difference]: Start difference. First operand 103880 states and 303574 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:50,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:50,800 INFO L93 Difference]: Finished difference Result 123538 states and 357951 transitions. [2021-03-11 00:16:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:16:50,801 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:16:50,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:51,059 INFO L225 Difference]: With dead ends: 123538 [2021-03-11 00:16:51,060 INFO L226 Difference]: Without dead ends: 123466 [2021-03-11 00:16:51,060 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 572.0ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:16:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123466 states. [2021-03-11 00:16:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123466 to 103880. [2021-03-11 00:16:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103880 states, 103879 states have (on average 2.9222845810991633) internal successors, (303564), 103879 states have internal predecessors, (303564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:53,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103880 states to 103880 states and 303564 transitions. [2021-03-11 00:16:53,811 INFO L78 Accepts]: Start accepts. Automaton has 103880 states and 303564 transitions. Word has length 43 [2021-03-11 00:16:53,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:53,811 INFO L480 AbstractCegarLoop]: Abstraction has 103880 states and 303564 transitions. [2021-03-11 00:16:53,811 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:53,811 INFO L276 IsEmpty]: Start isEmpty. Operand 103880 states and 303564 transitions. [2021-03-11 00:16:53,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:16:53,954 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:53,954 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:16:54,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-03-11 00:16:54,154 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:54,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:54,155 INFO L82 PathProgramCache]: Analyzing trace with hash 5413476, now seen corresponding path program 169 times [2021-03-11 00:16:54,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:54,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700838678] [2021-03-11 00:16:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:54,208 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:54,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700838678] [2021-03-11 00:16:54,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846944877] [2021-03-11 00:16:54,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:54,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:16:54,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:54,363 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:54,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:54,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:16:54,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323721332] [2021-03-11 00:16:54,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:16:54,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:54,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:16:54,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:16:54,364 INFO L87 Difference]: Start difference. First operand 103880 states and 303564 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:55,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:55,610 INFO L93 Difference]: Finished difference Result 113177 states and 328961 transitions. [2021-03-11 00:16:55,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-11 00:16:55,611 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:16:55,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:16:55,939 INFO L225 Difference]: With dead ends: 113177 [2021-03-11 00:16:55,939 INFO L226 Difference]: Without dead ends: 113177 [2021-03-11 00:16:55,939 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-03-11 00:16:56,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113177 states. [2021-03-11 00:16:57,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113177 to 104664. [2021-03-11 00:16:57,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104664 states, 104663 states have (on average 2.9217775144989155) internal successors, (305802), 104663 states have internal predecessors, (305802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:58,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104664 states to 104664 states and 305802 transitions. [2021-03-11 00:16:58,066 INFO L78 Accepts]: Start accepts. Automaton has 104664 states and 305802 transitions. Word has length 43 [2021-03-11 00:16:58,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:16:58,066 INFO L480 AbstractCegarLoop]: Abstraction has 104664 states and 305802 transitions. [2021-03-11 00:16:58,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:58,066 INFO L276 IsEmpty]: Start isEmpty. Operand 104664 states and 305802 transitions. [2021-03-11 00:16:58,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:16:58,214 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:16:58,214 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:16:58,415 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-03-11 00:16:58,415 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:16:58,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:16:58,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1165282054, now seen corresponding path program 170 times [2021-03-11 00:16:58,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:16:58,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206952907] [2021-03-11 00:16:58,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:16:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:16:58,464 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:58,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206952907] [2021-03-11 00:16:58,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591459916] [2021-03-11 00:16:58,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:16:58,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:16:58,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:16:58,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:16:58,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:16:59,121 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:16:59,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:16:59,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:16:59,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570414303] [2021-03-11 00:16:59,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:16:59,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:16:59,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:16:59,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:16:59,122 INFO L87 Difference]: Start difference. First operand 104664 states and 305802 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:16:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:16:59,926 INFO L93 Difference]: Finished difference Result 125118 states and 361907 transitions. [2021-03-11 00:16:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:16:59,927 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:16:59,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:00,194 INFO L225 Difference]: With dead ends: 125118 [2021-03-11 00:17:00,194 INFO L226 Difference]: Without dead ends: 125058 [2021-03-11 00:17:00,194 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 364.1ms TimeCoverageRelationStatistics Valid=373, Invalid=1109, Unknown=0, NotChecked=0, Total=1482 [2021-03-11 00:17:00,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125058 states. [2021-03-11 00:17:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125058 to 107834. [2021-03-11 00:17:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107834 states, 107833 states have (on average 2.9243645266291396) internal successors, (315343), 107833 states have internal predecessors, (315343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:03,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107834 states to 107834 states and 315343 transitions. [2021-03-11 00:17:03,070 INFO L78 Accepts]: Start accepts. Automaton has 107834 states and 315343 transitions. Word has length 43 [2021-03-11 00:17:03,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:03,070 INFO L480 AbstractCegarLoop]: Abstraction has 107834 states and 315343 transitions. [2021-03-11 00:17:03,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:03,071 INFO L276 IsEmpty]: Start isEmpty. Operand 107834 states and 315343 transitions. [2021-03-11 00:17:03,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:17:03,250 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:03,250 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:03,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-03-11 00:17:03,450 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:03,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:03,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1534575938, now seen corresponding path program 171 times [2021-03-11 00:17:03,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:03,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837608205] [2021-03-11 00:17:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:03,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837608205] [2021-03-11 00:17:03,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622536248] [2021-03-11 00:17:03,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:03,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:17:03,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:03,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:17:03,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:03,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:03,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:17:03,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126934033] [2021-03-11 00:17:03,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:17:03,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:03,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:17:03,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:17:03,638 INFO L87 Difference]: Start difference. First operand 107834 states and 315343 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:05,324 INFO L93 Difference]: Finished difference Result 122629 states and 356121 transitions. [2021-03-11 00:17:05,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-11 00:17:05,325 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:17:05,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:05,578 INFO L225 Difference]: With dead ends: 122629 [2021-03-11 00:17:05,578 INFO L226 Difference]: Without dead ends: 122629 [2021-03-11 00:17:05,578 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 1005.8ms TimeCoverageRelationStatistics Valid=814, Invalid=1838, Unknown=0, NotChecked=0, Total=2652 [2021-03-11 00:17:05,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122629 states. [2021-03-11 00:17:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122629 to 110778. [2021-03-11 00:17:08,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110778 states, 110777 states have (on average 2.9219513075818986) internal successors, (323685), 110777 states have internal predecessors, (323685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:08,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110778 states to 110778 states and 323685 transitions. [2021-03-11 00:17:08,308 INFO L78 Accepts]: Start accepts. Automaton has 110778 states and 323685 transitions. Word has length 43 [2021-03-11 00:17:08,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:08,308 INFO L480 AbstractCegarLoop]: Abstraction has 110778 states and 323685 transitions. [2021-03-11 00:17:08,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:08,308 INFO L276 IsEmpty]: Start isEmpty. Operand 110778 states and 323685 transitions. [2021-03-11 00:17:08,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:17:08,473 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:08,473 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:08,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2021-03-11 00:17:08,673 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:08,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:08,674 INFO L82 PathProgramCache]: Analyzing trace with hash -268885396, now seen corresponding path program 172 times [2021-03-11 00:17:08,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:08,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448943677] [2021-03-11 00:17:08,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:08,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448943677] [2021-03-11 00:17:08,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190162124] [2021-03-11 00:17:08,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:08,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:17:08,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:08,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:17:08,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:08,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:08,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:17:08,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096649496] [2021-03-11 00:17:08,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:17:08,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:08,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:17:08,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:17:08,867 INFO L87 Difference]: Start difference. First operand 110778 states and 323685 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:10,509 INFO L93 Difference]: Finished difference Result 147552 states and 427956 transitions. [2021-03-11 00:17:10,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-11 00:17:10,510 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:17:10,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:10,854 INFO L225 Difference]: With dead ends: 147552 [2021-03-11 00:17:10,854 INFO L226 Difference]: Without dead ends: 147468 [2021-03-11 00:17:10,854 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=497, Invalid=1573, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:17:11,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147468 states. [2021-03-11 00:17:13,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147468 to 124054. [2021-03-11 00:17:13,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124054 states, 124053 states have (on average 2.916713017823027) internal successors, (361827), 124053 states have internal predecessors, (361827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:13,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124054 states to 124054 states and 361827 transitions. [2021-03-11 00:17:13,910 INFO L78 Accepts]: Start accepts. Automaton has 124054 states and 361827 transitions. Word has length 43 [2021-03-11 00:17:13,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:13,910 INFO L480 AbstractCegarLoop]: Abstraction has 124054 states and 361827 transitions. [2021-03-11 00:17:13,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:13,910 INFO L276 IsEmpty]: Start isEmpty. Operand 124054 states and 361827 transitions. [2021-03-11 00:17:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:17:14,112 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:14,112 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:14,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:14,313 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:14,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:14,313 INFO L82 PathProgramCache]: Analyzing trace with hash -471353564, now seen corresponding path program 173 times [2021-03-11 00:17:14,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:14,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006745821] [2021-03-11 00:17:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:14,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006745821] [2021-03-11 00:17:14,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245765434] [2021-03-11 00:17:14,363 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:14,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:17:14,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:14,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:17:14,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:14,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:14,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:17:14,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555414058] [2021-03-11 00:17:14,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:17:14,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:14,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:17:14,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:17:14,505 INFO L87 Difference]: Start difference. First operand 124054 states and 361827 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:15,450 WARN L205 SmtUtils]: Spent 552.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-03-11 00:17:16,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:16,533 INFO L93 Difference]: Finished difference Result 146821 states and 425207 transitions. [2021-03-11 00:17:16,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-11 00:17:16,534 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:17:16,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:16,848 INFO L225 Difference]: With dead ends: 146821 [2021-03-11 00:17:16,849 INFO L226 Difference]: Without dead ends: 146821 [2021-03-11 00:17:16,849 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1193.6ms TimeCoverageRelationStatistics Valid=1028, Invalid=2278, Unknown=0, NotChecked=0, Total=3306 [2021-03-11 00:17:17,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146821 states. [2021-03-11 00:17:19,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146821 to 128112. [2021-03-11 00:17:19,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128112 states, 128111 states have (on average 2.918640866123908) internal successors, (373910), 128111 states have internal predecessors, (373910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:20,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128112 states to 128112 states and 373910 transitions. [2021-03-11 00:17:20,732 INFO L78 Accepts]: Start accepts. Automaton has 128112 states and 373910 transitions. Word has length 43 [2021-03-11 00:17:20,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:20,733 INFO L480 AbstractCegarLoop]: Abstraction has 128112 states and 373910 transitions. [2021-03-11 00:17:20,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:20,733 INFO L276 IsEmpty]: Start isEmpty. Operand 128112 states and 373910 transitions. [2021-03-11 00:17:21,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:17:21,394 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:21,394 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:21,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:21,618 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:21,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:21,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1895135802, now seen corresponding path program 174 times [2021-03-11 00:17:21,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:21,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90968010] [2021-03-11 00:17:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:21,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90968010] [2021-03-11 00:17:21,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209629484] [2021-03-11 00:17:21,685 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:21,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-11 00:17:21,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:21,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:17:21,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:21,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:21,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:17:21,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452323166] [2021-03-11 00:17:21,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:17:21,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:21,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:17:21,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:17:21,892 INFO L87 Difference]: Start difference. First operand 128112 states and 373910 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:23,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:23,281 INFO L93 Difference]: Finished difference Result 155433 states and 452054 transitions. [2021-03-11 00:17:23,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:17:23,282 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:17:23,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:23,620 INFO L225 Difference]: With dead ends: 155433 [2021-03-11 00:17:23,620 INFO L226 Difference]: Without dead ends: 155361 [2021-03-11 00:17:23,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 529.1ms TimeCoverageRelationStatistics Valid=524, Invalid=1638, Unknown=0, NotChecked=0, Total=2162 [2021-03-11 00:17:23,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155361 states. [2021-03-11 00:17:26,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155361 to 132284. [2021-03-11 00:17:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132284 states, 132283 states have (on average 2.9201031122668826) internal successors, (386280), 132283 states have internal predecessors, (386280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:27,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132284 states to 132284 states and 386280 