/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 14:04:20,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 14:04:20,406 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 14:04:20,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 14:04:20,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 14:04:20,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 14:04:20,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 14:04:20,440 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 14:04:20,441 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 14:04:20,442 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 14:04:20,443 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 14:04:20,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 14:04:20,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 14:04:20,447 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 14:04:20,448 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 14:04:20,449 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 14:04:20,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 14:04:20,460 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 [2021-05-03 14:04:20,479 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 14:04:20,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 14:04:20,479 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 14:04:20,480 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 14:04:20,481 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 14:04:20,481 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 14:04:20,481 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 14:04:20,481 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 14:04:20,481 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 14:04:20,481 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 14:04:20,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 14:04:20,482 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 14:04:20,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 14:04:20,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 14:04:20,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 14:04:20,482 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 14:04:20,482 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 14:04:20,482 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 14:04:20,482 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 14:04:20,483 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 14:04:20,483 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 14:04:20,483 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 14:04:20,483 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 14:04:20,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 14:04:20,483 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 14:04:20,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 14:04:20,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 14:04:20,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 14:04:20,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 14:04:20,484 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 14:04:20,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 14:04:20,484 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 14:04:20,778 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 14:04:20,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 14:04:20,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 14:04:20,801 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 14:04:20,802 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 14:04:20,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl [2021-05-03 14:04:20,802 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-5.wvr.bpl' [2021-05-03 14:04:20,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 14:04:20,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 14:04:20,826 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 14:04:20,826 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 14:04:20,826 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 14:04:20,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:20" (1/1) ... [2021-05-03 14:04:20,843 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:20" (1/1) ... [2021-05-03 14:04:20,849 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 14:04:20,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 14:04:20,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 14:04:20,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 14:04:20,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:20" (1/1) ... [2021-05-03 14:04:20,858 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:20" (1/1) ... [2021-05-03 14:04:20,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:20" (1/1) ... [2021-05-03 14:04:20,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:20" (1/1) ... [2021-05-03 14:04:20,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:20" (1/1) ... [2021-05-03 14:04:20,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:20" (1/1) ... [2021-05-03 14:04:20,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:20" (1/1) ... [2021-05-03 14:04:20,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 14:04:20,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 14:04:20,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 14:04:20,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 14:04:20,867 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:20" (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 [2021-05-03 14:04:20,944 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 14:04:20,945 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 14:04:20,945 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 14:04:20,945 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 14:04:20,945 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 14:04:20,945 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 14:04:20,945 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 14:04:20,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 14:04:20,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 14:04:20,946 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 14:04:21,214 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 14:04:21,214 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-03 14:04:21,215 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-05-03 14:04:21,215 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-05-03 14:04:21,216 INFO L202 PluginConnector]: Adding new model unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:04:21 BoogieIcfgContainer [2021-05-03 14:04:21,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 14:04:21,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 14:04:21,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 14:04:21,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 14:04:21,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:20" (1/2) ... [2021-05-03 14:04:21,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72f8ac2e and model type unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 02:04:21, skipping insertion in model container [2021-05-03 14:04:21,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-5.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:04:21" (2/2) ... [2021-05-03 14:04:21,222 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.bpl [2021-05-03 14:04:21,227 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 14:04:21,227 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 14:04:21,230 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 14:04:21,230 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 14:04:21,266 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 14:04:21,277 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 14:04:21,291 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 14:04:21,291 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 14:04:21,291 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 14:04:21,291 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 14:04:21,292 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 14:04:21,292 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 14:04:21,292 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 14:04:21,292 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 14:04:21,299 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-05-03 14:04:21,306 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:21,308 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:21,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-03 14:04:21,312 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:21,313 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:21,313 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:21,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:21,317 INFO L82 PathProgramCache]: Analyzing trace with hash -551954567, now seen corresponding path program 1 times [2021-05-03 14:04:21,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:21,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449649682] [2021-05-03 14:04:21,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:21,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449649682] [2021-05-03 14:04:21,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:04:21,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-03 14:04:21,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66225982] [2021-05-03 14:04:21,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 14:04:21,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:21,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 14:04:21,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 14:04:21,445 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:21,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:21,462 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-05-03 14:04:21,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 14:04:21,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-05-03 14:04:21,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:21,470 INFO L225 Difference]: With dead ends: 22 [2021-05-03 14:04:21,470 INFO L226 Difference]: Without dead ends: 19 [2021-05-03 14:04:21,471 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 14:04:21,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-03 14:04:21,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-03 14:04:21,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:21,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-05-03 14:04:21,497 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-05-03 14:04:21,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:21,498 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-05-03 14:04:21,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:21,498 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-05-03 14:04:21,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-03 14:04:21,499 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:21,499 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:21,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 14:04:21,499 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:21,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:21,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1013287513, now seen corresponding path program 1 times [2021-05-03 14:04:21,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:21,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719034823] [2021-05-03 14:04:21,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:21,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:21,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719034823] [2021-05-03 14:04:21,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180069479] [2021-05-03 14:04:21,535 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 [2021-05-03 14:04:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:21,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 14:04:21,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:21,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:21,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-05-03 14:04:21,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299925556] [2021-05-03 14:04:21,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:04:21,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:21,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:04:21,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:04:21,675 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:21,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:21,720 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-05-03 14:04:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:04:21,720 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-05-03 14:04:21,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:21,722 INFO L225 Difference]: With dead ends: 28 [2021-05-03 14:04:21,722 INFO L226 Difference]: Without dead ends: 28 [2021-05-03 14:04:21,723 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:04:21,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-03 14:04:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-05-03 14:04:21,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:21,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-05-03 14:04:21,731 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-05-03 14:04:21,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:21,732 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-05-03 14:04:21,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:21,732 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-05-03 14:04:21,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-03 14:04:21,733 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:21,733 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:21,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-03 14:04:21,941 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:21,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:21,942 INFO L82 PathProgramCache]: Analyzing trace with hash 70002620, now seen corresponding path program 1 times [2021-05-03 14:04:21,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:21,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342855435] [2021-05-03 14:04:21,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:21,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:21,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342855435] [2021-05-03 14:04:21,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:04:21,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 14:04:21,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216174385] [2021-05-03 14:04:21,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:04:21,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:21,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:04:21,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:04:21,987 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:22,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:22,035 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-05-03 14:04:22,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:04:22,036 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-05-03 14:04:22,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:22,036 INFO L225 Difference]: With dead ends: 22 [2021-05-03 14:04:22,037 INFO L226 Difference]: Without dead ends: 18 [2021-05-03 14:04:22,037 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:04:22,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-03 14:04:22,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-03 14:04:22,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:22,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-05-03 14:04:22,040 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-05-03 14:04:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:22,040 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-05-03 14:04:22,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-05-03 14:04:22,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-03 14:04:22,041 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:22,041 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:22,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 14:04:22,041 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:22,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:22,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1649223530, now seen corresponding path program 2 times [2021-05-03 14:04:22,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:22,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163423528] [2021-05-03 14:04:22,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:22,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163423528] [2021-05-03 14:04:22,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:04:22,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 14:04:22,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297817652] [2021-05-03 14:04:22,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:04:22,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:22,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:04:22,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:04:22,095 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:22,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:22,118 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-05-03 14:04:22,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:04:22,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-05-03 14:04:22,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:22,120 INFO L225 Difference]: With dead ends: 20 [2021-05-03 14:04:22,120 INFO L226 Difference]: Without dead ends: 20 [2021-05-03 14:04:22,121 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:04:22,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-03 14:04:22,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-03 14:04:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-05-03 14:04:22,136 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-05-03 14:04:22,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:22,136 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-05-03 14:04:22,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:22,136 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-05-03 14:04:22,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 14:04:22,137 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:22,137 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:22,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 14:04:22,137 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:22,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:22,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1346416818, now seen corresponding path program 1 times [2021-05-03 14:04:22,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:22,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621342730] [2021-05-03 14:04:22,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:22,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621342730] [2021-05-03 14:04:22,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352930140] [2021-05-03 14:04:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:22,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:04:22,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:22,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:22,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-05-03 14:04:22,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756266342] [2021-05-03 14:04:22,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:04:22,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:22,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:04:22,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:04:22,309 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:22,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:22,332 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-05-03 14:04:22,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:04:22,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-05-03 14:04:22,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:22,333 INFO L225 Difference]: With dead ends: 24 [2021-05-03 14:04:22,333 INFO L226 Difference]: Without dead ends: 24 [2021-05-03 14:04:22,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:04:22,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-03 14:04:22,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-03 14:04:22,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:22,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-05-03 14:04:22,337 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-05-03 14:04:22,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:22,337 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-05-03 14:04:22,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:22,337 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-05-03 14:04:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:04:22,338 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:22,338 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:22,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:22,561 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:22,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:22,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1989220860, now seen corresponding path program 2 times [2021-05-03 14:04:22,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:22,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005651054] [2021-05-03 14:04:22,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:22,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:22,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005651054] [2021-05-03 14:04:22,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189764369] [2021-05-03 14:04:22,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:22,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:22,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:22,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 14:04:22,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:22,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:22,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-03 14:04:22,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228643411] [2021-05-03 14:04:22,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 14:04:22,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:22,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 14:04:22,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:04:22,716 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:22,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:22,743 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-05-03 14:04:22,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:04:22,744 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-05-03 14:04:22,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:22,744 INFO L225 Difference]: With dead ends: 28 [2021-05-03 14:04:22,745 INFO L226 Difference]: Without dead ends: 28 [2021-05-03 14:04:22,745 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:04:22,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-03 14:04:22,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-03 14:04:22,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:22,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-05-03 14:04:22,748 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-05-03 14:04:22,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:22,748 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-05-03 14:04:22,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:22,748 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-05-03 14:04:22,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:04:22,749 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:22,749 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:22,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:22,967 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:22,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:22,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1980193522, now seen corresponding path program 3 times [2021-05-03 14:04:22,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:22,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688618492] [2021-05-03 14:04:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:23,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688618492] [2021-05-03 14:04:23,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312003725] [2021-05-03 14:04:23,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:04:23,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:04:23,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:23,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:04:23,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:23,172 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:23,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:23,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-03 14:04:23,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940748036] [2021-05-03 14:04:23,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:23,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:23,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:23,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:23,173 INFO L87 Difference]: Start difference. First operand 28 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:23,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:23,216 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2021-05-03 14:04:23,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:04:23,218 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-05-03 14:04:23,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:23,220 INFO L225 Difference]: With dead ends: 32 [2021-05-03 14:04:23,220 INFO L226 Difference]: Without dead ends: 32 [2021-05-03 14:04:23,220 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:23,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-03 14:04:23,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-03 14:04:23,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2021-05-03 14:04:23,229 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2021-05-03 14:04:23,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:23,229 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2021-05-03 14:04:23,229 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:23,229 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-05-03 14:04:23,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:23,230 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:23,230 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:23,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:23,451 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:23,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:23,451 INFO L82 PathProgramCache]: Analyzing trace with hash -477987780, now seen corresponding path program 4 times [2021-05-03 14:04:23,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:23,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536800631] [2021-05-03 14:04:23,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:23,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536800631] [2021-05-03 14:04:23,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043521492] [2021-05-03 14:04:23,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:23,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:23,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:23,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:23,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:23,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:23,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-05-03 14:04:23,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389457286] [2021-05-03 14:04:23,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:23,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:23,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:23,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:23,659 INFO L87 Difference]: Start difference. First operand 32 states and 59 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:23,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:23,699 INFO L93 Difference]: Finished difference Result 36 states and 67 transitions. [2021-05-03 14:04:23,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 14:04:23,700 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-05-03 14:04:23,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:23,700 INFO L225 Difference]: With dead ends: 36 [2021-05-03 14:04:23,701 INFO L226 Difference]: Without dead ends: 36 [2021-05-03 14:04:23,701 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:23,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-03 14:04:23,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-05-03 14:04:23,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 35 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) [2021-05-03 14:04:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 67 transitions. [2021-05-03 14:04:23,704 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 67 transitions. Word has length 14 [2021-05-03 14:04:23,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:23,704 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 67 transitions. [2021-05-03 14:04:23,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:23,704 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 67 transitions. [2021-05-03 14:04:23,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:23,705 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:23,705 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:23,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:23,920 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:23,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:23,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1154250034, now seen corresponding path program 5 times [2021-05-03 14:04:23,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:23,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046016128] [2021-05-03 14:04:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:23,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:23,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046016128] [2021-05-03 14:04:23,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759406638] [2021-05-03 14:04:23,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:24,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:04:24,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:24,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:04:24,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:24,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:24,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:04:24,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:24,276 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:24,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:24,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:04:24,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:24,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:24,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-05-03 14:04:24,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382954393] [2021-05-03 14:04:24,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:24,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:24,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:24,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:24,283 INFO L87 Difference]: Start difference. First operand 36 states and 67 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:24,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:24,400 INFO L93 Difference]: Finished difference Result 93 states and 165 transitions. [2021-05-03 14:04:24,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:24,406 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:24,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:24,407 INFO L225 Difference]: With dead ends: 93 [2021-05-03 14:04:24,407 INFO L226 Difference]: Without dead ends: 90 [2021-05-03 14:04:24,407 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:24,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-03 14:04:24,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 49. [2021-05-03 14:04:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.2083333333333335) internal successors, (106), 48 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 106 transitions. [2021-05-03 14:04:24,423 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 106 transitions. Word has length 15 [2021-05-03 14:04:24,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:24,423 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 106 transitions. [2021-05-03 14:04:24,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:24,423 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 106 transitions. [2021-05-03 14:04:24,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:24,424 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:24,424 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:24,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:24,645 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:24,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:24,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1304076458, now seen corresponding path program 6 times [2021-05-03 14:04:24,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:24,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091573850] [2021-05-03 14:04:24,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:24,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:24,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091573850] [2021-05-03 14:04:24,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008424929] [2021-05-03 14:04:24,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:24,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:04:24,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:24,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:04:24,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:24,908 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:24,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:04:25,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:25,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:25,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:25,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:04:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:25,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:25,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-05-03 14:04:25,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530758058] [2021-05-03 14:04:25,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:25,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:25,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:25,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:25,068 INFO L87 Difference]: Start difference. First operand 49 states and 106 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:25,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:25,141 INFO L93 Difference]: Finished difference Result 103 states and 198 transitions. [2021-05-03 14:04:25,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:25,142 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:25,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:25,144 INFO L225 Difference]: With dead ends: 103 [2021-05-03 14:04:25,144 INFO L226 Difference]: Without dead ends: 100 [2021-05-03 14:04:25,144 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:25,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-03 14:04:25,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 57. [2021-05-03 14:04:25,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.4107142857142856) internal successors, (135), 56 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:25,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 135 transitions. [2021-05-03 14:04:25,161 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 135 transitions. Word has length 15 [2021-05-03 14:04:25,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:25,161 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 135 transitions. [2021-05-03 14:04:25,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:25,161 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 135 transitions. [2021-05-03 14:04:25,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:25,162 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:25,162 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:25,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:25,381 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:25,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:25,381 INFO L82 PathProgramCache]: Analyzing trace with hash 930031036, now seen corresponding path program 7 times [2021-05-03 14:04:25,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:25,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516656495] [2021-05-03 14:04:25,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:25,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:25,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516656495] [2021-05-03 14:04:25,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608137819] [2021-05-03 14:04:25,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:25,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:25,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:04:25,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:25,574 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:25,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:04:25,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:25,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:25,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:25,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:04:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:25,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:25,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-05-03 14:04:25,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471874677] [2021-05-03 14:04:25,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:25,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:25,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:25,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:25,655 INFO L87 Difference]: Start difference. First operand 57 states and 135 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:25,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:25,727 INFO L93 Difference]: Finished difference Result 113 states and 231 transitions. [2021-05-03 14:04:25,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:25,728 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:25,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:25,728 INFO L225 Difference]: With dead ends: 113 [2021-05-03 14:04:25,729 INFO L226 Difference]: Without dead ends: 110 [2021-05-03 14:04:25,729 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:25,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-03 14:04:25,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 66. [2021-05-03 14:04:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.5692307692307694) internal successors, (167), 65 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:25,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 167 transitions. [2021-05-03 14:04:25,733 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 167 transitions. Word has length 15 [2021-05-03 14:04:25,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:25,733 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 167 transitions. [2021-05-03 14:04:25,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:25,733 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 167 transitions. [2021-05-03 14:04:25,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:25,734 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:25,734 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:25,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:25,949 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:25,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:25,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1467886614, now seen corresponding path program 8 times [2021-05-03 14:04:25,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:25,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415844744] [2021-05-03 14:04:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:25,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:25,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415844744] [2021-05-03 14:04:25,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113942688] [2021-05-03 14:04:25,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:26,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:26,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:26,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:04:26,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:26,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:26,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:04:26,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:26,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:26,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:26,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:04:26,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:26,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:26,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-05-03 14:04:26,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208794160] [2021-05-03 14:04:26,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:26,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:26,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:26,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:26,223 INFO L87 Difference]: Start difference. First operand 66 states and 167 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:26,319 INFO L93 Difference]: Finished difference Result 124 states and 267 transitions. [2021-05-03 14:04:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:26,319 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:26,320 INFO L225 Difference]: With dead ends: 124 [2021-05-03 14:04:26,320 INFO L226 Difference]: Without dead ends: 121 [2021-05-03 14:04:26,321 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:26,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-05-03 14:04:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2021-05-03 14:04:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.6933333333333334) internal successors, (202), 75 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:26,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 202 transitions. [2021-05-03 14:04:26,330 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 202 transitions. Word has length 15 [2021-05-03 14:04:26,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:26,331 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 202 transitions. [2021-05-03 14:04:26,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:26,331 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 202 transitions. [2021-05-03 14:04:26,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:26,335 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:26,335 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:26,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:26,541 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:26,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:26,542 INFO L82 PathProgramCache]: Analyzing trace with hash 961540348, now seen corresponding path program 9 times [2021-05-03 14:04:26,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:26,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968260625] [2021-05-03 14:04:26,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:26,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:26,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968260625] [2021-05-03 14:04:26,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368613848] [2021-05-03 14:04:26,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:26,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:04:26,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:26,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:04:26,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:26,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:26,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:04:26,775 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:26,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:26,777 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:26,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:04:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:26,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:26,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-05-03 14:04:26,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033274687] [2021-05-03 14:04:26,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:26,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:26,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:26,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:26,785 INFO L87 Difference]: Start difference. First operand 76 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:26,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:26,875 INFO L93 Difference]: Finished difference Result 136 states and 306 transitions. [2021-05-03 14:04:26,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:26,875 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:26,876 INFO L225 Difference]: With dead ends: 136 [2021-05-03 14:04:26,876 INFO L226 Difference]: Without dead ends: 133 [2021-05-03 14:04:26,876 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-05-03 14:04:26,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 87. [2021-05-03 14:04:26,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 240 transitions. [2021-05-03 14:04:26,887 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 240 transitions. Word has length 15 [2021-05-03 14:04:26,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:26,887 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 240 transitions. [2021-05-03 14:04:26,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 240 transitions. [2021-05-03 14:04:26,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:26,889 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:26,889 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:27,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:27,104 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:27,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:27,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1850292010, now seen corresponding path program 10 times [2021-05-03 14:04:27,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:27,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109166518] [2021-05-03 14:04:27,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:27,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:27,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109166518] [2021-05-03 14:04:27,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529343564] [2021-05-03 14:04:27,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:27,214 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:27,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:27,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:04:27,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:27,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:27,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 27 treesize of output 99 [2021-05-03 14:04:27,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:27,391 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:27,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:27,392 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:3 [2021-05-03 14:04:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:27,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:27,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-05-03 14:04:27,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424123168] [2021-05-03 14:04:27,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:27,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:27,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:27,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:27,400 INFO L87 Difference]: Start difference. First operand 87 states and 240 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:27,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:27,488 INFO L93 Difference]: Finished difference Result 149 states and 348 transitions. [2021-05-03 14:04:27,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:27,488 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-05-03 14:04:27,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:27,489 INFO L225 Difference]: With dead ends: 149 [2021-05-03 14:04:27,489 INFO L226 Difference]: Without dead ends: 146 [2021-05-03 14:04:27,490 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-03 14:04:27,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2021-05-03 14:04:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.8484848484848486) internal successors, (282), 99 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 282 transitions. [2021-05-03 14:04:27,494 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 282 transitions. Word has length 15 [2021-05-03 14:04:27,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:27,494 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 282 transitions. [2021-05-03 14:04:27,494 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 282 transitions. [2021-05-03 14:04:27,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:27,495 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:27,496 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:27,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-03 14:04:27,705 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:27,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:27,706 INFO L82 PathProgramCache]: Analyzing trace with hash -643543428, now seen corresponding path program 11 times [2021-05-03 14:04:27,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:27,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575428684] [2021-05-03 14:04:27,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:27,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575428684] [2021-05-03 14:04:27,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822739676] [2021-05-03 14:04:27,810 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:27,841 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:04:27,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:27,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:27,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:28,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:28,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:04:28,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274593573] [2021-05-03 14:04:28,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:28,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:28,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:28,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:28,463 INFO L87 Difference]: Start difference. First operand 100 states and 282 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:28,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:28,614 INFO L93 Difference]: Finished difference Result 171 states and 375 transitions. [2021-05-03 14:04:28,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:28,615 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:28,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:28,617 INFO L225 Difference]: With dead ends: 171 [2021-05-03 14:04:28,617 INFO L226 Difference]: Without dead ends: 171 [2021-05-03 14:04:28,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 251.6ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:28,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-05-03 14:04:28,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 103. [2021-05-03 14:04:28,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.843137254901961) internal successors, (290), 102 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:28,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 290 transitions. [2021-05-03 14:04:28,623 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 290 transitions. Word has length 16 [2021-05-03 14:04:28,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:28,623 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 290 transitions. [2021-05-03 14:04:28,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:28,624 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 290 transitions. [2021-05-03 14:04:28,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:28,624 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:28,624 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:28,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:28,837 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:28,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:28,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1421287673, now seen corresponding path program 12 times [2021-05-03 14:04:28,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:28,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205677459] [2021-05-03 14:04:28,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:28,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205677459] [2021-05-03 14:04:28,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121184595] [2021-05-03 14:04:28,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:28,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:04:28,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:28,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:28,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:29,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:29,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:04:29,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013503940] [2021-05-03 14:04:29,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:29,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:29,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:29,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:29,036 INFO L87 Difference]: Start difference. First operand 103 states and 290 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:29,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:29,196 INFO L93 Difference]: Finished difference Result 207 states and 463 transitions. [2021-05-03 14:04:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:04:29,197 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:29,199 INFO L225 Difference]: With dead ends: 207 [2021-05-03 14:04:29,199 INFO L226 Difference]: Without dead ends: 202 [2021-05-03 14:04:29,199 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 125.7ms TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:04:29,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-03 14:04:29,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 125. [2021-05-03 14:04:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.838709677419355) internal successors, (352), 124 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:29,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 352 transitions. [2021-05-03 14:04:29,207 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 352 transitions. Word has length 16 [2021-05-03 14:04:29,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:29,208 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 352 transitions. [2021-05-03 14:04:29,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:29,208 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 352 transitions. [2021-05-03 14:04:29,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:29,208 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:29,208 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:29,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-05-03 14:04:29,424 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:29,425 INFO L82 PathProgramCache]: Analyzing trace with hash 946722458, now seen corresponding path program 13 times [2021-05-03 14:04:29,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:29,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204164305] [2021-05-03 14:04:29,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:29,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204164305] [2021-05-03 14:04:29,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721855429] [2021-05-03 14:04:29,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:29,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:29,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:29,615 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:29,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:29,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:04:29,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263703004] [2021-05-03 14:04:29,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:29,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:29,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:29,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:29,617 INFO L87 Difference]: Start difference. First operand 125 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:29,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:29,702 INFO L93 Difference]: Finished difference Result 152 states and 389 transitions. [2021-05-03 14:04:29,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:29,702 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:29,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:29,703 INFO L225 Difference]: With dead ends: 152 [2021-05-03 14:04:29,703 INFO L226 Difference]: Without dead ends: 151 [2021-05-03 14:04:29,703 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:29,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-03 14:04:29,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 126. [2021-05-03 14:04:29,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:29,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-05-03 14:04:29,707 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-05-03 14:04:29,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:29,707 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-05-03 14:04:29,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:29,707 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-05-03 14:04:29,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:29,708 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:29,708 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:29,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:29,935 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:29,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:29,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1869141191, now seen corresponding path program 14 times [2021-05-03 14:04:29,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:29,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342109686] [2021-05-03 14:04:29,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:30,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342109686] [2021-05-03 14:04:30,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392163917] [2021-05-03 14:04:30,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:30,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:30,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:30,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:30,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:30,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:30,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:04:30,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654200498] [2021-05-03 14:04:30,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:30,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:30,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:30,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:30,261 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:30,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:30,303 INFO L93 Difference]: Finished difference Result 214 states and 476 transitions. [2021-05-03 14:04:30,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:30,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:30,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:30,305 INFO L225 Difference]: With dead ends: 214 [2021-05-03 14:04:30,305 INFO L226 Difference]: Without dead ends: 214 [2021-05-03 14:04:30,305 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 228.3ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:30,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-03 14:04:30,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 126. [2021-05-03 14:04:30,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.816) internal successors, (352), 125 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:30,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 352 transitions. [2021-05-03 14:04:30,309 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 352 transitions. Word has length 16 [2021-05-03 14:04:30,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:30,310 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 352 transitions. [2021-05-03 14:04:30,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:30,310 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 352 transitions. [2021-05-03 14:04:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:30,310 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:30,310 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:30,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-05-03 14:04:30,533 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:30,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:30,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1440737642, now seen corresponding path program 15 times [2021-05-03 14:04:30,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:30,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057547912] [2021-05-03 14:04:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:30,584 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:30,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057547912] [2021-05-03 14:04:30,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957351828] [2021-05-03 14:04:30,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:30,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:04:30,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:30,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:30,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:30,667 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:30,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:30,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:04:30,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361185016] [2021-05-03 14:04:30,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:30,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:30,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:30,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:30,669 INFO L87 Difference]: Start difference. First operand 126 states and 352 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:30,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:30,728 INFO L93 Difference]: Finished difference Result 211 states and 472 transitions. [2021-05-03 14:04:30,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:04:30,728 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:30,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:30,729 INFO L225 Difference]: With dead ends: 211 [2021-05-03 14:04:30,729 INFO L226 Difference]: Without dead ends: 211 [2021-05-03 14:04:30,730 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:30,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-05-03 14:04:30,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 132. [2021-05-03 14:04:30,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.8091603053435112) internal successors, (368), 131 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:30,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 368 transitions. [2021-05-03 14:04:30,734 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 368 transitions. Word has length 16 [2021-05-03 14:04:30,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:30,734 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 368 transitions. [2021-05-03 14:04:30,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:30,735 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 368 transitions. [2021-05-03 14:04:30,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:30,735 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:30,735 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:30,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-05-03 14:04:30,953 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:30,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:30,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1770939521, now seen corresponding path program 16 times [2021-05-03 14:04:30,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:30,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892946074] [2021-05-03 14:04:30,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:31,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892946074] [2021-05-03 14:04:31,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450050942] [2021-05-03 14:04:31,040 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:31,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:31,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:31,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:31,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:31,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:31,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:04:31,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966235316] [2021-05-03 14:04:31,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:31,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:31,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:31,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:31,169 INFO L87 Difference]: Start difference. First operand 132 states and 368 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:31,276 INFO L93 Difference]: Finished difference Result 225 states and 509 transitions. [2021-05-03 14:04:31,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:31,276 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:31,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:31,277 INFO L225 Difference]: With dead ends: 225 [2021-05-03 14:04:31,278 INFO L226 Difference]: Without dead ends: 223 [2021-05-03 14:04:31,278 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:31,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-05-03 14:04:31,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 139. [2021-05-03 14:04:31,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8550724637681157) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 394 transitions. [2021-05-03 14:04:31,282 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 394 transitions. Word has length 16 [2021-05-03 14:04:31,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:31,282 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 394 transitions. [2021-05-03 14:04:31,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,283 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 394 transitions. [2021-05-03 14:04:31,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:31,283 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:31,283 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:31,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:31,505 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:31,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:31,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1114137344, now seen corresponding path program 17 times [2021-05-03 14:04:31,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:31,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903050397] [2021-05-03 14:04:31,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:31,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:31,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903050397] [2021-05-03 14:04:31,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579716774] [2021-05-03 14:04:31,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:31,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:04:31,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:31,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:31,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:31,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:31,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:04:31,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140691102] [2021-05-03 14:04:31,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:31,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:31,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:31,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:31,697 INFO L87 Difference]: Start difference. First operand 139 states and 394 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:31,821 INFO L93 Difference]: Finished difference Result 206 states and 478 transitions. [2021-05-03 14:04:31,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:31,821 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:31,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:31,822 INFO L225 Difference]: With dead ends: 206 [2021-05-03 14:04:31,822 INFO L226 Difference]: Without dead ends: 205 [2021-05-03 14:04:31,822 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:31,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-05-03 14:04:31,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 139. [2021-05-03 14:04:31,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-05-03 14:04:31,827 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-05-03 14:04:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:31,827 