transitions. [2021-03-11 00:17:27,389 INFO L78 Accepts]: Start accepts. Automaton has 132284 states and 386280 transitions. Word has length 43 [2021-03-11 00:17:27,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:27,389 INFO L480 AbstractCegarLoop]: Abstraction has 132284 states and 386280 transitions. [2021-03-11 00:17:27,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:27,390 INFO L276 IsEmpty]: Start isEmpty. Operand 132284 states and 386280 transitions. [2021-03-11 00:17:27,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:17:27,600 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:27,600 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:27,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:27,803 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:27,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:27,803 INFO L82 PathProgramCache]: Analyzing trace with hash 562421890, now seen corresponding path program 175 times [2021-03-11 00:17:27,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:27,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763622309] [2021-03-11 00:17:27,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:27,852 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:27,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763622309] [2021-03-11 00:17:27,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788075851] [2021-03-11 00:17:27,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:27,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:17:27,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:27,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:27,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:17:27,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252402492] [2021-03-11 00:17:27,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:17:27,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:27,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:17:27,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:17:27,994 INFO L87 Difference]: Start difference. First operand 132284 states and 386280 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:30,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:30,029 INFO L93 Difference]: Finished difference Result 150155 states and 436032 transitions. [2021-03-11 00:17:30,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-11 00:17:30,030 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:17:30,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:30,422 INFO L225 Difference]: With dead ends: 150155 [2021-03-11 00:17:30,422 INFO L226 Difference]: Without dead ends: 150155 [2021-03-11 00:17:30,423 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 583.5ms TimeCoverageRelationStatistics Valid=1199, Invalid=2341, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:17:30,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150155 states. [2021-03-11 00:17:33,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150155 to 137722. [2021-03-11 00:17:33,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137722 states, 137721 states have (on average 2.9257774776540977) internal successors, (402941), 137721 states have internal predecessors, (402941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:33,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137722 states to 137722 states and 402941 transitions. [2021-03-11 00:17:33,581 INFO L78 Accepts]: Start accepts. Automaton has 137722 states and 402941 transitions. Word has length 43 [2021-03-11 00:17:33,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:33,581 INFO L480 AbstractCegarLoop]: Abstraction has 137722 states and 402941 transitions. [2021-03-11 00:17:33,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:33,581 INFO L276 IsEmpty]: Start isEmpty. Operand 137722 states and 402941 transitions. [2021-03-11 00:17:33,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:17:33,791 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:33,791 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:33,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:33,991 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:33,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:33,992 INFO L82 PathProgramCache]: Analyzing trace with hash 351724844, now seen corresponding path program 176 times [2021-03-11 00:17:33,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:33,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336461987] [2021-03-11 00:17:33,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:34,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336461987] [2021-03-11 00:17:34,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931248323] [2021-03-11 00:17:34,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:34,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:17:34,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:34,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:17:34,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:34,733 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2021-03-11 00:17:34,752 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:34,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:34,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:17:34,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106029048] [2021-03-11 00:17:34,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:17:34,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:34,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:17:34,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:17:34,754 INFO L87 Difference]: Start difference. First operand 137722 states and 402941 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:36,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:36,044 INFO L93 Difference]: Finished difference Result 160830 states and 467965 transitions. [2021-03-11 00:17:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-11 00:17:36,045 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:17:36,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:36,380 INFO L225 Difference]: With dead ends: 160830 [2021-03-11 00:17:36,381 INFO L226 Difference]: Without dead ends: 160812 [2021-03-11 00:17:36,381 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 472.4ms TimeCoverageRelationStatistics Valid=571, Invalid=1685, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:17:36,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160812 states. [2021-03-11 00:17:39,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160812 to 140830. [2021-03-11 00:17:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140830 states, 140829 states have (on average 2.926677033849562) internal successors, (412161), 140829 states have internal predecessors, (412161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:40,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140830 states to 140830 states and 412161 transitions. [2021-03-11 00:17:40,509 INFO L78 Accepts]: Start accepts. Automaton has 140830 states and 412161 transitions. Word has length 43 [2021-03-11 00:17:40,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:40,509 INFO L480 AbstractCegarLoop]: Abstraction has 140830 states and 412161 transitions. [2021-03-11 00:17:40,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:40,510 INFO L276 IsEmpty]: Start isEmpty. Operand 140830 states and 412161 transitions. [2021-03-11 00:17:40,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:17:40,748 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:40,748 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:40,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:40,948 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:40,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:40,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1080476662, now seen corresponding path program 177 times [2021-03-11 00:17:40,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:40,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169573479] [2021-03-11 00:17:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:40,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:41,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169573479] [2021-03-11 00:17:41,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517555729] [2021-03-11 00:17:41,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:41,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:17:41,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:41,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:17:41,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:41,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:41,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:17:41,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173920310] [2021-03-11 00:17:41,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:17:41,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:41,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:17:41,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:17:41,178 INFO L87 Difference]: Start difference. First operand 140830 states and 412161 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:43,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:43,294 INFO L93 Difference]: Finished difference Result 159256 states and 460219 transitions. [2021-03-11 00:17:43,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-03-11 00:17:43,295 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:17:43,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:43,618 INFO L225 Difference]: With dead ends: 159256 [2021-03-11 00:17:43,618 INFO L226 Difference]: Without dead ends: 159221 [2021-03-11 00:17:43,619 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 1371.7ms TimeCoverageRelationStatistics Valid=1351, Invalid=3341, Unknown=0, NotChecked=0, Total=4692 [2021-03-11 00:17:43,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159221 states. [2021-03-11 00:17:46,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159221 to 134138. [2021-03-11 00:17:46,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134138 states, 134137 states have (on average 2.9139834646667215) internal successors, (390873), 134137 states have internal predecessors, (390873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:47,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134138 states to 134138 states and 390873 transitions. [2021-03-11 00:17:47,589 INFO L78 Accepts]: Start accepts. Automaton has 134138 states and 390873 transitions. Word has length 43 [2021-03-11 00:17:47,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:47,590 INFO L480 AbstractCegarLoop]: Abstraction has 134138 states and 390873 transitions. [2021-03-11 00:17:47,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:47,590 INFO L276 IsEmpty]: Start isEmpty. Operand 134138 states and 390873 transitions. [2021-03-11 00:17:47,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:17:47,782 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:47,782 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:47,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:47,982 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:47,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:47,983 INFO L82 PathProgramCache]: Analyzing trace with hash 703505508, now seen corresponding path program 178 times [2021-03-11 00:17:47,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:47,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939279005] [2021-03-11 00:17:47,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:48,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939279005] [2021-03-11 00:17:48,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296613935] [2021-03-11 00:17:48,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:48,054 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:17:48,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:48,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:17:48,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:48,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:48,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-11 00:17:48,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232663729] [2021-03-11 00:17:48,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:17:48,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:48,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:17:48,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:17:48,174 INFO L87 Difference]: Start difference. First operand 134138 states and 390873 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:49,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:49,267 INFO L93 Difference]: Finished difference Result 141310 states and 410001 transitions. [2021-03-11 00:17:49,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:17:49,268 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:17:49,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:50,300 INFO L225 Difference]: With dead ends: 141310 [2021-03-11 00:17:50,300 INFO L226 Difference]: Without dead ends: 141296 [2021-03-11 00:17:50,300 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 405.8ms TimeCoverageRelationStatistics Valid=781, Invalid=1475, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:17:50,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141296 states. [2021-03-11 00:17:52,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141296 to 115950. [2021-03-11 00:17:52,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115950 states, 115949 states have (on average 2.9078215422297733) internal successors, (337159), 115949 states have internal predecessors, (337159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:53,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115950 states to 115950 states and 337159 transitions. [2021-03-11 00:17:53,188 INFO L78 Accepts]: Start accepts. Automaton has 115950 states and 337159 transitions. Word has length 43 [2021-03-11 00:17:53,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:53,188 INFO L480 AbstractCegarLoop]: Abstraction has 115950 states and 337159 transitions. [2021-03-11 00:17:53,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:53,188 INFO L276 IsEmpty]: Start isEmpty. Operand 115950 states and 337159 transitions. [2021-03-11 00:17:53,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:17:53,361 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:53,361 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:53,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-03-11 00:17:53,562 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:53,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:53,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1361898402, now seen corresponding path program 179 times [2021-03-11 00:17:53,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:53,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423747432] [2021-03-11 00:17:53,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:53,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423747432] [2021-03-11 00:17:53,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745847813] [2021-03-11 00:17:53,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:53,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:17:53,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:53,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:17:53,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:53,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:53,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:17:53,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350760677] [2021-03-11 00:17:53,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:17:53,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:53,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:17:53,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:17:53,787 INFO L87 Difference]: Start difference. First operand 115950 states and 337159 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:55,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:17:55,425 INFO L93 Difference]: Finished difference Result 127926 states and 369902 transitions. [2021-03-11 00:17:55,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-11 00:17:55,426 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:17:55,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:17:55,743 INFO L225 Difference]: With dead ends: 127926 [2021-03-11 00:17:55,743 INFO L226 Difference]: Without dead ends: 127860 [2021-03-11 00:17:55,744 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 444.3ms TimeCoverageRelationStatistics Valid=631, Invalid=1439, Unknown=0, NotChecked=0, Total=2070 [2021-03-11 00:17:55,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127860 states. [2021-03-11 00:17:57,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127860 to 115578. [2021-03-11 00:17:57,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115578 states, 115577 states have (on average 2.908424686572588) internal successors, (336147), 115577 states have internal predecessors, (336147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:58,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115578 states to 115578 states and 336147 transitions. [2021-03-11 00:17:58,458 INFO L78 Accepts]: Start accepts. Automaton has 115578 states and 336147 transitions. Word has length 43 [2021-03-11 00:17:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:17:58,458 INFO L480 AbstractCegarLoop]: Abstraction has 115578 states and 336147 transitions. [2021-03-11 00:17:58,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:17:58,458 INFO L276 IsEmpty]: Start isEmpty. Operand 115578 states and 336147 transitions. [2021-03-11 00:17:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:17:58,653 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:17:58,654 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:17:58,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-03-11 00:17:58,854 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:17:58,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:17:58,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1179331944, now seen corresponding path program 180 times [2021-03-11 00:17:58,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:17:58,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081632802] [2021-03-11 00:17:58,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:17:58,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:17:58,904 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:58,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081632802] [2021-03-11 00:17:58,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948529947] [2021-03-11 00:17:58,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:17:58,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:17:58,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:17:58,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:17:58,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:17:59,070 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:17:59,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:17:59,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-03-11 00:17:59,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538174123] [2021-03-11 00:17:59,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:17:59,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:17:59,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:17:59,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:17:59,071 INFO L87 Difference]: Start difference. First operand 115578 states and 336147 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:00,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:00,175 INFO L93 Difference]: Finished difference Result 133198 states and 384912 transitions. [2021-03-11 00:18:00,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-11 00:18:00,176 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:18:00,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:00,503 INFO L225 Difference]: With dead ends: 133198 [2021-03-11 00:18:00,504 INFO L226 Difference]: Without dead ends: 133168 [2021-03-11 00:18:00,504 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 454.8ms TimeCoverageRelationStatistics Valid=682, Invalid=1574, Unknown=0, NotChecked=0, Total=2256 [2021-03-11 00:18:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133168 states. [2021-03-11 00:18:03,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133168 to 116890. [2021-03-11 00:18:03,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116890 states, 116889 states have (on average 2.9079810760636158) internal successors, (339911), 116889 states have internal predecessors, (339911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:04,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116890 states to 116890 states and 339911 transitions. [2021-03-11 00:18:04,041 INFO L78 Accepts]: Start accepts. Automaton has 116890 states and 339911 transitions. Word has length 43 [2021-03-11 00:18:04,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:04,041 INFO L480 AbstractCegarLoop]: Abstraction has 116890 states and 339911 transitions. [2021-03-11 00:18:04,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:04,041 INFO L276 IsEmpty]: Start isEmpty. Operand 116890 states and 339911 transitions. [2021-03-11 00:18:04,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:18:04,328 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:04,329 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:04,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-03-11 00:18:04,529 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:04,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:04,529 INFO L82 PathProgramCache]: Analyzing trace with hash 81707166, now seen corresponding path program 181 times [2021-03-11 00:18:04,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:04,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516795784] [2021-03-11 00:18:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:04,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516795784] [2021-03-11 00:18:04,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789677498] [2021-03-11 00:18:04,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:04,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:18:04,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:04,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:04,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-03-11 00:18:04,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010127492] [2021-03-11 00:18:04,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:18:04,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:04,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:18:04,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:18:04,731 INFO L87 Difference]: Start difference. First operand 116890 states and 339911 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:06,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:06,054 INFO L93 Difference]: Finished difference Result 146130 states and 421362 transitions. [2021-03-11 00:18:06,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-11 00:18:06,055 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:18:06,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:06,367 INFO L225 Difference]: With dead ends: 146130 [2021-03-11 00:18:06,368 INFO L226 Difference]: Without dead ends: 146118 [2021-03-11 00:18:06,368 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 560.9ms TimeCoverageRelationStatistics Valid=983, Invalid=2097, Unknown=0, NotChecked=0, Total=3080 [2021-03-11 00:18:07,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146118 states. [2021-03-11 00:18:09,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146118 to 118510. [2021-03-11 00:18:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118510 states, 118509 states have (on average 2.9064037330498107) internal successors, (344435), 118509 states have internal predecessors, (344435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118510 states to 118510 states and 344435 transitions. [2021-03-11 00:18:09,997 INFO L78 Accepts]: Start accepts. Automaton has 118510 states and 344435 transitions. Word has length 43 [2021-03-11 00:18:09,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:09,997 INFO L480 AbstractCegarLoop]: Abstraction has 118510 states and 344435 transitions. [2021-03-11 00:18:09,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:09,997 INFO L276 IsEmpty]: Start isEmpty. Operand 118510 states and 344435 transitions. [2021-03-11 00:18:10,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:18:10,174 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:10,174 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:10,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:10,374 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:10,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:10,375 INFO L82 PathProgramCache]: Analyzing trace with hash 981002536, now seen corresponding path program 182 times [2021-03-11 00:18:10,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:10,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981729590] [2021-03-11 00:18:10,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:10,416 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:10,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981729590] [2021-03-11 00:18:10,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649841088] [2021-03-11 00:18:10,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:10,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:18:10,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:10,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:18:10,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:10,565 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:10,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:10,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-03-11 00:18:10,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475478288] [2021-03-11 00:18:10,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:18:10,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:10,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:18:10,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:18:10,566 INFO L87 Difference]: Start difference. First operand 118510 states and 344435 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:12,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:12,476 INFO L93 Difference]: Finished difference Result 143239 states and 413544 transitions. [2021-03-11 00:18:12,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-11 00:18:12,477 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:18:12,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:12,817 INFO L225 Difference]: With dead ends: 143239 [2021-03-11 00:18:12,818 INFO L226 Difference]: Without dead ends: 143239 [2021-03-11 00:18:12,818 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 595.1ms TimeCoverageRelationStatistics Valid=1190, Invalid=2350, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:18:12,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143239 states. [2021-03-11 00:18:15,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143239 to 124722. [2021-03-11 00:18:15,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124722 states, 124721 states have (on average 2.9106966749785523) internal successors, (363025), 124721 states have internal predecessors, (363025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:15,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124722 states to 124722 states and 363025 transitions. [2021-03-11 00:18:15,822 INFO L78 Accepts]: Start accepts. Automaton has 124722 states and 363025 transitions. Word has length 43 [2021-03-11 00:18:15,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:15,822 INFO L480 AbstractCegarLoop]: Abstraction has 124722 states and 363025 transitions. [2021-03-11 00:18:15,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:15,822 INFO L276 IsEmpty]: Start isEmpty. Operand 124722 states and 363025 transitions. [2021-03-11 00:18:16,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:18:16,019 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:16,020 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:16,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:16,220 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:16,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:16,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1122086154, now seen corresponding path program 183 times [2021-03-11 00:18:16,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:16,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979152267] [2021-03-11 00:18:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:18:16,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979152267] [2021-03-11 00:18:16,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401882845] [2021-03-11 00:18:16,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:16,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-11 00:18:16,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:16,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:18:16,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:16,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:16,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-03-11 00:18:16,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788730334] [2021-03-11 00:18:16,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:18:16,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:16,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:18:16,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:18:16,413 INFO L87 Difference]: Start difference. First operand 124722 states and 363025 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:18,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:18,209 INFO L93 Difference]: Finished difference Result 138897 states and 401745 transitions. [2021-03-11 00:18:18,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-11 00:18:18,210 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:18:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:18,517 INFO L225 Difference]: With dead ends: 138897 [2021-03-11 00:18:18,517 INFO L226 Difference]: Without dead ends: 138876 [2021-03-11 00:18:18,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 470.8ms TimeCoverageRelationStatistics Valid=847, Invalid=1703, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:18:18,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138876 states. [2021-03-11 00:18:20,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138876 to 110056. [2021-03-11 00:18:21,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110056 states, 110055 states have (on average 2.902385171050838) internal successors, (319422), 110055 states have internal predecessors, (319422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110056 states to 110056 states and 319422 transitions. [2021-03-11 00:18:21,403 INFO L78 Accepts]: Start accepts. Automaton has 110056 states and 319422 transitions. Word has length 43 [2021-03-11 00:18:21,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:21,403 INFO L480 AbstractCegarLoop]: Abstraction has 110056 states and 319422 transitions. [2021-03-11 00:18:21,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:21,403 INFO L276 IsEmpty]: Start isEmpty. Operand 110056 states and 319422 transitions. [2021-03-11 00:18:21,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:18:21,555 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:21,555 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:21,767 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-03-11 00:18:21,767 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:21,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:21,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1206484928, now seen corresponding path program 184 times [2021-03-11 00:18:21,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:21,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111397719] [2021-03-11 00:18:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:21,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:21,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111397719] [2021-03-11 00:18:21,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27123729] [2021-03-11 00:18:21,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:21,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:18:21,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:21,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:18:21,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:21,976 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:21,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:21,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-11 00:18:21,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815387321] [2021-03-11 00:18:21,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:18:21,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:21,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:18:21,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:18:21,977 INFO L87 Difference]: Start difference. First operand 110056 states and 319422 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:23,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:23,480 INFO L93 Difference]: Finished difference Result 127374 states and 367364 transitions. [2021-03-11 00:18:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-11 00:18:23,481 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:18:23,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:23,779 INFO L225 Difference]: With dead ends: 127374 [2021-03-11 00:18:23,780 INFO L226 Difference]: Without dead ends: 127318 [2021-03-11 00:18:23,780 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 432.0ms TimeCoverageRelationStatistics Valid=776, Invalid=1674, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:18:23,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127318 states. [2021-03-11 00:18:26,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127318 to 108532. [2021-03-11 00:18:26,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108532 states, 108531 states have (on average 2.907795929273664) internal successors, (315586), 108531 states have internal predecessors, (315586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:27,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108532 states to 108532 states and 315586 transitions. [2021-03-11 00:18:27,093 INFO L78 Accepts]: Start accepts. Automaton has 108532 states and 315586 transitions. Word has length 43 [2021-03-11 00:18:27,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:27,093 INFO L480 AbstractCegarLoop]: Abstraction has 108532 states and 315586 transitions. [2021-03-11 00:18:27,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:27,093 INFO L276 IsEmpty]: Start isEmpty. Operand 108532 states and 315586 transitions. [2021-03-11 00:18:27,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:18:27,291 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:27,291 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:27,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:27,507 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:27,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:27,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1475403872, now seen corresponding path program 185 times [2021-03-11 00:18:27,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:27,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855028776] [2021-03-11 00:18:27,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:27,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855028776] [2021-03-11 00:18:27,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050761115] [2021-03-11 00:18:27,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:27,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:18:27,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:27,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:18:27,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:27,783 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:27,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:27,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:18:27,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948216910] [2021-03-11 00:18:27,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:18:27,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:27,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:18:27,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:18:27,785 INFO L87 Difference]: Start difference. First operand 108532 states and 315586 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:28,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:28,933 INFO L93 Difference]: Finished difference Result 118383 states and 342092 transitions. [2021-03-11 00:18:28,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:18:28,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:18:28,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:29,669 INFO L225 Difference]: With dead ends: 118383 [2021-03-11 00:18:29,669 INFO L226 Difference]: Without dead ends: 118317 [2021-03-11 00:18:29,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 532.2ms TimeCoverageRelationStatistics Valid=676, Invalid=1676, Unknown=0, NotChecked=0, Total=2352 [2021-03-11 00:18:29,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118317 states. [2021-03-11 00:18:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118317 to 107352. [2021-03-11 00:18:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107352 states, 107351 states have (on average 2.907192294436009) internal successors, (312090), 107351 states have internal predecessors, (312090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:31,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107352 states to 107352 states and 312090 transitions. [2021-03-11 00:18:31,958 INFO L78 Accepts]: Start accepts. Automaton has 107352 states and 312090 transitions. Word has length 43 [2021-03-11 00:18:31,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:31,958 INFO L480 AbstractCegarLoop]: Abstraction has 107352 states and 312090 transitions. [2021-03-11 00:18:31,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 18 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:31,958 INFO L276 IsEmpty]: Start isEmpty. Operand 107352 states and 312090 transitions. [2021-03-11 00:18:32,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:18:32,122 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:32,122 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:32,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable284 [2021-03-11 00:18:32,323 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:32,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:32,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1857040322, now seen corresponding path program 186 times [2021-03-11 00:18:32,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:32,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696841223] [2021-03-11 00:18:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:32,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696841223] [2021-03-11 00:18:32,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949630964] [2021-03-11 00:18:32,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:32,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:18:32,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:32,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:18:32,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:33,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:33,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-11 00:18:33,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510039017] [2021-03-11 00:18:33,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:18:33,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:33,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:18:33,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:18:33,064 INFO L87 Difference]: Start difference. First operand 107352 states and 312090 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:34,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:34,229 INFO L93 Difference]: Finished difference Result 131564 states and 379356 transitions. [2021-03-11 00:18:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-11 00:18:34,230 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:18:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:34,483 INFO L225 Difference]: With dead ends: 131564 [2021-03-11 00:18:34,483 INFO L226 Difference]: Without dead ends: 131534 [2021-03-11 00:18:34,484 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1005.9ms TimeCoverageRelationStatistics Valid=732, Invalid=1718, Unknown=0, NotChecked=0, Total=2450 [2021-03-11 00:18:34,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131534 states. [2021-03-11 00:18:36,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131534 to 108868. [2021-03-11 00:18:37,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108868 states, 108867 states have (on average 2.9046267463969797) internal successors, (316218), 108867 states have internal predecessors, (316218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:37,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108868 states to 108868 states and 316218 transitions. [2021-03-11 00:18:37,333 INFO L78 Accepts]: Start accepts. Automaton has 108868 states and 316218 transitions. Word has length 43 [2021-03-11 00:18:37,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:37,333 INFO L480 AbstractCegarLoop]: Abstraction has 108868 states and 316218 transitions. [2021-03-11 00:18:37,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 17 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:37,333 INFO L276 IsEmpty]: Start isEmpty. Operand 108868 states and 316218 transitions. [2021-03-11 00:18:37,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:18:37,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:37,478 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:37,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:37,679 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:37,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:37,679 INFO L82 PathProgramCache]: Analyzing trace with hash 228319968, now seen corresponding path program 187 times [2021-03-11 00:18:37,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:37,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650892568] [2021-03-11 00:18:37,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:37,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650892568] [2021-03-11 00:18:37,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977788901] [2021-03-11 00:18:37,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:37,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:18:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:37,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:37,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-03-11 00:18:37,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117709568] [2021-03-11 00:18:37,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:18:37,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:37,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:18:37,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:18:37,874 INFO L87 Difference]: Start difference. First operand 108868 states and 316218 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:39,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:39,698 