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-05-03 14:04:31,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,828 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-05-03 14:04:31,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:31,829 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:31,829 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:32,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-05-03 14:04:32,029 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:32,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:32,030 INFO L82 PathProgramCache]: Analyzing trace with hash -191718611, now seen corresponding path program 18 times [2021-05-03 14:04:32,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:32,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817170498] [2021-05-03 14:04:32,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:32,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817170498] [2021-05-03 14:04:32,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189777424] [2021-05-03 14:04:32,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:32,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:04:32,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:32,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:32,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:32,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:32,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:04:32,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338221869] [2021-05-03 14:04:32,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:32,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:32,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:32,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:32,226 INFO L87 Difference]: Start difference. First operand 139 states and 393 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:32,289 INFO L93 Difference]: Finished difference Result 231 states and 521 transitions. [2021-05-03 14:04:32,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:32,289 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:32,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:32,290 INFO L225 Difference]: With dead ends: 231 [2021-05-03 14:04:32,290 INFO L226 Difference]: Without dead ends: 231 [2021-05-03 14:04:32,290 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:32,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-03 14:04:32,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 139. [2021-05-03 14:04:32,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.847826086956522) internal successors, (393), 138 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 393 transitions. [2021-05-03 14:04:32,294 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 393 transitions. Word has length 16 [2021-05-03 14:04:32,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:32,294 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 393 transitions. [2021-05-03 14:04:32,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,294 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 393 transitions. [2021-05-03 14:04:32,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:32,294 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:32,294 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:32,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:32,513 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:32,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:32,513 INFO L82 PathProgramCache]: Analyzing trace with hash 596475964, now seen corresponding path program 19 times [2021-05-03 14:04:32,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:32,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683421163] [2021-05-03 14:04:32,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:32,569 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:32,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683421163] [2021-05-03 14:04:32,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119643378] [2021-05-03 14:04:32,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:32,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:32,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:32,695 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:32,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:32,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:04:32,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068153925] [2021-05-03 14:04:32,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:32,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:32,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:32,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:32,696 INFO L87 Difference]: Start difference. First operand 139 states and 393 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:32,801 INFO L93 Difference]: Finished difference Result 181 states and 451 transitions. [2021-05-03 14:04:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:04:32,801 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:32,803 INFO L225 Difference]: With dead ends: 181 [2021-05-03 14:04:32,803 INFO L226 Difference]: Without dead ends: 179 [2021-05-03 14:04:32,803 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:32,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-05-03 14:04:32,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2021-05-03 14:04:32,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-05-03 14:04:32,808 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-05-03 14:04:32,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:32,809 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-05-03 14:04:32,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,809 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-05-03 14:04:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:32,809 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:32,809 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:33,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:33,029 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:33,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:33,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1920765945, now seen corresponding path program 20 times [2021-05-03 14:04:33,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:33,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893616257] [2021-05-03 14:04:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:33,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893616257] [2021-05-03 14:04:33,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161847973] [2021-05-03 14:04:33,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:33,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:33,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:33,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:33,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:33,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:33,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:04:33,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824204157] [2021-05-03 14:04:33,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:33,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:33,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:33,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:33,199 INFO L87 Difference]: Start difference. First operand 140 states and 394 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:33,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:33,284 INFO L93 Difference]: Finished difference Result 248 states and 551 transitions. [2021-05-03 14:04:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:33,284 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:33,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:33,285 INFO L225 Difference]: With dead ends: 248 [2021-05-03 14:04:33,285 INFO L226 Difference]: Without dead ends: 248 [2021-05-03 14:04:33,286 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:33,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-03 14:04:33,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 140. [2021-05-03 14:04:33,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.8345323741007196) internal successors, (394), 139 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 394 transitions. [2021-05-03 14:04:33,290 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 394 transitions. Word has length 16 [2021-05-03 14:04:33,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:33,290 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 394 transitions. [2021-05-03 14:04:33,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:33,290 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 394 transitions. [2021-05-03 14:04:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:33,290 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:33,291 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:33,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:33,507 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:33,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:33,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1978593220, now seen corresponding path program 21 times [2021-05-03 14:04:33,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:33,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326538925] [2021-05-03 14:04:33,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:34,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326538925] [2021-05-03 14:04:34,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853342042] [2021-05-03 14:04:34,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:34,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:04:34,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:34,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:34,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:34,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:34,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:04:34,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779784379] [2021-05-03 14:04:34,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:34,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:34,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:34,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:34,232 INFO L87 Difference]: Start difference. First operand 140 states and 394 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:34,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:34,318 INFO L93 Difference]: Finished difference Result 230 states and 525 transitions. [2021-05-03 14:04:34,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:04:34,318 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:34,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:34,319 INFO L225 Difference]: With dead ends: 230 [2021-05-03 14:04:34,319 INFO L226 Difference]: Without dead ends: 230 [2021-05-03 14:04:34,320 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 585.9ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:34,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-03 14:04:34,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 146. [2021-05-03 14:04:34,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8413793103448275) internal successors, (412), 145 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:34,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 412 transitions. [2021-05-03 14:04:34,323 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 412 transitions. Word has length 16 [2021-05-03 14:04:34,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:34,323 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 412 transitions. [2021-05-03 14:04:34,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:34,323 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 412 transitions. [2021-05-03 14:04:34,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:34,329 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:34,329 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:34,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:34,533 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:34,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:34,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1233083943, now seen corresponding path program 22 times [2021-05-03 14:04:34,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:34,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964082701] [2021-05-03 14:04:34,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:34,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:34,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964082701] [2021-05-03 14:04:34,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115862243] [2021-05-03 14:04:34,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:34,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:34,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:34,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:34,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:34,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:34,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:34,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:04:34,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888078182] [2021-05-03 14:04:34,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:34,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:34,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:34,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:34,629 INFO L87 Difference]: Start difference. First operand 146 states and 412 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:34,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:34,796 INFO L93 Difference]: Finished difference Result 240 states and 554 transitions. [2021-05-03 14:04:34,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:34,797 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:34,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:34,798 INFO L225 Difference]: With dead ends: 240 [2021-05-03 14:04:34,798 INFO L226 Difference]: Without dead ends: 238 [2021-05-03 14:04:34,798 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:34,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-03 14:04:34,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 155. [2021-05-03 14:04:34,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.883116883116883) internal successors, (444), 154 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:34,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 444 transitions. [2021-05-03 14:04:34,803 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 444 transitions. Word has length 16 [2021-05-03 14:04:34,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:34,803 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 444 transitions. [2021-05-03 14:04:34,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:34,803 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 444 transitions. [2021-05-03 14:04:34,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:34,804 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:34,804 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:35,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:35,004 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:35,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:35,005 INFO L82 PathProgramCache]: Analyzing trace with hash -576281766, now seen corresponding path program 23 times [2021-05-03 14:04:35,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:35,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51370019] [2021-05-03 14:04:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:35,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:35,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51370019] [2021-05-03 14:04:35,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055854224] [2021-05-03 14:04:35,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:35,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:04:35,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:35,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:35,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:35,374 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:35,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:35,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:04:35,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617186914] [2021-05-03 14:04:35,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:35,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:35,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:35,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:35,379 INFO L87 Difference]: Start difference. First operand 155 states and 444 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:35,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:35,480 INFO L93 Difference]: Finished difference Result 229 states and 540 transitions. [2021-05-03 14:04:35,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:35,481 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:35,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:35,489 INFO L225 Difference]: With dead ends: 229 [2021-05-03 14:04:35,489 INFO L226 Difference]: Without dead ends: 228 [2021-05-03 14:04:35,489 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-03 14:04:35,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2021-05-03 14:04:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:35,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-05-03 14:04:35,508 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-05-03 14:04:35,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:35,509 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-05-03 14:04:35,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:35,509 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-05-03 14:04:35,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:35,509 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:35,509 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:35,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:35,728 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:35,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:35,728 INFO L82 PathProgramCache]: Analyzing trace with hash 346136967, now seen corresponding path program 24 times [2021-05-03 14:04:35,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:35,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010297918] [2021-05-03 14:04:35,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:35,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010297918] [2021-05-03 14:04:35,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648793311] [2021-05-03 14:04:35,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:35,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:04:35,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:35,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:35,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:35,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:35,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:04:35,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434361060] [2021-05-03 14:04:35,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:35,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:35,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:35,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:35,876 INFO L87 Difference]: Start difference. First operand 155 states and 443 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:35,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:35,925 INFO L93 Difference]: Finished difference Result 244 states and 562 transitions. [2021-05-03 14:04:35,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:35,926 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:35,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:35,927 INFO L225 Difference]: With dead ends: 244 [2021-05-03 14:04:35,927 INFO L226 Difference]: Without dead ends: 244 [2021-05-03 14:04:35,927 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:35,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-03 14:04:35,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 155. [2021-05-03 14:04:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8766233766233764) internal successors, (443), 154 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:35,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 443 transitions. [2021-05-03 14:04:35,945 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 443 transitions. Word has length 16 [2021-05-03 14:04:35,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:35,945 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 443 transitions. [2021-05-03 14:04:35,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:35,945 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 443 transitions. [2021-05-03 14:04:35,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:35,945 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:35,945 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:36,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-05-03 14:04:36,146 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:36,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:36,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1134331542, now seen corresponding path program 25 times [2021-05-03 14:04:36,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:36,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301070035] [2021-05-03 14:04:36,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:36,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301070035] [2021-05-03 14:04:36,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230625585] [2021-05-03 14:04:36,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:36,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:36,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:36,293 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:36,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:36,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:04:36,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025391794] [2021-05-03 14:04:36,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:36,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:36,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:36,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:36,295 INFO L87 Difference]: Start difference. First operand 155 states and 443 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:36,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:36,405 INFO L93 Difference]: Finished difference Result 234 states and 546 transitions. [2021-05-03 14:04:36,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:04:36,405 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:36,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:36,407 INFO L225 Difference]: With dead ends: 234 [2021-05-03 14:04:36,407 INFO L226 Difference]: Without dead ends: 232 [2021-05-03 14:04:36,408 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:36,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-03 14:04:36,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 155. [2021-05-03 14:04:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:36,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-05-03 14:04:36,414 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-05-03 14:04:36,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:36,414 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-05-03 14:04:36,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:36,414 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-05-03 14:04:36,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:36,414 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:36,415 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:36,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-05-03 14:04:36,636 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:36,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:36,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1382910367, now seen corresponding path program 26 times [2021-05-03 14:04:36,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:36,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169275739] [2021-05-03 14:04:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:36,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169275739] [2021-05-03 14:04:36,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851857040] [2021-05-03 14:04:36,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:36,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:36,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:36,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:36,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:36,779 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:36,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:36,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:04:36,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846177753] [2021-05-03 14:04:36,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:36,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:36,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:36,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:36,780 INFO L87 Difference]: Start difference. First operand 155 states and 442 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:36,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:36,850 INFO L93 Difference]: Finished difference Result 257 states and 584 transitions. [2021-05-03 14:04:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:36,850 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:36,851 INFO L225 Difference]: With dead ends: 257 [2021-05-03 14:04:36,851 INFO L226 Difference]: Without dead ends: 257 [2021-05-03 14:04:36,851 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:36,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-05-03 14:04:36,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 155. [2021-05-03 14:04:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.8701298701298703) internal successors, (442), 154 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 442 transitions. [2021-05-03 14:04:36,858 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 442 transitions. Word has length 16 [2021-05-03 14:04:36,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:36,858 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 442 transitions. [2021-05-03 14:04:36,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:36,858 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 442 transitions. [2021-05-03 14:04:36,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:36,858 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:36,858 INFO L551 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:37,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2021-05-03 14:04:37,079 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:37,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:37,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1671230758, now seen corresponding path program 27 times [2021-05-03 14:04:37,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:37,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978323964] [2021-05-03 14:04:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:37,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978323964] [2021-05-03 14:04:37,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77646484] [2021-05-03 14:04:37,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:37,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:04:37,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:37,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:04:37,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:37,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:37,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-05-03 14:04:37,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145638430] [2021-05-03 14:04:37,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:04:37,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:37,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:04:37,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:04:37,305 INFO L87 Difference]: Start difference. First operand 155 states and 442 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:37,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:37,629 INFO L93 Difference]: Finished difference Result 265 states and 708 transitions. [2021-05-03 14:04:37,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:04:37,629 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:37,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:37,630 INFO L225 Difference]: With dead ends: 265 [2021-05-03 14:04:37,630 INFO L226 Difference]: Without dead ends: 262 [2021-05-03 14:04:37,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:04:37,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-03 14:04:37,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 202. [2021-05-03 14:04:37,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.8208955223880596) internal successors, (567), 201 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:37,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 567 transitions. [2021-05-03 14:04:37,635 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 567 transitions. Word has length 16 [2021-05-03 14:04:37,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:37,635 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 567 transitions. [2021-05-03 14:04:37,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:37,636 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 567 transitions. [2021-05-03 14:04:37,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:37,636 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:37,636 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:37,849 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:37,849 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:37,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:37,850 INFO L82 PathProgramCache]: Analyzing trace with hash 851197127, now seen corresponding path program 28 times [2021-05-03 14:04:37,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:37,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146177672] [2021-05-03 14:04:37,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:37,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146177672] [2021-05-03 14:04:37,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256122551] [2021-05-03 14:04:37,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:37,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:37,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:37,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:37,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:38,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:38,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:04:38,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921920829] [2021-05-03 14:04:38,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:38,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:38,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:38,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:38,014 INFO L87 Difference]: Start difference. First operand 202 states and 567 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:38,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:38,142 INFO L93 Difference]: Finished difference Result 353 states and 820 transitions. [2021-05-03 14:04:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:38,150 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:38,151 INFO L225 Difference]: With dead ends: 353 [2021-05-03 14:04:38,151 INFO L226 Difference]: Without dead ends: 353 [2021-05-03 14:04:38,153 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:04:38,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-05-03 14:04:38,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 215. [2021-05-03 14:04:38,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.8598130841121496) internal successors, (612), 214 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 612 transitions. [2021-05-03 14:04:38,163 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 612 transitions. Word has length 16 [2021-05-03 14:04:38,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:38,163 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 612 transitions. [2021-05-03 14:04:38,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:38,163 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 612 transitions. [2021-05-03 14:04:38,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:38,164 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:38,164 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:38,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-05-03 14:04:38,385 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:38,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:38,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1739430209, now seen corresponding path program 29 times [2021-05-03 14:04:38,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:38,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180471322] [2021-05-03 14:04:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:38,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:38,448 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:38,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180471322] [2021-05-03 14:04:38,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730584909] [2021-05-03 14:04:38,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:38,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:04:38,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:38,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:38,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:38,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:38,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:04:38,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956872307] [2021-05-03 14:04:38,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:38,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:38,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:38,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:38,593 INFO L87 Difference]: Start difference. First operand 215 states and 612 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:38,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:38,684 INFO L93 Difference]: Finished difference Result 342 states and 821 transitions. [2021-05-03 14:04:38,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:38,684 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:38,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:38,686 INFO L225 Difference]: With dead ends: 342 [2021-05-03 14:04:38,686 INFO L226 Difference]: Without dead ends: 340 [2021-05-03 14:04:38,688 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:38,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-05-03 14:04:38,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 239. [2021-05-03 14:04:38,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:38,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-05-03 14:04:38,698 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-05-03 14:04:38,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:38,698 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-05-03 14:04:38,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:38,699 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-05-03 14:04:38,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:38,699 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:38,699 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:38,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:38,913 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:38,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:38,913 INFO L82 PathProgramCache]: Analyzing trace with hash -160209299, now seen corresponding path program 30 times [2021-05-03 14:04:38,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:38,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643922116] [2021-05-03 14:04:38,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:38,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643922116] [2021-05-03 14:04:38,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101262077] [2021-05-03 14:04:38,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:38,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:04:38,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:39,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:39,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:39,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:39,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:04:39,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112244506] [2021-05-03 14:04:39,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:39,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:39,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:39,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:39,084 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:39,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:39,125 INFO L93 Difference]: Finished difference Result 348 states and 838 transitions. [2021-05-03 14:04:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:39,126 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:39,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:39,127 INFO L225 Difference]: With dead ends: 348 [2021-05-03 14:04:39,127 INFO L226 Difference]: Without dead ends: 348 [2021-05-03 14:04:39,128 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-05-03 14:04:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 239. [2021-05-03 14:04:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:39,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-05-03 14:04:39,137 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-05-03 14:04:39,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:39,137 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-05-03 14:04:39,137 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:39,137 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-05-03 14:04:39,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:39,138 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:39,138 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:39,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:39,359 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:39,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:39,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1889256633, now seen corresponding path program 31 times [2021-05-03 14:04:39,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:39,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607419522] [2021-05-03 14:04:39,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:39,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:39,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607419522] [2021-05-03 14:04:39,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498948321] [2021-05-03 14:04:39,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:39,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:39,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:39,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:39,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:04:39,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743219585] [2021-05-03 14:04:39,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:39,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:39,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:39,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:39,632 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:39,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:39,699 INFO L93 Difference]: Finished difference Result 362 states and 868 transitions. [2021-05-03 14:04:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:39,700 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:39,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:39,701 INFO L225 Difference]: With dead ends: 362 [2021-05-03 14:04:39,701 INFO L226 Difference]: Without dead ends: 362 [2021-05-03 14:04:39,702 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:39,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-05-03 14:04:39,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 239. [2021-05-03 14:04:39,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:39,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-05-03 14:04:39,707 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-05-03 14:04:39,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:39,707 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-05-03 14:04:39,707 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:39,707 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-05-03 14:04:39,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:39,708 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:39,708 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:39,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable185 [2021-05-03 14:04:39,924 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:39,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:39,924 INFO L82 PathProgramCache]: Analyzing trace with hash 344850861, now seen corresponding path program 32 times [2021-05-03 14:04:39,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:39,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813595645] [2021-05-03 14:04:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:39,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813595645] [2021-05-03 14:04:39,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003107355] [2021-05-03 14:04:39,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:40,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:40,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:40,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:40,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:40,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:40,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:04:40,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479610389] [2021-05-03 14:04:40,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:40,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:40,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:40,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:40,073 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:40,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:40,142 INFO L93 Difference]: Finished difference Result 346 states and 841 transitions. [2021-05-03 14:04:40,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:40,151 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:40,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:40,154 INFO L225 Difference]: With dead ends: 346 [2021-05-03 14:04:40,154 INFO L226 Difference]: Without dead ends: 346 [2021-05-03 14:04:40,154 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 74.4ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:40,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-05-03 14:04:40,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 239. [2021-05-03 14:04:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.911764705882353) internal successors, (693), 238 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 693 transitions. [2021-05-03 14:04:40,162 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 693 transitions. Word has length 16 [2021-05-03 14:04:40,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:40,162 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 693 transitions. [2021-05-03 14:04:40,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:40,162 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 693 transitions. [2021-05-03 14:04:40,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:40,163 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:40,163 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:40,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:40,386 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:40,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:40,387 INFO L82 PathProgramCache]: Analyzing trace with hash 882706439, now seen corresponding path program 33 times [2021-05-03 14:04:40,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:40,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063181941] [2021-05-03 14:04:40,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:40,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:40,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063181941] [2021-05-03 14:04:40,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798817945] [2021-05-03 14:04:40,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:40,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:04:40,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:40,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:40,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:40,501 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:40,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:40,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:04:40,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003245203] [2021-05-03 14:04:40,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:40,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:40,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:40,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:40,503 INFO L87 Difference]: Start difference. First operand 239 states and 693 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:40,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:40,625 INFO L93 Difference]: Finished difference Result 402 states and 976 transitions. [2021-05-03 14:04:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:04:40,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:40,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:40,630 INFO L225 Difference]: With dead ends: 402 [2021-05-03 14:04:40,631 INFO L226 Difference]: Without dead ends: 402 [2021-05-03 14:04:40,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 105.6ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:40,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-05-03 14:04:40,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 254. [2021-05-03 14:04:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.932806324110672) internal successors, (742), 253 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 742 transitions. [2021-05-03 14:04:40,637 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 742 transitions. Word has length 16 [2021-05-03 14:04:40,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:40,637 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 742 transitions. [2021-05-03 14:04:40,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:40,637 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 742 transitions. [2021-05-03 14:04:40,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:40,638 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:40,638 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:40,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable187 [2021-05-03 14:04:40,861 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:40,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:40,861 INFO L82 PathProgramCache]: Analyzing trace with hash -256295271, now seen corresponding path program 34 times [2021-05-03 14:04:40,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:40,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668888411] [2021-05-03 14:04:40,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:40,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:40,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668888411] [2021-05-03 14:04:40,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319731989] [2021-05-03 14:04:40,906 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:40,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:40,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:40,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:40,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:40,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:40,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:04:40,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898784859] [2021-05-03 14:04:40,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:40,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:40,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:40,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:40,954 INFO L87 Difference]: Start difference. First operand 254 states and 742 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:41,071 INFO L93 Difference]: Finished difference Result 396 states and 995 transitions. [2021-05-03 14:04:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:41,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:41,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:41,074 INFO L225 Difference]: With dead ends: 396 [2021-05-03 14:04:41,074 INFO L226 Difference]: Without dead ends: 394 [2021-05-03 14:04:41,074 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:41,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-03 14:04:41,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 292. [2021-05-03 14:04:41,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.9828178694158076) internal successors, (868), 291 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:41,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 868 transitions. [2021-05-03 14:04:41,082 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 868 transitions. Word has length 16 [2021-05-03 14:04:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:41,083 INFO L480 AbstractCegarLoop]: Abstraction has 292 states and 868 transitions. [2021-05-03 14:04:41,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 868 transitions. [2021-05-03 14:04:41,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:41,084 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:41,084 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:41,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-05-03 14:04:41,301 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:41,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:41,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1322925639, now seen corresponding path program 35 times [2021-05-03 14:04:41,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:41,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653688945] [2021-05-03 14:04:41,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:41,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653688945] [2021-05-03 14:04:41,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343327802] [2021-05-03 14:04:41,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:41,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:04:41,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:41,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:41,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:41,439 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:41,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:41,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:04:41,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616066282] [2021-05-03 14:04:41,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:41,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:41,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:41,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:41,441 INFO L87 Difference]: Start difference. First operand 292 states and 868 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:41,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:41,473 INFO L93 Difference]: Finished difference Result 394 states and 992 transitions. [2021-05-03 14:04:41,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:41,474 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:41,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:41,477 INFO L225 Difference]: With dead ends: 394 [2021-05-03 14:04:41,477 INFO L226 Difference]: Without dead ends: 394 [2021-05-03 14:04:41,477 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:41,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-05-03 14:04:41,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 290. [2021-05-03 14:04:41,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.9757785467128026) internal successors, (860), 289 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:41,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 860 transitions. [2021-05-03 14:04:41,484 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 860 transitions. Word has length 16 [2021-05-03 14:04:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:41,484 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 860 transitions. [2021-05-03 14:04:41,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:41,484 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 860 transitions. [2021-05-03 14:04:41,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:41,485 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:41,485 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:41,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-05-03 14:04:41,705 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:41,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:41,705 INFO L82 PathProgramCache]: Analyzing trace with hash -406121695, now seen corresponding path program 36 times [2021-05-03 14:04:41,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:41,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294026871] [2021-05-03 14:04:41,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:41,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294026871] [2021-05-03 14:04:41,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984899636] [2021-05-03 14:04:41,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:41,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:04:41,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:41,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:41,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:41,803 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:41,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:41,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:04:41,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013326466] [2021-05-03 14:04:41,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:41,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:41,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:41,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:41,804 INFO L87 Difference]: Start difference. First operand 290 states and 860 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:41,863 INFO L93 Difference]: Finished difference Result 402 states and 1006 transitions. [2021-05-03 14:04:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:41,863 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:41,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:41,864 INFO L225 Difference]: With dead ends: 402 [2021-05-03 14:04:41,864 INFO L226 Difference]: Without dead ends: 402 [2021-05-03 14:04:41,864 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 47.8ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:41,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-05-03 14:04:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 286. [2021-05-03 14:04:41,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-05-03 14:04:41,870 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-05-03 14:04:41,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:41,870 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-05-03 14:04:41,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:41,870 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-05-03 14:04:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:41,871 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:41,871 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:42,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-05-03 14:04:42,089 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:42,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:42,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1827985799, now seen corresponding path program 37 times [2021-05-03 14:04:42,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:42,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598820077] [2021-05-03 14:04:42,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:42,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598820077] [2021-05-03 14:04:42,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611888969] [2021-05-03 14:04:42,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:42,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:42,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:42,222 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:42,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:42,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:04:42,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662278693] [2021-05-03 14:04:42,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:42,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:42,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:42,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:42,223 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:42,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:42,292 INFO L93 Difference]: Finished difference Result 379 states and 975 transitions. [2021-05-03 14:04:42,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:42,292 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:42,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:42,293 INFO L225 Difference]: With dead ends: 379 [2021-05-03 14:04:42,294 INFO L226 Difference]: Without dead ends: 379 [2021-05-03 14:04:42,294 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:42,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-05-03 14:04:42,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 286. [2021-05-03 14:04:42,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:42,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-05-03 14:04:42,300 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-05-03 14:04:42,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:42,300 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-05-03 14:04:42,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:42,301 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-05-03 14:04:42,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:42,301 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:42,301 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:42,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:42,521 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:42,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:42,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1929125919, now seen corresponding path program 38 times [2021-05-03 14:04:42,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:42,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182227685] [2021-05-03 14:04:42,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:42,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:42,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182227685] [2021-05-03 14:04:42,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743678851] [2021-05-03 14:04:42,565 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 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 [2021-05-03 14:04:42,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:42,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:42,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:42,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:42,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:42,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:04:42,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252760012] [2021-05-03 14:04:42,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:42,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:42,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:42,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:42,620 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:42,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:42,734 INFO L93 Difference]: Finished difference Result 381 states and 987 transitions. [2021-05-03 14:04:42,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:04:42,734 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:42,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:42,736 INFO L225 Difference]: With dead ends: 381 [2021-05-03 14:04:42,736 INFO L226 Difference]: Without dead ends: 381 [2021-05-03 14:04:42,736 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:04:42,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-03 14:04:42,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 286. [2021-05-03 14:04:42,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.968421052631579) internal successors, (846), 285 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 846 transitions. [2021-05-03 14:04:42,741 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 846 transitions. Word has length 16 [2021-05-03 14:04:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:42,741 INFO L480 AbstractCegarLoop]: Abstraction has 286 states and 846 transitions. [2021-05-03 14:04:42,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:42,742 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 846 transitions. [2021-05-03 14:04:42,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:42,742 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:42,742 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:42,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:42,964 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:42,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:42,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1859495111, now seen corresponding path program 39 times [2021-05-03 14:04:42,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:42,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489368608] [2021-05-03 14:04:42,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:43,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:43,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489368608] [2021-05-03 14:04:43,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534399906] [2021-05-03 14:04:43,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:43,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:04:43,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:43,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:43,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:43,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:43,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-03 14:04:43,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537528057] [2021-05-03 14:04:43,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:43,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:43,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:43,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:43,146 INFO L87 Difference]: Start difference. First operand 286 states and 846 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:43,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:43,278 INFO L93 Difference]: Finished difference Result 438 states and 1131 transitions. [2021-05-03 14:04:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:04:43,278 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:43,279 INFO L225 Difference]: With dead ends: 438 [2021-05-03 14:04:43,279 INFO L226 Difference]: Without dead ends: 438 [2021-05-03 14:04:43,280 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 168.1ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:04:43,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-05-03 14:04:43,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 297. [2021-05-03 14:04:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.9695945945945947) internal successors, (879), 296 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:43,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 879 transitions. [2021-05-03 14:04:43,285 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 879 transitions. Word has length 16 [2021-05-03 14:04:43,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:43,285 INFO L480 AbstractCegarLoop]: Abstraction has 297 states and 879 transitions. [2021-05-03 14:04:43,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:43,285 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 879 transitions. [2021-05-03 14:04:43,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:43,286 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:43,286 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:43,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:43,501 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:43,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:43,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1523752449, now seen corresponding path program 40 times [2021-05-03 14:04:43,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:43,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509249101] [2021-05-03 14:04:43,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:43,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:43,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509249101] [2021-05-03 14:04:43,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148559507] [2021-05-03 14:04:43,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:43,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:43,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:43,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:43,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:43,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:43,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-03 14:04:43,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621533450] [2021-05-03 14:04:43,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:43,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:43,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:43,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:43,598 INFO L87 Difference]: Start difference. First operand 297 states and 879 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:43,707 INFO L93 Difference]: Finished difference Result 446 states and 1150 transitions. [2021-05-03 14:04:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:43,707 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:43,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:43,708 INFO L225 Difference]: With dead ends: 446 [2021-05-03 14:04:43,708 INFO L226 Difference]: Without dead ends: 444 [2021-05-03 14:04:43,708 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:43,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-05-03 14:04:43,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 344. [2021-05-03 14:04:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 3.002915451895044) internal successors, (1030), 343 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:43,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 1030 transitions. [2021-05-03 14:04:43,715 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 1030 transitions. Word has length 16 [2021-05-03 14:04:43,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:43,715 INFO L480 AbstractCegarLoop]: Abstraction has 344 states and 1030 transitions. [2021-05-03 14:04:43,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:43,715 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 1030 transitions. [2021-05-03 14:04:43,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:43,716 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:43,716 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:43,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-05-03 14:04:43,929 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:43,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:43,929 INFO L82 PathProgramCache]: Analyzing trace with hash 55468461, now seen corresponding path program 41 times [2021-05-03 14:04:43,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:43,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071897300] [2021-05-03 14:04:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:44,037 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:44,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071897300] [2021-05-03 14:04:44,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863224543] [2021-05-03 14:04:44,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:44,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:04:44,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:44,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:44,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:44,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:44,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-03 14:04:44,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559872572] [2021-05-03 14:04:44,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:44,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:44,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:44,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:44,102 INFO L87 Difference]: Start difference. First operand 344 states and 1030 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:44,196 INFO L93 Difference]: Finished difference Result 432 states and 1125 transitions. [2021-05-03 14:04:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:04:44,196 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:44,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:44,198 INFO L225 Difference]: With dead ends: 432 [2021-05-03 14:04:44,198 INFO L226 Difference]: Without dead ends: 432 [2021-05-03 14:04:44,198 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:44,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2021-05-03 14:04:44,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 