INFO L93 Difference]: Finished difference Result 147839 states and 426243 transitions. [2021-03-11 00:18:39,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-11 00:18:39,699 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:18:39,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:40,026 INFO L225 Difference]: With dead ends: 147839 [2021-03-11 00:18:40,026 INFO L226 Difference]: Without dead ends: 147833 [2021-03-11 00:18:40,027 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 591.0ms TimeCoverageRelationStatistics Valid=975, Invalid=1995, Unknown=0, NotChecked=0, Total=2970 [2021-03-11 00:18:40,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147833 states. [2021-03-11 00:18:42,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147833 to 114810. [2021-03-11 00:18:42,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114810 states, 114809 states have (on average 2.9023421508766734) internal successors, (333215), 114809 states have internal predecessors, (333215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:43,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114810 states to 114810 states and 333215 transitions. [2021-03-11 00:18:43,149 INFO L78 Accepts]: Start accepts. Automaton has 114810 states and 333215 transitions. Word has length 43 [2021-03-11 00:18:43,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:43,149 INFO L480 AbstractCegarLoop]: Abstraction has 114810 states and 333215 transitions. [2021-03-11 00:18:43,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:43,150 INFO L276 IsEmpty]: Start isEmpty. Operand 114810 states and 333215 transitions. [2021-03-11 00:18:43,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:18:43,327 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:43,327 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:43,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:43,527 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:43,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:43,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1707881602, now seen corresponding path program 188 times [2021-03-11 00:18:43,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:43,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258630215] [2021-03-11 00:18:43,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:43,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258630215] [2021-03-11 00:18:43,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267689984] [2021-03-11 00:18:43,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:43,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:18:43,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:43,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:18:43,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:43,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:43,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-03-11 00:18:43,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642221624] [2021-03-11 00:18:43,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:18:43,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:43,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:18:43,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:18:43,722 INFO L87 Difference]: Start difference. First operand 114810 states and 333215 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:45,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:45,787 INFO L93 Difference]: Finished difference Result 151597 states and 435976 transitions. [2021-03-11 00:18:45,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-11 00:18:45,788 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:18:45,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:46,115 INFO L225 Difference]: With dead ends: 151597 [2021-03-11 00:18:46,115 INFO L226 Difference]: Without dead ends: 151597 [2021-03-11 00:18:46,116 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 816.7ms TimeCoverageRelationStatistics Valid=1526, Invalid=3030, Unknown=0, NotChecked=0, Total=4556 [2021-03-11 00:18:46,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151597 states. [2021-03-11 00:18:48,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151597 to 124310. [2021-03-11 00:18:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124310 states, 124309 states have (on average 2.9047856551014006) internal successors, (361091), 124309 states have internal predecessors, (361091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:49,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124310 states to 124310 states and 361091 transitions. [2021-03-11 00:18:49,947 INFO L78 Accepts]: Start accepts. Automaton has 124310 states and 361091 transitions. Word has length 43 [2021-03-11 00:18:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:49,947 INFO L480 AbstractCegarLoop]: Abstraction has 124310 states and 361091 transitions. [2021-03-11 00:18:49,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:49,947 INFO L276 IsEmpty]: Start isEmpty. Operand 124310 states and 361091 transitions. [2021-03-11 00:18:50,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:18:50,148 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:50,148 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:50,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2021-03-11 00:18:50,348 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:50,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:50,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1848965220, now seen corresponding path program 189 times [2021-03-11 00:18:50,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:50,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907892272] [2021-03-11 00:18:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:50,385 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:18:50,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907892272] [2021-03-11 00:18:50,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115109579] [2021-03-11 00:18:50,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:50,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-11 00:18:50,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:50,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:18:50,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:50,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:50,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-03-11 00:18:50,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114759517] [2021-03-11 00:18:50,552 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:18:50,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:50,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:18:50,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:18:50,553 INFO L87 Difference]: Start difference. First operand 124310 states and 361091 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:51,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:51,883 INFO L93 Difference]: Finished difference Result 147763 states and 425526 transitions. [2021-03-11 00:18:51,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-11 00:18:51,884 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:18:51,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:52,945 INFO L225 Difference]: With dead ends: 147763 [2021-03-11 00:18:52,946 INFO L226 Difference]: Without dead ends: 147742 [2021-03-11 00:18:52,946 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 579.6ms TimeCoverageRelationStatistics Valid=1030, Invalid=2162, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:18:53,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147742 states. [2021-03-11 00:18:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147742 to 118770. [2021-03-11 00:18:55,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118770 states, 118769 states have (on average 2.8996034318719532) internal successors, (344383), 118769 states have internal predecessors, (344383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:55,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118770 states to 118770 states and 344383 transitions. [2021-03-11 00:18:55,902 INFO L78 Accepts]: Start accepts. Automaton has 118770 states and 344383 transitions. Word has length 43 [2021-03-11 00:18:55,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:18:55,902 INFO L480 AbstractCegarLoop]: Abstraction has 118770 states and 344383 transitions. [2021-03-11 00:18:55,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:55,903 INFO L276 IsEmpty]: Start isEmpty. Operand 118770 states and 344383 transitions. [2021-03-11 00:18:56,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:18:56,078 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:18:56,078 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:18:56,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-03-11 00:18:56,278 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:18:56,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:18:56,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1933363994, now seen corresponding path program 190 times [2021-03-11 00:18:56,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:18:56,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629333987] [2021-03-11 00:18:56,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:18:56,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:18:56,320 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:18:56,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629333987] [2021-03-11 00:18:56,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819757095] [2021-03-11 00:18:56,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:18:56,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:18:56,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:18:56,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:18:56,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:18:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:18:56,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:18:56,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-03-11 00:18:56,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023354877] [2021-03-11 00:18:56,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:18:56,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:18:56,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:18:56,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:18:56,481 INFO L87 Difference]: Start difference. First operand 118770 states and 344383 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:18:58,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:18:58,320 INFO L93 Difference]: Finished difference Result 146285 states and 420637 transitions. [2021-03-11 00:18:58,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-11 00:18:58,321 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:18:58,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:18:58,657 INFO L225 Difference]: With dead ends: 146285 [2021-03-11 00:18:58,657 INFO L226 Difference]: Without dead ends: 146201 [2021-03-11 00:18:58,658 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 520.1ms TimeCoverageRelationStatistics Valid=877, Invalid=1985, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:18:58,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146201 states. [2021-03-11 00:19:01,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146201 to 117655. [2021-03-11 00:19:01,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117655 states, 117654 states have (on average 2.900921345640607) internal successors, (341305), 117654 states have internal predecessors, (341305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:01,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117655 states to 117655 states and 341305 transitions. [2021-03-11 00:19:01,718 INFO L78 Accepts]: Start accepts. Automaton has 117655 states and 341305 transitions. Word has length 43 [2021-03-11 00:19:01,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:01,718 INFO L480 AbstractCegarLoop]: Abstraction has 117655 states and 341305 transitions. [2021-03-11 00:19:01,718 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:01,718 INFO L276 IsEmpty]: Start isEmpty. Operand 117655 states and 341305 transitions. [2021-03-11 00:19:01,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:19:01,886 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:01,886 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:02,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2021-03-11 00:19:02,086 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:02,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:02,087 INFO L82 PathProgramCache]: Analyzing trace with hash -721565792, now seen corresponding path program 191 times [2021-03-11 00:19:02,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:02,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11272409] [2021-03-11 00:19:02,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:02,136 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:02,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11272409] [2021-03-11 00:19:02,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485831013] [2021-03-11 00:19:02,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:02,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-11 00:19:02,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:02,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:19:02,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:02,302 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:02,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:02,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-11 00:19:02,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158530908] [2021-03-11 00:19:02,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:19:02,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:02,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:19:02,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:19:02,303 INFO L87 Difference]: Start difference. First operand 117655 states and 341305 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:03,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:03,883 INFO L93 Difference]: Finished difference Result 145865 states and 419264 transitions. [2021-03-11 00:19:03,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-11 00:19:03,884 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:19:03,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:04,198 INFO L225 Difference]: With dead ends: 145865 [2021-03-11 00:19:04,198 INFO L226 Difference]: Without dead ends: 145767 [2021-03-11 00:19:04,198 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 458.2ms TimeCoverageRelationStatistics Valid=746, Invalid=1804, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:19:04,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145767 states. [2021-03-11 00:19:06,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145767 to 119378. [2021-03-11 00:19:06,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119378 states, 119377 states have (on average 2.90281209948315) internal successors, (346529), 119377 states have internal predecessors, (346529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119378 states to 119378 states and 346529 transitions. [2021-03-11 00:19:06,944 INFO L78 Accepts]: Start accepts. Automaton has 119378 states and 346529 transitions. Word has length 43 [2021-03-11 00:19:06,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:06,944 INFO L480 AbstractCegarLoop]: Abstraction has 119378 states and 346529 transitions. [2021-03-11 00:19:06,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:06,944 INFO L276 IsEmpty]: Start isEmpty. Operand 119378 states and 346529 transitions. [2021-03-11 00:19:07,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:19:07,105 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:07,105 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:07,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:07,305 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:07,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1517368606, now seen corresponding path program 192 times [2021-03-11 00:19:07,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:07,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249960554] [2021-03-11 00:19:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:07,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:07,357 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:07,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249960554] [2021-03-11 00:19:07,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021788712] [2021-03-11 00:19:07,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:07,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:19:07,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:07,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:19:07,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:07,542 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:07,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:07,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:19:07,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396553336] [2021-03-11 00:19:07,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:19:07,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:07,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:19:07,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:19:07,543 INFO L87 Difference]: Start difference. First operand 119378 states and 346529 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:09,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:09,222 INFO L93 Difference]: Finished difference Result 132585 states and 382534 transitions. [2021-03-11 00:19:09,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-11 00:19:09,222 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:19:09,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:09,467 INFO L225 Difference]: With dead ends: 132585 [2021-03-11 00:19:09,467 INFO L226 Difference]: Without dead ends: 132519 [2021-03-11 00:19:09,467 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 568.2ms TimeCoverageRelationStatistics Valid=708, Invalid=1842, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:19:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132519 states. [2021-03-11 00:19:11,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132519 to 121218. [2021-03-11 00:19:11,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121218 states, 121217 states have (on average 2.89966753838158) internal successors, (351489), 121217 states have internal predecessors, (351489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:12,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121218 states to 121218 states and 351489 transitions. [2021-03-11 00:19:12,206 INFO L78 Accepts]: Start accepts. Automaton has 121218 states and 351489 transitions. Word has length 43 [2021-03-11 00:19:12,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:12,206 INFO L480 AbstractCegarLoop]: Abstraction has 121218 states and 351489 transitions. [2021-03-11 00:19:12,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:12,206 INFO L276 IsEmpty]: Start isEmpty. Operand 121218 states and 351489 transitions. [2021-03-11 00:19:12,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:19:12,370 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:12,370 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:12,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2021-03-11 00:19:12,571 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:12,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:12,571 INFO L82 PathProgramCache]: Analyzing trace with hash 826070824, now seen corresponding path program 193 times [2021-03-11 00:19:12,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:12,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950751140] [2021-03-11 00:19:12,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:12,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950751140] [2021-03-11 00:19:12,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507784401] [2021-03-11 00:19:12,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:12,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:12,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:19:12,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:12,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:12,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-11 00:19:12,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293532516] [2021-03-11 00:19:12,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:19:12,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:12,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:19:12,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:19:12,797 INFO L87 Difference]: Start difference. First operand 121218 states and 351489 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:13,899 WARN L205 SmtUtils]: Spent 487.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2021-03-11 00:19:14,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:14,556 INFO L93 Difference]: Finished difference Result 149723 states and 431009 transitions. [2021-03-11 00:19:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-11 00:19:14,557 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:19:14,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:14,830 INFO L225 Difference]: With dead ends: 149723 [2021-03-11 00:19:14,830 INFO L226 Difference]: Without dead ends: 149693 [2021-03-11 00:19:14,830 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 1083.0ms TimeCoverageRelationStatistics Valid=809, Invalid=2053, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:19:14,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149693 states. [2021-03-11 00:19:17,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149693 to 126786. [2021-03-11 00:19:17,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126786 states, 126785 states have (on average 2.8991836573727174) internal successors, (367573), 126785 states have internal predecessors, (367573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:17,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126786 states to 126786 states and 367573 transitions. [2021-03-11 00:19:17,769 INFO L78 Accepts]: Start accepts. Automaton has 126786 states and 367573 transitions. Word has length 43 [2021-03-11 00:19:17,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:17,770 INFO L480 AbstractCegarLoop]: Abstraction has 126786 states and 367573 transitions. [2021-03-11 00:19:17,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 18 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:17,770 INFO L276 IsEmpty]: Start isEmpty. Operand 126786 states and 367573 transitions. [2021-03-11 00:19:17,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:19:17,937 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:17,937 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:18,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:18,138 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:18,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:18,138 INFO L82 PathProgramCache]: Analyzing trace with hash -11435682, now seen corresponding path program 194 times [2021-03-11 00:19:18,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:18,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208947111] [2021-03-11 00:19:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:18,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:18,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208947111] [2021-03-11 00:19:18,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95559447] [2021-03-11 00:19:18,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:18,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:19:18,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:18,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:19:18,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:18,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:18,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-11 00:19:18,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525612896] [2021-03-11 00:19:18,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:19:18,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:18,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:19:18,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:19:18,859 INFO L87 Difference]: Start difference. First operand 126786 states and 367573 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:20,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:20,371 INFO L93 Difference]: Finished difference Result 166212 states and 479147 transitions. [2021-03-11 00:19:20,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-03-11 00:19:20,372 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:19:20,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:20,691 INFO L225 Difference]: With dead ends: 166212 [2021-03-11 00:19:20,691 INFO L226 Difference]: Without dead ends: 166206 [2021-03-11 00:19:20,692 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1353 ImplicationChecksByTransitivity, 737.7ms TimeCoverageRelationStatistics Valid=1227, Invalid=2679, Unknown=0, NotChecked=0, Total=3906 [2021-03-11 00:19:20,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166206 states. [2021-03-11 00:19:23,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166206 to 136796. [2021-03-11 00:19:23,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136796 states, 136795 states have (on average 2.897576665813809) internal successors, (396374), 136795 states have internal predecessors, (396374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:24,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136796 states to 136796 states and 396374 transitions. [2021-03-11 00:19:24,301 INFO L78 Accepts]: Start accepts. Automaton has 136796 states and 396374 transitions. Word has length 43 [2021-03-11 00:19:24,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:24,301 INFO L480 AbstractCegarLoop]: Abstraction has 136796 states and 396374 transitions. [2021-03-11 00:19:24,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:24,301 INFO L276 IsEmpty]: Start isEmpty. Operand 136796 states and 396374 transitions. [2021-03-11 00:19:24,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:19:24,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:24,483 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:24,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:24,684 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:24,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:24,684 INFO L82 PathProgramCache]: Analyzing trace with hash 937030376, now seen corresponding path program 195 times [2021-03-11 00:19:24,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:24,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305704688] [2021-03-11 00:19:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:24,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305704688] [2021-03-11 00:19:24,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769741765] [2021-03-11 00:19:24,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:24,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:19:24,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:24,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:19:24,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:24,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:24,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-03-11 00:19:24,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198976623] [2021-03-11 00:19:24,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:19:24,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:24,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:19:24,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:19:24,888 INFO L87 Difference]: Start difference. First operand 136796 states and 396374 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:26,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:26,901 INFO L93 Difference]: Finished difference Result 194581 states and 559988 transitions. [2021-03-11 00:19:26,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-11 00:19:26,902 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:19:26,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:27,282 INFO L225 Difference]: With dead ends: 194581 [2021-03-11 00:19:27,282 INFO L226 Difference]: Without dead ends: 194581 [2021-03-11 00:19:27,282 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1617 ImplicationChecksByTransitivity, 720.6ms TimeCoverageRelationStatistics Valid=1414, Invalid=2876, Unknown=0, NotChecked=0, Total=4290 [2021-03-11 00:19:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194581 states. [2021-03-11 00:19:30,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194581 to 170412. [2021-03-11 00:19:30,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170412 states, 170411 states have (on average 2.8939563760555362) internal successors, (493162), 170411 states have internal predecessors, (493162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:31,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170412 states to 170412 states and 493162 transitions. [2021-03-11 00:19:31,231 INFO L78 Accepts]: Start accepts. Automaton has 170412 states and 493162 transitions. Word has length 43 [2021-03-11 00:19:31,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:31,231 INFO L480 AbstractCegarLoop]: Abstraction has 170412 states and 493162 transitions. [2021-03-11 00:19:31,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:31,231 INFO L276 IsEmpty]: Start isEmpty. Operand 170412 states and 493162 transitions. [2021-03-11 00:19:31,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:19:31,469 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:31,469 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:31,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,200 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:31,670 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:31,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:31,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1078113994, now seen corresponding path program 196 times [2021-03-11 00:19:31,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:31,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027694894] [2021-03-11 00:19:31,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:31,702 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:19:31,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027694894] [2021-03-11 00:19:31,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100293635] [2021-03-11 00:19:31,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:31,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:19:31,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:31,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:19:31,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:31,864 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:31,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:31,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2021-03-11 00:19:31,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595043367] [2021-03-11 00:19:31,865 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-11 00:19:31,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:31,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-11 00:19:31,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-03-11 00:19:31,865 INFO L87 Difference]: Start difference. First operand 170412 states and 493162 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:34,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:34,575 INFO L93 Difference]: Finished difference Result 192318 states and 553530 transitions. [2021-03-11 00:19:34,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-11 00:19:34,576 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:19:34,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:35,067 INFO L225 Difference]: With dead ends: 192318 [2021-03-11 00:19:35,067 INFO L226 Difference]: Without dead ends: 192304 [2021-03-11 00:19:35,067 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 691.1ms TimeCoverageRelationStatistics Valid=1091, Invalid=2449, Unknown=0, NotChecked=0, Total=3540 [2021-03-11 00:19:35,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192304 states. [2021-03-11 00:19:38,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192304 to 168920. [2021-03-11 00:19:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168920 states, 168919 states have (on average 2.8928658114244103) internal successors, (488660), 168919 states have internal predecessors, (488660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168920 states to 168920 states and 488660 transitions. [2021-03-11 00:19:39,202 INFO L78 Accepts]: Start accepts. Automaton has 168920 states and 488660 transitions. Word has length 43 [2021-03-11 00:19:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:39,202 INFO L480 AbstractCegarLoop]: Abstraction has 168920 states and 488660 transitions. [2021-03-11 00:19:39,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:39,202 INFO L276 IsEmpty]: Start isEmpty. Operand 168920 states and 488660 transitions. [2021-03-11 00:19:39,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:19:39,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:39,431 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:39,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:39,632 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:39,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:39,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1162512768, now seen corresponding path program 197 times [2021-03-11 00:19:39,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:39,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176417531] [2021-03-11 00:19:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:39,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:19:39,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176417531] [2021-03-11 00:19:39,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005784815] [2021-03-11 00:19:39,672 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:39,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-11 00:19:39,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:39,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:19:39,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:39,850 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:39,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:39,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-03-11 00:19:39,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601412345] [2021-03-11 00:19:39,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-11 00:19:39,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:39,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-11 00:19:39,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-03-11 00:19:39,851 INFO L87 Difference]: Start difference. First operand 168920 states and 488660 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:41,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:41,939 INFO L93 Difference]: Finished difference Result 193841 states and 557822 transitions. [2021-03-11 00:19:41,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-11 00:19:41,940 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:19:41,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:42,334 INFO L225 Difference]: With dead ends: 193841 [2021-03-11 00:19:42,334 INFO L226 Difference]: Without dead ends: 193785 [2021-03-11 00:19:42,334 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 607.3ms TimeCoverageRelationStatistics Valid=940, Invalid=2252, Unknown=0, NotChecked=0, Total=3192 [2021-03-11 00:19:42,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193785 states. [2021-03-11 00:19:45,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193785 to 172056. [2021-03-11 00:19:45,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172056 states, 172055 states have (on average 2.891900845659818) internal successors, (497566), 172055 states have internal predecessors, (497566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:46,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172056 states to 172056 states and 497566 transitions. [2021-03-11 00:19:46,361 INFO L78 Accepts]: Start accepts. Automaton has 172056 states and 497566 transitions. Word has length 43 [2021-03-11 00:19:46,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:46,361 INFO L480 AbstractCegarLoop]: Abstraction has 172056 states and 497566 transitions. [2021-03-11 00:19:46,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:46,361 INFO L276 IsEmpty]: Start isEmpty. Operand 172056 states and 497566 transitions. [2021-03-11 00:19:47,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:19:47,276 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:47,277 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:47,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:47,477 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:47,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:47,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1492417018, now seen corresponding path program 198 times [2021-03-11 00:19:47,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:47,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892315030] [2021-03-11 00:19:47,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-11 00:19:47,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892315030] [2021-03-11 00:19:47,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470276285] [2021-03-11 00:19:47,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:47,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:19:47,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:19:47,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:19:47,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:47,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:47,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-03-11 00:19:47,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74248498] [2021-03-11 00:19:47,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-11 00:19:47,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:47,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-11 00:19:47,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2021-03-11 00:19:47,698 INFO L87 Difference]: Start difference. First operand 172056 states and 497566 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:49,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:49,086 INFO L93 Difference]: Finished difference Result 200685 states and 577316 transitions. [2021-03-11 00:19:49,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-11 00:19:49,087 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:19:49,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:49,551 INFO L225 Difference]: With dead ends: 200685 [2021-03-11 00:19:49,551 INFO L226 Difference]: Without dead ends: 200587 [2021-03-11 00:19:49,551 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 527.3ms TimeCoverageRelationStatistics Valid=806, Invalid=2056, Unknown=0, NotChecked=0, Total=2862 [2021-03-11 00:19:50,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200587 states. [2021-03-11 00:19:53,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200587 to 178420. [2021-03-11 00:19:53,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178420 states, 178419 states have (on average 2.8910037608102277) internal successors, (515810), 178419 states have internal predecessors, (515810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:54,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178420 states to 178420 states and 515810 transitions. [2021-03-11 00:19:54,445 INFO L78 Accepts]: Start accepts. Automaton has 178420 states and 515810 transitions. Word has length 43 [2021-03-11 00:19:54,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:19:54,445 INFO L480 AbstractCegarLoop]: Abstraction has 178420 states and 515810 transitions. [2021-03-11 00:19:54,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:54,445 INFO L276 IsEmpty]: Start isEmpty. Operand 178420 states and 515810 transitions. [2021-03-11 00:19:54,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-03-11 00:19:54,697 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:19:54,697 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:19:54,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:54,897 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:19:54,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:19:54,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1612051392, now seen corresponding path program 199 times [2021-03-11 00:19:54,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:19:54,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314835439] [2021-03-11 00:19:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:19:54,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:54,950 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:54,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314835439] [2021-03-11 00:19:54,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071826914] [2021-03-11 00:19:54,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:19:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:19:54,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-11 00:19:54,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:19:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:19:55,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:19:55,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-03-11 00:19:55,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559854400] [2021-03-11 00:19:55,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-11 00:19:55,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:19:55,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-11 00:19:55,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-03-11 00:19:55,130 INFO L87 Difference]: Start difference. First operand 178420 states and 515810 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:19:57,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:19:57,183 INFO L93 Difference]: Finished difference Result 203904 states and 586720 transitions. [2021-03-11 00:19:57,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-11 00:19:57,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-03-11 00:19:57,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:19:57,645 INFO L225 Difference]: With dead ends: 203904 [2021-03-11 00:19:57,645 INFO L226 Difference]: Without dead ends: 203764 [2021-03-11 00:19:57,645 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 474.4ms TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2021-03-11 00:19:57,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203764 states. [2021-03-11 00:20:01,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203764 to 182041. [2021-03-11 00:20:01,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182041 states, 182040 states have (on average 2.890210942649967) internal successors, (526134), 182040 states have internal predecessors, (526134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:02,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182041 states to 182041 states and 526134 transitions. [2021-03-11 00:20:02,023 INFO L78 Accepts]: Start accepts. Automaton has 182041 states and 526134 transitions. Word has length 43 [2021-03-11 00:20:02,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:02,023 