342. [2021-05-03 14:04:44,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.9853372434017595) internal successors, (1018), 341 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:44,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 1018 transitions. [2021-05-03 14:04:44,205 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 1018 transitions. Word has length 16 [2021-05-03 14:04:44,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:44,205 INFO L480 AbstractCegarLoop]: Abstraction has 342 states and 1018 transitions. [2021-05-03 14:04:44,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:44,206 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 1018 transitions. [2021-05-03 14:04:44,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:44,206 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:44,207 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:44,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:44,421 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:44,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:44,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1673578873, now seen corresponding path program 42 times [2021-05-03 14:04:44,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:44,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635252905] [2021-05-03 14:04:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:44,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635252905] [2021-05-03 14:04:44,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327458735] [2021-05-03 14:04:44,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:44,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:04:44,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:44,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:44,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:44,536 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:44,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:44,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-03 14:04:44,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382038435] [2021-05-03 14:04:44,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:44,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:44,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:44,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:44,537 INFO L87 Difference]: Start difference. First operand 342 states and 1018 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:44,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:44,666 INFO L93 Difference]: Finished difference Result 438 states and 1134 transitions. [2021-05-03 14:04:44,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:44,666 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:44,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:44,668 INFO L225 Difference]: With dead ends: 438 [2021-05-03 14:04:44,668 INFO L226 Difference]: Without dead ends: 438 [2021-05-03 14:04:44,668 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:04:44,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-05-03 14:04:44,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 338. [2021-05-03 14:04:44,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.979228486646884) internal successors, (1004), 337 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 1004 transitions. [2021-05-03 14:04:44,674 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 1004 transitions. Word has length 16 [2021-05-03 14:04:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:44,675 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 1004 transitions. [2021-05-03 14:04:44,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 1004 transitions. [2021-05-03 14:04:44,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:44,675 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:44,676 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:44,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:44,896 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:44,896 INFO L82 PathProgramCache]: Analyzing trace with hash 560528621, now seen corresponding path program 43 times [2021-05-03 14:04:44,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:44,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64831841] [2021-05-03 14:04:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:44,938 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:44,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64831841] [2021-05-03 14:04:44,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798705845] [2021-05-03 14:04:44,939 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:44,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:44,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:45,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:45,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:45,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-03 14:04:45,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618308497] [2021-05-03 14:04:45,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:45,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:45,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:45,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:45,001 INFO L87 Difference]: Start difference. First operand 338 states and 1004 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:45,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:45,139 INFO L93 Difference]: Finished difference Result 417 states and 1108 transitions. [2021-05-03 14:04:45,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:04:45,139 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:45,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:45,140 INFO L225 Difference]: With dead ends: 417 [2021-05-03 14:04:45,141 INFO L226 Difference]: Without dead ends: 417 [2021-05-03 14:04:45,141 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 121.7ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:04:45,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-05-03 14:04:45,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 332. [2021-05-03 14:04:45,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.972809667673716) internal successors, (984), 331 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 984 transitions. [2021-05-03 14:04:45,146 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 984 transitions. Word has length 16 [2021-05-03 14:04:45,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:45,146 INFO L480 AbstractCegarLoop]: Abstraction has 332 states and 984 transitions. [2021-05-03 14:04:45,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:45,146 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 984 transitions. [2021-05-03 14:04:45,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:45,147 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:45,147 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:45,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,45 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:45,368 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:45,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:45,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1098384199, now seen corresponding path program 44 times [2021-05-03 14:04:45,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:45,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333330597] [2021-05-03 14:04:45,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:45,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:45,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333330597] [2021-05-03 14:04:45,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648598781] [2021-05-03 14:04:45,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:45,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:45,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:45,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:45,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:45,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:45,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-03 14:04:45,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858769231] [2021-05-03 14:04:45,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:45,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:45,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:45,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:45,545 INFO L87 Difference]: Start difference. First operand 332 states and 984 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:45,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:45,682 INFO L93 Difference]: Finished difference Result 404 states and 1108 transitions. [2021-05-03 14:04:45,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:04:45,682 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:45,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:45,684 INFO L225 Difference]: With dead ends: 404 [2021-05-03 14:04:45,684 INFO L226 Difference]: Without dead ends: 404 [2021-05-03 14:04:45,684 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:04:45,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-05-03 14:04:45,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 325. [2021-05-03 14:04:45,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.9691358024691357) internal successors, (962), 324 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:45,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 962 transitions. [2021-05-03 14:04:45,690 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 962 transitions. Word has length 16 [2021-05-03 14:04:45,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:45,691 INFO L480 AbstractCegarLoop]: Abstraction has 325 states and 962 transitions. [2021-05-03 14:04:45,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:45,691 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 962 transitions. [2021-05-03 14:04:45,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:45,691 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:45,691 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:45,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:45,905 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:45,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:45,905 INFO L82 PathProgramCache]: Analyzing trace with hash 592037933, now seen corresponding path program 45 times [2021-05-03 14:04:45,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:45,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752041428] [2021-05-03 14:04:45,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:45,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:45,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752041428] [2021-05-03 14:04:45,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393882298] [2021-05-03 14:04:45,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:45,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:04:45,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:45,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:45,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:46,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:46,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-05-03 14:04:46,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927346100] [2021-05-03 14:04:46,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:46,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:46,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:46,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:46,029 INFO L87 Difference]: Start difference. First operand 325 states and 962 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:46,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:46,158 INFO L93 Difference]: Finished difference Result 408 states and 1118 transitions. [2021-05-03 14:04:46,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:46,158 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:46,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:46,159 INFO L225 Difference]: With dead ends: 408 [2021-05-03 14:04:46,159 INFO L226 Difference]: Without dead ends: 408 [2021-05-03 14:04:46,159 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:46,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-05-03 14:04:46,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 320. [2021-05-03 14:04:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.9655172413793105) internal successors, (946), 319 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:46,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 946 transitions. [2021-05-03 14:04:46,165 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 946 transitions. Word has length 16 [2021-05-03 14:04:46,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:46,166 INFO L480 AbstractCegarLoop]: Abstraction has 320 states and 946 transitions. [2021-05-03 14:04:46,166 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:46,166 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 946 transitions. [2021-05-03 14:04:46,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:46,166 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:46,167 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:46,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-05-03 14:04:46,381 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:46,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2075172871, now seen corresponding path program 46 times [2021-05-03 14:04:46,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:46,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723981334] [2021-05-03 14:04:46,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:46,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723981334] [2021-05-03 14:04:46,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630378310] [2021-05-03 14:04:46,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:46,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:46,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:46,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:46,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:46,542 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:46,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:46,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-05-03 14:04:46,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673003638] [2021-05-03 14:04:46,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:46,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:46,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:46,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:46,543 INFO L87 Difference]: Start difference. First operand 320 states and 946 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:46,739 INFO L93 Difference]: Finished difference Result 465 states and 1276 transitions. [2021-05-03 14:04:46,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:04:46,740 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-05-03 14:04:46,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:46,741 INFO L225 Difference]: With dead ends: 465 [2021-05-03 14:04:46,741 INFO L226 Difference]: Without dead ends: 465 [2021-05-03 14:04:46,742 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:04:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-05-03 14:04:46,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 317. [2021-05-03 14:04:46,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.9936708860759493) internal successors, (946), 316 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 946 transitions. [2021-05-03 14:04:46,748 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 946 transitions. Word has length 16 [2021-05-03 14:04:46,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:46,748 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 946 transitions. [2021-05-03 14:04:46,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:46,748 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 946 transitions. [2021-05-03 14:04:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:46,749 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:46,749 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:46,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:46,949 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:46,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:46,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1607417494, now seen corresponding path program 47 times [2021-05-03 14:04:46,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:46,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881321305] [2021-05-03 14:04:46,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:46,988 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:46,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881321305] [2021-05-03 14:04:46,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532110194] [2021-05-03 14:04:46,989 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:47,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:04:47,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:47,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:47,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:04:47,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:47,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-03 14:04:47,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291197398] [2021-05-03 14:04:47,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:47,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:47,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:47,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:47,059 INFO L87 Difference]: Start difference. First operand 317 states and 946 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 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) [2021-05-03 14:04:47,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:47,110 INFO L93 Difference]: Finished difference Result 414 states and 1090 transitions. [2021-05-03 14:04:47,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:04:47,111 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 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 17 [2021-05-03 14:04:47,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:47,113 INFO L225 Difference]: With dead ends: 414 [2021-05-03 14:04:47,114 INFO L226 Difference]: Without dead ends: 414 [2021-05-03 14:04:47,114 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:47,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-03 14:04:47,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 323. [2021-05-03 14:04:47,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9968944099378882) internal successors, (965), 322 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:47,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 965 transitions. [2021-05-03 14:04:47,120 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 965 transitions. Word has length 17 [2021-05-03 14:04:47,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:47,120 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 965 transitions. [2021-05-03 14:04:47,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 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) [2021-05-03 14:04:47,120 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 965 transitions. [2021-05-03 14:04:47,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:47,121 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:47,121 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:47,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-05-03 14:04:47,337 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:47,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:47,337 INFO L82 PathProgramCache]: Analyzing trace with hash 763155816, now seen corresponding path program 48 times [2021-05-03 14:04:47,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:47,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727330163] [2021-05-03 14:04:47,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:47,386 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:47,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727330163] [2021-05-03 14:04:47,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131622365] [2021-05-03 14:04:47,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:47,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:04:47,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:47,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:47,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:47,436 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:47,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:47,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-05-03 14:04:47,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387412381] [2021-05-03 14:04:47,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:47,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:47,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:47,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:47,437 INFO L87 Difference]: Start difference. First operand 323 states and 965 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:47,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:47,528 INFO L93 Difference]: Finished difference Result 409 states and 1079 transitions. [2021-05-03 14:04:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:47,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:04:47,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:47,530 INFO L225 Difference]: With dead ends: 409 [2021-05-03 14:04:47,530 INFO L226 Difference]: Without dead ends: 407 [2021-05-03 14:04:47,531 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:04:47,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-05-03 14:04:47,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 323. [2021-05-03 14:04:47,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.9906832298136647) internal successors, (963), 322 states have internal predecessors, (963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:47,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 963 transitions. [2021-05-03 14:04:47,537 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 963 transitions. Word has length 17 [2021-05-03 14:04:47,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:47,537 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 963 transitions. [2021-05-03 14:04:47,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:47,537 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 963 transitions. [2021-05-03 14:04:47,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:47,538 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:47,538 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:47,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-05-03 14:04:47,753 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:47,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:47,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2042406484, now seen corresponding path program 49 times [2021-05-03 14:04:47,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:47,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829772049] [2021-05-03 14:04:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:47,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829772049] [2021-05-03 14:04:47,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271173994] [2021-05-03 14:04:47,803 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:47,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:47,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:47,857 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:47,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:47,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-03 14:04:47,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148596817] [2021-05-03 14:04:47,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:47,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:47,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:47,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:47,860 INFO L87 Difference]: Start difference. First operand 323 states and 963 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:47,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:47,962 INFO L93 Difference]: Finished difference Result 414 states and 1084 transitions. [2021-05-03 14:04:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:04:47,963 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:04:47,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:47,964 INFO L225 Difference]: With dead ends: 414 [2021-05-03 14:04:47,964 INFO L226 Difference]: Without dead ends: 411 [2021-05-03 14:04:47,964 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:04:47,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-05-03 14:04:47,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 323. [2021-05-03 14:04:47,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.987577639751553) internal successors, (962), 322 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:47,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 962 transitions. [2021-05-03 14:04:47,971 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 962 transitions. Word has length 17 [2021-05-03 14:04:47,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:47,971 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 962 transitions. [2021-05-03 14:04:47,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:47,971 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 962 transitions. [2021-05-03 14:04:47,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:47,972 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:47,972 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:48,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:48,185 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:48,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:48,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1179475432, now seen corresponding path program 50 times [2021-05-03 14:04:48,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:48,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888285655] [2021-05-03 14:04:48,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:48,229 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:48,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888285655] [2021-05-03 14:04:48,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171869858] [2021-05-03 14:04:48,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:48,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:48,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:48,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:48,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:48,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:48,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-03 14:04:48,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439430827] [2021-05-03 14:04:48,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:48,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:48,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:48,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:48,300 INFO L87 Difference]: Start difference. First operand 323 states and 962 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:48,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:48,382 INFO L93 Difference]: Finished difference Result 367 states and 1049 transitions. [2021-05-03 14:04:48,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:04:48,383 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:04:48,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:48,384 INFO L225 Difference]: With dead ends: 367 [2021-05-03 14:04:48,384 INFO L226 Difference]: Without dead ends: 364 [2021-05-03 14:04:48,385 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:04:48,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-05-03 14:04:48,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 323. [2021-05-03 14:04:48,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.984472049689441) internal successors, (961), 322 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 961 transitions. [2021-05-03 14:04:48,390 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 961 transitions. Word has length 17 [2021-05-03 14:04:48,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:48,390 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 961 transitions. [2021-05-03 14:04:48,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:48,390 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 961 transitions. [2021-05-03 14:04:48,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:48,390 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:48,391 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:48,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-05-03 14:04:48,613 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:48,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:48,613 INFO L82 PathProgramCache]: Analyzing trace with hash -2021400276, now seen corresponding path program 51 times [2021-05-03 14:04:48,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:48,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382739381] [2021-05-03 14:04:48,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:48,667 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:48,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382739381] [2021-05-03 14:04:48,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785512465] [2021-05-03 14:04:48,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:48,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:04:48,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:48,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:04:48,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:48,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:48,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:04:48,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780251492] [2021-05-03 14:04:48,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:48,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:48,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:48,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:48,719 INFO L87 Difference]: Start difference. First operand 323 states and 961 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:48,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:48,793 INFO L93 Difference]: Finished difference Result 355 states and 1035 transitions. [2021-05-03 14:04:48,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:48,793 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:04:48,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:48,794 INFO L225 Difference]: With dead ends: 355 [2021-05-03 14:04:48,794 INFO L226 Difference]: Without dead ends: 351 [2021-05-03 14:04:48,794 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 87.4ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:04:48,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-05-03 14:04:48,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 323. [2021-05-03 14:04:48,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.981366459627329) internal successors, (960), 322 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:48,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 960 transitions. [2021-05-03 14:04:48,800 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 960 transitions. Word has length 17 [2021-05-03 14:04:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:48,800 INFO L480 AbstractCegarLoop]: Abstraction has 323 states and 960 transitions. [2021-05-03 14:04:48,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 960 transitions. [2021-05-03 14:04:48,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:48,801 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:48,801 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:49,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-05-03 14:04:49,009 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:49,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:49,009 INFO L82 PathProgramCache]: Analyzing trace with hash 339960316, now seen corresponding path program 52 times [2021-05-03 14:04:49,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:49,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171374832] [2021-05-03 14:04:49,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:49,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171374832] [2021-05-03 14:04:49,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602017144] [2021-05-03 14:04:49,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:49,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:49,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:49,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:04:49,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:49,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:49,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-05-03 14:04:49,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647792329] [2021-05-03 14:04:49,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:49,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:49,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:49,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:49,125 INFO L87 Difference]: Start difference. First operand 323 states and 960 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:49,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:49,169 INFO L93 Difference]: Finished difference Result 443 states and 1153 transitions. [2021-05-03 14:04:49,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:49,169 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:04:49,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:49,170 INFO L225 Difference]: With dead ends: 443 [2021-05-03 14:04:49,171 INFO L226 Difference]: Without dead ends: 443 [2021-05-03 14:04:49,171 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 55.3ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:49,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2021-05-03 14:04:49,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 330. [2021-05-03 14:04:49,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 3.0) internal successors, (987), 329 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:49,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 987 transitions. [2021-05-03 14:04:49,177 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 987 transitions. Word has length 17 [2021-05-03 14:04:49,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:49,177 INFO L480 AbstractCegarLoop]: Abstraction has 330 states and 987 transitions. [2021-05-03 14:04:49,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:49,177 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 987 transitions. [2021-05-03 14:04:49,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:49,177 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:49,178 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:49,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-05-03 14:04:49,395 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:49,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:49,395 INFO L82 PathProgramCache]: Analyzing trace with hash 2080052626, now seen corresponding path program 53 times [2021-05-03 14:04:49,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:49,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78155081] [2021-05-03 14:04:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:49,438 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:49,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78155081] [2021-05-03 14:04:49,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057197008] [2021-05-03 14:04:49,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:49,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:04:49,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:49,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:49,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:04:49,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:49,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-03 14:04:49,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057162187] [2021-05-03 14:04:49,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:49,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:49,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:49,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:49,494 INFO L87 Difference]: Start difference. First operand 330 states and 987 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:49,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:49,544 INFO L93 Difference]: Finished difference Result 430 states and 1125 transitions. [2021-05-03 14:04:49,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:04:49,545 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:04:49,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:49,546 INFO L225 Difference]: With dead ends: 430 [2021-05-03 14:04:49,546 INFO L226 Difference]: Without dead ends: 430 [2021-05-03 14:04:49,547 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:49,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-05-03 14:04:49,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 329. [2021-05-03 14:04:49,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9908536585365852) internal successors, (981), 328 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:49,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 981 transitions. [2021-05-03 14:04:49,553 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 981 transitions. Word has length 17 [2021-05-03 14:04:49,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:49,553 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 981 transitions. [2021-05-03 14:04:49,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:49,553 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 981 transitions. [2021-05-03 14:04:49,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:49,554 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:49,554 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:49,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:49,774 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:49,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:49,775 INFO L82 PathProgramCache]: Analyzing trace with hash -504301362, now seen corresponding path program 54 times [2021-05-03 14:04:49,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:49,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498186850] [2021-05-03 14:04:49,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:49,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498186850] [2021-05-03 14:04:49,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913918119] [2021-05-03 14:04:49,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:49,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:04:49,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:49,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:49,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:49,904 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:49,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:49,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-05-03 14:04:49,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334510876] [2021-05-03 14:04:49,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:04:49,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:49,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:04:49,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:49,905 INFO L87 Difference]: Start difference. First operand 329 states and 981 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:50,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:50,018 INFO L93 Difference]: Finished difference Result 428 states and 1117 transitions. [2021-05-03 14:04:50,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:50,018 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:04:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:50,020 INFO L225 Difference]: With dead ends: 428 [2021-05-03 14:04:50,020 INFO L226 Difference]: Without dead ends: 426 [2021-05-03 14:04:50,020 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:04:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-05-03 14:04:50,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 329. [2021-05-03 14:04:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9847560975609757) internal successors, (979), 328 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:50,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 979 transitions. [2021-05-03 14:04:50,026 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 979 transitions. Word has length 17 [2021-05-03 14:04:50,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:50,026 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 979 transitions. [2021-05-03 14:04:50,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:50,026 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 979 transitions. [2021-05-03 14:04:50,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:50,027 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:50,027 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:50,232 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:50,233 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:50,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:50,233 INFO L82 PathProgramCache]: Analyzing trace with hash 985103634, now seen corresponding path program 55 times [2021-05-03 14:04:50,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:50,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30214075] [2021-05-03 14:04:50,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:50,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30214075] [2021-05-03 14:04:50,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485193306] [2021-05-03 14:04:50,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:50,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:50,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:50,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:50,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-03 14:04:50,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818737055] [2021-05-03 14:04:50,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:50,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:50,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:50,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:50,324 INFO L87 Difference]: Start difference. First operand 329 states and 979 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:50,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:50,421 INFO L93 Difference]: Finished difference Result 433 states and 1122 transitions. [2021-05-03 14:04:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:04:50,422 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:04:50,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:50,423 INFO L225 Difference]: With dead ends: 433 [2021-05-03 14:04:50,423 INFO L226 Difference]: Without dead ends: 430 [2021-05-03 14:04:50,423 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:04:50,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-05-03 14:04:50,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 329. [2021-05-03 14:04:50,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.981707317073171) internal successors, (978), 328 states have internal predecessors, (978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:50,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 978 transitions. [2021-05-03 14:04:50,428 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 978 transitions. Word has length 17 [2021-05-03 14:04:50,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:50,428 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 978 transitions. [2021-05-03 14:04:50,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:50,428 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 978 transitions. [2021-05-03 14:04:50,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:50,429 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:50,429 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:50,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:50,651 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:50,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:50,651 INFO L82 PathProgramCache]: Analyzing trace with hash -87981746, now seen corresponding path program 56 times [2021-05-03 14:04:50,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:50,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199795836] [2021-05-03 14:04:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:50,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199795836] [2021-05-03 14:04:50,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860992171] [2021-05-03 14:04:50,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:50,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:50,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:50,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:50,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:50,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:50,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-03 14:04:50,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021636677] [2021-05-03 14:04:50,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:50,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:50,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:50,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:50,752 INFO L87 Difference]: Start difference. First operand 329 states and 978 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:50,838 INFO L93 Difference]: Finished difference Result 386 states and 1084 transitions. [2021-05-03 14:04:50,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:50,839 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:04:50,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:50,840 INFO L225 Difference]: With dead ends: 386 [2021-05-03 14:04:50,840 INFO L226 Difference]: Without dead ends: 383 [2021-05-03 14:04:50,840 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:50,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-05-03 14:04:50,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 329. [2021-05-03 14:04:50,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.9786585365853657) internal successors, (977), 328 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:50,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 977 transitions. [2021-05-03 14:04:50,846 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 977 transitions. Word has length 17 [2021-05-03 14:04:50,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:50,846 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 977 transitions. [2021-05-03 14:04:50,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:50,846 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 977 transitions. [2021-05-03 14:04:50,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:50,846 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:50,846 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:51,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:51,061 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:51,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1006109842, now seen corresponding path program 57 times [2021-05-03 14:04:51,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:51,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561883688] [2021-05-03 14:04:51,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:51,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:51,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561883688] [2021-05-03 14:04:51,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256155815] [2021-05-03 14:04:51,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:51,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:04:51,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:51,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:04:51,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:51,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:51,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-03 14:04:51,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389989392] [2021-05-03 14:04:51,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:51,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:51,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:51,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:51,162 INFO L87 Difference]: Start difference. First operand 329 states and 977 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:51,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:51,239 INFO L93 Difference]: Finished difference Result 385 states and 1081 transitions. [2021-05-03 14:04:51,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:04:51,239 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:04:51,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:51,240 INFO L225 Difference]: With dead ends: 385 [2021-05-03 14:04:51,240 INFO L226 Difference]: Without dead ends: 381 [2021-05-03 14:04:51,240 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 77.6ms TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-05-03 14:04:51,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 329. [2021-05-03 14:04:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.975609756097561) internal successors, (976), 328 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 976 transitions. [2021-05-03 14:04:51,245 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 976 transitions. Word has length 17 [2021-05-03 14:04:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:51,245 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 976 transitions. [2021-05-03 14:04:51,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:51,245 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 976 transitions. [2021-05-03 14:04:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:51,246 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:51,246 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:51,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-05-03 14:04:51,461 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:51,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:51,461 INFO L82 PathProgramCache]: Analyzing trace with hash 563210702, now seen corresponding path program 58 times [2021-05-03 14:04:51,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:51,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096973764] [2021-05-03 14:04:51,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:51,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:51,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096973764] [2021-05-03 14:04:51,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178729776] [2021-05-03 14:04:51,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:51,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:51,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:51,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:51,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:51,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:51,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-03 14:04:51,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971912560] [2021-05-03 14:04:51,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:51,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:51,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:51,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:51,550 INFO L87 Difference]: Start difference. First operand 329 states and 976 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:51,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:51,618 INFO L93 Difference]: Finished difference Result 372 states and 1066 transitions. [2021-05-03 14:04:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:51,619 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:04:51,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:51,620 INFO L225 Difference]: With dead ends: 372 [2021-05-03 14:04:51,620 INFO L226 Difference]: Without dead ends: 367 [2021-05-03 14:04:51,620 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 75.7ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:51,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-05-03 14:04:51,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 329. [2021-05-03 14:04:51,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.972560975609756) internal successors, (975), 328 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:51,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 975 transitions. [2021-05-03 14:04:51,624 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 975 transitions. Word has length 17 [2021-05-03 14:04:51,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:51,625 INFO L480 AbstractCegarLoop]: Abstraction has 329 states and 975 transitions. [2021-05-03 14:04:51,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:51,625 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 975 transitions. [2021-05-03 14:04:51,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:51,625 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:51,625 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:51,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-05-03 14:04:51,841 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:51,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:51,841 INFO L82 PathProgramCache]: Analyzing trace with hash -296506538, now seen corresponding path program 59 times [2021-05-03 14:04:51,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:51,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683557844] [2021-05-03 14:04:51,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:51,907 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:51,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683557844] [2021-05-03 14:04:51,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168006867] [2021-05-03 14:04:51,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:51,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:04:51,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:51,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:51,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:51,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:51,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-05-03 14:04:51,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628171237] [2021-05-03 14:04:51,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:51,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:51,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:51,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:51,962 INFO L87 Difference]: Start difference. First operand 329 states and 975 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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) [2021-05-03 14:04:52,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:52,026 INFO L93 Difference]: Finished difference Result 518 states and 1389 transitions. [2021-05-03 14:04:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:52,026 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 17 [2021-05-03 14:04:52,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:52,028 INFO L225 Difference]: With dead ends: 518 [2021-05-03 14:04:52,028 INFO L226 Difference]: Without dead ends: 518 [2021-05-03 14:04:52,028 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-05-03 14:04:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 384. [2021-05-03 14:04:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.0992167101827675) internal successors, (1187), 383 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:52,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1187 transitions. [2021-05-03 14:04:52,035 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1187 transitions. Word has length 17 [2021-05-03 14:04:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:52,035 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 1187 transitions. [2021-05-03 14:04:52,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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) [2021-05-03 14:04:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1187 transitions. [2021-05-03 14:04:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:52,036 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:52,036 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:52,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-05-03 14:04:52,249 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:52,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:52,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1140768216, now seen corresponding path program 60 times [2021-05-03 14:04:52,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:52,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934782480] [2021-05-03 14:04:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:52,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934782480] [2021-05-03 14:04:52,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071524059] [2021-05-03 14:04:52,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:04:52,315 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:04:52,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:52,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:04:52,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:52,351 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:52,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:52,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-03 14:04:52,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480388641] [2021-05-03 14:04:52,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:52,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:52,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:52,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:52,352 INFO L87 Difference]: Start difference. First operand 384 states and 1187 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:52,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:52,437 INFO L93 Difference]: Finished difference Result 496 states and 1356 transitions. [2021-05-03 14:04:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:04:52,438 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:04:52,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:52,439 INFO L225 Difference]: With dead ends: 496 [2021-05-03 14:04:52,439 INFO L226 Difference]: Without dead ends: 494 [2021-05-03 14:04:52,440 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:52,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-05-03 14:04:52,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 384. [2021-05-03 14:04:52,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 3.093994778067885) internal successors, (1185), 383 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:52,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 1185 transitions. [2021-05-03 14:04:52,446 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 1185 transitions. Word has length 17 [2021-05-03 14:04:52,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:52,446 INFO L480 AbstractCegarLoop]: Abstraction has 384 states and 1185 transitions. [2021-05-03 14:04:52,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:52,446 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 1185 transitions. [2021-05-03 14:04:52,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:52,447 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:52,447 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:52,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:52,661 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:52,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:52,661 INFO L82 PathProgramCache]: Analyzing trace with hash 348636780, now seen corresponding path program 61 times [2021-05-03 14:04:52,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:52,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716475220] [2021-05-03 14:04:52,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:52,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:52,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716475220] [2021-05-03 14:04:52,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818171505] [2021-05-03 14:04:52,707 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:52,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:52,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:52,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:52,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-05-03 14:04:52,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511458034] [2021-05-03 14:04:52,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:52,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:52,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:52,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:52,777 INFO L87 Difference]: Start difference. First operand 384 states and 1185 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:52,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:52,892 INFO L93 Difference]: Finished difference Result 501 states and 1361 transitions. [2021-05-03 14:04:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:52,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:04:52,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:52,894 INFO L225 Difference]: With dead ends: 501 [2021-05-03 14:04:52,894 INFO L226 Difference]: Without dead ends: 498 [2021-05-03 14:04:52,894 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:04:52,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-05-03 14:04:52,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 390. [2021-05-03 14:04:52,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.102827763496144) internal successors, (1207), 389 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:52,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1207 transitions. [2021-05-03 14:04:52,901 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1207 transitions. Word has length 17 [2021-05-03 14:04:52,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:52,901 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1207 transitions. [2021-05-03 14:04:52,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:52,901 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1207 transitions. [2021-05-03 14:04:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:52,901 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:52,902 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:53,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-05-03 14:04:53,121 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:53,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:53,121 INFO L82 PathProgramCache]: Analyzing trace with hash -724448600, now seen corresponding path program 62 times [2021-05-03 14:04:53,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:53,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849491321] [2021-05-03 14:04:53,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:53,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:53,168 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:53,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849491321] [2021-05-03 14:04:53,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699190862] [2021-05-03 14:04:53,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:53,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:53,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:53,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:53,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:53,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:53,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-05-03 14:04:53,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592934483] [2021-05-03 14:04:53,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:53,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:53,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:53,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:53,236 INFO L87 Difference]: Start difference. First operand 390 states and 1207 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:53,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:53,335 INFO L93 Difference]: Finished difference Result 453 states and 1323 transitions. [2021-05-03 14:04:53,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:04:53,335 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:04:53,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:53,336 INFO L225 Difference]: With dead ends: 453 [2021-05-03 14:04:53,336 INFO L226 Difference]: Without dead ends: 450 [2021-05-03 14:04:53,336 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:04:53,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-05-03 14:04:53,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 390. [2021-05-03 14:04:53,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.1002570694087406) internal successors, (1206), 389 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:53,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1206 transitions. [2021-05-03 14:04:53,343 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1206 transitions. Word has length 17 [2021-05-03 14:04:53,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:53,343 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1206 transitions. [2021-05-03 14:04:53,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1206 transitions. [2021-05-03 14:04:53,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:53,344 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:53,344 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:53,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:53,565 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:53,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:53,566 INFO L82 PathProgramCache]: Analyzing trace with hash 369642988, now seen corresponding path program 63 times [2021-05-03 14:04:53,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:53,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615715980] [2021-05-03 14:04:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:53,614 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 17 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:53,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615715980] [2021-05-03 14:04:53,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988410743] [2021-05-03 14:04:53,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:53,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:04:53,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:53,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:04:53,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:53,699 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:53,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:53,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-03 14:04:53,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822132878] [2021-05-03 14:04:53,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:53,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:53,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:53,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:53,701 INFO L87 Difference]: Start difference. First operand 390 states and 1206 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:53,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:53,793 INFO L93 Difference]: Finished difference Result 450 states and 1317 transitions. [2021-05-03 14:04:53,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:53,794 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:04:53,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:53,794 INFO L225 Difference]: With dead ends: 450 [2021-05-03 14:04:53,795 INFO L226 Difference]: Without dead ends: 446 [2021-05-03 14:04:53,795 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:04:53,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-05-03 14:04:53,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 390. [2021-05-03 14:04:53,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0976863753213366) internal successors, (1205), 389 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1205 transitions. [2021-05-03 14:04:53,799 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1205 transitions. Word has length 17 [2021-05-03 14:04:53,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:53,799 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1205 transitions. [2021-05-03 14:04:53,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1205 transitions. [2021-05-03 14:04:53,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:53,800 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:53,800 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:54,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-05-03 14:04:54,001 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:54,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:54,001 INFO L82 PathProgramCache]: Analyzing trace with hash -73256152, now seen corresponding path program 64 times [2021-05-03 14:04:54,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:54,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824953427] [2021-05-03 14:04:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:54,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824953427] [2021-05-03 14:04:54,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258639965] [2021-05-03 14:04:54,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:54,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:54,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:54,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:54,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:54,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:54,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-05-03 14:04:54,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328048414] [2021-05-03 14:04:54,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:54,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:54,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:54,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:54,119 INFO L87 Difference]: Start difference. First operand 390 states and 1205 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:54,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:54,206 INFO L93 Difference]: Finished difference Result 444 states and 1310 transitions. [2021-05-03 14:04:54,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:04:54,206 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:04:54,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:54,207 INFO L225 Difference]: With dead ends: 444 [2021-05-03 14:04:54,207 INFO L226 Difference]: Without dead ends: 439 [2021-05-03 14:04:54,207 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:04:54,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-05-03 14:04:54,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 390. [2021-05-03 14:04:54,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.095115681233933) internal successors, (1204), 389 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:54,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1204 transitions. [2021-05-03 14:04:54,216 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1204 transitions. Word has length 17 [2021-05-03 14:04:54,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:54,216 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1204 transitions. [2021-05-03 14:04:54,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:54,216 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1204 transitions. [2021-05-03 14:04:54,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:54,217 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:54,217 INFO L551 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:54,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-05-03 14:04:54,433 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:54,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:54,433 INFO L82 PathProgramCache]: Analyzing trace with hash -918227604, now seen corresponding path program 65 times [2021-05-03 14:04:54,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:54,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647197906] [2021-05-03 14:04:54,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:54,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647197906] [2021-05-03 14:04:54,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557357616] [2021-05-03 14:04:54,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:54,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:04:54,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:54,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-03 14:04:54,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:54,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:54,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-05-03 14:04:54,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537986261] [2021-05-03 14:04:54,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:54,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:54,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:54,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:54,546 INFO L87 Difference]: Start difference. First operand 390 states and 1204 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:54,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:54,631 INFO L93 Difference]: Finished difference Result 435 states and 1298 transitions. [2021-05-03 14:04:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:54,632 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-05-03 14:04:54,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:54,633 INFO L225 Difference]: With dead ends: 435 [2021-05-03 14:04:54,633 INFO L226 Difference]: Without dead ends: 429 [2021-05-03 14:04:54,633 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:54,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-03 14:04:54,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 390. [2021-05-03 14:04:54,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 3.0925449871465296) internal successors, (1203), 389 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:54,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 1203 transitions. [2021-05-03 14:04:54,637 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 1203 transitions. Word has length 17 [2021-05-03 14:04:54,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:54,637 INFO L480 AbstractCegarLoop]: Abstraction has 390 states and 1203 transitions. [2021-05-03 14:04:54,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:54,638 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 1203 transitions. [2021-05-03 14:04:54,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:04:54,638 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:54,638 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:54,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:54,842 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:54,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:54,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1606475449, now seen corresponding path program 66 times [2021-05-03 14:04:54,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:54,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659074606] [2021-05-03 14:04:54,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:54,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659074606] [2021-05-03 14:04:54,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173338846] [2021-05-03 14:04:54,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:54,966 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:04:54,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:54,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:04:54,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:55,052 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:55,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:55,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:04:55,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193040795] [2021-05-03 14:04:55,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:04:55,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:55,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:04:55,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:55,053 INFO L87 Difference]: Start difference. First operand 390 states and 1203 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:55,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:55,151 INFO L93 Difference]: Finished difference Result 721 states and 2125 transitions. [2021-05-03 14:04:55,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:55,152 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-05-03 14:04:55,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:55,153 INFO L225 Difference]: With dead ends: 721 [2021-05-03 14:04:55,153 INFO L226 Difference]: Without dead ends: 721 [2021-05-03 14:04:55,153 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:04:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-05-03 14:04:55,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 450. [2021-05-03 14:04:55,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 3.0423162583518932) internal successors, (1366), 449 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1366 transitions. [2021-05-03 14:04:55,163 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1366 transitions. Word has length 18 [2021-05-03 14:04:55,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:55,163 INFO L480 AbstractCegarLoop]: Abstraction has 450 states and 1366 transitions. [2021-05-03 14:04:55,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:55,163 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1366 transitions. [2021-05-03 14:04:55,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:04:55,164 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:55,164 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:55,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:55,364 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:55,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:55,365 INFO L82 PathProgramCache]: Analyzing trace with hash 79861465, now seen corresponding path program 67 times [2021-05-03 14:04:55,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:55,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583898704] [2021-05-03 14:04:55,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:55,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:55,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583898704] [2021-05-03 14:04:55,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796139945] [2021-05-03 14:04:55,464 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:55,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:04:55,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:55,605 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:55,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:55,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-05-03 14:04:55,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508098062] [2021-05-03 14:04:55,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:04:55,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:55,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:04:55,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:55,606 INFO L87 Difference]: Start difference. First operand 450 states and 1366 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:55,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:55,719 INFO L93 Difference]: Finished difference Result 819 states and 2401 transitions. [2021-05-03 14:04:55,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:55,719 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-03 14:04:55,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:55,721 INFO L225 Difference]: With dead ends: 819 [2021-05-03 14:04:55,721 INFO L226 Difference]: Without dead ends: 819 [2021-05-03 14:04:55,721 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-05-03 14:04:55,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 531. [2021-05-03 14:04:55,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 3.0018867924528303) internal successors, (1591), 530 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:55,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1591 transitions. [2021-05-03 14:04:55,730 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1591 transitions. Word has length 19 [2021-05-03 14:04:55,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:55,730 INFO L480 AbstractCegarLoop]: Abstraction has 531 states and 1591 transitions. [2021-05-03 14:04:55,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:55,731 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1591 transitions. [2021-05-03 14:04:55,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:55,731 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:55,732 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:55,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-05-03 14:04:55,946 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:55,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:55,946 INFO L82 PathProgramCache]: Analyzing trace with hash 816698247, now seen corresponding path program 68 times [2021-05-03 14:04:55,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:55,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581407710] [2021-05-03 14:04:55,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:56,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581407710] [2021-05-03 14:04:56,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760833177] [2021-05-03 14:04:56,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:04:56,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:56,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:56,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:04:56,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:56,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:56,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-05-03 14:04:56,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283364670] [2021-05-03 14:04:56,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:04:56,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:56,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:04:56,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:04:56,294 INFO L87 Difference]: Start difference. First operand 531 states and 1591 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:56,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:56,472 INFO L93 Difference]: Finished difference Result 928 states and 2706 transitions. [2021-05-03 14:04:56,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:56,472 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-05-03 14:04:56,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:56,474 INFO L225 Difference]: With dead ends: 928 [2021-05-03 14:04:56,474 INFO L226 Difference]: Without dead ends: 927 [2021-05-03 14:04:56,474 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 288.7ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:04:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-05-03 14:04:56,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 625. [2021-05-03 14:04:56,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 2.9791666666666665) internal successors, (1859), 624 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1859 transitions. [2021-05-03 14:04:56,484 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1859 transitions. Word has length 20 [2021-05-03 14:04:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:56,484 INFO L480 AbstractCegarLoop]: Abstraction has 625 states and 1859 transitions. [2021-05-03 14:04:56,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1859 transitions. [2021-05-03 14:04:56,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:04:56,485 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:56,485 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:56,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-05-03 14:04:56,686 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:56,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:56,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2111165287, now seen corresponding path program 69 times [2021-05-03 14:04:56,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:56,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666734729] [2021-05-03 14:04:56,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:56,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666734729] [2021-05-03 14:04:56,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684980003] [2021-05-03 14:04:56,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:56,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:04:56,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:56,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:04:56,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:57,207 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-05-03 14:04:57,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:57,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-05-03 14:05:01,306 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 796 DAG size of output: 651 [2021-05-03 14:05:03,660 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 898 DAG size of output: 723 [2021-05-03 14:05:03,795 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1020 DAG size of output: 784 [2021-05-03 14:05:03,998 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 1649 DAG size of output: 1266 [2021-05-03 14:05:09,003 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 1709 DAG size of output: 1349 [2021-05-03 14:05:09,213 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 1827 DAG size of output: 1456 [2021-05-03 14:05:09,695 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 2941 DAG size of output: 2181 [2021-05-03 14:05:10,133 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 3088 DAG size of output: 2279 [2021-05-03 14:05:10,664 WARN L205 SmtUtils]: Spent 517.00 ms on a formula simplification. DAG size of input: 3292 DAG size of output: 2454 [2021-05-03 14:05:11,183 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 3585 DAG size of output: 2698 [2021-05-03 14:05:11,725 WARN L205 SmtUtils]: Spent 527.00 ms on a formula simplification. DAG size of input: 3585 DAG size of output: 2698 [2021-05-03 14:05:12,390 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 3596 DAG size of output: 2709 [2021-05-03 14:05:12,757 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 2705 DAG size of output: 2633 [2021-05-03 14:05:13,215 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 2635 DAG size of output: 3000 [2021-05-03 14:05:13,419 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 1827 DAG size of output: 1813 [2021-05-03 14:05:14,084 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 1619 DAG size of output: 1889 [2021-05-03 14:05:14,364 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification that was a NOOP. DAG size: 1527 [2021-05-03 14:05:14,651 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 1467 DAG size of output: 1622 [2021-05-03 14:05:14,765 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1125 DAG size of output: 1120 [2021-05-03 14:05:14,903 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 1087 [2021-05-03 14:05:16,663 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 976 DAG size of output: 750 [2021-05-03 14:05:16,799 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1446 DAG size of output: 996 [2021-05-03 14:05:16,962 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 1473 DAG size of output: 1022 [2021-05-03 14:05:17,099 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 718 DAG size of output: 782 [2021-05-03 14:05:18,965 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1056 DAG size of output: 616 [2021-05-03 14:05:19,180 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 2348 DAG size of output: 1371 [2021-05-03 14:05:19,426 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 2424 DAG size of output: 1416 [2021-05-03 14:05:19,743 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 838 DAG size of output: 838 [2021-05-03 14:05:22,050 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 3137 DAG size of output: 1632 [2021-05-03 14:05:22,413 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 3506 DAG size of output: 1830 [2021-05-03 14:05:22,547 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1373 DAG size of output: 1212 [2021-05-03 14:05:22,782 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 1064 DAG size of output: 1236 [2021-05-03 14:05:23,945 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 947 DAG size of output: 1017 [2021-05-03 14:05:26,163 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1758 DAG size of output: 848 [2021-05-03 14:05:26,309 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1940 DAG size of output: 972 [2021-05-03 14:05:26,800 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 5222 DAG size of output: 2568 [2021-05-03 14:05:27,318 WARN L205 SmtUtils]: Spent 499.00 ms on a formula simplification. DAG size of input: 5222 DAG size of output: 2568 [2021-05-03 14:05:28,109 WARN L205 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 5229 DAG size of output: 2930 [2021-05-03 14:05:28,307 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 2001 DAG size of output: 1359 [2021-05-03 14:05:28,457 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 1121 DAG size of output: 831 [2021-05-03 14:05:29,358 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1231 DAG size of output: 764 [2021-05-03 14:05:30,272 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1668 DAG size of output: 873 [2021-05-03 14:05:30,400 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1668 DAG size of output: 873 [2021-05-03 14:05:30,540 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 1674 DAG size of output: 879 [2021-05-03 14:05:30,650 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 877 DAG size of output: 827 [2021-05-03 14:05:30,801 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 829 DAG size of output: 893 [2021-05-03 14:05:32,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:32,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:32,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:32,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-05-03 14:05:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:32,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:32,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-05-03 14:05:32,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072979911] [2021-05-03 14:05:32,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:05:32,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:32,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:05:32,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:32,641 INFO L87 Difference]: Start difference. First operand 625 states and 1859 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 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) [2021-05-03 14:05:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:32,922 INFO L93 Difference]: Finished difference Result 848 states and 2360 transitions. [2021-05-03 14:05:32,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:05:32,923 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 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 21 [2021-05-03 14:05:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:32,924 INFO L225 Difference]: With dead ends: 848 [2021-05-03 14:05:32,924 INFO L226 Difference]: Without dead ends: 845 [2021-05-03 14:05:32,924 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:32,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2021-05-03 14:05:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 721. [2021-05-03 14:05:32,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 720 states have (on average 3.0319444444444446) internal successors, (2183), 720 states have internal predecessors, (2183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 2183 transitions. [2021-05-03 14:05:32,932 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 2183 transitions. Word has length 21 [2021-05-03 14:05:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:32,932 INFO L480 AbstractCegarLoop]: Abstraction has 721 states and 2183 transitions. [2021-05-03 14:05:32,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 24 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) [2021-05-03 14:05:32,933 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 2183 transitions. [2021-05-03 14:05:32,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:32,933 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:32,933 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:33,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-05-03 14:05:33,145 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:33,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:33,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1684323737, now seen corresponding path program 70 times [2021-05-03 14:05:33,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:33,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059893900] [2021-05-03 14:05:33,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:33,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059893900] [2021-05-03 14:05:33,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357052240] [2021-05-03 14:05:33,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:05:33,292 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:33,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:33,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:33,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:33,774 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-05-03 14:05:33,775 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:33,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-05-03 14:05:39,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:39,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:39,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:39,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-05-03 14:05:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:39,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:39,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-05-03 14:05:39,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245964121] [2021-05-03 14:05:39,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:05:39,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:39,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:05:39,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:39,416 INFO L87 Difference]: Start difference. First operand 721 states and 2183 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:05:39,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:39,749 INFO L93 Difference]: Finished difference Result 961 states and 2736 transitions. [2021-05-03 14:05:39,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:05:39,749 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-05-03 14:05:39,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:39,751 INFO L225 Difference]: With dead ends: 961 [2021-05-03 14:05:39,752 INFO L226 Difference]: Without dead ends: 958 [2021-05-03 14:05:39,752 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 301.2ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:39,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2021-05-03 14:05:39,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 809. [2021-05-03 14:05:39,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 3.1014851485148514) internal successors, (2506), 808 states have internal predecessors, (2506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:39,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 2506 transitions. [2021-05-03 14:05:39,766 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 2506 transitions. Word has length 21 [2021-05-03 14:05:39,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:39,766 INFO L480 AbstractCegarLoop]: Abstraction has 809 states and 2506 transitions. [2021-05-03 14:05:39,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:05:39,766 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 2506 transitions. [2021-05-03 14:05:39,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:39,767 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:39,767 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:39,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5711,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:39,989 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:39,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:39,989 INFO L82 PathProgramCache]: Analyzing trace with hash 161319513, now seen corresponding path program 71 times [2021-05-03 14:05:39,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:39,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399221370] [2021-05-03 14:05:39,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:40,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399221370] [2021-05-03 14:05:40,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955124933] [2021-05-03 14:05:40,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:40,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:05:40,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:40,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:40,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:40,632 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-05-03 14:05:40,632 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:40,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-05-03 14:05:43,350 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1235 DAG size of output: 732 [2021-05-03 14:05:43,524 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1235 DAG size of output: 732 [2021-05-03 14:05:43,758 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 1243 DAG size of output: 825 [2021-05-03 14:05:45,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:45,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:45,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:45,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-05-03 14:05:45,410 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:45,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:45,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-05-03 14:05:45,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734744892] [2021-05-03 14:05:45,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:05:45,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:45,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:05:45,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:45,411 INFO L87 Difference]: Start difference. First operand 809 states and 2506 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:05:45,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:45,724 INFO L93 Difference]: Finished difference Result 1077 states and 3152 transitions. [2021-05-03 14:05:45,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:05:45,724 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-05-03 14:05:45,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:45,726 INFO L225 Difference]: With dead ends: 1077 [2021-05-03 14:05:45,726 INFO L226 Difference]: Without dead ends: 1074 [2021-05-03 14:05:45,727 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 310.5ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:45,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1074 states. [2021-05-03 14:05:45,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1074 to 915. [2021-05-03 14:05:45,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 3.1783369803063457) internal successors, (2905), 914 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:45,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2905 transitions. [2021-05-03 14:05:45,738 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2905 transitions. Word has length 21 [2021-05-03 14:05:45,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:45,738 INFO L480 AbstractCegarLoop]: Abstraction has 915 states and 2905 transitions. [2021-05-03 14:05:45,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:05:45,738 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2905 transitions. [2021-05-03 14:05:45,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:45,740 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:45,740 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:45,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6755,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:45,961 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:45,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:45,961 INFO L82 PathProgramCache]: Analyzing trace with hash 192828825, now seen corresponding path program 72 times [2021-05-03 14:05:45,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:45,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357708443] [2021-05-03 14:05:45,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:46,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357708443] [2021-05-03 14:05:46,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392561586] [2021-05-03 14:05:46,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:05:46,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:05:46,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:46,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:46,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:46,521 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-05-03 14:05:46,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:46,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-05-03 14:05:49,111 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 887 DAG size of output: 1169 [2021-05-03 14:05:51,396 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 1265 DAG size of output: 889 [2021-05-03 14:05:51,528 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1631 DAG size of output: 1260 [2021-05-03 14:05:51,674 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 1696 DAG size of output: 1321 [2021-05-03 14:05:53,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:53,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:53,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:53,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-05-03 14:05:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:53,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:53,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-05-03 14:05:53,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087361258] [2021-05-03 14:05:53,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:05:53,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:53,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:05:53,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:53,070 INFO L87 Difference]: Start difference. First operand 915 states and 2905 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:05:53,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:53,395 INFO L93 Difference]: Finished difference Result 1209 states and 3643 transitions. [2021-05-03 14:05:53,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:05:53,396 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-05-03 14:05:53,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:53,399 INFO L225 Difference]: With dead ends: 1209 [2021-05-03 14:05:53,399 INFO L226 Difference]: Without dead ends: 1206 [2021-05-03 14:05:53,399 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 255.5ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:53,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-05-03 14:05:53,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1042. [2021-05-03 14:05:53,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 3.2526416906820366) internal successors, (3386), 1041 states have internal predecessors, (3386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:53,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 3386 transitions. [2021-05-03 14:05:53,439 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 3386 transitions. Word has length 21 [2021-05-03 14:05:53,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:53,439 INFO L480 AbstractCegarLoop]: Abstraction has 1042 states and 3386 transitions. [2021-05-03 14:05:53,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:05:53,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 3386 transitions. [2021-05-03 14:05:53,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:53,440 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:53,440 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:53,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7547,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:53,658 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:53,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:53,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1169617497, now seen corresponding path program 73 times [2021-05-03 14:05:53,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:53,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479993227] [2021-05-03 14:05:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:53,752 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:53,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479993227] [2021-05-03 14:05:53,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431873506] [2021-05-03 14:05:53,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:53,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:53,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:05:53,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:54,214 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-05-03 14:05:54,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:54,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-05-03 14:05:56,593 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 911 DAG size of output: 653 [2021-05-03 14:05:57,241 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 625 DAG size of output: 496 [2021-05-03 14:05:58,864 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1086 DAG size of output: 549 [2021-05-03 14:05:59,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:05:59,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:05:59,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:05:59,295 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-05-03 14:05:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:59,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:59,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-05-03 14:05:59,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919635606] [2021-05-03 14:05:59,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:05:59,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:59,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:05:59,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:59,302 INFO L87 Difference]: Start difference. First operand 1042 states and 3386 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:05:59,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:59,652 INFO L93 Difference]: Finished difference Result 1356 states and 4198 transitions. [2021-05-03 14:05:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:05:59,652 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-05-03 14:05:59,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:59,671 INFO L225 Difference]: With dead ends: 1356 [2021-05-03 14:05:59,671 INFO L226 Difference]: Without dead ends: 1353 [2021-05-03 14:05:59,672 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 283.0ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:59,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-05-03 14:05:59,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1190. [2021-05-03 14:05:59,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 3.3187552565180822) internal successors, (3946), 1189 states have internal predecessors, (3946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:59,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3946 transitions. [2021-05-03 14:05:59,714 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3946 transitions. Word has length 21 [2021-05-03 14:05:59,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:59,714 INFO L480 AbstractCegarLoop]: Abstraction has 1190 states and 3946 transitions. [2021-05-03 14:05:59,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:05:59,714 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3946 transitions. [2021-05-03 14:05:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:59,716 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:59,716 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:59,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9519 [2021-05-03 14:05:59,937 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:59,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:59,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1385295257, now seen corresponding path program 74 times [2021-05-03 14:05:59,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:59,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294216144] [2021-05-03 14:05:59,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:59,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:06:00,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294216144] [2021-05-03 14:06:00,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191891760] [2021-05-03 14:06:00,039 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:06:00,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:00,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:00,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:06:00,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:00,562 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-05-03 14:06:00,563 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:00,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-05-03 14:06:04,107 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1260 DAG size of output: 989 [2021-05-03 14:06:06,971 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1458 DAG size of output: 1102 [2021-05-03 14:06:07,268 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 2432 DAG size of output: 1780 [2021-05-03 14:06:07,604 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 2651 DAG size of output: 1861 [2021-05-03 14:06:09,901 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 1919 DAG size of output: 1170 [2021-05-03 14:06:11,770 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1619 DAG size of output: 1042 [2021-05-03 14:06:12,058 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 3005 DAG size of output: 1691 [2021-05-03 14:06:12,661 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 3145 DAG size of output: 1767 [2021-05-03 14:06:13,155 WARN L205 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 5592 DAG size of output: 2288 [2021-05-03 14:06:13,653 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 5592 DAG size of output: 2288 [2021-05-03 14:06:14,187 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 5603 DAG size of output: 2299 [2021-05-03 14:06:14,487 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 2295 DAG size of output: 2140 [2021-05-03 14:06:14,905 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 2142 DAG size of output: 2377 [2021-05-03 14:06:15,115 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 1257 DAG size of output: 1316 [2021-05-03 14:06:15,251 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 813 DAG size of output: 799 [2021-05-03 14:06:15,932 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 859 DAG size of output: 1106 [2021-05-03 14:06:16,760 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 1057 DAG size of output: 811 [2021-05-03 14:06:16,934 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 1541 DAG size of output: 1180 [2021-05-03 14:06:17,235 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 1643 DAG size of output: 1788 [2021-05-03 14:06:17,376 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1187 DAG size of output: 1174 [2021-05-03 14:06:17,666 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1187 DAG size of output: 882 [2021-05-03 14:06:17,785 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1082 DAG size of output: 1081 [2021-05-03 14:06:18,322 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 1762 DAG size of output: 1332 [2021-05-03 14:06:18,701 WARN L205 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 2764 DAG size of output: 1890 [2021-05-03 14:06:19,084 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 2764 DAG size of output: 1890 [2021-05-03 14:06:19,422 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 2773 DAG size of output: 1572 [2021-05-03 14:06:20,227 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1411 DAG size of output: 823 [2021-05-03 14:06:20,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:20,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:20,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:06:20,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-05-03 14:06:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:20,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:20,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-05-03 14:06:20,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35748434] [2021-05-03 14:06:20,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:06:20,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:20,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:06:20,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:20,850 INFO L87 Difference]: Start difference. First operand 1190 states and 3946 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:06:21,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:21,199 INFO L93 Difference]: Finished difference Result 1521 states and 4814 transitions. [2021-05-03 14:06:21,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:06:21,200 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-05-03 14:06:21,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:21,204 INFO L225 Difference]: With dead ends: 1521 [2021-05-03 14:06:21,204 INFO L226 Difference]: Without dead ends: 1518 [2021-05-03 14:06:21,204 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 276.6ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:21,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2021-05-03 14:06:21,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 1352. [2021-05-03 14:06:21,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 3.37379718726869) internal successors, (4558), 1351 states have internal predecessors, (4558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 4558 transitions. [2021-05-03 14:06:21,233 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 4558 transitions. Word has length 21 [2021-05-03 14:06:21,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:21,233 INFO L480 AbstractCegarLoop]: Abstraction has 1352 states and 4558 transitions. [2021-05-03 14:06:21,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:06:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 4558 transitions. [2021-05-03 14:06:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:21,235 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:21,235 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:21,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10479,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:21,453 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:21,454 INFO L82 PathProgramCache]: Analyzing trace with hash -518628775, now seen corresponding path program 75 times [2021-05-03 14:06:21,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:21,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641361175] [2021-05-03 14:06:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:21,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641361175] [2021-05-03 14:06:21,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197409026] [2021-05-03 14:06:21,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:21,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:06:21,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:21,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:06:21,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:22,284 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-05-03 14:06:22,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:22,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-05-03 14:06:27,448 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 1265 DAG size of output: 1042 [2021-05-03 14:06:27,710 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 1359 DAG size of output: 1124 [2021-05-03 14:06:27,958 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 1398 DAG size of output: 1148 [2021-05-03 14:06:29,990 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 933 DAG size of output: 719 [2021-05-03 14:06:31,887 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 940 DAG size of output: 720 [2021-05-03 14:06:32,121 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 1490 DAG size of output: 1162 [2021-05-03 14:06:32,377 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 1524 DAG size of output: 1181 [2021-05-03 14:06:32,691 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 1695 DAG size of output: 1324 [2021-05-03 14:06:33,214 WARN L205 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 2739 DAG size of output: 2103 [2021-05-03 14:06:33,759 WARN L205 SmtUtils]: Spent 528.00 ms on a formula simplification. DAG size of input: 2879 DAG size of output: 2212 [2021-05-03 14:06:34,396 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification. DAG size of input: 3145 DAG size of output: 2364 [2021-05-03 14:06:34,995 WARN L205 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 3145 DAG size of output: 2364 [2021-05-03 14:06:35,667 WARN L205 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 3156 DAG size of output: 2375 [2021-05-03 14:06:36,300 WARN L205 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 2377 DAG size of output: 3005 [2021-05-03 14:06:36,798 WARN L205 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 2174 DAG size of output: 2299 [2021-05-03 14:06:36,941 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1162 DAG size of output: 1155 [2021-05-03 14:06:37,063 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 649 DAG size of output: 916 [2021-05-03 14:06:37,936 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1216 DAG size of output: 905 [2021-05-03 14:06:38,134 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 1719 DAG size of output: 1081 [2021-05-03 14:06:38,482 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 1576 DAG size of output: 1742 [2021-05-03 14:06:38,683 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 868 DAG size of output: 1263 [2021-05-03 14:06:38,837 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 855 DAG size of output: 1035 [2021-05-03 14:06:39,543 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 1470 DAG size of output: 1080 [2021-05-03 14:06:39,895 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 2578 DAG size of output: 1882 [2021-05-03 14:06:40,424 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification. DAG size of input: 3830 DAG size of output: 2565 [2021-05-03 14:06:40,652 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 1082 DAG size of output: 1190 [2021-05-03 14:06:40,892 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 809 DAG size of output: 1050 [2021-05-03 14:06:41,078 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 796 DAG size of output: 1170 [2021-05-03 14:06:41,952 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1117 DAG size of output: 791 [2021-05-03 14:06:42,073 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1651 DAG size of output: 710 [2021-05-03 14:06:42,211 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 655 DAG size of output: 913 [2021-05-03 14:06:43,004 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 2210 DAG size of output: 887 [2021-05-03 14:06:43,692 WARN L205 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 5760 DAG size of output: 2544 [2021-05-03 14:06:44,336 WARN L205 SmtUtils]: Spent 621.00 ms on a formula simplification. DAG size of input: 5760 DAG size of output: 2544 [2021-05-03 14:06:45,067 WARN L205 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 5765 DAG size of output: 2549 [2021-05-03 14:06:45,363 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 2551 DAG size of output: 1598 [2021-05-03 14:06:45,669 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 1107 DAG size of output: 1063 [2021-05-03 14:06:47,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:47,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:47,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:06:47,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-05-03 14:06:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:47,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:47,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-05-03 14:06:47,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594920260] [2021-05-03 14:06:47,101 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:06:47,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:47,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:06:47,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:47,101 INFO L87 Difference]: Start difference. First operand 1352 states and 4558 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:06:47,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:47,382 INFO L93 Difference]: Finished difference Result 1650 states and 5275 transitions. [2021-05-03 14:06:47,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:06:47,383 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-05-03 14:06:47,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:47,386 INFO L225 Difference]: With dead ends: 1650 [2021-05-03 14:06:47,386 INFO L226 Difference]: Without dead ends: 1647 [2021-05-03 14:06:47,386 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 509.6ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-05-03 14:06:47,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1485. [2021-05-03 14:06:47,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 3.391509433962264) internal successors, (5033), 1484 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:47,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 5033 transitions. [2021-05-03 14:06:47,410 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 5033 transitions. Word has length 21 [2021-05-03 14:06:47,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:47,410 INFO L480 AbstractCegarLoop]: Abstraction has 1485 states and 5033 transitions. [2021-05-03 14:06:47,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:06:47,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 5033 transitions. [2021-05-03 14:06:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:47,413 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:47,413 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:47,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13220,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:47,635 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:47,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:47,635 INFO L82 PathProgramCache]: Analyzing trace with hash 589268377, now seen corresponding path program 76 times [2021-05-03 14:06:47,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:47,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621382975] [2021-05-03 14:06:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:47,715 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:47,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621382975] [2021-05-03 14:06:47,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218103735] [2021-05-03 14:06:47,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:47,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:47,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:47,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:06:47,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:48,188 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-05-03 14:06:48,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:48,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-05-03 14:06:51,678 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1375 DAG size of output: 948 [2021-05-03 14:06:51,978 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 2094 DAG size of output: 1410 [2021-05-03 14:06:52,216 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 2094 DAG size of output: 1410 [2021-05-03 14:06:52,454 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 2101 DAG size of output: 1417 [2021-05-03 14:06:52,631 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 1417 DAG size of output: 1352 [2021-05-03 14:06:55,895 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1475 DAG size of output: 694 [2021-05-03 14:06:56,018 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1475 DAG size of output: 694 [2021-05-03 14:06:56,143 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1480 DAG size of output: 699 [2021-05-03 14:06:57,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:06:57,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:57,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:06:57,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-05-03 14:06:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:57,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:57,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-05-03 14:06:57,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685946449] [2021-05-03 14:06:57,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:06:57,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:57,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:06:57,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:57,859 INFO L87 Difference]: Start difference. First operand 1485 states and 5033 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:06:58,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:58,150 INFO L93 Difference]: Finished difference Result 1787 states and 5757 transitions. [2021-05-03 14:06:58,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:06:58,151 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-05-03 14:06:58,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:58,154 INFO L225 Difference]: With dead ends: 1787 [2021-05-03 14:06:58,154 INFO L226 Difference]: Without dead ends: 1784 [2021-05-03 14:06:58,154 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 279.9ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:58,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1784 states. [2021-05-03 14:06:58,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1784 to 1621. [2021-05-03 14:06:58,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.404938271604938) internal successors, (5516), 1620 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5516 transitions. [2021-05-03 14:06:58,183 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5516 transitions. Word has length 21 [2021-05-03 14:06:58,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:58,184 INFO L480 AbstractCegarLoop]: Abstraction has 1621 states and 5516 transitions. [2021-05-03 14:06:58,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:06:58,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5516 transitions. [2021-05-03 14:06:58,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:58,186 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:58,186 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:58,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17215 [2021-05-03 14:06:58,408 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:58,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:58,408 INFO L82 PathProgramCache]: Analyzing trace with hash 574341721, now seen corresponding path program 77 times [2021-05-03 14:06:58,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:58,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616815229] [2021-05-03 14:06:58,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:58,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:58,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616815229] [2021-05-03 14:06:58,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954447999] [2021-05-03 14:06:58,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:58,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:06:58,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:58,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:06:58,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:59,152 WARN L205 SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-05-03 14:06:59,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:59,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-05-03 14:07:04,945 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:04,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:04,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:04,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-05-03 14:07:04,952 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:04,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:04,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-05-03 14:07:04,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861943146] [2021-05-03 14:07:04,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:07:04,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:04,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:07:04,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:07:04,954 INFO L87 Difference]: Start difference. First operand 1621 states and 5516 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:07:05,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:05,290 INFO L93 Difference]: Finished difference Result 1931 states and 6243 transitions. [2021-05-03 14:07:05,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:07:05,291 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-05-03 14:07:05,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:05,293 INFO L225 Difference]: With dead ends: 1931 [2021-05-03 14:07:05,293 INFO L226 Difference]: Without dead ends: 1928 [2021-05-03 14:07:05,294 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 273.3ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:07:05,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1928 states. [2021-05-03 14:07:05,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1928 to 1762. [2021-05-03 14:07:05,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 3.4077228847245884) internal successors, (6001), 1761 states have internal predecessors, (6001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:05,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 6001 transitions. [2021-05-03 14:07:05,314 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 6001 transitions. Word has length 21 [2021-05-03 14:07:05,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:05,314 INFO L480 AbstractCegarLoop]: Abstraction has 1762 states and 6001 transitions. [2021-05-03 14:07:05,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:07:05,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 6001 transitions. [2021-05-03 14:07:05,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:07:05,317 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:05,317 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:05,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18944,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:05,528 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:05,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:05,528 INFO L82 PathProgramCache]: Analyzing trace with hash 111615385, now seen corresponding path program 78 times [2021-05-03 14:07:05,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:05,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854881328] [2021-05-03 14:07:05,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:05,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854881328] [2021-05-03 14:07:05,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532234960] [2021-05-03 14:07:05,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:05,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:07:05,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:05,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-03 14:07:05,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:05,979 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-05-03 14:07:05,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:05,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-05-03 14:07:06,800 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 631 [2021-05-03 14:07:08,199 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 656 DAG size of output: 448 [2021-05-03 14:07:09,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:09,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:09,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:09,801 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-05-03 14:07:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:09,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:09,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-05-03 14:07:09,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267618736] [2021-05-03 14:07:09,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:07:09,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:09,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:07:09,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:07:09,808 INFO L87 Difference]: Start difference. First operand 1762 states and 6001 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:07:10,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:10,094 INFO L93 Difference]: Finished difference Result 2066 states and 6683 transitions. [2021-05-03 14:07:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:07:10,094 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-05-03 14:07:10,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:10,097 INFO L225 Difference]: With dead ends: 2066 [2021-05-03 14:07:10,097 INFO L226 Difference]: Without dead ends: 2063 [2021-05-03 14:07:10,097 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 223.7ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:07:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-05-03 14:07:10,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1892. [2021-05-03 14:07:10,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.4045478582760444) internal successors, (6438), 1891 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:10,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6438 transitions. [2021-05-03 14:07:10,120 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6438 transitions. Word has length 21 [2021-05-03 14:07:10,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:10,120 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 6438 transitions. [2021-05-03 14:07:10,120 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:07:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6438 transitions. [2021-05-03 14:07:10,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:07:10,122 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:10,122 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:10,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20920,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:10,323 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:10,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:10,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1347999143, now seen corresponding path program 79 times [2021-05-03 14:07:10,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:10,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906195120] [2021-05-03 14:07:10,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:10,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906195120] [2021-05-03 14:07:10,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63917467] [2021-05-03 14:07:10,424 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:07:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:10,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-03 14:07:10,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:10,831 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-05-03 14:07:10,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:10,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-05-03 14:07:14,633 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1888 DAG size of output: 1020 [2021-05-03 14:07:15,513 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 2246 DAG size of output: 1172 [2021-05-03 14:07:15,695 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 2303 DAG size of output: 1202 [2021-05-03 14:07:15,878 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 2303 DAG size of output: 1202 [2021-05-03 14:07:16,062 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 2310 DAG size of output: 1209 [2021-05-03 14:07:16,234 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 1211 DAG size of output: 1335 [2021-05-03 14:07:17,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:07:17,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:07:17,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:07:17,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-05-03 14:07:17,689 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:17,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:17,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-05-03 14:07:17,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825424360] [2021-05-03 14:07:17,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-03 14:07:17,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:17,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-03 14:07:17,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:07:17,690 INFO L87 Difference]: Start difference. First operand 1892 states and 6438 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:07:18,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:18,065 INFO L93 Difference]: Finished difference Result 2152 states and 7005 transitions. [2021-05-03 14:07:18,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:07:18,066 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 21 [2021-05-03 14:07:18,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:18,070 INFO L225 Difference]: With dead ends: 2152 [2021-05-03 14:07:18,070 INFO L226 Difference]: Without dead ends: 2149 [2021-05-03 14:07:18,070 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 242.4ms TimeCoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:07:18,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2149 states. [2021-05-03 14:07:18,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2149 to 1999. [2021-05-03 14:07:18,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1998 states have (on average 3.403903903903904) internal successors, (6801), 1998 states have internal predecessors, (6801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:18,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 6801 transitions. [2021-05-03 14:07:18,103 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 6801 transitions. Word has length 21 [2021-05-03 14:07:18,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:18,103 INFO L480 AbstractCegarLoop]: Abstraction has 1999 states and 6801 transitions. [2021-05-03 14:07:18,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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) [2021-05-03 14:07:18,104 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 6801 transitions. [2021-05-03 14:07:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:18,107 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:18,107 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:18,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22169 [2021-05-03 14:07:18,327 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:18,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:18,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1614345671, now seen corresponding path program 80 times [2021-05-03 14:07:18,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:18,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804094017] [2021-05-03 