INFO L480 AbstractCegarLoop]: Abstraction has 182041 states and 526134 transitions. [2021-03-11 00:20:02,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:02,023 INFO L276 IsEmpty]: Start isEmpty. Operand 182041 states and 526134 transitions. [2021-03-11 00:20:02,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:20:02,316 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:02,316 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:02,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-03-11 00:20:02,517 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:02,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:02,517 INFO L82 PathProgramCache]: Analyzing trace with hash 993831136, now seen corresponding path program 200 times [2021-03-11 00:20:02,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:02,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423061810] [2021-03-11 00:20:02,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:02,752 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:02,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423061810] [2021-03-11 00:20:02,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955731896] [2021-03-11 00:20:02,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:03,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:20:03,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:03,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:20:03,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:03,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:03,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 22 [2021-03-11 00:20:03,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783010978] [2021-03-11 00:20:03,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:20:03,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:03,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:20:03,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:20:03,835 INFO L87 Difference]: Start difference. First operand 182041 states and 526134 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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) [2021-03-11 00:20:05,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:05,028 INFO L93 Difference]: Finished difference Result 248139 states and 714731 transitions. [2021-03-11 00:20:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:20:05,029 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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 46 [2021-03-11 00:20:05,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:05,601 INFO L225 Difference]: With dead ends: 248139 [2021-03-11 00:20:05,601 INFO L226 Difference]: Without dead ends: 248101 [2021-03-11 00:20:05,601 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 464.9ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:20:06,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248101 states. [2021-03-11 00:20:09,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248101 to 182069. [2021-03-11 00:20:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182069 states, 182068 states have (on average 2.890096008084891) internal successors, (526194), 182068 states have internal predecessors, (526194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:10,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182069 states to 182069 states and 526194 transitions. [2021-03-11 00:20:10,985 INFO L78 Accepts]: Start accepts. Automaton has 182069 states and 526194 transitions. Word has length 46 [2021-03-11 00:20:10,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:10,985 INFO L480 AbstractCegarLoop]: Abstraction has 182069 states and 526194 transitions. [2021-03-11 00:20:10,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 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) [2021-03-11 00:20:10,985 INFO L276 IsEmpty]: Start isEmpty. Operand 182069 states and 526194 transitions. [2021-03-11 00:20:11,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:20:11,312 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:11,312 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:11,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable299,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:11,513 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:11,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:11,513 INFO L82 PathProgramCache]: Analyzing trace with hash -290942774, now seen corresponding path program 201 times [2021-03-11 00:20:11,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:11,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706561897] [2021-03-11 00:20:11,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:11,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:11,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706561897] [2021-03-11 00:20:11,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658569068] [2021-03-11 00:20:11,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:11,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-11 00:20:11,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:11,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:20:11,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:12,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:12,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-03-11 00:20:12,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607429525] [2021-03-11 00:20:12,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:20:12,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:12,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:20:12,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:20:12,002 INFO L87 Difference]: Start difference. First operand 182069 states and 526194 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:14,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:14,514 INFO L93 Difference]: Finished difference Result 270945 states and 781071 transitions. [2021-03-11 00:20:14,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:20:14,515 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-11 00:20:14,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:15,155 INFO L225 Difference]: With dead ends: 270945 [2021-03-11 00:20:15,155 INFO L226 Difference]: Without dead ends: 270863 [2021-03-11 00:20:15,155 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 553.2ms TimeCoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:20:15,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270863 states. [2021-03-11 00:20:19,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270863 to 202438. [2021-03-11 00:20:20,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202438 states, 202437 states have (on average 2.8933544757134317) internal successors, (585722), 202437 states have internal predecessors, (585722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:20,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202438 states to 202438 states and 585722 transitions. [2021-03-11 00:20:20,861 INFO L78 Accepts]: Start accepts. Automaton has 202438 states and 585722 transitions. Word has length 46 [2021-03-11 00:20:20,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:20,862 INFO L480 AbstractCegarLoop]: Abstraction has 202438 states and 585722 transitions. [2021-03-11 00:20:20,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:20,862 INFO L276 IsEmpty]: Start isEmpty. Operand 202438 states and 585722 transitions. [2021-03-11 00:20:21,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:20:21,155 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:21,155 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:21,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-03-11 00:20:21,356 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:21,356 INFO L82 PathProgramCache]: Analyzing trace with hash 305163142, now seen corresponding path program 202 times [2021-03-11 00:20:21,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:21,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914415636] [2021-03-11 00:20:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:21,536 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:21,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914415636] [2021-03-11 00:20:21,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279525968] [2021-03-11 00:20:21,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:21,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:20:21,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:21,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:20:21,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:21,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:21,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-03-11 00:20:21,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206627981] [2021-03-11 00:20:21,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:20:21,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:21,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:20:21,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:20:21,842 INFO L87 Difference]: Start difference. First operand 202438 states and 585722 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:24,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:24,172 INFO L93 Difference]: Finished difference Result 270914 states and 781003 transitions. [2021-03-11 00:20:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:20:24,173 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-11 00:20:24,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:24,813 INFO L225 Difference]: With dead ends: 270914 [2021-03-11 00:20:24,813 INFO L226 Difference]: Without dead ends: 270802 [2021-03-11 00:20:24,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 551.7ms TimeCoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2021-03-11 00:20:25,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270802 states. [2021-03-11 00:20:29,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270802 to 199094. [2021-03-11 00:20:29,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199094 states, 199093 states have (on average 2.890920323667834) internal successors, (575562), 199093 states have internal predecessors, (575562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:30,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199094 states to 199094 states and 575562 transitions. [2021-03-11 00:20:30,377 INFO L78 Accepts]: Start accepts. Automaton has 199094 states and 575562 transitions. Word has length 46 [2021-03-11 00:20:30,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:30,377 INFO L480 AbstractCegarLoop]: Abstraction has 199094 states and 575562 transitions. [2021-03-11 00:20:30,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:30,377 INFO L276 IsEmpty]: Start isEmpty. Operand 199094 states and 575562 transitions. [2021-03-11 00:20:30,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:20:30,690 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:30,690 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:30,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-03-11 00:20:30,894 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:30,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:30,894 INFO L82 PathProgramCache]: Analyzing trace with hash -752360386, now seen corresponding path program 203 times [2021-03-11 00:20:30,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:30,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669521122] [2021-03-11 00:20:30,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:31,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669521122] [2021-03-11 00:20:31,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527898914] [2021-03-11 00:20:31,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:31,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-11 00:20:31,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:31,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:20:31,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:31,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:31,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-11 00:20:31,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51123201] [2021-03-11 00:20:31,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:20:31,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:31,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:20:31,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:20:31,381 INFO L87 Difference]: Start difference. First operand 199094 states and 575562 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:33,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:33,598 INFO L93 Difference]: Finished difference Result 271089 states and 781313 transitions. [2021-03-11 00:20:33,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-11 00:20:33,599 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-11 00:20:33,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:34,218 INFO L225 Difference]: With dead ends: 271089 [2021-03-11 00:20:34,219 INFO L226 Difference]: Without dead ends: 270965 [2021-03-11 00:20:34,219 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 461.4ms TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:20:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270965 states. [2021-03-11 00:20:39,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270965 to 200986. [2021-03-11 00:20:39,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200986 states, 200985 states have (on average 2.8915192676070354) internal successors, (581152), 200985 states have internal predecessors, (581152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200986 states to 200986 states and 581152 transitions. [2021-03-11 00:20:40,800 INFO L78 Accepts]: Start accepts. Automaton has 200986 states and 581152 transitions. Word has length 46 [2021-03-11 00:20:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:40,800 INFO L480 AbstractCegarLoop]: Abstraction has 200986 states and 581152 transitions. [2021-03-11 00:20:40,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 200986 states and 581152 transitions. [2021-03-11 00:20:41,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:20:41,088 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:41,088 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:41,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-03-11 00:20:41,288 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:41,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:41,289 INFO L82 PathProgramCache]: Analyzing trace with hash 426214436, now seen corresponding path program 204 times [2021-03-11 00:20:41,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:41,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010731945] [2021-03-11 00:20:41,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:41,497 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:41,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010731945] [2021-03-11 00:20:41,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105745649] [2021-03-11 00:20:41,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:41,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:20:41,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:20:41,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:20:41,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:41,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:41,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-03-11 00:20:41,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520578349] [2021-03-11 00:20:41,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:20:41,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:41,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:20:41,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:20:41,804 INFO L87 Difference]: Start difference. First operand 200986 states and 581152 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:44,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:44,008 INFO L93 Difference]: Finished difference Result 271554 states and 782535 transitions. [2021-03-11 00:20:44,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-11 00:20:44,009 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-11 00:20:44,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:44,647 INFO L225 Difference]: With dead ends: 271554 [2021-03-11 00:20:44,647 INFO L226 Difference]: Without dead ends: 271424 [2021-03-11 00:20:44,647 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 440.9ms TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2021-03-11 00:20:44,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271424 states. [2021-03-11 00:20:49,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271424 to 202610. [2021-03-11 00:20:49,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202610 states, 202609 states have (on average 2.8921716212014275) internal successors, (585980), 202609 states have internal predecessors, (585980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:50,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202610 states to 202610 states and 585980 transitions. [2021-03-11 00:20:50,160 INFO L78 Accepts]: Start accepts. Automaton has 202610 states and 585980 transitions. Word has length 46 [2021-03-11 00:20:50,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:50,160 INFO L480 AbstractCegarLoop]: Abstraction has 202610 states and 585980 transitions. [2021-03-11 00:20:50,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:50,160 INFO L276 IsEmpty]: Start isEmpty. Operand 202610 states and 585980 transitions. [2021-03-11 00:20:50,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:20:50,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:50,451 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:50,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2021-03-11 00:20:50,652 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:50,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:50,652 INFO L82 PathProgramCache]: Analyzing trace with hash -8908162, now seen corresponding path program 205 times [2021-03-11 00:20:50,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:50,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704125363] [2021-03-11 00:20:50,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:50,859 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:50,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704125363] [2021-03-11 00:20:50,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309257389] [2021-03-11 00:20:50,859 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:20:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:50,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:20:50,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:20:51,137 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:51,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:20:51,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-03-11 00:20:51,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108117973] [2021-03-11 00:20:51,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:20:51,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:20:51,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:20:51,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:20:51,138 INFO L87 Difference]: Start difference. First operand 202610 states and 585980 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:20:53,113 INFO L93 Difference]: Finished difference Result 271538 states and 782566 transitions. [2021-03-11 00:20:53,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:20:53,114 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-11 00:20:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:20:53,761 INFO L225 Difference]: With dead ends: 271538 [2021-03-11 00:20:53,761 INFO L226 Difference]: Without dead ends: 271462 [2021-03-11 00:20:53,761 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:20:54,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271462 states. [2021-03-11 00:20:58,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271462 to 203498. [2021-03-11 00:20:58,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203498 states, 203497 states have (on average 2.892209713165305) internal successors, (588556), 203497 states have internal predecessors, (588556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:59,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203498 states to 203498 states and 588556 transitions. [2021-03-11 00:20:59,293 INFO L78 Accepts]: Start accepts. Automaton has 203498 states and 588556 transitions. Word has length 46 [2021-03-11 00:20:59,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:20:59,293 INFO L480 AbstractCegarLoop]: Abstraction has 203498 states and 588556 transitions. [2021-03-11 00:20:59,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:20:59,294 INFO L276 IsEmpty]: Start isEmpty. Operand 203498 states and 588556 transitions. [2021-03-11 00:20:59,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:20:59,572 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:20:59,572 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:20:59,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2021-03-11 00:20:59,772 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:20:59,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:20:59,773 INFO L82 PathProgramCache]: Analyzing trace with hash -534925852, now seen corresponding path program 206 times [2021-03-11 00:20:59,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:20:59,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649138131] [2021-03-11 00:20:59,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:20:59,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:20:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:20:59,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649138131] [2021-03-11 