14:07:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:18,421 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:18,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804094017] [2021-05-03 14:07:18,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475184280] [2021-05-03 14:07:18,421 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:18,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:18,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:18,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:18,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:18,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:18,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:07:18,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705797001] [2021-05-03 14:07:18,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:07:18,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:18,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:07:18,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:07:18,496 INFO L87 Difference]: Start difference. First operand 1999 states and 6801 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:18,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:18,710 INFO L93 Difference]: Finished difference Result 2169 states and 6986 transitions. [2021-05-03 14:07:18,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:07:18,711 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:18,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:18,714 INFO L225 Difference]: With dead ends: 2169 [2021-05-03 14:07:18,714 INFO L226 Difference]: Without dead ends: 2169 [2021-05-03 14:07:18,714 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 197.0ms TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:07:18,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2169 states. [2021-05-03 14:07:18,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2169 to 1932. [2021-05-03 14:07:18,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1932 states, 1931 states have (on average 3.3858104609010877) internal successors, (6538), 1931 states have internal predecessors, (6538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:18,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1932 states to 1932 states and 6538 transitions. [2021-05-03 14:07:18,748 INFO L78 Accepts]: Start accepts. Automaton has 1932 states and 6538 transitions. Word has length 22 [2021-05-03 14:07:18,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:18,748 INFO L480 AbstractCegarLoop]: Abstraction has 1932 states and 6538 transitions. [2021-05-03 14:07:18,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:18,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1932 states and 6538 transitions. [2021-05-03 14:07:18,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:18,751 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:18,751 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:18,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24498 [2021-05-03 14:07:18,972 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:18,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:18,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1020889444, now seen corresponding path program 81 times [2021-05-03 14:07:18,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:18,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820024023] [2021-05-03 14:07:18,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:18,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:19,064 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:19,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820024023] [2021-05-03 14:07:19,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634981762] [2021-05-03 14:07:19,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:19,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:07:19,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:19,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:19,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:19,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:19,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:07:19,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305994988] [2021-05-03 14:07:19,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:07:19,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:19,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:07:19,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:07:19,141 INFO L87 Difference]: Start difference. First operand 1932 states and 6538 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:19,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:19,446 INFO L93 Difference]: Finished difference Result 2262 states and 7074 transitions. [2021-05-03 14:07:19,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 14:07:19,447 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:19,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:19,449 INFO L225 Difference]: With dead ends: 2262 [2021-05-03 14:07:19,449 INFO L226 Difference]: Without dead ends: 2255 [2021-05-03 14:07:19,449 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 260.0ms TimeCoverageRelationStatistics Valid=476, Invalid=930, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:07:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2255 states. [2021-05-03 14:07:19,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2255 to 1969. [2021-05-03 14:07:19,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.374491869918699) internal successors, (6641), 1968 states have internal predecessors, (6641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:19,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6641 transitions. [2021-05-03 14:07:19,472 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6641 transitions. Word has length 22 [2021-05-03 14:07:19,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:19,472 INFO L480 AbstractCegarLoop]: Abstraction has 1969 states and 6641 transitions. [2021-05-03 14:07:19,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:19,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6641 transitions. [2021-05-03 14:07:19,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:19,475 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:19,475 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:19,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24499 [2021-05-03 14:07:19,676 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:19,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:19,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1440007587, now seen corresponding path program 82 times [2021-05-03 14:07:19,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:19,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580213395] [2021-05-03 14:07:19,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:19,770 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:19,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580213395] [2021-05-03 14:07:19,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813967399] [2021-05-03 14:07:19,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:19,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:19,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:19,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:19,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:19,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:19,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:19,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809598751] [2021-05-03 14:07:19,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:19,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:19,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:19,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:19,831 INFO L87 Difference]: Start difference. First operand 1969 states and 6641 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:20,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:20,010 INFO L93 Difference]: Finished difference Result 2016 states and 6708 transitions. [2021-05-03 14:07:20,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:20,010 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:20,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:20,013 INFO L225 Difference]: With dead ends: 2016 [2021-05-03 14:07:20,013 INFO L226 Difference]: Without dead ends: 2015 [2021-05-03 14:07:20,013 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:07:20,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2015 states. [2021-05-03 14:07:20,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2015 to 1969. [2021-05-03 14:07:20,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1969 states, 1968 states have (on average 3.3719512195121952) internal successors, (6636), 1968 states have internal predecessors, (6636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:20,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 6636 transitions. [2021-05-03 14:07:20,036 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 6636 transitions. Word has length 22 [2021-05-03 14:07:20,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:20,036 INFO L480 AbstractCegarLoop]: Abstraction has 1969 states and 6636 transitions. [2021-05-03 14:07:20,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:20,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 6636 transitions. [2021-05-03 14:07:20,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:20,039 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:20,039 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:20,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24500 [2021-05-03 14:07:20,240 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:20,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:20,240 INFO L82 PathProgramCache]: Analyzing trace with hash -517588854, now seen corresponding path program 83 times [2021-05-03 14:07:20,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:20,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100307516] [2021-05-03 14:07:20,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:20,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100307516] [2021-05-03 14:07:20,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760265475] [2021-05-03 14:07:20,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:07:20,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:07:20,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:20,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:20,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:20,397 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:20,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:20,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:20,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609228323] [2021-05-03 14:07:20,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:20,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:20,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:20,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:20,399 INFO L87 Difference]: Start difference. First operand 1969 states and 6636 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:20,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:20,478 INFO L93 Difference]: Finished difference Result 2320 states and 7225 transitions. [2021-05-03 14:07:20,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:07:20,478 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:20,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:20,482 INFO L225 Difference]: With dead ends: 2320 [2021-05-03 14:07:20,482 INFO L226 Difference]: Without dead ends: 2320 [2021-05-03 14:07:20,482 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:20,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2320 states. [2021-05-03 14:07:20,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2320 to 1919. [2021-05-03 14:07:20,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1919 states, 1918 states have (on average 3.3628779979144943) internal successors, (6450), 1918 states have internal predecessors, (6450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 6450 transitions. [2021-05-03 14:07:20,514 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 6450 transitions. Word has length 22 [2021-05-03 14:07:20,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:20,515 INFO L480 AbstractCegarLoop]: Abstraction has 1919 states and 6450 transitions. [2021-05-03 14:07:20,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 6450 transitions. [2021-05-03 14:07:20,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:20,518 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:20,518 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:20,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24501 [2021-05-03 14:07:20,739 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:20,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:20,740 INFO L82 PathProgramCache]: Analyzing trace with hash -408136825, now seen corresponding path program 84 times [2021-05-03 14:07:20,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:20,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868862726] [2021-05-03 14:07:20,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:20,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868862726] [2021-05-03 14:07:20,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666187793] [2021-05-03 14:07:20,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:20,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:07:20,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:20,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:20,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:20,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:20,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:20,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42319476] [2021-05-03 14:07:20,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:20,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:20,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:20,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:20,869 INFO L87 Difference]: Start difference. First operand 1919 states and 6450 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:21,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:21,011 INFO L93 Difference]: Finished difference Result 2210 states and 6903 transitions. [2021-05-03 14:07:21,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:07:21,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:21,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:21,014 INFO L225 Difference]: With dead ends: 2210 [2021-05-03 14:07:21,014 INFO L226 Difference]: Without dead ends: 2210 [2021-05-03 14:07:21,014 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:07:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2210 states. [2021-05-03 14:07:21,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2210 to 1916. [2021-05-03 14:07:21,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1916 states, 1915 states have (on average 3.3383812010443865) internal successors, (6393), 1915 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1916 states to 1916 states and 6393 transitions. [2021-05-03 14:07:21,036 INFO L78 Accepts]: Start accepts. Automaton has 1916 states and 6393 transitions. Word has length 22 [2021-05-03 14:07:21,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:21,036 INFO L480 AbstractCegarLoop]: Abstraction has 1916 states and 6393 transitions. [2021-05-03 14:07:21,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:21,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1916 states and 6393 transitions. [2021-05-03 14:07:21,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:21,038 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:21,038 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:21,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24502,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:21,239 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:21,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:21,239 INFO L82 PathProgramCache]: Analyzing trace with hash 675153308, now seen corresponding path program 85 times [2021-05-03 14:07:21,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:21,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128616880] [2021-05-03 14:07:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:21,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:21,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128616880] [2021-05-03 14:07:21,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99931388] [2021-05-03 14:07:21,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:21,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:21,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:21,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:21,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:21,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303218132] [2021-05-03 14:07:21,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:21,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:21,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:21,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:21,392 INFO L87 Difference]: Start difference. First operand 1916 states and 6393 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:21,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:21,600 INFO L93 Difference]: Finished difference Result 2207 states and 6832 transitions. [2021-05-03 14:07:21,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:21,601 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:21,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:21,604 INFO L225 Difference]: With dead ends: 2207 [2021-05-03 14:07:21,604 INFO L226 Difference]: Without dead ends: 2205 [2021-05-03 14:07:21,605 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:07:21,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2021-05-03 14:07:21,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1928. [2021-05-03 14:07:21,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1927 states have (on average 3.3388687078360144) internal successors, (6434), 1927 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:21,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 6434 transitions. [2021-05-03 14:07:21,636 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 6434 transitions. Word has length 22 [2021-05-03 14:07:21,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:21,636 INFO L480 AbstractCegarLoop]: Abstraction has 1928 states and 6434 transitions. [2021-05-03 14:07:21,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:21,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 6434 transitions. [2021-05-03 14:07:21,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:21,639 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:21,639 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:21,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24503 [2021-05-03 14:07:21,861 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:21,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:21,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1331955485, now seen corresponding path program 86 times [2021-05-03 14:07:21,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:21,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212882561] [2021-05-03 14:07:21,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:21,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:21,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212882561] [2021-05-03 14:07:21,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834462647] [2021-05-03 14:07:21,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:21,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:21,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:21,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:21,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:22,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:22,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:22,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479400939] [2021-05-03 14:07:22,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:22,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:22,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:22,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:22,001 INFO L87 Difference]: Start difference. First operand 1928 states and 6434 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:22,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:22,172 INFO L93 Difference]: Finished difference Result 2091 states and 6657 transitions. [2021-05-03 14:07:22,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:22,173 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:22,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:22,175 INFO L225 Difference]: With dead ends: 2091 [2021-05-03 14:07:22,175 INFO L226 Difference]: Without dead ends: 2089 [2021-05-03 14:07:22,176 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:07:22,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-05-03 14:07:22,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1892. [2021-05-03 14:07:22,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1891 states have (on average 3.3400317292437864) internal successors, (6316), 1891 states have internal predecessors, (6316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6316 transitions. [2021-05-03 14:07:22,196 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6316 transitions. Word has length 22 [2021-05-03 14:07:22,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:22,196 INFO L480 AbstractCegarLoop]: Abstraction has 1892 states and 6316 transitions. [2021-05-03 14:07:22,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:22,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6316 transitions. [2021-05-03 14:07:22,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:22,198 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:22,198 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:22,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24504 [2021-05-03 14:07:22,399 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:22,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:22,399 INFO L82 PathProgramCache]: Analyzing trace with hash -2040593078, now seen corresponding path program 87 times [2021-05-03 14:07:22,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:22,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779313009] [2021-05-03 14:07:22,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:22,467 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:22,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779313009] [2021-05-03 14:07:22,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887943939] [2021-05-03 14:07:22,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:22,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:07:22,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:22,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:22,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:22,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:22,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:22,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687572379] [2021-05-03 14:07:22,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:22,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:22,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:22,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:22,529 INFO L87 Difference]: Start difference. First operand 1892 states and 6316 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:22,593 INFO L93 Difference]: Finished difference Result 2273 states and 6960 transitions. [2021-05-03 14:07:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:07:22,593 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:22,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:22,596 INFO L225 Difference]: With dead ends: 2273 [2021-05-03 14:07:22,596 INFO L226 Difference]: Without dead ends: 2273 [2021-05-03 14:07:22,596 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:22,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2273 states. [2021-05-03 14:07:22,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2273 to 1896. [2021-05-03 14:07:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3393139841688653) internal successors, (6328), 1895 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:22,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6328 transitions. [2021-05-03 14:07:22,617 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6328 transitions. Word has length 22 [2021-05-03 14:07:22,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:22,617 INFO L480 AbstractCegarLoop]: Abstraction has 1896 states and 6328 transitions. [2021-05-03 14:07:22,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:22,617 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6328 transitions. [2021-05-03 14:07:22,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:22,619 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:22,620 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:22,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24505,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:22,820 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:22,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:22,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1252398503, now seen corresponding path program 88 times [2021-05-03 14:07:22,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:22,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830563357] [2021-05-03 14:07:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:22,899 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:22,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830563357] [2021-05-03 14:07:22,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805264531] [2021-05-03 14:07:22,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:22,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:22,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:22,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:22,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:22,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:22,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:22,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327264857] [2021-05-03 14:07:22,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:22,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:22,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:22,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:22,960 INFO L87 Difference]: Start difference. First operand 1896 states and 6328 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:23,139 INFO L93 Difference]: Finished difference Result 2019 states and 6507 transitions. [2021-05-03 14:07:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:07:23,139 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:23,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:23,142 INFO L225 Difference]: With dead ends: 2019 [2021-05-03 14:07:23,142 INFO L226 Difference]: Without dead ends: 2017 [2021-05-03 14:07:23,142 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 139.7ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:23,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2017 states. [2021-05-03 14:07:23,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2017 to 1896. [2021-05-03 14:07:23,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1896 states, 1895 states have (on average 3.3366754617414247) internal successors, (6323), 1895 states have internal predecessors, (6323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:23,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 6323 transitions. [2021-05-03 14:07:23,163 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 6323 transitions. Word has length 22 [2021-05-03 14:07:23,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:23,163 INFO L480 AbstractCegarLoop]: Abstraction has 1896 states and 6323 transitions. [2021-05-03 14:07:23,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:23,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 6323 transitions. [2021-05-03 14:07:23,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:23,165 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:23,165 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:23,365 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24506,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:23,366 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:23,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:23,366 INFO L82 PathProgramCache]: Analyzing trace with hash 525326884, now seen corresponding path program 89 times [2021-05-03 14:07:23,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:23,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879576600] [2021-05-03 14:07:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:23,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879576600] [2021-05-03 14:07:23,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116329487] [2021-05-03 14:07:23,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:23,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:07:23,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:23,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:23,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:23,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:23,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:23,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309923138] [2021-05-03 14:07:23,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:23,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:23,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:23,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:23,528 INFO L87 Difference]: Start difference. First operand 1896 states and 6323 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:23,625 INFO L93 Difference]: Finished difference Result 2414 states and 7311 transitions. [2021-05-03 14:07:23,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:07:23,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:23,628 INFO L225 Difference]: With dead ends: 2414 [2021-05-03 14:07:23,629 INFO L226 Difference]: Without dead ends: 2414 [2021-05-03 14:07:23,629 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:07:23,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2414 states. [2021-05-03 14:07:23,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2414 to 1844. [2021-05-03 14:07:23,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1844 states, 1843 states have (on average 3.3266413456321215) internal successors, (6131), 1843 states have internal predecessors, (6131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1844 states to 1844 states and 6131 transitions. [2021-05-03 14:07:23,658 INFO L78 Accepts]: Start accepts. Automaton has 1844 states and 6131 transitions. Word has length 22 [2021-05-03 14:07:23,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:23,658 INFO L480 AbstractCegarLoop]: Abstraction has 1844 states and 6131 transitions. [2021-05-03 14:07:23,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:23,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1844 states and 6131 transitions. [2021-05-03 14:07:23,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:23,661 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:23,661 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:23,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24507,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:23,881 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:23,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:23,881 INFO L82 PathProgramCache]: Analyzing trace with hash -376627513, now seen corresponding path program 90 times [2021-05-03 14:07:23,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:23,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074255009] [2021-05-03 14:07:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:23,969 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:23,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074255009] [2021-05-03 14:07:23,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354229462] [2021-05-03 14:07:23,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:07:23,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:07:24,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:24,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:24,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:24,044 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:24,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:24,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:24,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733141210] [2021-05-03 14:07:24,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:24,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:24,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:24,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:24,045 INFO L87 Difference]: Start difference. First operand 1844 states and 6131 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:24,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:24,193 INFO L93 Difference]: Finished difference Result 2122 states and 6550 transitions. [2021-05-03 14:07:24,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:07:24,194 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:24,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:24,197 INFO L225 Difference]: With dead ends: 2122 [2021-05-03 14:07:24,198 INFO L226 Difference]: Without dead ends: 2122 [2021-05-03 14:07:24,198 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:07:24,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-05-03 14:07:24,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1806. [2021-05-03 14:07:24,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1806 states, 1805 states have (on average 3.301939058171745) internal successors, (5960), 1805 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:24,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1806 states to 1806 states and 5960 transitions. [2021-05-03 14:07:24,230 INFO L78 Accepts]: Start accepts. Automaton has 1806 states and 5960 transitions. Word has length 22 [2021-05-03 14:07:24,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:24,231 INFO L480 AbstractCegarLoop]: Abstraction has 1806 states and 5960 transitions. [2021-05-03 14:07:24,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:24,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1806 states and 5960 transitions. [2021-05-03 14:07:24,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:24,234 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:24,234 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:24,456 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24508 [2021-05-03 14:07:24,457 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:24,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:24,457 INFO L82 PathProgramCache]: Analyzing trace with hash 706662620, now seen corresponding path program 91 times [2021-05-03 14:07:24,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:24,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491931767] [2021-05-03 14:07:24,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:24,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491931767] [2021-05-03 14:07:24,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283819081] [2021-05-03 14:07:24,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:24,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:24,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:24,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:24,594 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:24,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:24,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:24,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044120483] [2021-05-03 14:07:24,594 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:24,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:24,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:24,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:24,594 INFO L87 Difference]: Start difference. First operand 1806 states and 5960 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:24,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:24,809 INFO L93 Difference]: Finished difference Result 2095 states and 6396 transitions. [2021-05-03 14:07:24,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:24,809 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:24,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:24,811 INFO L225 Difference]: With dead ends: 2095 [2021-05-03 14:07:24,812 INFO L226 Difference]: Without dead ends: 2093 [2021-05-03 14:07:24,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 158.7ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:07:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-05-03 14:07:24,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 1820. [2021-05-03 14:07:24,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1820 states, 1819 states have (on average 3.302363936228697) internal successors, (6007), 1819 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:24,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1820 states to 1820 states and 6007 transitions. [2021-05-03 14:07:24,832 INFO L78 Accepts]: Start accepts. Automaton has 1820 states and 6007 transitions. Word has length 22 [2021-05-03 14:07:24,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:24,832 INFO L480 AbstractCegarLoop]: Abstraction has 1820 states and 6007 transitions. [2021-05-03 14:07:24,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:24,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1820 states and 6007 transitions. [2021-05-03 14:07:24,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:24,834 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:24,834 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:25,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24509,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:25,035 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:25,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:25,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1363464797, now seen corresponding path program 92 times [2021-05-03 14:07:25,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:25,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248208091] [2021-05-03 14:07:25,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:25,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248208091] [2021-05-03 14:07:25,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296049464] [2021-05-03 14:07:25,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:25,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:25,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:25,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:25,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:25,162 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:25,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:25,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:25,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691338972] [2021-05-03 14:07:25,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:25,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:25,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:25,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:25,163 INFO L87 Difference]: Start difference. First operand 1820 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:25,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:25,325 INFO L93 Difference]: Finished difference Result 1994 states and 6249 transitions. [2021-05-03 14:07:25,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:25,325 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:25,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:25,328 INFO L225 Difference]: With dead ends: 1994 [2021-05-03 14:07:25,328 INFO L226 Difference]: Without dead ends: 1992 [2021-05-03 14:07:25,328 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:07:25,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-05-03 14:07:25,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1813. [2021-05-03 14:07:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1813 states, 1812 states have (on average 3.3002207505518766) internal successors, (5980), 1812 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:25,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1813 states to 1813 states and 5980 transitions. [2021-05-03 14:07:25,349 INFO L78 Accepts]: Start accepts. Automaton has 1813 states and 5980 transitions. Word has length 22 [2021-05-03 14:07:25,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:25,349 INFO L480 AbstractCegarLoop]: Abstraction has 1813 states and 5980 transitions. [2021-05-03 14:07:25,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:25,349 INFO L276 IsEmpty]: Start isEmpty. Operand 1813 states and 5980 transitions. [2021-05-03 14:07:25,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:25,351 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:25,351 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:25,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24510 [2021-05-03 14:07:25,552 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:25,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:25,552 INFO L82 PathProgramCache]: Analyzing trace with hash -2009083766, now seen corresponding path program 93 times [2021-05-03 14:07:25,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:25,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725432537] [2021-05-03 14:07:25,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:25,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725432537] [2021-05-03 14:07:25,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347758391] [2021-05-03 14:07:25,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:25,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:07:25,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:25,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:25,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:25,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:25,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:25,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790957913] [2021-05-03 14:07:25,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:25,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:25,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:25,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:25,706 INFO L87 Difference]: Start difference. First operand 1813 states and 5980 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:25,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:25,782 INFO L93 Difference]: Finished difference Result 2201 states and 6640 transitions. [2021-05-03 14:07:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:07:25,782 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:25,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:25,786 INFO L225 Difference]: With dead ends: 2201 [2021-05-03 14:07:25,786 INFO L226 Difference]: Without dead ends: 2201 [2021-05-03 14:07:25,786 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 75.5ms TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:25,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2201 states. [2021-05-03 14:07:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2201 to 1816. [2021-05-03 14:07:25,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.299724517906336) internal successors, (5989), 1815 states have internal predecessors, (5989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5989 transitions. [2021-05-03 14:07:25,814 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5989 transitions. Word has length 22 [2021-05-03 14:07:25,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:25,814 INFO L480 AbstractCegarLoop]: Abstraction has 1816 states and 5989 transitions. [2021-05-03 14:07:25,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:25,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5989 transitions. [2021-05-03 14:07:25,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:25,817 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:25,817 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:26,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24511 [2021-05-03 14:07:26,038 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:26,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:26,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1220889191, now seen corresponding path program 94 times [2021-05-03 14:07:26,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:26,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175933121] [2021-05-03 14:07:26,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:26,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175933121] [2021-05-03 14:07:26,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933641669] [2021-05-03 14:07:26,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:26,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:26,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:26,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:26,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:26,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:26,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:26,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907139033] [2021-05-03 14:07:26,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:26,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:26,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:26,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:26,170 INFO L87 Difference]: Start difference. First operand 1816 states and 5989 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:26,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:26,355 INFO L93 Difference]: Finished difference Result 1990 states and 6234 transitions. [2021-05-03 14:07:26,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:07:26,356 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:26,358 INFO L225 Difference]: With dead ends: 1990 [2021-05-03 14:07:26,358 INFO L226 Difference]: Without dead ends: 1988 [2021-05-03 14:07:26,358 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:26,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2021-05-03 14:07:26,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1816. [2021-05-03 14:07:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1816 states, 1815 states have (on average 3.296969696969697) internal successors, (5984), 1815 states have internal predecessors, (5984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:26,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 5984 transitions. [2021-05-03 14:07:26,377 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 5984 transitions. Word has length 22 [2021-05-03 14:07:26,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:26,377 INFO L480 AbstractCegarLoop]: Abstraction has 1816 states and 5984 transitions. [2021-05-03 14:07:26,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:26,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 5984 transitions. [2021-05-03 14:07:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:26,379 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:26,380 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:26,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24512 [2021-05-03 14:07:26,580 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:26,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:26,580 INFO L82 PathProgramCache]: Analyzing trace with hash 556836196, now seen corresponding path program 95 times [2021-05-03 14:07:26,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:26,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182619761] [2021-05-03 14:07:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:26,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182619761] [2021-05-03 14:07:26,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478339490] [2021-05-03 14:07:26,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:26,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:07:26,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:26,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:26,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:26,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:26,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:26,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394792910] [2021-05-03 14:07:26,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:26,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:26,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:26,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:26,736 INFO L87 Difference]: Start difference. First operand 1816 states and 5984 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:26,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:26,833 INFO L93 Difference]: Finished difference Result 2351 states and 6997 transitions. [2021-05-03 14:07:26,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:07:26,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:26,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:26,836 INFO L225 Difference]: With dead ends: 2351 [2021-05-03 14:07:26,836 INFO L226 Difference]: Without dead ends: 2351 [2021-05-03 14:07:26,837 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=139, Invalid=203, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:07:26,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-05-03 14:07:26,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1778. [2021-05-03 14:07:26,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 3.2830613393359593) internal successors, (5834), 1777 states have internal predecessors, (5834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:26,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 5834 transitions. [2021-05-03 14:07:26,862 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 5834 transitions. Word has length 22 [2021-05-03 14:07:26,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:26,862 INFO L480 AbstractCegarLoop]: Abstraction has 1778 states and 5834 transitions. [2021-05-03 14:07:26,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:26,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 5834 transitions. [2021-05-03 14:07:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:26,865 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:26,865 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:27,065 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24513 [2021-05-03 14:07:27,066 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:27,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:27,066 INFO L82 PathProgramCache]: Analyzing trace with hash 268515805, now seen corresponding path program 96 times [2021-05-03 14:07:27,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:27,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876763625] [2021-05-03 14:07:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:27,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:27,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876763625] [2021-05-03 14:07:27,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107267842] [2021-05-03 14:07:27,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:27,156 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:07:27,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:27,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:27,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:27,204 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:27,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:27,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:27,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121136024] [2021-05-03 14:07:27,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:27,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:27,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:27,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:27,205 INFO L87 Difference]: Start difference. First operand 1778 states and 5834 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:27,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:27,374 INFO L93 Difference]: Finished difference Result 1995 states and 6375 transitions. [2021-05-03 14:07:27,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:27,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:27,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:27,377 INFO L225 Difference]: With dead ends: 1995 [2021-05-03 14:07:27,377 INFO L226 Difference]: Without dead ends: 1992 [2021-05-03 14:07:27,377 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:27,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1992 states. [2021-05-03 14:07:27,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1992 to 1782. [2021-05-03 14:07:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1782 states, 1781 states have (on average 3.2824256035934867) internal successors, (5846), 1781 states have internal predecessors, (5846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 5846 transitions. [2021-05-03 14:07:27,397 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 5846 transitions. Word has length 22 [2021-05-03 14:07:27,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:27,398 INFO L480 AbstractCegarLoop]: Abstraction has 1782 states and 5846 transitions. [2021-05-03 14:07:27,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 5846 transitions. [2021-05-03 14:07:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:27,399 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:27,399 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:27,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24514,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:27,600 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:27,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:27,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1504023606, now seen corresponding path program 97 times [2021-05-03 14:07:27,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:27,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040108286] [2021-05-03 14:07:27,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:27,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040108286] [2021-05-03 14:07:27,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317625870] [2021-05-03 14:07:27,676 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:27,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:27,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:27,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:27,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:27,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259219461] [2021-05-03 14:07:27,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:27,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:27,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:27,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:27,754 INFO L87 Difference]: Start difference. First operand 1782 states and 5846 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:27,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:27,881 INFO L93 Difference]: Finished difference Result 3202 states and 10128 transitions. [2021-05-03 14:07:27,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:07:27,881 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:27,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:27,886 INFO L225 Difference]: With dead ends: 3202 [2021-05-03 14:07:27,886 INFO L226 Difference]: Without dead ends: 3202 [2021-05-03 14:07:27,886 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:07:27,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3202 states. [2021-05-03 14:07:27,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3202 to 2517. [2021-05-03 14:07:27,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2517 states, 2516 states have (on average 3.433227344992051) internal successors, (8638), 2516 states have internal predecessors, (8638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:27,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2517 states to 2517 states and 8638 transitions. [2021-05-03 14:07:27,929 INFO L78 Accepts]: Start accepts. Automaton has 2517 states and 8638 transitions. Word has length 22 [2021-05-03 14:07:27,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:27,929 INFO L480 AbstractCegarLoop]: Abstraction has 2517 states and 8638 transitions. [2021-05-03 14:07:27,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:27,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2517 states and 8638 transitions. [2021-05-03 14:07:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:27,932 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:27,932 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:28,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24515,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:28,153 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:28,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:28,154 INFO L82 PathProgramCache]: Analyzing trace with hash 600161159, now seen corresponding path program 98 times [2021-05-03 14:07:28,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:28,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200933344] [2021-05-03 14:07:28,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:28,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200933344] [2021-05-03 14:07:28,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640447550] [2021-05-03 14:07:28,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:28,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:28,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:28,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:28,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:28,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:28,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:28,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104480163] [2021-05-03 14:07:28,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:28,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:28,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:28,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:28,291 INFO L87 Difference]: Start difference. First operand 2517 states and 8638 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:28,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:28,415 INFO L93 Difference]: Finished difference Result 2785 states and 8985 transitions. [2021-05-03 14:07:28,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:07:28,415 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:28,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:28,419 INFO L225 Difference]: With dead ends: 2785 [2021-05-03 14:07:28,419 INFO L226 Difference]: Without dead ends: 2785 [2021-05-03 14:07:28,420 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:07:28,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2021-05-03 14:07:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2437. [2021-05-03 14:07:28,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2437 states, 2436 states have (on average 3.3973727422003286) internal successors, (8276), 2436 states have internal predecessors, (8276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 8276 transitions. [2021-05-03 14:07:28,452 INFO L78 Accepts]: Start accepts. Automaton has 2437 states and 8276 transitions. Word has length 22 [2021-05-03 14:07:28,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:28,452 INFO L480 AbstractCegarLoop]: Abstraction has 2437 states and 8276 transitions. [2021-05-03 14:07:28,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2437 states and 8276 transitions. [2021-05-03 14:07:28,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:28,454 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:28,454 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:28,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24516 [2021-05-03 14:07:28,655 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:28,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:28,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1683451292, now seen corresponding path program 99 times [2021-05-03 14:07:28,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:28,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420537384] [2021-05-03 14:07:28,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:28,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420537384] [2021-05-03 14:07:28,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396385646] [2021-05-03 14:07:28,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:28,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:07:28,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:28,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:28,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:28,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:28,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:28,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044339578] [2021-05-03 14:07:28,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:28,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:28,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:28,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:28,808 INFO L87 Difference]: Start difference. First operand 2437 states and 8276 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:28,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:28,963 INFO L93 Difference]: Finished difference Result 2747 states and 8798 transitions. [2021-05-03 14:07:28,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:28,963 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:28,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:28,966 INFO L225 Difference]: With dead ends: 2747 [2021-05-03 14:07:28,966 INFO L226 Difference]: Without dead ends: 2745 [2021-05-03 14:07:28,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:07:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2745 states. [2021-05-03 14:07:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2745 to 2476. [2021-05-03 14:07:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2476 states, 2475 states have (on average 3.3975757575757575) internal successors, (8409), 2475 states have internal predecessors, (8409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2476 states to 2476 states and 8409 transitions. [2021-05-03 14:07:28,994 INFO L78 Accepts]: Start accepts. Automaton has 2476 states and 8409 transitions. Word has length 22 [2021-05-03 14:07:28,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:28,994 INFO L480 AbstractCegarLoop]: Abstraction has 2476 states and 8409 transitions. [2021-05-03 14:07:28,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:28,994 INFO L276 IsEmpty]: Start isEmpty. Operand 2476 states and 8409 transitions. [2021-05-03 14:07:28,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:28,996 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:28,996 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:29,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24517,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:29,197 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:29,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:29,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1954713827, now seen corresponding path program 100 times [2021-05-03 14:07:29,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:29,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739645340] [2021-05-03 14:07:29,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:29,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739645340] [2021-05-03 14:07:29,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210645301] [2021-05-03 14:07:29,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:29,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:29,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:29,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:29,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:29,318 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:29,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:29,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:29,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988667315] [2021-05-03 14:07:29,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:29,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:29,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:29,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:29,319 INFO L87 Difference]: Start difference. First operand 2476 states and 8409 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:29,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:29,491 INFO L93 Difference]: Finished difference Result 2659 states and 8666 transitions. [2021-05-03 14:07:29,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:29,492 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:29,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:29,495 INFO L225 Difference]: With dead ends: 2659 [2021-05-03 14:07:29,495 INFO L226 Difference]: Without dead ends: 2657 [2021-05-03 14:07:29,496 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:07:29,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-05-03 14:07:29,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2462. [2021-05-03 14:07:29,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2462 states, 2461 states have (on average 3.3933360422592442) internal successors, (8351), 2461 states have internal predecessors, (8351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:29,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2462 states to 2462 states and 8351 transitions. [2021-05-03 14:07:29,527 INFO L78 Accepts]: Start accepts. Automaton has 2462 states and 8351 transitions. Word has length 22 [2021-05-03 14:07:29,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:29,527 INFO L480 AbstractCegarLoop]: Abstraction has 2462 states and 8351 transitions. [2021-05-03 14:07:29,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:29,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2462 states and 8351 transitions. [2021-05-03 14:07:29,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:29,530 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:29,530 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:29,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24518 [2021-05-03 14:07:29,731 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:29,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:29,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1032295094, now seen corresponding path program 101 times [2021-05-03 14:07:29,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:29,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360200354] [2021-05-03 14:07:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:29,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360200354] [2021-05-03 14:07:29,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825594994] [2021-05-03 14:07:29,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:29,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:07:29,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:29,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:29,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:29,870 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:29,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:29,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:29,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273592777] [2021-05-03 14:07:29,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:29,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:29,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:29,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:29,873 INFO L87 Difference]: Start difference. First operand 2462 states and 8351 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:29,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:29,939 INFO L93 Difference]: Finished difference Result 2808 states and 8897 transitions. [2021-05-03 14:07:29,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:07:29,939 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:29,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:29,942 INFO L225 Difference]: With dead ends: 2808 [2021-05-03 14:07:29,942 INFO L226 Difference]: Without dead ends: 2808 [2021-05-03 14:07:29,942 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=104, Invalid=136, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2808 states. [2021-05-03 14:07:29,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2808 to 2464. [2021-05-03 14:07:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.39301664636622) internal successors, (8357), 2463 states have internal predecessors, (8357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:29,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8357 transitions. [2021-05-03 14:07:29,971 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8357 transitions. Word has length 22 [2021-05-03 14:07:29,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:29,971 INFO L480 AbstractCegarLoop]: Abstraction has 2464 states and 8357 transitions. [2021-05-03 14:07:29,971 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:29,971 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8357 transitions. [2021-05-03 14:07:29,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:29,973 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:29,973 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:30,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24519,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:30,174 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:30,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:30,174 INFO L82 PathProgramCache]: Analyzing trace with hash -244100519, now seen corresponding path program 102 times [2021-05-03 14:07:30,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:30,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921877461] [2021-05-03 14:07:30,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:30,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921877461] [2021-05-03 14:07:30,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419138475] [2021-05-03 14:07:30,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:30,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:07:30,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:30,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:30,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:30,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:30,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:30,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294431166] [2021-05-03 14:07:30,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:30,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:30,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:30,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:30,307 INFO L87 Difference]: Start difference. First operand 2464 states and 8357 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:30,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:30,490 INFO L93 Difference]: Finished difference Result 2648 states and 8618 transitions. [2021-05-03 14:07:30,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:07:30,490 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:30,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:30,493 INFO L225 Difference]: With dead ends: 2648 [2021-05-03 14:07:30,493 INFO L226 Difference]: Without dead ends: 2646 [2021-05-03 14:07:30,493 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 131.8ms TimeCoverageRelationStatistics Valid=269, Invalid=487, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:30,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-05-03 14:07:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2464. [2021-05-03 14:07:30,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2464 states, 2463 states have (on average 3.3909866017052375) internal successors, (8352), 2463 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2464 states to 2464 states and 8352 transitions. [2021-05-03 14:07:30,521 INFO L78 Accepts]: Start accepts. Automaton has 2464 states and 8352 transitions. Word has length 22 [2021-05-03 14:07:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:30,521 INFO L480 AbstractCegarLoop]: Abstraction has 2464 states and 8352 transitions. [2021-05-03 14:07:30,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2464 states and 8352 transitions. [2021-05-03 14:07:30,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:30,523 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:30,524 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:30,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24520 [2021-05-03 14:07:30,724 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:30,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:30,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1533624868, now seen corresponding path program 103 times [2021-05-03 14:07:30,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:30,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448819295] [2021-05-03 14:07:30,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:30,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:30,788 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:30,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448819295] [2021-05-03 14:07:30,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192250090] [2021-05-03 14:07:30,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:30,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:30,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:30,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:30,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:30,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220486945] [2021-05-03 14:07:30,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:30,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:30,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:30,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:30,852 INFO L87 Difference]: Start difference. First operand 2464 states and 8352 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:30,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:30,937 INFO L93 Difference]: Finished difference Result 2940 states and 9196 transitions. [2021-05-03 14:07:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:07:30,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:30,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:30,941 INFO L225 Difference]: With dead ends: 2940 [2021-05-03 14:07:30,941 INFO L226 Difference]: Without dead ends: 2940 [2021-05-03 14:07:30,941 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:07:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2940 states. [2021-05-03 14:07:30,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2940 to 2381. [2021-05-03 14:07:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2381 states, 2380 states have (on average 3.376890756302521) internal successors, (8037), 2380 states have internal predecessors, (8037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2381 states to 2381 states and 8037 transitions. [2021-05-03 14:07:30,968 INFO L78 Accepts]: Start accepts. Automaton has 2381 states and 8037 transitions. Word has length 22 [2021-05-03 14:07:30,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:30,968 INFO L480 AbstractCegarLoop]: Abstraction has 2381 states and 8037 transitions. [2021-05-03 14:07:30,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:30,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2381 states and 8037 transitions. [2021-05-03 14:07:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:30,970 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:30,970 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:31,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24521 [2021-05-03 14:07:31,183 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:31,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:31,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1245304477, now seen corresponding path program 104 times [2021-05-03 14:07:31,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:31,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828532743] [2021-05-03 14:07:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:31,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828532743] [2021-05-03 14:07:31,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020294065] [2021-05-03 14:07:31,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:31,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:31,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:31,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:31,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:31,312 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:31,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:31,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:31,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600033967] [2021-05-03 14:07:31,312 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:31,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:31,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:31,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:31,313 INFO L87 Difference]: Start difference. First operand 2381 states and 8037 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:31,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:31,472 INFO L93 Difference]: Finished difference Result 2660 states and 8730 transitions. [2021-05-03 14:07:31,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:31,472 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:31,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:31,476 INFO L225 Difference]: With dead ends: 2660 [2021-05-03 14:07:31,476 INFO L226 Difference]: Without dead ends: 2657 [2021-05-03 14:07:31,476 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2657 states. [2021-05-03 14:07:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2657 to 2387. [2021-05-03 14:07:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2387 states, 2386 states have (on average 3.377200335289187) internal successors, (8058), 2386 states have internal predecessors, (8058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2387 states to 2387 states and 8058 transitions. [2021-05-03 14:07:31,501 INFO L78 Accepts]: Start accepts. Automaton has 2387 states and 8058 transitions. Word has length 22 [2021-05-03 14:07:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:31,501 INFO L480 AbstractCegarLoop]: Abstraction has 2387 states and 8058 transitions. [2021-05-03 14:07:31,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 2387 states and 8058 transitions. [2021-05-03 14:07:31,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:31,504 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:31,504 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:31,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24522 [2021-05-03 14:07:31,704 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:31,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:31,704 INFO L82 PathProgramCache]: Analyzing trace with hash -527234934, now seen corresponding path program 105 times [2021-05-03 14:07:31,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:31,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406762868] [2021-05-03 14:07:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:31,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:31,771 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:31,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406762868] [2021-05-03 14:07:31,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076999726] [2021-05-03 14:07:31,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:31,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:07:31,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:31,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:31,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:31,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:31,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:31,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17297210] [2021-05-03 14:07:31,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:31,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:31,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:31,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:31,843 INFO L87 Difference]: Start difference. First operand 2387 states and 8058 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:31,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:31,942 INFO L93 Difference]: Finished difference Result 4123 states and 13618 transitions. [2021-05-03 14:07:31,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:07:31,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:31,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:31,948 INFO L225 Difference]: With dead ends: 4123 [2021-05-03 14:07:31,948 INFO L226 Difference]: Without dead ends: 4123 [2021-05-03 14:07:31,948 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:07:31,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-05-03 14:07:32,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3555. [2021-05-03 14:07:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3555 states, 3554 states have (on average 3.51435002813731) internal successors, (12490), 3554 states have internal predecessors, (12490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:32,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3555 states to 3555 states and 12490 transitions. [2021-05-03 14:07:32,012 INFO L78 Accepts]: Start accepts. Automaton has 3555 states and 12490 transitions. Word has length 22 [2021-05-03 14:07:32,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:32,012 INFO L480 AbstractCegarLoop]: Abstraction has 3555 states and 12490 transitions. [2021-05-03 14:07:32,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:32,012 INFO L276 IsEmpty]: Start isEmpty. Operand 3555 states and 12490 transitions. [2021-05-03 14:07:32,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:32,015 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:32,015 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:32,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24523,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:32,225 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:32,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:32,225 INFO L82 PathProgramCache]: Analyzing trace with hash 172219097, now seen corresponding path program 106 times [2021-05-03 14:07:32,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:32,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123653058] [2021-05-03 14:07:32,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:32,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123653058] [2021-05-03 14:07:32,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724255726] [2021-05-03 14:07:32,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:32,315 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:32,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:32,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:32,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:32,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:32,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:32,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691616928] [2021-05-03 14:07:32,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:32,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:32,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:32,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:32,355 INFO L87 Difference]: Start difference. First operand 3555 states and 12490 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:32,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:32,520 INFO L93 Difference]: Finished difference Result 3810 states and 13136 transitions. [2021-05-03 14:07:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:07:32,520 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:32,525 INFO L225 Difference]: With dead ends: 3810 [2021-05-03 14:07:32,525 INFO L226 Difference]: Without dead ends: 3806 [2021-05-03 14:07:32,525 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 141.1ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-05-03 14:07:32,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3556. [2021-05-03 14:07:32,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3556 states, 3555 states have (on average 3.5130801687763715) internal successors, (12489), 3555 states have internal predecessors, (12489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3556 states to 3556 states and 12489 transitions. [2021-05-03 14:07:32,569 INFO L78 Accepts]: Start accepts. Automaton has 3556 states and 12489 transitions. Word has length 22 [2021-05-03 14:07:32,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:32,569 INFO L480 AbstractCegarLoop]: Abstraction has 3556 states and 12489 transitions. [2021-05-03 14:07:32,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 3556 states and 12489 transitions. [2021-05-03 14:07:32,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:32,572 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:32,572 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:32,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24524 [2021-05-03 14:07:32,773 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:32,773 INFO L82 PathProgramCache]: Analyzing trace with hash 10620644, now seen corresponding path program 107 times [2021-05-03 14:07:32,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:32,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410870666] [2021-05-03 14:07:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:32,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410870666] [2021-05-03 14:07:32,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798673288] [2021-05-03 14:07:32,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:32,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:07:32,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:32,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:32,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:32,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:32,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:32,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014052403] [2021-05-03 14:07:32,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:32,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:32,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:32,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:32,935 INFO L87 Difference]: Start difference. First operand 3556 states and 12489 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:33,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:33,082 INFO L93 Difference]: Finished difference Result 5567 states and 18927 transitions. [2021-05-03 14:07:33,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:07:33,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:33,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:33,090 INFO L225 Difference]: With dead ends: 5567 [2021-05-03 14:07:33,090 INFO L226 Difference]: Without dead ends: 5567 [2021-05-03 14:07:33,090 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:07:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5567 states. [2021-05-03 14:07:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5567 to 4818. [2021-05-03 14:07:33,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4818 states, 4817 states have (on average 3.5931077434087606) internal successors, (17308), 4817 states have internal predecessors, (17308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 17308 transitions. [2021-05-03 14:07:33,184 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 17308 transitions. Word has length 22 [2021-05-03 14:07:33,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:33,185 INFO L480 AbstractCegarLoop]: Abstraction has 4818 states and 17308 transitions. [2021-05-03 14:07:33,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:33,185 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 17308 transitions. [2021-05-03 14:07:33,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:33,188 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:33,188 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:33,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24525,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:33,389 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:33,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:33,389 INFO L82 PathProgramCache]: Analyzing trace with hash 815838919, now seen corresponding path program 108 times [2021-05-03 14:07:33,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:33,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994406145] [2021-05-03 14:07:33,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:33,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994406145] [2021-05-03 14:07:33,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86695252] [2021-05-03 14:07:33,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:33,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-03 14:07:33,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:33,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:33,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:33,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:33,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:33,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118562742] [2021-05-03 14:07:33,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:33,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:33,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:33,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:33,542 INFO L87 Difference]: Start difference. First operand 4818 states and 17308 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:33,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:33,643 INFO L93 Difference]: Finished difference Result 5072 states and 17481 transitions. [2021-05-03 14:07:33,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:07:33,643 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:33,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:33,650 INFO L225 Difference]: With dead ends: 5072 [2021-05-03 14:07:33,650 INFO L226 Difference]: Without dead ends: 5072 [2021-05-03 14:07:33,650 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:07:33,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5072 states. [2021-05-03 14:07:33,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5072 to 4661. [2021-05-03 14:07:33,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 3.5489270386266094) internal successors, (16538), 4660 states have internal predecessors, (16538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:33,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 16538 transitions. [2021-05-03 14:07:33,711 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 16538 transitions. Word has length 22 [2021-05-03 14:07:33,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:33,712 INFO L480 AbstractCegarLoop]: Abstraction has 4661 states and 16538 transitions. [2021-05-03 14:07:33,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:33,712 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 16538 transitions. [2021-05-03 14:07:33,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:33,715 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:33,715 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:33,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24526 [2021-05-03 14:07:33,924 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:33,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:33,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1899129052, now seen corresponding path program 109 times [2021-05-03 14:07:33,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:33,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841054415] [2021-05-03 14:07:33,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:33,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841054415] [2021-05-03 14:07:33,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941080088] [2021-05-03 14:07:33,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:34,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:34,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:34,039 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:34,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:34,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:34,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858116281] [2021-05-03 14:07:34,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:34,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:34,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:34,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:34,040 INFO L87 Difference]: Start difference. First operand 4661 states and 16538 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:34,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:34,209 INFO L93 Difference]: Finished difference Result 5066 states and 17441 transitions. [2021-05-03 14:07:34,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:34,210 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:34,217 INFO L225 Difference]: With dead ends: 5066 [2021-05-03 14:07:34,217 INFO L226 Difference]: Without dead ends: 5064 [2021-05-03 14:07:34,218 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:07:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2021-05-03 14:07:34,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 4803. [2021-05-03 14:07:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4803 states, 4802 states have (on average 3.546022490628905) internal successors, (17028), 4802 states have internal predecessors, (17028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:34,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4803 states to 4803 states and 17028 transitions. [2021-05-03 14:07:34,292 INFO L78 Accepts]: Start accepts. Automaton has 4803 states and 17028 transitions. Word has length 22 [2021-05-03 14:07:34,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:34,293 INFO L480 AbstractCegarLoop]: Abstraction has 4803 states and 17028 transitions. [2021-05-03 14:07:34,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:34,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4803 states and 17028 transitions. [2021-05-03 14:07:34,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:34,296 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:34,296 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:34,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24527,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:34,499 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:34,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:34,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1739036067, now seen corresponding path program 110 times [2021-05-03 14:07:34,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:34,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352655480] [2021-05-03 14:07:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:34,583 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:34,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352655480] [2021-05-03 14:07:34,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444219335] [2021-05-03 14:07:34,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:34,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:34,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:34,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:34,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:34,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:34,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:34,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594304206] [2021-05-03 14:07:34,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:34,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:34,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:34,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:34,637 INFO L87 Difference]: Start difference. First operand 4803 states and 17028 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:34,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:34,809 INFO L93 Difference]: Finished difference Result 5001 states and 17312 transitions. [2021-05-03 14:07:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:34,809 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:34,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:34,816 INFO L225 Difference]: With dead ends: 5001 [2021-05-03 14:07:34,816 INFO L226 Difference]: Without dead ends: 4999 [2021-05-03 14:07:34,817 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:07:34,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4999 states. [2021-05-03 14:07:34,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4999 to 4791. [2021-05-03 14:07:34,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4791 states, 4790 states have (on average 3.5361169102296452) internal successors, (16938), 4790 states have internal predecessors, (16938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:34,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4791 states to 4791 states and 16938 transitions. [2021-05-03 14:07:34,886 INFO L78 Accepts]: Start accepts. Automaton has 4791 states and 16938 transitions. Word has length 22 [2021-05-03 14:07:34,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:34,886 INFO L480 AbstractCegarLoop]: Abstraction has 4791 states and 16938 transitions. [2021-05-03 14:07:34,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 4791 states and 16938 transitions. [2021-05-03 14:07:34,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:34,890 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:34,890 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:35,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24528 [2021-05-03 14:07:35,091 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:35,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:35,091 INFO L82 PathProgramCache]: Analyzing trace with hash -816617334, now seen corresponding path program 111 times [2021-05-03 14:07:35,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:35,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804915940] [2021-05-03 14:07:35,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:35,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804915940] [2021-05-03 14:07:35,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559943428] [2021-05-03 14:07:35,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:35,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:07:35,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:35,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:35,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:35,224 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:35,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:35,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:35,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904440844] [2021-05-03 14:07:35,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:35,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:35,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:35,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:35,225 INFO L87 Difference]: Start difference. First operand 4791 states and 16938 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:35,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:35,328 INFO L93 Difference]: Finished difference Result 5161 states and 17507 transitions. [2021-05-03 14:07:35,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:07:35,329 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:35,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:35,339 INFO L225 Difference]: With dead ends: 5161 [2021-05-03 14:07:35,339 INFO L226 Difference]: Without dead ends: 5161 [2021-05-03 14:07:35,340 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=103, Invalid=137, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:35,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5161 states. [2021-05-03 14:07:35,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5161 to 4811. [2021-05-03 14:07:35,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4810 states have (on average 3.51995841995842) internal successors, (16931), 4810 states have internal predecessors, (16931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 16931 transitions. [2021-05-03 14:07:35,439 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 16931 transitions. Word has length 22 [2021-05-03 14:07:35,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:35,439 INFO L480 AbstractCegarLoop]: Abstraction has 4811 states and 16931 transitions. [2021-05-03 14:07:35,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:35,439 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 16931 transitions. [2021-05-03 14:07:35,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:35,443 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:35,443 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:35,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24529,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:35,644 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:35,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:35,644 INFO L82 PathProgramCache]: Analyzing trace with hash -28422759, now seen corresponding path program 112 times [2021-05-03 14:07:35,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:35,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135869571] [2021-05-03 14:07:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:35,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:35,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135869571] [2021-05-03 14:07:35,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793017326] [2021-05-03 14:07:35,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:35,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:35,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:35,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:35,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:35,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:35,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:35,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200789559] [2021-05-03 14:07:35,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:35,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:35,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:35,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:35,795 INFO L87 Difference]: Start difference. First operand 4811 states and 16931 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:35,974 INFO L93 Difference]: Finished difference Result 5011 states and 17220 transitions. [2021-05-03 14:07:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:07:35,974 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:35,981 INFO L225 Difference]: With dead ends: 5011 [2021-05-03 14:07:35,982 INFO L226 Difference]: Without dead ends: 5009 [2021-05-03 14:07:35,982 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 143.7ms TimeCoverageRelationStatistics Valid=270, Invalid=486, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:35,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5009 states. [2021-05-03 14:07:36,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5009 to 4811. [2021-05-03 14:07:36,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4811 states, 4810 states have (on average 3.5185031185031184) internal successors, (16924), 4810 states have internal predecessors, (16924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:36,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4811 states to 4811 states and 16924 transitions. [2021-05-03 14:07:36,056 INFO L78 Accepts]: Start accepts. Automaton has 4811 states and 16924 transitions. Word has length 22 [2021-05-03 14:07:36,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:36,056 INFO L480 AbstractCegarLoop]: Abstraction has 4811 states and 16924 transitions. [2021-05-03 14:07:36,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:36,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4811 states and 16924 transitions. [2021-05-03 14:07:36,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:36,061 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:36,061 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:36,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24530,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:36,279 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:36,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:36,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1749302628, now seen corresponding path program 113 times [2021-05-03 14:07:36,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:36,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657033708] [2021-05-03 14:07:36,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:36,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:36,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657033708] [2021-05-03 14:07:36,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911119197] [2021-05-03 14:07:36,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:36,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:07:36,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:36,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:36,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:36,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:36,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:36,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764380517] [2021-05-03 14:07:36,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:36,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:36,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:36,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:36,423 INFO L87 Difference]: Start difference. First operand 4811 states and 16924 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:36,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:36,521 INFO L93 Difference]: Finished difference Result 5260 states and 17706 transitions. [2021-05-03 14:07:36,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:07:36,521 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:36,528 INFO L225 Difference]: With dead ends: 5260 [2021-05-03 14:07:36,528 INFO L226 Difference]: Without dead ends: 5260 [2021-05-03 14:07:36,528 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=137, Invalid=205, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:07:36,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5260 states. [2021-05-03 14:07:36,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5260 to 4668. [2021-05-03 14:07:36,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 4667 states have (on average 3.503106920934219) internal successors, (16349), 4667 states have internal predecessors, (16349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:36,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 16349 transitions. [2021-05-03 14:07:36,596 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 16349 transitions. Word has length 22 [2021-05-03 14:07:36,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:36,596 INFO L480 AbstractCegarLoop]: Abstraction has 4668 states and 16349 transitions. [2021-05-03 14:07:36,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 16349 transitions. [2021-05-03 14:07:36,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:36,600 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:36,600 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:36,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24531,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:36,800 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:36,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:36,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1460982237, now seen corresponding path program 114 times [2021-05-03 14:07:36,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:36,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300307921] [2021-05-03 14:07:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:36,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300307921] [2021-05-03 14:07:36,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757585946] [2021-05-03 14:07:36,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:07:36,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-03 14:07:36,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:36,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:36,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:36,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:36,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:36,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395482035] [2021-05-03 14:07:36,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:36,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:36,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:36,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:36,945 INFO L87 Difference]: Start difference. First operand 4668 states and 16349 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:37,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:37,152 INFO L93 Difference]: Finished difference Result 4999 states and 17165 transitions. [2021-05-03 14:07:37,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:37,152 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:37,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:37,162 INFO L225 Difference]: With dead ends: 4999 [2021-05-03 14:07:37,163 INFO L226 Difference]: Without dead ends: 4996 [2021-05-03 14:07:37,163 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:37,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2021-05-03 14:07:37,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 4674. [2021-05-03 14:07:37,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 3.503316927027605) internal successors, (16371), 4673 states have internal predecessors, (16371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 16371 transitions. [2021-05-03 14:07:37,259 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 16371 transitions. Word has length 22 [2021-05-03 14:07:37,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:37,260 INFO L480 AbstractCegarLoop]: Abstraction has 4674 states and 16371 transitions. [2021-05-03 14:07:37,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:37,260 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 16371 transitions. [2021-05-03 14:07:37,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:37,264 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:37,264 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:37,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24532 [2021-05-03 14:07:37,485 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:37,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:37,485 INFO L82 PathProgramCache]: Analyzing trace with hash -311557174, now seen corresponding path program 115 times [2021-05-03 14:07:37,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:37,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288422822] [2021-05-03 14:07:37,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:37,545 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:37,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288422822] [2021-05-03 14:07:37,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322911814] [2021-05-03 14:07:37,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:37,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:37,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:37,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:37,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:37,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:37,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393056725] [2021-05-03 14:07:37,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:37,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:37,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:37,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:37,609 INFO L87 Difference]: Start difference. First operand 4674 states and 16371 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:37,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:37,720 INFO L93 Difference]: Finished difference Result 8484 states and 29708 transitions. [2021-05-03 14:07:37,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:07:37,721 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:37,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:37,735 INFO L225 Difference]: With dead ends: 8484 [2021-05-03 14:07:37,735 INFO L226 Difference]: Without dead ends: 8484 [2021-05-03 14:07:37,735 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 82.5ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:07:37,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8484 states. [2021-05-03 14:07:37,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8484 to 7934. [2021-05-03 14:07:37,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7933 states have (on average 3.6155300642884156) internal successors, (28682), 7933 states have internal predecessors, (28682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:37,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 28682 transitions. [2021-05-03 14:07:37,868 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 28682 transitions. Word has length 22 [2021-05-03 14:07:37,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:37,868 INFO L480 AbstractCegarLoop]: Abstraction has 7934 states and 28682 transitions. [2021-05-03 14:07:37,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:37,869 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 28682 transitions. [2021-05-03 14:07:37,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:37,873 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:37,873 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:38,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24533 [2021-05-03 14:07:38,095 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:38,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:38,095 INFO L82 PathProgramCache]: Analyzing trace with hash 387896857, now seen corresponding path program 116 times [2021-05-03 14:07:38,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:38,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834938931] [2021-05-03 14:07:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:38,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834938931] [2021-05-03 14:07:38,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102506350] [2021-05-03 14:07:38,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:38,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:38,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:38,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:38,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:38,227 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:38,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:38,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:38,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863285685] [2021-05-03 14:07:38,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:38,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:38,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:38,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:38,228 INFO L87 Difference]: Start difference. First operand 7934 states and 28682 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:38,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:38,426 INFO L93 Difference]: Finished difference Result 8250 states and 29464 transitions. [2021-05-03 14:07:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:07:38,427 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:38,440 INFO L225 Difference]: With dead ends: 8250 [2021-05-03 14:07:38,440 INFO L226 Difference]: Without dead ends: 8246 [2021-05-03 14:07:38,440 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 139.1ms TimeCoverageRelationStatistics Valid=254, Invalid=502, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8246 states. [2021-05-03 14:07:38,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8246 to 7934. [2021-05-03 14:07:38,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7934 states, 7933 states have (on average 3.615277952855162) internal successors, (28680), 7933 states have internal predecessors, (28680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:38,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7934 states to 7934 states and 28680 transitions. [2021-05-03 14:07:38,564 INFO L78 Accepts]: Start accepts. Automaton has 7934 states and 28680 transitions. Word has length 22 [2021-05-03 14:07:38,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:38,564 INFO L480 AbstractCegarLoop]: Abstraction has 7934 states and 28680 transitions. [2021-05-03 14:07:38,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:38,564 INFO L276 IsEmpty]: Start isEmpty. Operand 7934 states and 28680 transitions. [2021-05-03 14:07:38,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:38,568 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:38,568 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:38,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24534 [2021-05-03 14:07:38,769 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:38,769 INFO L82 PathProgramCache]: Analyzing trace with hash 226298404, now seen corresponding path program 117 times [2021-05-03 14:07:38,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:38,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411956823] [2021-05-03 14:07:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:38,859 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:38,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411956823] [2021-05-03 14:07:38,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589572218] [2021-05-03 14:07:38,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:38,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:07:38,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:38,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:38,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:38,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:38,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:38,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388068160] [2021-05-03 14:07:38,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:38,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:38,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:38,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:38,943 INFO L87 Difference]: Start difference. First operand 7934 states and 28680 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:39,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:39,090 INFO L93 Difference]: Finished difference Result 11106 states and 39649 transitions. [2021-05-03 14:07:39,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:07:39,091 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:39,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:39,109 INFO L225 Difference]: With dead ends: 11106 [2021-05-03 14:07:39,109 INFO L226 Difference]: Without dead ends: 11106 [2021-05-03 14:07:39,109 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:07:39,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11106 states. [2021-05-03 14:07:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11106 to 10570. [2021-05-03 14:07:39,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10570 states, 10569 states have (on average 3.65701580092724) internal successors, (38651), 10569 states have internal predecessors, (38651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10570 states to 10570 states and 38651 transitions. [2021-05-03 14:07:39,314 INFO L78 Accepts]: Start accepts. Automaton has 10570 states and 38651 transitions. Word has length 22 [2021-05-03 14:07:39,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:39,314 INFO L480 AbstractCegarLoop]: Abstraction has 10570 states and 38651 transitions. [2021-05-03 14:07:39,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:39,314 INFO L276 IsEmpty]: Start isEmpty. Operand 10570 states and 38651 transitions. [2021-05-03 14:07:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:39,319 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:39,319 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:39,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24535 [2021-05-03 14:07:39,519 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:39,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1481988445, now seen corresponding path program 118 times [2021-05-03 14:07:39,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:39,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42575412] [2021-05-03 14:07:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:39,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42575412] [2021-05-03 14:07:39,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912734345] [2021-05-03 14:07:39,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:39,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:39,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:39,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:39,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:39,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:39,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:39,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84589917] [2021-05-03 14:07:39,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:39,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:39,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:39,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:39,656 INFO L87 Difference]: Start difference. First operand 10570 states and 38651 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:39,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:39,855 INFO L93 Difference]: Finished difference Result 10860 states and 39397 transitions. [2021-05-03 14:07:39,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:07:39,856 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:39,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:39,877 INFO L225 Difference]: With dead ends: 10860 [2021-05-03 14:07:39,877 INFO L226 Difference]: Without dead ends: 10855 [2021-05-03 14:07:39,877 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:39,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10855 states. [2021-05-03 14:07:40,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10855 to 10571. [2021-05-03 14:07:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10571 states, 10570 states have (on average 3.656669820245979) internal successors, (38651), 10570 states have internal predecessors, (38651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10571 states to 10571 states and 38651 transitions. [2021-05-03 14:07:40,053 INFO L78 Accepts]: Start accepts. Automaton has 10571 states and 38651 transitions. Word has length 22 [2021-05-03 14:07:40,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:40,053 INFO L480 AbstractCegarLoop]: Abstraction has 10571 states and 38651 transitions. [2021-05-03 14:07:40,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:40,053 INFO L276 IsEmpty]: Start isEmpty. Operand 10571 states and 38651 transitions. [2021-05-03 14:07:40,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:40,057 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:40,058 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:40,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24536,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:40,258 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:40,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:40,258 INFO L82 PathProgramCache]: Analyzing trace with hash -280047862, now seen corresponding path program 119 times [2021-05-03 14:07:40,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:40,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499147158] [2021-05-03 14:07:40,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:40,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499147158] [2021-05-03 14:07:40,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222039382] [2021-05-03 14:07:40,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:40,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:07:40,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:40,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:40,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:40,390 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:40,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:40,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:07:40,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813707461] [2021-05-03 14:07:40,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:40,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:40,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:40,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:40,391 INFO L87 Difference]: Start difference. First operand 10571 states and 38651 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:40,613 INFO L93 Difference]: Finished difference Result 13741 states and 49418 transitions. [2021-05-03 14:07:40,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:40,614 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:40,639 INFO L225 Difference]: With dead ends: 13741 [2021-05-03 14:07:40,639 INFO L226 Difference]: Without dead ends: 13741 [2021-05-03 14:07:40,639 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:07:40,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13741 states. [2021-05-03 14:07:40,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13741 to 12995. [2021-05-03 14:07:40,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12995 states, 12994 states have (on average 3.6815453286132063) internal successors, (47838), 12994 states have internal predecessors, (47838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:40,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12995 states to 12995 states and 47838 transitions. [2021-05-03 14:07:40,865 INFO L78 Accepts]: Start accepts. Automaton has 12995 states and 47838 transitions. Word has length 22 [2021-05-03 14:07:40,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:40,865 INFO L480 AbstractCegarLoop]: Abstraction has 12995 states and 47838 transitions. [2021-05-03 14:07:40,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:40,865 INFO L276 IsEmpty]: Start isEmpty. Operand 12995 states and 47838 transitions. [2021-05-03 14:07:40,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:40,871 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:40,871 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:41,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24537,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:41,085 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:41,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:41,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1088085113, now seen corresponding path program 120 times [2021-05-03 14:07:41,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:41,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112077560] [2021-05-03 14:07:41,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:41,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112077560] [2021-05-03 14:07:41,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401598984] [2021-05-03 14:07:41,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:41,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:07:41,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:41,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:41,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:41,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:41,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:41,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22722349] [2021-05-03 14:07:41,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:41,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:41,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:41,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:41,226 INFO L87 Difference]: Start difference. First operand 12995 states and 47838 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:41,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:41,352 INFO L93 Difference]: Finished difference Result 13222 states and 47729 transitions. [2021-05-03 14:07:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:07:41,353 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:41,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:41,378 INFO L225 Difference]: With dead ends: 13222 [2021-05-03 14:07:41,378 INFO L226 Difference]: Without dead ends: 13222 [2021-05-03 14:07:41,378 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:07:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13222 states. [2021-05-03 14:07:41,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13222 to 12777. [2021-05-03 14:07:41,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12777 states, 12776 states have (on average 3.6486380713838447) internal successors, (46615), 12776 states have internal predecessors, (46615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:41,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12777 states to 12777 states and 46615 transitions. [2021-05-03 14:07:41,587 INFO L78 Accepts]: Start accepts. Automaton has 12777 states and 46615 transitions. Word has length 22 [2021-05-03 14:07:41,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:41,587 INFO L480 AbstractCegarLoop]: Abstraction has 12777 states and 46615 transitions. [2021-05-03 14:07:41,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:41,587 INFO L276 IsEmpty]: Start isEmpty. Operand 12777 states and 46615 transitions. [2021-05-03 14:07:41,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:41,592 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:41,592 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:41,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24538 [2021-05-03 14:07:41,793 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash -4794980, now seen corresponding path program 121 times [2021-05-03 14:07:41,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:41,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839695209] [2021-05-03 14:07:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 28 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:41,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839695209] [2021-05-03 14:07:41,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429840836] [2021-05-03 14:07:41,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:41,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:41,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 33 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:41,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:41,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:41,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834622897] [2021-05-03 14:07:41,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:41,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:41,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:41,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:41,904 INFO L87 Difference]: Start difference. First operand 12777 states and 46615 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:42,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:42,101 INFO L93 Difference]: Finished difference Result 13713 states and 49513 transitions. [2021-05-03 14:07:42,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:42,101 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:42,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:42,125 INFO L225 Difference]: With dead ends: 13713 [2021-05-03 14:07:42,125 INFO L226 Difference]: Without dead ends: 13711 [2021-05-03 14:07:42,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:07:42,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13711 states. [2021-05-03 14:07:42,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13711 to 13456. [2021-05-03 14:07:42,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13456 states, 13455 states have (on average 3.6375325157933855) internal successors, (48943), 13455 states have internal predecessors, (48943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:42,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13456 states to 13456 states and 48943 transitions. [2021-05-03 14:07:42,342 INFO L78 Accepts]: Start accepts. Automaton has 13456 states and 48943 transitions. Word has length 22 [2021-05-03 14:07:42,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:42,342 INFO L480 AbstractCegarLoop]: Abstraction has 13456 states and 48943 transitions. [2021-05-03 14:07:42,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:42,342 INFO L276 IsEmpty]: Start isEmpty. Operand 13456 states and 48943 transitions. [2021-05-03 14:07:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:42,347 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:42,347 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:42,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24539,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:42,548 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:42,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:42,548 INFO L82 PathProgramCache]: Analyzing trace with hash 652007197, now seen corresponding path program 122 times [2021-05-03 14:07:42,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:42,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021380803] [2021-05-03 14:07:42,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:42,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021380803] [2021-05-03 14:07:42,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224780909] [2021-05-03 14:07:42,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:42,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:42,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:42,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:42,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:42,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:42,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:42,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990687307] [2021-05-03 14:07:42,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:42,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:42,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:42,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:42,684 INFO L87 Difference]: Start difference. First operand 13456 states and 48943 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:42,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:42,877 INFO L93 Difference]: Finished difference Result 13655 states and 49230 transitions. [2021-05-03 14:07:42,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:42,877 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:42,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:42,902 INFO L225 Difference]: With dead ends: 13655 [2021-05-03 14:07:42,902 INFO L226 Difference]: Without dead ends: 13653 [2021-05-03 14:07:42,902 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:07:42,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13653 states. [2021-05-03 14:07:43,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13653 to 13436. [2021-05-03 14:07:43,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13436 states, 13435 states have (on average 3.621734276144399) internal successors, (48658), 13435 states have internal predecessors, (48658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13436 states to 13436 states and 48658 transitions. [2021-05-03 14:07:43,232 INFO L78 Accepts]: Start accepts. Automaton has 13436 states and 48658 transitions. Word has length 22 [2021-05-03 14:07:43,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:43,232 INFO L480 AbstractCegarLoop]: Abstraction has 13436 states and 48658 transitions. [2021-05-03 14:07:43,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:43,232 INFO L276 IsEmpty]: Start isEmpty. Operand 13436 states and 48658 transitions. [2021-05-03 14:07:43,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:43,238 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:43,238 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:43,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24540,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:43,439 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:43,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:43,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1574425930, now seen corresponding path program 123 times [2021-05-03 14:07:43,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:43,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495107587] [2021-05-03 14:07:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:43,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495107587] [2021-05-03 14:07:43,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796271873] [2021-05-03 14:07:43,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:43,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:07:43,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:43,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:43,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:43,565 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:07:43,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:43,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:07:43,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008282674] [2021-05-03 14:07:43,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:07:43,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:43,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:07:43,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:07:43,566 INFO L87 Difference]: Start difference. First operand 13436 states and 48658 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:43,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:43,657 INFO L93 Difference]: Finished difference Result 13677 states and 48611 transitions. [2021-05-03 14:07:43,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:07:43,657 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:43,678 INFO L225 Difference]: With dead ends: 13677 [2021-05-03 14:07:43,679 INFO L226 Difference]: Without dead ends: 13677 [2021-05-03 14:07:43,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:43,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13677 states. [2021-05-03 14:07:43,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13677 to 13135. [2021-05-03 14:07:43,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 3.607887924470839) internal successors, (47386), 13134 states have internal predecessors, (47386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:43,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 47386 transitions. [2021-05-03 14:07:43,893 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 47386 transitions. Word has length 22 [2021-05-03 14:07:43,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:43,893 INFO L480 AbstractCegarLoop]: Abstraction has 13135 states and 47386 transitions. [2021-05-03 14:07:43,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:43,893 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 47386 transitions. [2021-05-03 14:07:43,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:43,898 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:43,898 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:44,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24541,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:44,100 