00:20:59,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810859219] [2021-03-11 00:20:59,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:00,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:21:00,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:00,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:21:00,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:00,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:00,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-03-11 00:21:00,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294908834] [2021-03-11 00:21:00,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:21:00,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:00,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:21:00,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:21:00,297 INFO L87 Difference]: Start difference. First operand 203498 states and 588556 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:02,358 INFO L93 Difference]: Finished difference Result 271399 states and 782277 transitions. [2021-03-11 00:21:02,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-11 00:21:02,359 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-11 00:21:02,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:03,056 INFO L225 Difference]: With dead ends: 271399 [2021-03-11 00:21:03,056 INFO L226 Difference]: Without dead ends: 271361 [2021-03-11 00:21:03,056 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 403.8ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:21:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271361 states. [2021-03-11 00:21:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271361 to 203520. [2021-03-11 00:21:07,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203520 states, 203519 states have (on average 2.8922164515352375) internal successors, (588621), 203519 states have internal predecessors, (588621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203520 states to 203520 states and 588621 transitions. [2021-03-11 00:21:08,693 INFO L78 Accepts]: Start accepts. Automaton has 203520 states and 588621 transitions. Word has length 46 [2021-03-11 00:21:08,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:08,693 INFO L480 AbstractCegarLoop]: Abstraction has 203520 states and 588621 transitions. [2021-03-11 00:21:08,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:08,694 INFO L276 IsEmpty]: Start isEmpty. Operand 203520 states and 588621 transitions. [2021-03-11 00:21:09,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:21:09,007 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:09,007 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:09,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable311,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:09,208 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:09,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:09,208 INFO L82 PathProgramCache]: Analyzing trace with hash 250764184, now seen corresponding path program 207 times [2021-03-11 00:21:09,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:09,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097761178] [2021-03-11 00:21:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:09,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:09,391 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:09,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097761178] [2021-03-11 00:21:09,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643102970] [2021-03-11 00:21:09,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:09,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-11 00:21:09,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:09,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:21:09,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:09,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:09,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2021-03-11 00:21:09,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909090536] [2021-03-11 00:21:09,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-11 00:21:09,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:09,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-11 00:21:09,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:21:09,728 INFO L87 Difference]: Start difference. First operand 203520 states and 588621 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:12,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:12,006 INFO L93 Difference]: Finished difference Result 252696 states and 730460 transitions. [2021-03-11 00:21:12,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-11 00:21:12,007 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-11 00:21:12,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:12,592 INFO L225 Difference]: With dead ends: 252696 [2021-03-11 00:21:12,592 INFO L226 Difference]: Without dead ends: 252590 [2021-03-11 00:21:12,592 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 548.4ms TimeCoverageRelationStatistics Valid=132, Invalid=1128, Unknown=0, NotChecked=0, Total=1260 [2021-03-11 00:21:13,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252590 states. [2021-03-11 00:21:17,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252590 to 237270. [2021-03-11 00:21:17,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237270 states, 237269 states have (on average 2.8979596997500727) internal successors, (687596), 237269 states have internal predecessors, (687596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237270 states to 237270 states and 687596 transitions. [2021-03-11 00:21:18,269 INFO L78 Accepts]: Start accepts. Automaton has 237270 states and 687596 transitions. Word has length 46 [2021-03-11 00:21:18,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:18,269 INFO L480 AbstractCegarLoop]: Abstraction has 237270 states and 687596 transitions. [2021-03-11 00:21:18,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:18,269 INFO L276 IsEmpty]: Start isEmpty. Operand 237270 states and 687596 transitions. [2021-03-11 00:21:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:21:19,602 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:19,602 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:19,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2021-03-11 00:21:19,802 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:19,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:19,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1527268248, now seen corresponding path program 208 times [2021-03-11 00:21:19,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:19,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937757831] [2021-03-11 00:21:19,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:19,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937757831] [2021-03-11 00:21:19,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730077875] [2021-03-11 00:21:19,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:19,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:21:19,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:19,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:21:19,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:20,297 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:20,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:20,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-03-11 00:21:20,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614606895] [2021-03-11 00:21:20,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:21:20,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:20,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:21:20,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:21:20,298 INFO L87 Difference]: Start difference. First operand 237270 states and 687596 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:22,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:22,581 INFO L93 Difference]: Finished difference Result 255213 states and 737547 transitions. [2021-03-11 00:21:22,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:21:22,582 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-11 00:21:22,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:23,203 INFO L225 Difference]: With dead ends: 255213 [2021-03-11 00:21:23,203 INFO L226 Difference]: Without dead ends: 255089 [2021-03-11 00:21:23,203 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 521.6ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:21:23,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255089 states. [2021-03-11 00:21:27,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255089 to 233794. [2021-03-11 00:21:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233794 states, 233793 states have (on average 2.8954160304200727) internal successors, (676928), 233793 states have internal predecessors, (676928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:28,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233794 states to 233794 states and 676928 transitions. [2021-03-11 00:21:28,980 INFO L78 Accepts]: Start accepts. Automaton has 233794 states and 676928 transitions. Word has length 46 [2021-03-11 00:21:28,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:28,980 INFO L480 AbstractCegarLoop]: Abstraction has 233794 states and 676928 transitions. [2021-03-11 00:21:28,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:28,980 INFO L276 IsEmpty]: Start isEmpty. Operand 233794 states and 676928 transitions. [2021-03-11 00:21:29,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:21:29,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:29,364 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:29,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:29,565 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:29,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:29,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1217093792, now seen corresponding path program 209 times [2021-03-11 00:21:29,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:29,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107639323] [2021-03-11 00:21:29,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:29,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107639323] [2021-03-11 00:21:29,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434338769] [2021-03-11 00:21:29,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:29,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-11 00:21:29,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:29,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:21:29,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:30,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:30,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-03-11 00:21:30,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814820327] [2021-03-11 00:21:30,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:21:30,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:30,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:21:30,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:21:30,060 INFO L87 Difference]: Start difference. First operand 233794 states and 676928 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:32,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:32,857 INFO L93 Difference]: Finished difference Result 250467 states and 723146 transitions. [2021-03-11 00:21:32,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:21:32,858 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-11 00:21:32,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:33,758 INFO L225 Difference]: With dead ends: 250467 [2021-03-11 00:21:33,758 INFO L226 Difference]: Without dead ends: 250336 [2021-03-11 00:21:33,758 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 582.3ms TimeCoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:21:34,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250336 states. [2021-03-11 00:21:38,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250336 to 231860. [2021-03-11 00:21:38,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231860 states, 231859 states have (on average 2.8944617202696468) internal successors, (671107), 231859 states have internal predecessors, (671107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:39,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231860 states to 231860 states and 671107 transitions. [2021-03-11 00:21:39,732 INFO L78 Accepts]: Start accepts. Automaton has 231860 states and 671107 transitions. Word has length 46 [2021-03-11 00:21:39,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:39,732 INFO L480 AbstractCegarLoop]: Abstraction has 231860 states and 671107 transitions. [2021-03-11 00:21:39,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:39,732 INFO L276 IsEmpty]: Start isEmpty. Operand 231860 states and 671107 transitions. [2021-03-11 00:21:40,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:21:40,140 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:40,140 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:40,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:40,340 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:40,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1861204456, now seen corresponding path program 210 times [2021-03-11 00:21:40,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:40,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503364845] [2021-03-11 00:21:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:40,516 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:40,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503364845] [2021-03-11 00:21:40,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894323504] [2021-03-11 00:21:40,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:40,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-11 00:21:40,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:21:40,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:21:40,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:40,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:40,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23 [2021-03-11 00:21:40,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352857649] [2021-03-11 00:21:40,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:21:40,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:40,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:21:40,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:21:40,845 INFO L87 Difference]: Start difference. First operand 231860 states and 671107 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:43,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:43,259 INFO L93 Difference]: Finished difference Result 247378 states and 714117 transitions. [2021-03-11 00:21:43,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:21:43,260 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-11 00:21:43,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:43,828 INFO L225 Difference]: With dead ends: 247378 [2021-03-11 00:21:43,828 INFO L226 Difference]: Without dead ends: 247224 [2021-03-11 00:21:43,829 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1332.5ms TimeCoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:21:44,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247224 states. [2021-03-11 00:21:48,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247224 to 231140. [2021-03-11 00:21:48,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231140 states, 231139 states have (on average 2.894349287658076) internal successors, (668997), 231139 states have internal predecessors, (668997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231140 states to 231140 states and 668997 transitions. [2021-03-11 00:21:50,387 INFO L78 Accepts]: Start accepts. Automaton has 231140 states and 668997 transitions. Word has length 46 [2021-03-11 00:21:50,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:21:50,387 INFO L480 AbstractCegarLoop]: Abstraction has 231140 states and 668997 transitions. [2021-03-11 00:21:50,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 231140 states and 668997 transitions. [2021-03-11 00:21:50,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:21:50,883 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:21:50,883 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:21:51,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:51,083 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:21:51,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:21:51,084 INFO L82 PathProgramCache]: Analyzing trace with hash -648117152, now seen corresponding path program 211 times [2021-03-11 00:21:51,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:21:51,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151607203] [2021-03-11 00:21:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:21:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:51,300 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:51,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151607203] [2021-03-11 00:21:51,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324216474] [2021-03-11 00:21:51,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:21:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:21:51,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:21:51,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:21:51,610 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:21:51,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:21:51,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 22 [2021-03-11 00:21:51,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682709300] [2021-03-11 00:21:51,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-11 00:21:51,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:21:51,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-11 00:21:51,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-03-11 00:21:51,611 INFO L87 Difference]: Start difference. First operand 231140 states and 668997 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:21:53,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:21:53,685 INFO L93 Difference]: Finished difference Result 246311 states and 711077 transitions. [2021-03-11 00:21:53,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-11 00:21:53,686 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-11 00:21:53,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:21:54,319 INFO L225 Difference]: With dead ends: 246311 [2021-03-11 00:21:54,319 INFO L226 Difference]: Without dead ends: 246235 [2021-03-11 00:21:54,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 419.1ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:21:54,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246235 states. [2021-03-11 00:21:58,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246235 to 230378. [2021-03-11 00:21:58,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230378 states, 230377 states have (on average 2.8942732998519816) internal successors, (666774), 230377 states have internal predecessors, (666774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:00,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230378 states to 230378 states and 666774 transitions. [2021-03-11 00:22:00,221 INFO L78 Accepts]: Start accepts. Automaton has 230378 states and 666774 transitions. Word has length 46 [2021-03-11 00:22:00,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:00,222 INFO L480 AbstractCegarLoop]: Abstraction has 230378 states and 666774 transitions. [2021-03-11 00:22:00,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:00,222 INFO L276 IsEmpty]: Start isEmpty. Operand 230378 states and 666774 transitions. [2021-03-11 00:22:00,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:22:00,612 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:00,612 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:00,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-03-11 00:22:00,812 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:00,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:00,813 INFO L82 PathProgramCache]: Analyzing trace with hash 580927768, now seen corresponding path program 212 times [2021-03-11 00:22:00,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:00,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499339380] [2021-03-11 00:22:00,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:01,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499339380] [2021-03-11 00:22:01,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956984301] [2021-03-11 00:22:01,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:01,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-11 00:22:01,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:01,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:22:01,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:01,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:01,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 24 [2021-03-11 00:22:01,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944397134] [2021-03-11 00:22:01,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-11 00:22:01,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:01,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-11 00:22:01,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-03-11 00:22:01,366 INFO L87 Difference]: Start difference. First operand 230378 states and 666774 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:03,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:03,595 INFO L93 Difference]: Finished difference Result 246237 states and 710860 transitions. [2021-03-11 00:22:03,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:22:03,596 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-11 00:22:03,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:04,192 