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:44,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:44,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1932346791, now seen corresponding path program 124 times [2021-05-03 14:07:44,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:44,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027672301] [2021-05-03 14:07:44,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:44,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027672301] [2021-05-03 14:07:44,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801574521] [2021-05-03 14:07:44,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:44,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:44,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:44,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:44,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:44,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:44,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:07:44,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307367730] [2021-05-03 14:07:44,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:44,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:44,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:44,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:44,223 INFO L87 Difference]: Start difference. First operand 13135 states and 47386 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:44,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:44,453 INFO L93 Difference]: Finished difference Result 13337 states and 47678 transitions. [2021-05-03 14:07:44,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:07:44,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:44,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:44,478 INFO L225 Difference]: With dead ends: 13337 [2021-05-03 14:07:44,478 INFO L226 Difference]: Without dead ends: 13335 [2021-05-03 14:07:44,479 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=271, Invalid=485, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:44,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13335 states. [2021-05-03 14:07:44,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13335 to 13135. [2021-05-03 14:07:44,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13135 states, 13134 states have (on average 3.607202680067002) internal successors, (47377), 13134 states have internal predecessors, (47377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13135 states to 13135 states and 47377 transitions. [2021-05-03 14:07:44,705 INFO L78 Accepts]: Start accepts. Automaton has 13135 states and 47377 transitions. Word has length 22 [2021-05-03 14:07:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:44,706 INFO L480 AbstractCegarLoop]: Abstraction has 13135 states and 47377 transitions. [2021-05-03 14:07:44,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 13135 states and 47377 transitions. [2021-05-03 14:07:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:44,711 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:44,711 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:44,913 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24542 [2021-05-03 14:07:44,914 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:44,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:44,914 INFO L82 PathProgramCache]: Analyzing trace with hash -154621404, now seen corresponding path program 125 times [2021-05-03 14:07:44,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:44,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287002060] [2021-05-03 14:07:44,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:44,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287002060] [2021-05-03 14:07:44,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209865538] [2021-05-03 14:07:44,990 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:45,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:07:45,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:45,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:45,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:45,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:45,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:07:45,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105377089] [2021-05-03 14:07:45,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:45,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:45,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:45,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:45,054 INFO L87 Difference]: Start difference. First operand 13135 states and 47377 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:45,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:45,171 INFO L93 Difference]: Finished difference Result 14025 states and 49447 transitions. [2021-05-03 14:07:45,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:07:45,172 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:45,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:45,196 INFO L225 Difference]: With dead ends: 14025 [2021-05-03 14:07:45,196 INFO L226 Difference]: Without dead ends: 14025 [2021-05-03 14:07:45,196 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=136, Invalid=206, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:07:45,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14025 states. [2021-05-03 14:07:45,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14025 to 12987. [2021-05-03 14:07:45,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12987 states, 12986 states have (on average 3.587170799322347) internal successors, (46583), 12986 states have internal predecessors, (46583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:45,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12987 states to 12987 states and 46583 transitions. [2021-05-03 14:07:45,409 INFO L78 Accepts]: Start accepts. Automaton has 12987 states and 46583 transitions. Word has length 22 [2021-05-03 14:07:45,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:45,409 INFO L480 AbstractCegarLoop]: Abstraction has 12987 states and 46583 transitions. [2021-05-03 14:07:45,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:45,409 INFO L276 IsEmpty]: Start isEmpty. Operand 12987 states and 46583 transitions. [2021-05-03 14:07:45,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:45,414 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:45,414 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:45,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24543 [2021-05-03 14:07:45,615 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:45,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:45,615 INFO L82 PathProgramCache]: Analyzing trace with hash -442941795, now seen corresponding path program 126 times [2021-05-03 14:07:45,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:45,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585259539] [2021-05-03 14:07:45,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:45,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585259539] [2021-05-03 14:07:45,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670397903] [2021-05-03 14:07:45,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:45,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:07:45,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:45,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:45,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:45,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:45,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:07:45,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916152895] [2021-05-03 14:07:45,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:45,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:45,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:45,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:45,754 INFO L87 Difference]: Start difference. First operand 12987 states and 46583 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:45,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:45,943 INFO L93 Difference]: Finished difference Result 13344 states and 47452 transitions. [2021-05-03 14:07:45,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:07:45,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:45,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:45,967 INFO L225 Difference]: With dead ends: 13344 [2021-05-03 14:07:45,967 INFO L226 Difference]: Without dead ends: 13341 [2021-05-03 14:07:45,968 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:45,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13341 states. [2021-05-03 14:07:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13341 to 12991. [2021-05-03 14:07:46,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12991 states, 12990 states have (on average 3.5871439568899155) internal successors, (46597), 12990 states have internal predecessors, (46597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:46,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12991 states to 12991 states and 46597 transitions. [2021-05-03 14:07:46,177 INFO L78 Accepts]: Start accepts. Automaton has 12991 states and 46597 transitions. Word has length 22 [2021-05-03 14:07:46,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:46,177 INFO L480 AbstractCegarLoop]: Abstraction has 12991 states and 46597 transitions. [2021-05-03 14:07:46,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:46,177 INFO L276 IsEmpty]: Start isEmpty. Operand 12991 states and 46597 transitions. [2021-05-03 14:07:46,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:46,182 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:46,182 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:46,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24544 [2021-05-03 14:07:46,383 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:46,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:46,383 INFO L82 PathProgramCache]: Analyzing trace with hash 2079486090, now seen corresponding path program 127 times [2021-05-03 14:07:46,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:46,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661299290] [2021-05-03 14:07:46,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:46,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:46,445 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:46,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661299290] [2021-05-03 14:07:46,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241536246] [2021-05-03 14:07:46,445 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 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 [2021-05-03 14:07:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:46,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:46,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:46,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:46,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:07:46,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970924783] [2021-05-03 14:07:46,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:46,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:46,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:46,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:46,512 INFO L87 Difference]: Start difference. First operand 12991 states and 46597 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:46,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:46,669 INFO L93 Difference]: Finished difference Result 23387 states and 84578 transitions. [2021-05-03 14:07:46,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:07:46,669 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:46,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:46,718 INFO L225 Difference]: With dead ends: 23387 [2021-05-03 14:07:46,718 INFO L226 Difference]: Without dead ends: 23387 [2021-05-03 14:07:46,718 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:07:46,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23387 states. [2021-05-03 14:07:47,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23387 to 22894. [2021-05-03 14:07:47,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22894 states, 22893 states have (on average 3.6538679945834973) internal successors, (83648), 22893 states have internal predecessors, (83648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:47,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22894 states to 22894 states and 83648 transitions. [2021-05-03 14:07:47,226 INFO L78 Accepts]: Start accepts. Automaton has 22894 states and 83648 transitions. Word has length 22 [2021-05-03 14:07:47,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:47,226 INFO L480 AbstractCegarLoop]: Abstraction has 22894 states and 83648 transitions. [2021-05-03 14:07:47,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:47,227 INFO L276 IsEmpty]: Start isEmpty. Operand 22894 states and 83648 transitions. [2021-05-03 14:07:47,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:47,232 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:47,232 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:47,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24545 [2021-05-03 14:07:47,432 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:47,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:47,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1516027175, now seen corresponding path program 128 times [2021-05-03 14:07:47,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:47,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168381036] [2021-05-03 14:07:47,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:47,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:47,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168381036] [2021-05-03 14:07:47,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450070435] [2021-05-03 14:07:47,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:47,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:47,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:47,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:47,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:47,562 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:47,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:47,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:07:47,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324039750] [2021-05-03 14:07:47,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:47,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:47,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:47,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:47,563 INFO L87 Difference]: Start difference. First operand 22894 states and 83648 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:47,822 INFO L93 Difference]: Finished difference Result 23234 states and 84479 transitions. [2021-05-03 14:07:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:07:47,823 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:47,875 INFO L225 Difference]: With dead ends: 23234 [2021-05-03 14:07:47,875 INFO L226 Difference]: Without dead ends: 23230 [2021-05-03 14:07:47,875 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 138.7ms TimeCoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:47,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23230 states. [2021-05-03 14:07:48,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23230 to 22894. [2021-05-03 14:07:48,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22894 states, 22893 states have (on average 3.6538243131088106) internal successors, (83647), 22893 states have internal predecessors, (83647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22894 states to 22894 states and 83647 transitions. [2021-05-03 14:07:48,290 INFO L78 Accepts]: Start accepts. Automaton has 22894 states and 83647 transitions. Word has length 22 [2021-05-03 14:07:48,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:48,290 INFO L480 AbstractCegarLoop]: Abstraction has 22894 states and 83647 transitions. [2021-05-03 14:07:48,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 22894 states and 83647 transitions. [2021-05-03 14:07:48,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:48,296 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:48,296 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:48,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24546 [2021-05-03 14:07:48,496 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:48,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:48,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1677625628, now seen corresponding path program 129 times [2021-05-03 14:07:48,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:48,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486412186] [2021-05-03 14:07:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:48,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486412186] [2021-05-03 14:07:48,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935961620] [2021-05-03 14:07:48,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:48,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:07:48,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:48,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:48,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:48,635 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:48,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:48,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:07:48,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227967170] [2021-05-03 14:07:48,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:48,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:48,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:48,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:48,635 INFO L87 Difference]: Start difference. First operand 22894 states and 83647 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:48,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:48,822 INFO L93 Difference]: Finished difference Result 28918 states and 105542 transitions. [2021-05-03 14:07:48,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:07:48,823 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:48,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:48,885 INFO L225 Difference]: With dead ends: 28918 [2021-05-03 14:07:48,885 INFO L226 Difference]: Without dead ends: 28918 [2021-05-03 14:07:48,885 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:07:48,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28918 states. [2021-05-03 14:07:49,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28918 to 28548. [2021-05-03 14:07:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28548 states, 28547 states have (on average 3.676428346236032) internal successors, (104951), 28547 states have internal predecessors, (104951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:49,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28548 states to 28548 states and 104951 transitions. [2021-05-03 14:07:49,448 INFO L78 Accepts]: Start accepts. Automaton has 28548 states and 104951 transitions. Word has length 22 [2021-05-03 14:07:49,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:49,448 INFO L480 AbstractCegarLoop]: Abstraction has 28548 states and 104951 transitions. [2021-05-03 14:07:49,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:49,448 INFO L276 IsEmpty]: Start isEmpty. Operand 28548 states and 104951 transitions. [2021-05-03 14:07:49,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:49,453 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:49,453 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:49,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24547,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:49,654 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:49,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:49,654 INFO L82 PathProgramCache]: Analyzing trace with hash -421935587, now seen corresponding path program 130 times [2021-05-03 14:07:49,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:49,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833875845] [2021-05-03 14:07:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:49,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833875845] [2021-05-03 14:07:49,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6941975] [2021-05-03 14:07:49,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:49,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:49,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:49,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:49,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:49,799 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:49,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:49,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:07:49,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221945790] [2021-05-03 14:07:49,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:49,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:49,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:49,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:49,800 INFO L87 Difference]: Start difference. First operand 28548 states and 104951 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:50,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:50,061 INFO L93 Difference]: Finished difference Result 28872 states and 105754 transitions. [2021-05-03 14:07:50,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:07:50,061 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:50,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:50,126 INFO L225 Difference]: With dead ends: 28872 [2021-05-03 14:07:50,127 INFO L226 Difference]: Without dead ends: 28867 [2021-05-03 14:07:50,127 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:50,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28867 states. [2021-05-03 14:07:50,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28867 to 28548. [2021-05-03 14:07:50,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28548 states, 28547 states have (on average 3.676393316285424) internal successors, (104950), 28547 states have internal predecessors, (104950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:50,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28548 states to 28548 states and 104950 transitions. [2021-05-03 14:07:50,823 INFO L78 Accepts]: Start accepts. Automaton has 28548 states and 104950 transitions. Word has length 22 [2021-05-03 14:07:50,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:50,823 INFO L480 AbstractCegarLoop]: Abstraction has 28548 states and 104950 transitions. [2021-05-03 14:07:50,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:50,823 INFO L276 IsEmpty]: Start isEmpty. Operand 28548 states and 104950 transitions. [2021-05-03 14:07:50,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:50,828 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:50,829 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:51,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24548 [2021-05-03 14:07:51,029 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:51,029 INFO L82 PathProgramCache]: Analyzing trace with hash 2110995402, now seen corresponding path program 131 times [2021-05-03 14:07:51,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:51,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118062649] [2021-05-03 14:07:51,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:51,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:51,098 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:51,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118062649] [2021-05-03 14:07:51,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654198939] [2021-05-03 14:07:51,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:51,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:07:51,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:51,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:51,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:51,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:51,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:07:51,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240280667] [2021-05-03 14:07:51,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:51,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:51,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:51,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:51,162 INFO L87 Difference]: Start difference. First operand 28548 states and 104950 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:51,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:51,410 INFO L93 Difference]: Finished difference Result 31093 states and 113517 transitions. [2021-05-03 14:07:51,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:07:51,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:51,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:51,478 INFO L225 Difference]: With dead ends: 31093 [2021-05-03 14:07:51,478 INFO L226 Difference]: Without dead ends: 31093 [2021-05-03 14:07:51,478 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:07:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31093 states. [2021-05-03 14:07:51,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31093 to 30705. [2021-05-03 14:07:51,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30705 states, 30704 states have (on average 3.6772081813444504) internal successors, (112905), 30704 states have internal predecessors, (112905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:52,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30705 states to 30705 states and 112905 transitions. [2021-05-03 14:07:52,062 INFO L78 Accepts]: Start accepts. Automaton has 30705 states and 112905 transitions. Word has length 22 [2021-05-03 14:07:52,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:52,062 INFO L480 AbstractCegarLoop]: Abstraction has 30705 states and 112905 transitions. [2021-05-03 14:07:52,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:52,062 INFO L276 IsEmpty]: Start isEmpty. Operand 30705 states and 112905 transitions. [2021-05-03 14:07:52,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:52,068 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:52,068 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:52,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24549 [2021-05-03 14:07:52,276 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:52,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:52,276 INFO L82 PathProgramCache]: Analyzing trace with hash -864834727, now seen corresponding path program 132 times [2021-05-03 14:07:52,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:52,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943540447] [2021-05-03 14:07:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:52,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:52,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943540447] [2021-05-03 14:07:52,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334133513] [2021-05-03 14:07:52,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:52,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:07:52,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:52,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:52,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:52,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:52,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:07:52,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044041539] [2021-05-03 14:07:52,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:52,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:52,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:52,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:52,409 INFO L87 Difference]: Start difference. First operand 30705 states and 112905 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:52,703 INFO L93 Difference]: Finished difference Result 31001 states and 113666 transitions. [2021-05-03 14:07:52,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:07:52,704 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:52,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:52,769 INFO L225 Difference]: With dead ends: 31001 [2021-05-03 14:07:52,769 INFO L226 Difference]: Without dead ends: 30995 [2021-05-03 14:07:52,770 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=247, Invalid=509, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:07:52,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30995 states. [2021-05-03 14:07:53,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30995 to 30706. [2021-05-03 14:07:53,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30706 states, 30705 states have (on average 3.6770884220810944) internal successors, (112905), 30705 states have internal predecessors, (112905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:53,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30706 states to 30706 states and 112905 transitions. [2021-05-03 14:07:53,359 INFO L78 Accepts]: Start accepts. Automaton has 30706 states and 112905 transitions. Word has length 22 [2021-05-03 14:07:53,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:53,359 INFO L480 AbstractCegarLoop]: Abstraction has 30706 states and 112905 transitions. [2021-05-03 14:07:53,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:53,359 INFO L276 IsEmpty]: Start isEmpty. Operand 30706 states and 112905 transitions. [2021-05-03 14:07:53,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:53,364 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:53,365 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:53,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24550,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:53,565 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:53,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:53,565 INFO L82 PathProgramCache]: Analyzing trace with hash -700836956, now seen corresponding path program 133 times [2021-05-03 14:07:53,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:53,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868868332] [2021-05-03 14:07:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:53,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:53,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868868332] [2021-05-03 14:07:53,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854140790] [2021-05-03 14:07:53,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:07:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:53,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:53,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:07:53,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:53,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:07:53,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273970923] [2021-05-03 14:07:53,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:07:53,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:53,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:07:53,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:07:53,696 INFO L87 Difference]: Start difference. First operand 30706 states and 112905 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:54,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:54,153 INFO L93 Difference]: Finished difference Result 32605 states and 118879 transitions. [2021-05-03 14:07:54,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:07:54,153 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:54,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:54,220 INFO L225 Difference]: With dead ends: 32605 [2021-05-03 14:07:54,220 INFO L226 Difference]: Without dead ends: 32605 [2021-05-03 14:07:54,221 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 219.0ms TimeCoverageRelationStatistics Valid=456, Invalid=876, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:07:54,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32605 states. [2021-05-03 14:07:54,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32605 to 32065. [2021-05-03 14:07:54,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32065 states, 32064 states have (on average 3.6761477045908184) internal successors, (117872), 32064 states have internal predecessors, (117872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32065 states to 32065 states and 117872 transitions. [2021-05-03 14:07:54,796 INFO L78 Accepts]: Start accepts. Automaton has 32065 states and 117872 transitions. Word has length 22 [2021-05-03 14:07:54,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:54,796 INFO L480 AbstractCegarLoop]: Abstraction has 32065 states and 117872 transitions. [2021-05-03 14:07:54,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:54,797 INFO L276 IsEmpty]: Start isEmpty. Operand 32065 states and 117872 transitions. [2021-05-03 14:07:54,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:54,802 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:54,802 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:55,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24551,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:55,003 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:55,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:55,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1675189249, now seen corresponding path program 134 times [2021-05-03 14:07:55,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:55,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129217711] [2021-05-03 14:07:55,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:55,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:55,049 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:07:55,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129217711] [2021-05-03 14:07:55,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516145678] [2021-05-03 14:07:55,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:55,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:07:55,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:55,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:55,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:07:55,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:55,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:07:55,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347573412] [2021-05-03 14:07:55,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:07:55,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:55,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:07:55,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:07:55,108 INFO L87 Difference]: Start difference. First operand 32065 states and 117872 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:55,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:55,308 INFO L93 Difference]: Finished difference Result 32258 states and 118308 transitions. [2021-05-03 14:07:55,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:07:55,308 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:55,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:55,390 INFO L225 Difference]: With dead ends: 32258 [2021-05-03 14:07:55,390 INFO L226 Difference]: Without dead ends: 32258 [2021-05-03 14:07:55,391 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:07:55,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32258 states. [2021-05-03 14:07:55,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32258 to 32110. [2021-05-03 14:07:55,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32110 states, 32109 states have (on average 3.6754492509888195) internal successors, (118015), 32109 states have internal predecessors, (118015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:56,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32110 states to 32110 states and 118015 transitions. [2021-05-03 14:07:56,046 INFO L78 Accepts]: Start accepts. Automaton has 32110 states and 118015 transitions. Word has length 22 [2021-05-03 14:07:56,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:56,046 INFO L480 AbstractCegarLoop]: Abstraction has 32110 states and 118015 transitions. [2021-05-03 14:07:56,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:56,046 INFO L276 IsEmpty]: Start isEmpty. Operand 32110 states and 118015 transitions. [2021-05-03 14:07:56,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:56,052 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:56,052 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:56,253 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24552,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:56,253 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:56,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:56,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1842033802, now seen corresponding path program 135 times [2021-05-03 14:07:56,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:56,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382548253] [2021-05-03 14:07:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:56,300 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:07:56,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382548253] [2021-05-03 14:07:56,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356833573] [2021-05-03 14:07:56,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:56,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:07:56,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:56,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:56,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 43 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-03 14:07:56,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:56,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:07:56,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081754834] [2021-05-03 14:07:56,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:07:56,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:56,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:07:56,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:07:56,356 INFO L87 Difference]: Start difference. First operand 32110 states and 118015 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:56,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:56,634 INFO L93 Difference]: Finished difference Result 36772 states and 134931 transitions. [2021-05-03 14:07:56,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:07:56,634 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:56,714 INFO L225 Difference]: With dead ends: 36772 [2021-05-03 14:07:56,714 INFO L226 Difference]: Without dead ends: 36768 [2021-05-03 14:07:56,714 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:07:56,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36768 states. [2021-05-03 14:07:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36768 to 36566. [2021-05-03 14:07:57,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36566 states, 36565 states have (on average 3.6828114316969778) internal successors, (134662), 36565 states have internal predecessors, (134662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:57,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36566 states to 36566 states and 134662 transitions. [2021-05-03 14:07:57,610 INFO L78 Accepts]: Start accepts. Automaton has 36566 states and 134662 transitions. Word has length 22 [2021-05-03 14:07:57,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:57,610 INFO L480 AbstractCegarLoop]: Abstraction has 36566 states and 134662 transitions. [2021-05-03 14:07:57,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:57,610 INFO L276 IsEmpty]: Start isEmpty. Operand 36566 states and 134662 transitions. [2021-05-03 14:07:57,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:57,616 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:57,617 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:57,817 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24553 [2021-05-03 14:07:57,817 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:57,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:57,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1592090717, now seen corresponding path program 136 times [2021-05-03 14:07:57,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:57,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125557437] [2021-05-03 14:07:57,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:57,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:07:57,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125557437] [2021-05-03 14:07:57,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171613264] [2021-05-03 14:07:57,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:57,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:07:57,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:57,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:57,927 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:07:57,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:57,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:07:57,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558769325] [2021-05-03 14:07:57,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:07:57,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:57,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:07:57,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:07:57,928 INFO L87 Difference]: Start difference. First operand 36566 states and 134662 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:58,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:58,208 INFO L93 Difference]: Finished difference Result 36756 states and 135097 transitions. [2021-05-03 14:07:58,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:07:58,208 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:58,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:58,325 INFO L225 Difference]: With dead ends: 36756 [2021-05-03 14:07:58,325 INFO L226 Difference]: Without dead ends: 36753 [2021-05-03 14:07:58,325 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:07:58,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36753 states. [2021-05-03 14:07:59,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36753 to 36566. [2021-05-03 14:07:59,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36566 states, 36565 states have (on average 3.682756734582251) internal successors, (134660), 36565 states have internal predecessors, (134660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:59,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36566 states to 36566 states and 134660 transitions. [2021-05-03 14:07:59,244 INFO L78 Accepts]: Start accepts. Automaton has 36566 states and 134660 transitions. Word has length 22 [2021-05-03 14:07:59,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:07:59,245 INFO L480 AbstractCegarLoop]: Abstraction has 36566 states and 134660 transitions. [2021-05-03 14:07:59,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:59,245 INFO L276 IsEmpty]: Start isEmpty. Operand 36566 states and 134660 transitions. [2021-05-03 14:07:59,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:07:59,252 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:07:59,252 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:07:59,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24554 [2021-05-03 14:07:59,473 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:07:59,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:07:59,473 INFO L82 PathProgramCache]: Analyzing trace with hash -180448694, now seen corresponding path program 137 times [2021-05-03 14:07:59,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:07:59,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092739108] [2021-05-03 14:07:59,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:07:59,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:07:59,544 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:07:59,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092739108] [2021-05-03 14:07:59,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919488296] [2021-05-03 14:07:59,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:07:59,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:07:59,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:07:59,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:07:59,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:07:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 16 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:07:59,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:07:59,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:07:59,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907969030] [2021-05-03 14:07:59,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:07:59,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:07:59,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:07:59,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:07:59,613 INFO L87 Difference]: Start difference. First operand 36566 states and 134660 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:07:59,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:07:59,876 INFO L93 Difference]: Finished difference Result 38596 states and 141165 transitions. [2021-05-03 14:07:59,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:07:59,876 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:07:59,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:07:59,974 INFO L225 Difference]: With dead ends: 38596 [2021-05-03 14:07:59,974 INFO L226 Difference]: Without dead ends: 38596 [2021-05-03 14:07:59,974 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:08:00,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38596 states. [2021-05-03 14:08:00,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38596 to 38072. [2021-05-03 14:08:00,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38072 states, 38071 states have (on average 3.6814373144913453) internal successors, (140156), 38071 states have internal predecessors, (140156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:00,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38072 states to 38072 states and 140156 transitions. [2021-05-03 14:08:00,901 INFO L78 Accepts]: Start accepts. Automaton has 38072 states and 140156 transitions. Word has length 22 [2021-05-03 14:08:00,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:00,902 INFO L480 AbstractCegarLoop]: Abstraction has 38072 states and 140156 transitions. [2021-05-03 14:08:00,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:00,902 INFO L276 IsEmpty]: Start isEmpty. Operand 38072 states and 140156 transitions. [2021-05-03 14:08:00,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:00,909 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:00,910 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:01,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24555 [2021-05-03 14:08:01,131 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:01,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:01,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1085744451, now seen corresponding path program 138 times [2021-05-03 14:08:01,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:01,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764396538] [2021-05-03 14:08:01,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:01,200 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:01,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764396538] [2021-05-03 14:08:01,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884639112] [2021-05-03 14:08:01,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:01,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-03 14:08:01,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:01,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:01,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:08:01,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:01,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:08:01,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084903475] [2021-05-03 14:08:01,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:08:01,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:01,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:08:01,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:08:01,262 INFO L87 Difference]: Start difference. First operand 38072 states and 140156 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:01,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:01,753 INFO L93 Difference]: Finished difference Result 38447 states and 141068 transitions. [2021-05-03 14:08:01,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:08:01,754 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:01,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:01,865 INFO L225 Difference]: With dead ends: 38447 [2021-05-03 14:08:01,865 INFO L226 Difference]: Without dead ends: 38444 [2021-05-03 14:08:01,865 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 129.6ms TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:08:01,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38444 states. [2021-05-03 14:08:02,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38444 to 38072. [2021-05-03 14:08:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38072 states, 38071 states have (on average 3.6813322476425627) internal successors, (140152), 38071 states have internal predecessors, (140152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:03,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38072 states to 38072 states and 140152 transitions. [2021-05-03 14:08:03,044 INFO L78 Accepts]: Start accepts. Automaton has 38072 states and 140152 transitions. Word has length 22 [2021-05-03 14:08:03,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:03,044 INFO L480 AbstractCegarLoop]: Abstraction has 38072 states and 140152 transitions. [2021-05-03 14:08:03,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:03,045 INFO L276 IsEmpty]: Start isEmpty. Operand 38072 states and 140152 transitions. [2021-05-03 14:08:03,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:03,053 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:03,053 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:03,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24556 [2021-05-03 14:08:03,275 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:03,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:03,275 INFO L82 PathProgramCache]: Analyzing trace with hash -686794960, now seen corresponding path program 139 times [2021-05-03 14:08:03,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:03,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687526014] [2021-05-03 14:08:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:03,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:03,339 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:03,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687526014] [2021-05-03 14:08:03,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672476375] [2021-05-03 14:08:03,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:03,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:03,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:08:03,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:03,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:08:03,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477691691] [2021-05-03 14:08:03,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:08:03,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:03,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:08:03,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:08:03,674 INFO L87 Difference]: Start difference. First operand 38072 states and 140152 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:04,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:04,326 INFO L93 Difference]: Finished difference Result 47743 states and 174806 transitions. [2021-05-03 14:08:04,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:08:04,326 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:04,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:04,635 INFO L225 Difference]: With dead ends: 47743 [2021-05-03 14:08:04,635 INFO L226 Difference]: Without dead ends: 47743 [2021-05-03 14:08:04,636 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 163.3ms TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:08:04,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47743 states. [2021-05-03 14:08:05,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47743 to 46337. [2021-05-03 14:08:05,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46337 states, 46336 states have (on average 3.694190262430939) internal successors, (171174), 46336 states have internal predecessors, (171174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:06,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46337 states to 46337 states and 171174 transitions. [2021-05-03 14:08:06,129 INFO L78 Accepts]: Start accepts. Automaton has 46337 states and 171174 transitions. Word has length 22 [2021-05-03 14:08:06,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:06,129 INFO L480 AbstractCegarLoop]: Abstraction has 46337 states and 171174 transitions. [2021-05-03 14:08:06,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:06,129 INFO L276 IsEmpty]: Start isEmpty. Operand 46337 states and 171174 transitions. [2021-05-03 14:08:06,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:06,137 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:06,137 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:06,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24557,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:06,338 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:06,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:06,338 INFO L82 PathProgramCache]: Analyzing trace with hash 12659071, now seen corresponding path program 140 times [2021-05-03 14:08:06,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:06,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027977973] [2021-05-03 14:08:06,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:06,407 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:06,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027977973] [2021-05-03 14:08:06,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023554012] [2021-05-03 14:08:06,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:06,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:06,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:06,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:06,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:06,486 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:08:06,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:06,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:08:06,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330037403] [2021-05-03 14:08:06,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:08:06,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:06,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:08:06,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:08:06,498 INFO L87 Difference]: Start difference. First operand 46337 states and 171174 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:07,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:07,092 INFO L93 Difference]: Finished difference Result 46705 states and 172114 transitions. [2021-05-03 14:08:07,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:08:07,093 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:07,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:07,250 INFO L225 Difference]: With dead ends: 46705 [2021-05-03 14:08:07,251 INFO L226 Difference]: Without dead ends: 46701 [2021-05-03 14:08:07,251 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:08:07,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46701 states. [2021-05-03 14:08:08,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46701 to 46347. [2021-05-03 14:08:08,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46347 states, 46346 states have (on average 3.693911017132007) internal successors, (171198), 46346 states have internal predecessors, (171198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:08,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46347 states to 46347 states and 171198 transitions. [2021-05-03 14:08:08,832 INFO L78 Accepts]: Start accepts. Automaton has 46347 states and 171198 transitions. Word has length 22 [2021-05-03 14:08:08,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:08,832 INFO L480 AbstractCegarLoop]: Abstraction has 46347 states and 171198 transitions. [2021-05-03 14:08:08,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 46347 states and 171198 transitions. [2021-05-03 14:08:08,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:08,840 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:08,840 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:09,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24558 [2021-05-03 14:08:09,041 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:09,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:09,041 INFO L82 PathProgramCache]: Analyzing trace with hash -148939382, now seen corresponding path program 141 times [2021-05-03 14:08:09,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:09,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789787357] [2021-05-03 14:08:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:09,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:09,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789787357] [2021-05-03 14:08:09,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375329080] [2021-05-03 14:08:09,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:09,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:08:09,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:09,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:09,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:08:09,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:09,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:08:09,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579718417] [2021-05-03 14:08:09,209 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:08:09,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:09,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:08:09,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:08:09,210 INFO L87 Difference]: Start difference. First operand 46347 states and 171198 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:10,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:10,268 INFO L93 Difference]: Finished difference Result 49378 states and 181574 transitions. [2021-05-03 14:08:10,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:08:10,269 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:10,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:10,434 INFO L225 Difference]: With dead ends: 49378 [2021-05-03 14:08:10,434 INFO L226 Difference]: Without dead ends: 49378 [2021-05-03 14:08:10,435 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 526.2ms TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:08:10,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49378 states. [2021-05-03 14:08:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49378 to 48899. [2021-05-03 14:08:11,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48899 states, 48898 states have (on average 3.6954272158370487) internal successors, (180699), 48898 states have internal predecessors, (180699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:11,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48899 states to 48899 states and 180699 transitions. [2021-05-03 14:08:11,932 INFO L78 Accepts]: Start accepts. Automaton has 48899 states and 180699 transitions. Word has length 22 [2021-05-03 14:08:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:11,932 INFO L480 AbstractCegarLoop]: Abstraction has 48899 states and 180699 transitions. [2021-05-03 14:08:11,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:11,932 INFO L276 IsEmpty]: Start isEmpty. Operand 48899 states and 180699 transitions. [2021-05-03 14:08:11,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:11,939 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:11,939 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:12,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24559 [2021-05-03 14:08:12,160 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:12,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:12,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1726087907, now seen corresponding path program 142 times [2021-05-03 14:08:12,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:12,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745782962] [2021-05-03 14:08:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 19 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:12,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745782962] [2021-05-03 14:08:12,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363801949] [2021-05-03 14:08:12,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:12,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:08:12,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:12,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:12,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:12,516 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:12,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:12,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:08:12,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681437048] [2021-05-03 14:08:12,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:08:12,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:12,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:08:12,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:08:12,517 INFO L87 Difference]: Start difference. First operand 48899 states and 180699 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:12,928 INFO L93 Difference]: Finished difference Result 49336 states and 181769 transitions. [2021-05-03 14:08:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:08:12,933 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:12,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:13,092 INFO L225 Difference]: With dead ends: 49336 [2021-05-03 14:08:13,092 INFO L226 Difference]: Without dead ends: 49333 [2021-05-03 14:08:13,093 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 140.5ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:08:13,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49333 states. [2021-05-03 14:08:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49333 to 48899. [2021-05-03 14:08:14,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48899 states, 48898 states have (on average 3.6953045114319605) internal successors, (180693), 48898 states have internal predecessors, (180693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:14,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48899 states to 48899 states and 180693 transitions. [2021-05-03 14:08:14,715 INFO L78 Accepts]: Start accepts. Automaton has 48899 states and 180693 transitions. Word has length 22 [2021-05-03 14:08:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:14,715 INFO L480 AbstractCegarLoop]: Abstraction has 48899 states and 180693 transitions. [2021-05-03 14:08:14,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:14,715 INFO L276 IsEmpty]: Start isEmpty. Operand 48899 states and 180693 transitions. [2021-05-03 14:08:14,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:14,724 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:14,724 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:14,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24560,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:14,937 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:14,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:14,937 INFO L82 PathProgramCache]: Analyzing trace with hash 796339978, now seen corresponding path program 143 times [2021-05-03 14:08:14,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:14,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489332412] [2021-05-03 14:08:14,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:14,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:15,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489332412] [2021-05-03 14:08:15,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735463172] [2021-05-03 14:08:15,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:15,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:08:15,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:15,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:15,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:15,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:15,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:08:15,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685614937] [2021-05-03 14:08:15,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:08:15,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:15,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:08:15,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:08:15,108 INFO L87 Difference]: Start difference. First operand 48899 states and 180693 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:15,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:15,541 INFO L93 Difference]: Finished difference Result 55383 states and 202292 transitions. [2021-05-03 14:08:15,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:08:15,541 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:15,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:16,152 INFO L225 Difference]: With dead ends: 55383 [2021-05-03 14:08:16,152 INFO L226 Difference]: Without dead ends: 55383 [2021-05-03 14:08:16,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:08:16,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55383 states. [2021-05-03 14:08:17,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55383 to 46016. [2021-05-03 14:08:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46016 states, 46015 states have (on average 3.6818428773226124) internal successors, (169420), 46015 states have internal predecessors, (169420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:17,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46016 states to 46016 states and 169420 transitions. [2021-05-03 14:08:17,423 INFO L78 Accepts]: Start accepts. Automaton has 46016 states and 169420 transitions. Word has length 22 [2021-05-03 14:08:17,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:17,423 INFO L480 AbstractCegarLoop]: Abstraction has 46016 states and 169420 transitions. [2021-05-03 14:08:17,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:17,423 INFO L276 IsEmpty]: Start isEmpty. Operand 46016 states and 169420 transitions. [2021-05-03 14:08:17,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:17,432 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:17,432 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:17,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24561,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:17,653 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:17,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:17,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1495794009, now seen corresponding path program 144 times [2021-05-03 14:08:17,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:17,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589925005] [2021-05-03 14:08:17,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:17,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:17,762 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:17,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589925005] [2021-05-03 14:08:17,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839518318] [2021-05-03 14:08:17,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:17,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:08:17,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:17,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:17,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:17,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:17,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:08:17,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662551773] [2021-05-03 14:08:17,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:08:17,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:17,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:08:17,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:08:17,824 INFO L87 Difference]: Start difference. First operand 46016 states and 169420 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:18,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:18,226 INFO L93 Difference]: Finished difference Result 46465 states and 170554 transitions. [2021-05-03 14:08:18,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:08:18,226 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:18,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:18,721 INFO L225 Difference]: With dead ends: 46465 [2021-05-03 14:08:18,722 INFO L226 Difference]: Without dead ends: 46461 [2021-05-03 14:08:18,722 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:08:18,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46461 states. [2021-05-03 14:08:19,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46461 to 46018. [2021-05-03 14:08:19,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46018 states, 46017 states have (on average 3.6818349740313363) internal successors, (169427), 46017 states have internal predecessors, (169427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:19,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46018 states to 46018 states and 169427 transitions. [2021-05-03 14:08:19,967 INFO L78 Accepts]: Start accepts. Automaton has 46018 states and 169427 transitions. Word has length 22 [2021-05-03 14:08:19,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:19,967 INFO L480 AbstractCegarLoop]: Abstraction has 46018 states and 169427 transitions. [2021-05-03 14:08:19,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:19,967 INFO L276 IsEmpty]: Start isEmpty. Operand 46018 states and 169427 transitions. [2021-05-03 