INFO L225 Difference]: With dead ends: 246237 [2021-03-11 00:22:04,192 INFO L226 Difference]: Without dead ends: 246161 [2021-03-11 00:22:04,192 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 621.8ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:04,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246161 states. [2021-03-11 00:22:09,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246161 to 231129. [2021-03-11 00:22:09,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231129 states, 231128 states have (on average 2.894201481430203) internal successors, (668931), 231128 states have internal predecessors, (668931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:10,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231129 states to 231129 states and 668931 transitions. [2021-03-11 00:22:10,085 INFO L78 Accepts]: Start accepts. Automaton has 231129 states and 668931 transitions. Word has length 46 [2021-03-11 00:22:10,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:10,085 INFO L480 AbstractCegarLoop]: Abstraction has 231129 states and 668931 transitions. [2021-03-11 00:22:10,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:10,086 INFO L276 IsEmpty]: Start isEmpty. Operand 231129 states and 668931 transitions. [2021-03-11 00:22:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:22:10,557 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:10,557 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:10,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-03-11 00:22:10,758 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:10,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:10,758 INFO L82 PathProgramCache]: Analyzing trace with hash 372500588, now seen corresponding path program 213 times [2021-03-11 00:22:10,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:10,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097489364] [2021-03-11 00:22:10,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:11,907 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:11,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097489364] [2021-03-11 00:22:11,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672412863] [2021-03-11 00:22:11,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:11,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-11 00:22:11,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:11,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:22:11,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:12,301 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:12,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:12,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 25 [2021-03-11 00:22:12,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742913822] [2021-03-11 00:22:12,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-11 00:22:12,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:12,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-11 00:22:12,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-03-11 00:22:12,302 INFO L87 Difference]: Start difference. First operand 231129 states and 668931 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:14,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:14,446 INFO L93 Difference]: Finished difference Result 270239 states and 783485 transitions. [2021-03-11 00:22:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-11 00:22:14,460 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-11 00:22:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:15,098 INFO L225 Difference]: With dead ends: 270239 [2021-03-11 00:22:15,098 INFO L226 Difference]: Without dead ends: 270117 [2021-03-11 00:22:15,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1497.9ms TimeCoverageRelationStatistics Valid=124, Invalid=1066, Unknown=0, NotChecked=0, Total=1190 [2021-03-11 00:22:15,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270117 states. [2021-03-11 00:22:20,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270117 to 269291. [2021-03-11 00:22:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269291 states, 269290 states have (on average 2.90108804634409) internal successors, (781234), 269290 states have internal predecessors, (781234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269291 states to 269291 states and 781234 transitions. [2021-03-11 00:22:21,384 INFO L78 Accepts]: Start accepts. Automaton has 269291 states and 781234 transitions. Word has length 46 [2021-03-11 00:22:21,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:21,384 INFO L480 AbstractCegarLoop]: Abstraction has 269291 states and 781234 transitions. [2021-03-11 00:22:21,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:21,384 INFO L276 IsEmpty]: Start isEmpty. Operand 269291 states and 781234 transitions. [2021-03-11 00:22:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:22:22,757 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:22,757 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:22,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:22,957 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:22,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:22,958 INFO L82 PathProgramCache]: Analyzing trace with hash -850429848, now seen corresponding path program 214 times [2021-03-11 00:22:22,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:22,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717640961] [2021-03-11 00:22:22,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:23,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717640961] [2021-03-11 00:22:23,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732214726] [2021-03-11 00:22:23,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:23,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-11 00:22:23,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:23,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:22:23,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:23,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:23,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 23 [2021-03-11 00:22:23,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601323310] [2021-03-11 00:22:23,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:22:23,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:23,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:22:23,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:22:23,457 INFO L87 Difference]: Start difference. First operand 269291 states and 781234 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:25,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:25,622 INFO L93 Difference]: Finished difference Result 272736 states and 790490 transitions. [2021-03-11 00:22:25,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-11 00:22:25,624 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-11 00:22:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:26,285 INFO L225 Difference]: With dead ends: 272736 [2021-03-11 00:22:26,286 INFO L226 Difference]: Without dead ends: 272606 [2021-03-11 00:22:26,286 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 488.3ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:26,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272606 states. [2021-03-11 00:22:32,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272606 to 266635. [2021-03-11 00:22:32,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266635 states, 266634 states have (on average 2.8985200687084167) internal successors, (772844), 266634 states have internal predecessors, (772844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:33,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266635 states to 266635 states and 772844 transitions. [2021-03-11 00:22:33,859 INFO L78 Accepts]: Start accepts. Automaton has 266635 states and 772844 transitions. Word has length 46 [2021-03-11 00:22:33,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:33,859 INFO L480 AbstractCegarLoop]: Abstraction has 266635 states and 772844 transitions. [2021-03-11 00:22:33,859 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 266635 states and 772844 transitions. [2021-03-11 00:22:35,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:22:35,283 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:35,283 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:35,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-03-11 00:22:35,485 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:35,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:35,486 INFO L82 PathProgramCache]: Analyzing trace with hash -454634690, now seen corresponding path program 215 times [2021-03-11 00:22:35,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:35,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753618968] [2021-03-11 00:22:35,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:35,633 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:35,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753618968] [2021-03-11 00:22:35,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591847209] [2021-03-11 00:22:35,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:35,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-11 00:22:35,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:35,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-11 00:22:35,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:35,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:35,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 23 [2021-03-11 00:22:35,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996346870] [2021-03-11 00:22:35,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:22:35,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:35,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:22:35,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:22:35,975 INFO L87 Difference]: Start difference. First operand 266635 states and 772844 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:38,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:38,072 INFO L93 Difference]: Finished difference Result 269030 states and 778880 transitions. [2021-03-11 00:22:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-11 00:22:38,073 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-11 00:22:38,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:38,668 INFO L225 Difference]: With dead ends: 269030 [2021-03-11 00:22:38,669 INFO L226 Difference]: Without dead ends: 268899 [2021-03-11 00:22:38,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 447.9ms TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2021-03-11 00:22:38,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268899 states. [2021-03-11 00:22:43,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268899 to 263749. [2021-03-11 00:22:43,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263749 states, 263748 states have (on average 2.898558472481308) internal successors, (764489), 263748 states have internal predecessors, (764489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:44,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263749 states to 263749 states and 764489 transitions. [2021-03-11 00:22:44,407 INFO L78 Accepts]: Start accepts. Automaton has 263749 states and 764489 transitions. Word has length 46 [2021-03-11 00:22:44,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:44,407 INFO L480 AbstractCegarLoop]: Abstraction has 263749 states and 764489 transitions. [2021-03-11 00:22:44,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:44,407 INFO L276 IsEmpty]: Start isEmpty. Operand 263749 states and 764489 transitions. [2021-03-11 00:22:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:22:45,714 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:45,714 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:45,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:45,915 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:45,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:45,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1743048966, now seen corresponding path program 216 times [2021-03-11 00:22:45,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:45,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245454818] [2021-03-11 00:22:45,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:46,076 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:46,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245454818] [2021-03-11 00:22:46,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977590038] [2021-03-11 00:22:46,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:46,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-11 00:22:46,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-11 00:22:46,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-11 00:22:46,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:46,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:46,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 23 [2021-03-11 00:22:46,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209289346] [2021-03-11 00:22:46,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:22:46,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:46,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:22:46,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:22:46,460 INFO L87 Difference]: Start difference. First operand 263749 states and 764489 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:48,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:48,571 INFO L93 Difference]: Finished difference Result 264954 states and 767363 transitions. [2021-03-11 00:22:48,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-11 00:22:48,572 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-11 00:22:48,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:49,147 INFO L225 Difference]: With dead ends: 264954 [2021-03-11 00:22:49,147 INFO L226 Difference]: Without dead ends: 264824 [2021-03-11 00:22:49,148 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 566.8ms TimeCoverageRelationStatistics Valid=114, Invalid=942, Unknown=0, NotChecked=0, Total=1056 [2021-03-11 00:22:49,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264824 states. [2021-03-11 00:22:53,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264824 to 261525. [2021-03-11 00:22:54,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261525 states, 261524 states have (on average 2.8981470151878987) internal successors, (757935), 261524 states have internal predecessors, (757935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261525 states to 261525 states and 757935 transitions. [2021-03-11 00:22:54,906 INFO L78 Accepts]: Start accepts. Automaton has 261525 states and 757935 transitions. Word has length 46 [2021-03-11 00:22:54,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-11 00:22:54,906 INFO L480 AbstractCegarLoop]: Abstraction has 261525 states and 757935 transitions. [2021-03-11 00:22:54,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:54,907 INFO L276 IsEmpty]: Start isEmpty. Operand 261525 states and 757935 transitions. [2021-03-11 00:22:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-03-11 00:22:56,162 INFO L511 BasicCegarLoop]: Found error trace [2021-03-11 00:22:56,162 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 00:22:56,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:56,384 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 00:22:56,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 00:22:56,384 INFO L82 PathProgramCache]: Analyzing trace with hash 455384638, now seen corresponding path program 217 times [2021-03-11 00:22:56,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 00:22:56,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494876617] [2021-03-11 00:22:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 00:22:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:56,599 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:56,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494876617] [2021-03-11 00:22:56,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525138902] [2021-03-11 00:22:56,599 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-11 00:22:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 00:22:56,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-03-11 00:22:56,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-11 00:22:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 00:22:56,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-11 00:22:56,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 23 [2021-03-11 00:22:56,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640363597] [2021-03-11 00:22:56,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-11 00:22:56,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 00:22:56,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-11 00:22:56,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-11 00:22:56,926 INFO L87 Difference]: Start difference. First operand 261525 states and 757935 transitions. Second operand has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 00:22:58,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-11 00:22:58,910 INFO L93 Difference]: Finished difference Result 264747 states and 767007 transitions. [2021-03-11 00:22:58,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-11 00:22:58,928 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0) internal successors, (72), 23 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-03-11 00:22:58,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-11 00:22:59,531 INFO L225 Difference]: With dead ends: 264747 [2021-03-11 00:22:59,531 INFO L226 Difference]: Without dead ends: 264671 [2021-03-11 00:22:59,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 Received shutdown request... [2021-03-11 00:22:59,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264671 states. [2021-03-11 00:23:00,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-03-11 00:23:00,003 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-11 00:23:00,006 WARN L224 ceAbstractionStarter]: Timeout [2021-03-11 00:23:00,006 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 12:23:00 BasicIcfg [2021-03-11 00:23:00,006 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 00:23:00,007 INFO L168 Benchmark]: Toolchain (without parser) took 693222.45 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.2 MB in the beginning and 10.4 GB in the end (delta: -10.2 GB). Peak memory consumption was 6.0 GB. Max. memory is 16.0 GB. [2021-03-11 00:23:00,007 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 255.9 MB. Free memory was 237.4 MB in the beginning and 237.3 MB in the end (delta: 92.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:23:00,007 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.02 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 00:23:00,007 INFO L168 Benchmark]: Boogie Preprocessor took 16.10 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.3 MB in the end (delta: 965.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 00:23:00,007 INFO L168 Benchmark]: RCFGBuilder took 298.93 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 235.5 MB in the end (delta: -2.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. [2021-03-11 00:23:00,007 INFO L168 Benchmark]: TraceAbstraction took 692872.74 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 235.0 MB in the beginning and 10.4 GB in the end (delta: -10.2 GB). Peak memory consumption was 6.0 GB. Max. memory is 16.0 GB. [2021-03-11 00:23:00,007 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 0.14 ms. Allocated memory is still 255.9 MB. Free memory was 237.4 MB in the beginning and 237.3 MB in the end (delta: 92.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.02 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.3 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.10 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 233.3 MB in the end (delta: 965.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 298.93 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 235.5 MB in the end (delta: -2.3 MB). Peak memory consumption was 17.8 MB. Max. memory is 16.0 GB. * TraceAbstraction took 692872.74 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 235.0 MB in the beginning and 10.4 GB in the end (delta: -10.2 GB). Peak memory consumption was 6.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 68). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 692784.5ms, OverallIterations: 235, TraceHistogramMax: 4, EmptinessCheckTime: 27493.7ms, AutomataDifference: 209980.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 65.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 21172 SDtfs, 43281 SDslu, 185932 SDs, 0 SdLazy, 84880 SolverSat, 4589 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 36089.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15526 GetRequests, 8872 SyntacticMatches, 172 SemanticMatches, 6482 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60516 ImplicationChecksByTransitivity, 78890.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=269291occurred in iteration=231, InterpolantAutomatonStates: 6085, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 339988.1ms AutomataMinimizationTime, 235 MinimizatonAttempts, 2242442 StatesRemovedByMinimization, 234 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 938.0ms SsaConstructionTime, 2559.3ms SatisfiabilityAnalysisTime, 61379.6ms InterpolantComputationTime, 17100 NumberOfCodeBlocks, 17097 NumberOfCodeBlocksAsserted, 873 NumberOfCheckSat, 16644 ConstructedInterpolants, 0 QuantifiedInterpolants, 126096 SizeOfPredicates, 975 NumberOfNonLiveVariables, 17799 ConjunctsInSsa, 4028 ConjunctsInUnsatCore, 456 InterpolantComputations, 14 PerfectInterpolantSequences, 2163/9394 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