14:08:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:19,976 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:19,976 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:20,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24562,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:20,197 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:20,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:20,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1334195556, now seen corresponding path program 145 times [2021-05-03 14:08:20,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:20,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197171517] [2021-05-03 14:08:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:20,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197171517] [2021-05-03 14:08:20,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102932340] [2021-05-03 14:08:20,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:20,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:20,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:20,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:20,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:20,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:08:20,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904715731] [2021-05-03 14:08:20,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:08:20,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:20,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:08:20,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:08:20,353 INFO L87 Difference]: Start difference. First operand 46018 states and 169427 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:20,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:20,815 INFO L93 Difference]: Finished difference Result 53081 states and 194778 transitions. [2021-05-03 14:08:20,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:08:20,816 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:20,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:20,998 INFO L225 Difference]: With dead ends: 53081 [2021-05-03 14:08:20,998 INFO L226 Difference]: Without dead ends: 53081 [2021-05-03 14:08:20,998 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:08:21,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53081 states. [2021-05-03 14:08:22,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53081 to 50036. [2021-05-03 14:08:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50036 states, 50035 states have (on average 3.6892775057459777) internal successors, (184593), 50035 states have internal predecessors, (184593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:22,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50036 states to 50036 states and 184593 transitions. [2021-05-03 14:08:22,988 INFO L78 Accepts]: Start accepts. Automaton has 50036 states and 184593 transitions. Word has length 22 [2021-05-03 14:08:22,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:22,988 INFO L480 AbstractCegarLoop]: Abstraction has 50036 states and 184593 transitions. [2021-05-03 14:08:22,988 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:22,988 INFO L276 IsEmpty]: Start isEmpty. Operand 50036 states and 184593 transitions. [2021-05-03 14:08:22,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:22,997 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:22,997 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:23,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24563,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:23,212 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:23,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:23,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081699, now seen corresponding path program 146 times [2021-05-03 14:08:23,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:23,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796049407] [2021-05-03 14:08:23,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:23,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796049407] [2021-05-03 14:08:23,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56600474] [2021-05-03 14:08:23,297 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:08:23,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:23,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:23,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:23,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:23,365 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:23,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:23,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:08:23,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093308700] [2021-05-03 14:08:23,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:08:23,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:23,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:08:23,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:08:23,366 INFO L87 Difference]: Start difference. First operand 50036 states and 184593 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:23,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:23,852 INFO L93 Difference]: Finished difference Result 50456 states and 185678 transitions. [2021-05-03 14:08:23,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:08:23,852 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:23,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:24,035 INFO L225 Difference]: With dead ends: 50456 [2021-05-03 14:08:24,036 INFO L226 Difference]: Without dead ends: 50451 [2021-05-03 14:08:24,036 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 187.4ms TimeCoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:08:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50451 states. [2021-05-03 14:08:25,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50451 to 50049. [2021-05-03 14:08:25,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50049 states, 50048 states have (on average 3.6890185421994883) internal successors, (184628), 50048 states have internal predecessors, (184628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:26,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50049 states to 50049 states and 184628 transitions. [2021-05-03 14:08:26,125 INFO L78 Accepts]: Start accepts. Automaton has 50049 states and 184628 transitions. Word has length 22 [2021-05-03 14:08:26,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:26,125 INFO L480 AbstractCegarLoop]: Abstraction has 50049 states and 184628 transitions. [2021-05-03 14:08:26,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:26,125 INFO L276 IsEmpty]: Start isEmpty. Operand 50049 states and 184628 transitions. [2021-05-03 14:08:26,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:26,135 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:26,135 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:26,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24564 [2021-05-03 14:08:26,349 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:26,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:26,349 INFO L82 PathProgramCache]: Analyzing trace with hash 827849290, now seen corresponding path program 147 times [2021-05-03 14:08:26,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:26,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115837935] [2021-05-03 14:08:26,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:26,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:26,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115837935] [2021-05-03 14:08:26,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877708228] [2021-05-03 14:08:26,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:08:26,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:08:26,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:26,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:26,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:26,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:26,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:08:26,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686765195] [2021-05-03 14:08:26,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:08:26,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:26,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:08:26,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:08:26,510 INFO L87 Difference]: Start difference. First operand 50049 states and 184628 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:27,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:27,082 INFO L93 Difference]: Finished difference Result 51683 states and 189732 transitions. [2021-05-03 14:08:27,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:08:27,083 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:27,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:27,266 INFO L225 Difference]: With dead ends: 51683 [2021-05-03 14:08:27,266 INFO L226 Difference]: Without dead ends: 51683 [2021-05-03 14:08:27,267 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 207.8ms TimeCoverageRelationStatistics Valid=303, Invalid=567, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:08:27,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51683 states. [2021-05-03 14:08:28,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51683 to 51187. [2021-05-03 14:08:28,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51187 states, 51186 states have (on average 3.689856601414449) internal successors, (188869), 51186 states have internal predecessors, (188869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:28,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51187 states to 51187 states and 188869 transitions. [2021-05-03 14:08:28,958 INFO L78 Accepts]: Start accepts. Automaton has 51187 states and 188869 transitions. Word has length 22 [2021-05-03 14:08:28,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:28,958 INFO L480 AbstractCegarLoop]: Abstraction has 51187 states and 188869 transitions. [2021-05-03 14:08:28,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:28,958 INFO L276 IsEmpty]: Start isEmpty. Operand 51187 states and 188869 transitions. [2021-05-03 14:08:28,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:28,966 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:28,966 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:29,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24565 [2021-05-03 14:08:29,181 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:29,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:29,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1301422211, now seen corresponding path program 148 times [2021-05-03 14:08:29,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:29,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995697876] [2021-05-03 14:08:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:29,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995697876] [2021-05-03 14:08:29,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76482275] [2021-05-03 14:08:29,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:08:29,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:08:29,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:29,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:29,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:29,324 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:29,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:29,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:08:29,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821662049] [2021-05-03 14:08:29,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:08:29,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:29,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:08:29,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:08:29,325 INFO L87 Difference]: Start difference. First operand 51187 states and 188869 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:30,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:30,229 INFO L93 Difference]: Finished difference Result 51540 states and 189639 transitions. [2021-05-03 14:08:30,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:08:30,243 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:30,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:30,463 INFO L225 Difference]: With dead ends: 51540 [2021-05-03 14:08:30,463 INFO L226 Difference]: Without dead ends: 51537 [2021-05-03 14:08:30,463 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 182.6ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:08:30,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51537 states. [2021-05-03 14:08:31,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51537 to 51187. [2021-05-03 14:08:31,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51187 states, 51186 states have (on average 3.6897003086781544) internal successors, (188861), 51186 states have internal predecessors, (188861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:32,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51187 states to 51187 states and 188861 transitions. [2021-05-03 14:08:32,068 INFO L78 Accepts]: Start accepts. Automaton has 51187 states and 188861 transitions. Word has length 22 [2021-05-03 14:08:32,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:32,068 INFO L480 AbstractCegarLoop]: Abstraction has 51187 states and 188861 transitions. [2021-05-03 14:08:32,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:32,068 INFO L276 IsEmpty]: Start isEmpty. Operand 51187 states and 188861 transitions. [2021-05-03 14:08:32,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:32,076 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:32,076 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:32,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24566 [2021-05-03 14:08:32,297 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:32,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:32,297 INFO L82 PathProgramCache]: Analyzing trace with hash -471117200, now seen corresponding path program 149 times [2021-05-03 14:08:32,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:32,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606915540] [2021-05-03 14:08:32,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:32,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606915540] [2021-05-03 14:08:32,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538442533] [2021-05-03 14:08:32,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:08:32,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:08:32,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:32,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:32,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:32,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:32,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:08:32,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512259882] [2021-05-03 14:08:32,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:08:32,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:32,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:08:32,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:08:32,439 INFO L87 Difference]: Start difference. First operand 51187 states and 188861 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:33,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:33,193 INFO L93 Difference]: Finished difference Result 54243 states and 197469 transitions. [2021-05-03 14:08:33,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:08:33,194 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:33,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:33,371 INFO L225 Difference]: With dead ends: 54243 [2021-05-03 14:08:33,371 INFO L226 Difference]: Without dead ends: 54243 [2021-05-03 14:08:33,371 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:08:33,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54243 states. [2021-05-03 14:08:34,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54243 to 19825. [2021-05-03 14:08:34,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19825 states, 19824 states have (on average 3.5682001614205006) internal successors, (70736), 19824 states have internal predecessors, (70736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:34,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19825 states to 19825 states and 70736 transitions. [2021-05-03 14:08:34,278 INFO L78 Accepts]: Start accepts. Automaton has 19825 states and 70736 transitions. Word has length 22 [2021-05-03 14:08:34,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:34,278 INFO L480 AbstractCegarLoop]: Abstraction has 19825 states and 70736 transitions. [2021-05-03 14:08:34,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:34,278 INFO L276 IsEmpty]: Start isEmpty. Operand 19825 states and 70736 transitions. [2021-05-03 14:08:34,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:34,286 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:34,286 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:34,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24567 [2021-05-03 14:08:34,507 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:34,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:34,507 INFO L82 PathProgramCache]: Analyzing trace with hash 228336831, now seen corresponding path program 150 times [2021-05-03 14:08:34,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:34,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270371280] [2021-05-03 14:08:34,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:34,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270371280] [2021-05-03 14:08:34,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021883738] [2021-05-03 14:08:34,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:34,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:08:34,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:34,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:34,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:34,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:34,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:08:34,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119143362] [2021-05-03 14:08:34,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:08:34,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:34,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:08:34,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:08:34,676 INFO L87 Difference]: Start difference. First operand 19825 states and 70736 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:35,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:35,713 INFO L93 Difference]: Finished difference Result 20359 states and 72090 transitions. [2021-05-03 14:08:35,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:08:35,713 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:35,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:35,762 INFO L225 Difference]: With dead ends: 20359 [2021-05-03 14:08:35,762 INFO L226 Difference]: Without dead ends: 20355 [2021-05-03 14:08:35,762 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 562.4ms TimeCoverageRelationStatistics Valid=274, Invalid=538, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:08:35,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20355 states. [2021-05-03 14:08:36,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20355 to 19828. [2021-05-03 14:08:36,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19828 states, 19827 states have (on average 3.568215060271347) internal successors, (70747), 19827 states have internal predecessors, (70747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:36,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19828 states to 19828 states and 70747 transitions. [2021-05-03 14:08:36,193 INFO L78 Accepts]: Start accepts. Automaton has 19828 states and 70747 transitions. Word has length 22 [2021-05-03 14:08:36,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:36,193 INFO L480 AbstractCegarLoop]: Abstraction has 19828 states and 70747 transitions. [2021-05-03 14:08:36,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:36,193 INFO L276 IsEmpty]: Start isEmpty. Operand 19828 states and 70747 transitions. [2021-05-03 14:08:36,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:36,201 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:36,201 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:36,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24568 [2021-05-03 14:08:36,417 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:36,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:36,418 INFO L82 PathProgramCache]: Analyzing trace with hash 66738378, now seen corresponding path program 151 times [2021-05-03 14:08:36,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:36,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836016801] [2021-05-03 14:08:36,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:36,495 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:36,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836016801] [2021-05-03 14:08:36,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327705108] [2021-05-03 14:08:36,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:08:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:36,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:36,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:36,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:36,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:08:36,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001665985] [2021-05-03 14:08:36,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:08:36,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:36,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:08:36,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:08:36,563 INFO L87 Difference]: Start difference. First operand 19828 states and 70747 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:36,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:36,818 INFO L93 Difference]: Finished difference Result 28252 states and 100763 transitions. [2021-05-03 14:08:36,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:08:36,819 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:36,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:36,900 INFO L225 Difference]: With dead ends: 28252 [2021-05-03 14:08:36,900 INFO L226 Difference]: Without dead ends: 28252 [2021-05-03 14:08:36,900 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:08:36,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28252 states. [2021-05-03 14:08:37,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28252 to 19605. [2021-05-03 14:08:37,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19605 states, 19604 states have (on average 3.569118547235258) internal successors, (69969), 19604 states have internal predecessors, (69969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:37,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19605 states to 19605 states and 69969 transitions. [2021-05-03 14:08:37,567 INFO L78 Accepts]: Start accepts. Automaton has 19605 states and 69969 transitions. Word has length 22 [2021-05-03 14:08:37,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:37,567 INFO L480 AbstractCegarLoop]: Abstraction has 19605 states and 69969 transitions. [2021-05-03 14:08:37,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:37,568 INFO L276 IsEmpty]: Start isEmpty. Operand 19605 states and 69969 transitions. [2021-05-03 14:08:37,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:37,575 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:37,575 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:37,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24569,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:37,797 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:37,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:37,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1322428419, now seen corresponding path program 152 times [2021-05-03 14:08:37,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:37,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259779132] [2021-05-03 14:08:37,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:37,905 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:37,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259779132] [2021-05-03 14:08:37,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293647162] [2021-05-03 14:08:37,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:37,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:37,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:37,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:37,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:37,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:37,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:08:37,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30276460] [2021-05-03 14:08:37,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:08:37,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:37,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:08:37,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:08:37,973 INFO L87 Difference]: Start difference. First operand 19605 states and 69969 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:38,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:38,248 INFO L93 Difference]: Finished difference Result 20123 states and 71290 transitions. [2021-05-03 14:08:38,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:08:38,249 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:38,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:38,298 INFO L225 Difference]: With dead ends: 20123 [2021-05-03 14:08:38,298 INFO L226 Difference]: Without dead ends: 20118 [2021-05-03 14:08:38,299 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=270, Invalid=542, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:08:38,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20118 states. [2021-05-03 14:08:38,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20118 to 19607. [2021-05-03 14:08:38,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19607 states, 19606 states have (on average 3.5691114964806694) internal successors, (69976), 19606 states have internal predecessors, (69976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:38,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19607 states to 19607 states and 69976 transitions. [2021-05-03 14:08:38,905 INFO L78 Accepts]: Start accepts. Automaton has 19607 states and 69976 transitions. Word has length 22 [2021-05-03 14:08:38,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:38,905 INFO L480 AbstractCegarLoop]: Abstraction has 19607 states and 69976 transitions. [2021-05-03 14:08:38,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:38,905 INFO L276 IsEmpty]: Start isEmpty. Operand 19607 states and 69976 transitions. [2021-05-03 14:08:38,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:38,913 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:38,913 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:39,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24570,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:39,127 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:39,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:39,128 INFO L82 PathProgramCache]: Analyzing trace with hash -439607888, now seen corresponding path program 153 times [2021-05-03 14:08:39,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:39,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922098087] [2021-05-03 14:08:39,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:39,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922098087] [2021-05-03 14:08:39,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854341659] [2021-05-03 14:08:39,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:08:39,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:08:39,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:39,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:39,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:39,298 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:39,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:39,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:08:39,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896896854] [2021-05-03 14:08:39,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:08:39,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:39,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:08:39,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:08:39,299 INFO L87 Difference]: Start difference. First operand 19607 states and 69976 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:39,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:39,570 INFO L93 Difference]: Finished difference Result 21427 states and 75723 transitions. [2021-05-03 14:08:39,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:08:39,570 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:39,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:39,630 INFO L225 Difference]: With dead ends: 21427 [2021-05-03 14:08:39,631 INFO L226 Difference]: Without dead ends: 21427 [2021-05-03 14:08:39,631 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 180.0ms TimeCoverageRelationStatistics Valid=276, Invalid=536, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:08:39,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21427 states. [2021-05-03 14:08:40,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21427 to 19699. [2021-05-03 14:08:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19699 states, 19698 states have (on average 3.572240836633161) internal successors, (70366), 19698 states have internal predecessors, (70366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:40,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19699 states to 19699 states and 70366 transitions. [2021-05-03 14:08:40,129 INFO L78 Accepts]: Start accepts. Automaton has 19699 states and 70366 transitions. Word has length 22 [2021-05-03 14:08:40,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:40,129 INFO L480 AbstractCegarLoop]: Abstraction has 19699 states and 70366 transitions. [2021-05-03 14:08:40,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:40,129 INFO L276 IsEmpty]: Start isEmpty. Operand 19699 states and 70366 transitions. [2021-05-03 14:08:40,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:40,137 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:40,137 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:40,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24571,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:40,358 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:40,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:40,358 INFO L82 PathProgramCache]: Analyzing trace with hash 879529279, now seen corresponding path program 154 times [2021-05-03 14:08:40,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:40,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281788834] [2021-05-03 14:08:40,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:40,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281788834] [2021-05-03 14:08:40,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568938415] [2021-05-03 14:08:40,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:08:40,492 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:08:40,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:40,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:40,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:40,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:40,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:08:40,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484871467] [2021-05-03 14:08:40,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:08:40,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:40,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:08:40,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:08:40,529 INFO L87 Difference]: Start difference. First operand 19699 states and 70366 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:41,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:41,004 INFO L93 Difference]: Finished difference Result 20188 states and 71639 transitions. [2021-05-03 14:08:41,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:08:41,004 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:41,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:41,049 INFO L225 Difference]: With dead ends: 20188 [2021-05-03 14:08:41,050 INFO L226 Difference]: Without dead ends: 20182 [2021-05-03 14:08:41,050 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 190.4ms TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:08:41,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20182 states. [2021-05-03 14:08:41,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20182 to 19713. [2021-05-03 14:08:41,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19713 states, 19712 states have (on average 3.571580762987013) internal successors, (70403), 19712 states have internal predecessors, (70403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:41,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19713 states to 19713 states and 70403 transitions. [2021-05-03 14:08:41,534 INFO L78 Accepts]: Start accepts. Automaton has 19713 states and 70403 transitions. Word has length 22 [2021-05-03 14:08:41,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:41,534 INFO L480 AbstractCegarLoop]: Abstraction has 19713 states and 70403 transitions. [2021-05-03 14:08:41,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:41,534 INFO L276 IsEmpty]: Start isEmpty. Operand 19713 states and 70403 transitions. [2021-05-03 14:08:41,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:41,541 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:41,541 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:41,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24572,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:41,757 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:41,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:41,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1043527050, now seen corresponding path program 155 times [2021-05-03 14:08:41,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:41,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242348690] [2021-05-03 14:08:41,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:41,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:41,887 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:41,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242348690] [2021-05-03 14:08:41,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194038314] [2021-05-03 14:08:41,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:41,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:08:41,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:41,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:41,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:41,969 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:41,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:41,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:08:41,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595591460] [2021-05-03 14:08:41,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:08:41,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:41,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:08:41,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:08:41,970 INFO L87 Difference]: Start difference. First operand 19713 states and 70403 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:42,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:42,350 INFO L93 Difference]: Finished difference Result 20611 states and 72663 transitions. [2021-05-03 14:08:42,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:08:42,351 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:42,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:42,407 INFO L225 Difference]: With dead ends: 20611 [2021-05-03 14:08:42,408 INFO L226 Difference]: Without dead ends: 20611 [2021-05-03 14:08:42,408 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 282.4ms TimeCoverageRelationStatistics Valid=455, Invalid=877, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:08:42,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20611 states. [2021-05-03 14:08:42,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20611 to 19594. [2021-05-03 14:08:42,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19594 states, 19593 states have (on average 3.5719389577910476) internal successors, (69985), 19593 states have internal predecessors, (69985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19594 states to 19594 states and 69985 transitions. [2021-05-03 14:08:42,969 INFO L78 Accepts]: Start accepts. Automaton has 19594 states and 69985 transitions. Word has length 22 [2021-05-03 14:08:42,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:42,969 INFO L480 AbstractCegarLoop]: Abstraction has 19594 states and 69985 transitions. [2021-05-03 14:08:42,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 19594 states and 69985 transitions. [2021-05-03 14:08:42,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:42,977 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:42,977 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:43,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24573,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:43,199 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:43,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:43,199 INFO L82 PathProgramCache]: Analyzing trace with hash 19812039, now seen corresponding path program 156 times [2021-05-03 14:08:43,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:43,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550037282] [2021-05-03 14:08:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:43,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550037282] [2021-05-03 14:08:43,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766337859] [2021-05-03 14:08:43,324 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 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 [2021-05-03 14:08:43,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:08:43,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:43,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:43,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:43,433 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:43,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:43,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:08:43,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527349576] [2021-05-03 14:08:43,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:08:43,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:43,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:08:43,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:08:43,434 INFO L87 Difference]: Start difference. First operand 19594 states and 69985 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:43,637 INFO L93 Difference]: Finished difference Result 19840 states and 70288 transitions. [2021-05-03 14:08:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:08:43,637 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:43,695 INFO L225 Difference]: With dead ends: 19840 [2021-05-03 14:08:43,695 INFO L226 Difference]: Without dead ends: 19840 [2021-05-03 14:08:43,695 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=145, Invalid=197, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:08:43,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19840 states. [2021-05-03 14:08:44,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19840 to 19605. [2021-05-03 14:08:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19605 states, 19604 states have (on average 3.5676902672923894) internal successors, (69941), 19604 states have internal predecessors, (69941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:44,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19605 states to 19605 states and 69941 transitions. [2021-05-03 14:08:44,132 INFO L78 Accepts]: Start accepts. Automaton has 19605 states and 69941 transitions. Word has length 22 [2021-05-03 14:08:44,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:44,132 INFO L480 AbstractCegarLoop]: Abstraction has 19605 states and 69941 transitions. [2021-05-03 14:08:44,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:44,132 INFO L276 IsEmpty]: Start isEmpty. Operand 19605 states and 69941 transitions. [2021-05-03 14:08:44,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:44,140 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:44,140 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:44,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24574,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:44,356 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:44,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:44,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1103102172, now seen corresponding path program 157 times [2021-05-03 14:08:44,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:44,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147834666] [2021-05-03 14:08:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:44,432 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:44,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147834666] [2021-05-03 14:08:44,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951751095] [2021-05-03 14:08:44,432 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:44,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:44,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:44,495 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:44,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:44,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:08:44,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943991663] [2021-05-03 14:08:44,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:08:44,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:44,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:08:44,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:08:44,496 INFO L87 Difference]: Start difference. First operand 19605 states and 69941 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:44,642 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-05-03 14:08:44,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:44,863 INFO L93 Difference]: Finished difference Result 19868 states and 70319 transitions. [2021-05-03 14:08:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:08:44,863 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:44,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:44,910 INFO L225 Difference]: With dead ends: 19868 [2021-05-03 14:08:44,911 INFO L226 Difference]: Without dead ends: 19864 [2021-05-03 14:08:44,911 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 250.7ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:08:44,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19864 states. [2021-05-03 14:08:45,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19864 to 18102. [2021-05-03 14:08:45,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18102 states, 18101 states have (on average 3.551682227501243) internal successors, (64289), 18101 states have internal predecessors, (64289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:45,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18102 states to 18102 states and 64289 transitions. [2021-05-03 14:08:45,284 INFO L78 Accepts]: Start accepts. Automaton has 18102 states and 64289 transitions. Word has length 22 [2021-05-03 14:08:45,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:45,285 INFO L480 AbstractCegarLoop]: Abstraction has 18102 states and 64289 transitions. [2021-05-03 14:08:45,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:45,285 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states and 64289 transitions. [2021-05-03 14:08:45,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:45,291 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:45,291 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:45,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24575 [2021-05-03 14:08:45,512 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:45,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:45,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1759904349, now seen corresponding path program 158 times [2021-05-03 14:08:45,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:45,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296658626] [2021-05-03 14:08:45,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:45,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296658626] [2021-05-03 14:08:45,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053447432] [2021-05-03 14:08:45,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:08:45,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:45,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:45,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:45,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:45,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:45,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:08:45,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719893163] [2021-05-03 14:08:45,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:08:45,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:45,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:08:45,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:08:45,650 INFO L87 Difference]: Start difference. First operand 18102 states and 64289 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:45,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:45,905 INFO L93 Difference]: Finished difference Result 18321 states and 64608 transitions. [2021-05-03 14:08:45,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:08:45,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:45,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:45,948 INFO L225 Difference]: With dead ends: 18321 [2021-05-03 14:08:45,949 INFO L226 Difference]: Without dead ends: 18320 [2021-05-03 14:08:45,949 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:08:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18320 states. [2021-05-03 14:08:46,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18320 to 18102. [2021-05-03 14:08:46,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18102 states, 18101 states have (on average 3.5440583393182696) internal successors, (64151), 18101 states have internal predecessors, (64151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:46,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18102 states to 18102 states and 64151 transitions. [2021-05-03 14:08:46,432 INFO L78 Accepts]: Start accepts. Automaton has 18102 states and 64151 transitions. Word has length 22 [2021-05-03 14:08:46,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:46,432 INFO L480 AbstractCegarLoop]: Abstraction has 18102 states and 64151 transitions. [2021-05-03 14:08:46,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:46,432 INFO L276 IsEmpty]: Start isEmpty. Operand 18102 states and 64151 transitions. [2021-05-03 14:08:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:46,439 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:46,439 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:46,659 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24576 [2021-05-03 14:08:46,660 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:46,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:46,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1612644214, now seen corresponding path program 159 times [2021-05-03 14:08:46,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:46,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80078169] [2021-05-03 14:08:46,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:46,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80078169] [2021-05-03 14:08:46,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408999567] [2021-05-03 14:08:46,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:46,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:08:46,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:46,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:46,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:46,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:46,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:08:46,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341038061] [2021-05-03 14:08:46,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:08:46,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:46,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:08:46,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:08:46,801 INFO L87 Difference]: Start difference. First operand 18102 states and 64151 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:46,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:46,950 INFO L93 Difference]: Finished difference Result 18502 states and 64639 transitions. [2021-05-03 14:08:46,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:08:46,951 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:46,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:46,994 INFO L225 Difference]: With dead ends: 18502 [2021-05-03 14:08:46,994 INFO L226 Difference]: Without dead ends: 18502 [2021-05-03 14:08:46,995 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:08:47,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18502 states. [2021-05-03 14:08:47,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18502 to 18082. [2021-05-03 14:08:47,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18082 states, 18081 states have (on average 3.528565897903877) internal successors, (63800), 18081 states have internal predecessors, (63800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:47,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18082 states to 18082 states and 63800 transitions. [2021-05-03 14:08:47,368 INFO L78 Accepts]: Start accepts. Automaton has 18082 states and 63800 transitions. Word has length 22 [2021-05-03 14:08:47,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:47,368 INFO L480 AbstractCegarLoop]: Abstraction has 18082 states and 63800 transitions. [2021-05-03 14:08:47,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:47,368 INFO L276 IsEmpty]: Start isEmpty. Operand 18082 states and 63800 transitions. [2021-05-03 14:08:47,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:47,374 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:47,374 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:47,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24577 [2021-05-03 14:08:47,596 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:47,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:47,596 INFO L82 PathProgramCache]: Analyzing trace with hash -824449639, now seen corresponding path program 160 times [2021-05-03 14:08:47,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:47,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666317522] [2021-05-03 14:08:47,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:47,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:47,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666317522] [2021-05-03 14:08:47,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451241931] [2021-05-03 14:08:47,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:47,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:08:47,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:47,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:47,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:47,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:47,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:08:47,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055330900] [2021-05-03 14:08:47,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:08:47,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:47,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:08:47,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:08:47,789 INFO L87 Difference]: Start difference. First operand 18082 states and 63800 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:48,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:48,068 INFO L93 Difference]: Finished difference Result 18306 states and 64126 transitions. [2021-05-03 14:08:48,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:08:48,069 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:48,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:48,108 INFO L225 Difference]: With dead ends: 18306 [2021-05-03 14:08:48,108 INFO L226 Difference]: Without dead ends: 18304 [2021-05-03 14:08:48,109 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=272, Invalid=484, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:08:48,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18304 states. [2021-05-03 14:08:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18304 to 18082. [2021-05-03 14:08:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18082 states, 18081 states have (on average 3.5282893645262985) internal successors, (63795), 18081 states have internal predecessors, (63795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:48,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18082 states to 18082 states and 63795 transitions. [2021-05-03 14:08:48,551 INFO L78 Accepts]: Start accepts. Automaton has 18082 states and 63795 transitions. Word has length 22 [2021-05-03 14:08:48,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:48,551 INFO L480 AbstractCegarLoop]: Abstraction has 18082 states and 63795 transitions. [2021-05-03 14:08:48,551 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:48,551 INFO L276 IsEmpty]: Start isEmpty. Operand 18082 states and 63795 transitions. [2021-05-03 14:08:48,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:48,558 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:48,558 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:48,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24578 [2021-05-03 14:08:48,775 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:48,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:48,776 INFO L82 PathProgramCache]: Analyzing trace with hash 953275748, now seen corresponding path program 161 times [2021-05-03 14:08:48,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:48,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382118128] [2021-05-03 14:08:48,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:48,851 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:48,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382118128] [2021-05-03 14:08:48,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993896048] [2021-05-03 14:08:48,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:48,874 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:08:48,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:48,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:48,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:08:48,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:48,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:08:48,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245209135] [2021-05-03 14:08:48,923 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:08:48,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:48,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:08:48,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:08:48,923 INFO L87 Difference]: Start difference. First operand 18082 states and 63795 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:49,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:49,077 INFO L93 Difference]: Finished difference Result 18305 states and 63748 transitions. [2021-05-03 14:08:49,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:08:49,078 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:49,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:49,119 INFO L225 Difference]: With dead ends: 18305 [2021-05-03 14:08:49,119 INFO L226 Difference]: Without dead ends: 18305 [2021-05-03 14:08:49,119 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:08:49,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18305 states. [2021-05-03 14:08:49,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18305 to 17477. [2021-05-03 14:08:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.5275806820782787) internal successors, (61648), 17476 states have internal predecessors, (61648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:49,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 61648 transitions. [2021-05-03 14:08:49,499 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 61648 transitions. Word has length 22 [2021-05-03 14:08:49,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:49,500 INFO L480 AbstractCegarLoop]: Abstraction has 17477 states and 61648 transitions. [2021-05-03 14:08:49,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:49,500 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 61648 transitions. [2021-05-03 14:08:49,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:49,506 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:49,506 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:49,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24579,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:49,727 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:49,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:49,727 INFO L82 PathProgramCache]: Analyzing trace with hash 664955357, now seen corresponding path program 162 times [2021-05-03 14:08:49,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:49,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342853402] [2021-05-03 14:08:49,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:49,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:49,960 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:49,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342853402] [2021-05-03 14:08:49,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133165682] [2021-05-03 14:08:49,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:08:49,986 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-03 14:08:49,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:49,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:49,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:50,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:50,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:08:50,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456276768] [2021-05-03 14:08:50,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:08:50,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:50,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:08:50,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:08:50,031 INFO L87 Difference]: Start difference. First operand 17477 states and 61648 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:50,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:50,321 INFO L93 Difference]: Finished difference Result 17705 states and 61981 transitions. [2021-05-03 14:08:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:08:50,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:50,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:50,364 INFO L225 Difference]: With dead ends: 17705 [2021-05-03 14:08:50,364 INFO L226 Difference]: Without dead ends: 17702 [2021-05-03 14:08:50,365 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 323.9ms TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:08:50,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17702 states. [2021-05-03 14:08:50,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17702 to 17477. [2021-05-03 14:08:50,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.5272945754177156) internal successors, (61643), 17476 states have internal predecessors, (61643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:50,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 61643 transitions. [2021-05-03 14:08:50,740 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 61643 transitions. Word has length 22 [2021-05-03 14:08:50,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:50,740 INFO L480 AbstractCegarLoop]: Abstraction has 17477 states and 61643 transitions. [2021-05-03 14:08:50,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 61643 transitions. [2021-05-03 14:08:50,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:50,746 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:50,746 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:50,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24580 [2021-05-03 14:08:50,967 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:50,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:50,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1107584054, now seen corresponding path program 163 times [2021-05-03 14:08:50,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:50,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598953711] [2021-05-03 14:08:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:51,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598953711] [2021-05-03 14:08:51,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11053150] [2021-05-03 14:08:51,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:08:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:51,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:51,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:51,128 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:51,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:51,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:08:51,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001709613] [2021-05-03 14:08:51,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:08:51,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:51,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:08:51,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:08:51,129 INFO L87 Difference]: Start difference. First operand 17477 states and 61643 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:51,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:51,317 INFO L93 Difference]: Finished difference Result 18492 states and 64177 transitions. [2021-05-03 14:08:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:08:51,318 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:51,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:51,360 INFO L225 Difference]: With dead ends: 18492 [2021-05-03 14:08:51,360 INFO L226 Difference]: Without dead ends: 18492 [2021-05-03 14:08:51,360 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:08:51,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18492 states. [2021-05-03 14:08:51,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18492 to 17534. [2021-05-03 14:08:51,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17534 states, 17533 states have (on average 3.5194205213026866) internal successors, (61706), 17533 states have internal predecessors, (61706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:51,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17534 states to 17534 states and 61706 transitions. [2021-05-03 14:08:51,848 INFO L78 Accepts]: Start accepts. Automaton has 17534 states and 61706 transitions. Word has length 22 [2021-05-03 14:08:51,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:51,848 INFO L480 AbstractCegarLoop]: Abstraction has 17534 states and 61706 transitions. [2021-05-03 14:08:51,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:51,848 INFO L276 IsEmpty]: Start isEmpty. Operand 17534 states and 61706 transitions. [2021-05-03 14:08:51,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:51,854 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:51,854 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:52,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24581,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:52,075 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:52,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:52,075 INFO L82 PathProgramCache]: Analyzing trace with hash -408130023, now seen corresponding path program 164 times [2021-05-03 14:08:52,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:52,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041246889] [2021-05-03 14:08:52,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:52,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041246889] [2021-05-03 14:08:52,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536900911] [2021-05-03 14:08:52,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:52,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:52,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:52,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:52,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:52,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:52,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:08:52,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751535613] [2021-05-03 14:08:52,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:08:52,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:52,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:08:52,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:08:52,226 INFO L87 Difference]: Start difference. First operand 17534 states and 61706 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:52,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:52,517 INFO L93 Difference]: Finished difference Result 18165 states and 63327 transitions. [2021-05-03 14:08:52,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:08:52,518 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:52,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:52,562 INFO L225 Difference]: With dead ends: 18165 [2021-05-03 14:08:52,562 INFO L226 Difference]: Without dead ends: 18161 [2021-05-03 14:08:52,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 188.2ms TimeCoverageRelationStatistics Valid=315, Invalid=615, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:08:52,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18161 states. [2021-05-03 14:08:52,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18161 to 17542. [2021-05-03 14:08:52,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17542 states, 17541 states have (on average 3.5194116641012485) internal successors, (61734), 17541 states have internal predecessors, (61734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:52,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17542 states to 17542 states and 61734 transitions. [2021-05-03 14:08:52,946 INFO L78 Accepts]: Start accepts. Automaton has 17542 states and 61734 transitions. Word has length 22 [2021-05-03 14:08:52,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:52,946 INFO L480 AbstractCegarLoop]: Abstraction has 17542 states and 61734 transitions. [2021-05-03 14:08:52,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:52,946 INFO L276 IsEmpty]: Start isEmpty. Operand 17542 states and 61734 transitions. [2021-05-03 14:08:52,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:52,953 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:52,953 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:53,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24582,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:53,158 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:53,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:53,158 INFO L82 PathProgramCache]: Analyzing trace with hash -569728476, now seen corresponding path program 165 times [2021-05-03 14:08:53,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:53,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977314745] [2021-05-03 14:08:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:53,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:53,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977314745] [2021-05-03 14:08:53,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869709011] [2021-05-03 14:08:53,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:53,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:08:53,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:53,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:53,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:53,315 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:53,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:53,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:08:53,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124064122] [2021-05-03 14:08:53,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:08:53,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:53,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:08:53,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:08:53,316 INFO L87 Difference]: Start difference. First operand 17542 states and 61734 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:53,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:53,609 INFO L93 Difference]: Finished difference Result 23520 states and 82630 transitions. [2021-05-03 14:08:53,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:08:53,609 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:53,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:53,674 INFO L225 Difference]: With dead ends: 23520 [2021-05-03 14:08:53,674 INFO L226 Difference]: Without dead ends: 23520 [2021-05-03 14:08:53,675 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 123.3ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:08:53,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23520 states. [2021-05-03 14:08:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23520 to 18797. [2021-05-03 14:08:54,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18797 states, 18796 states have (on average 3.5254309427537773) internal successors, (66264), 18796 states have internal predecessors, (66264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:54,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18797 states to 18797 states and 66264 transitions. [2021-05-03 14:08:54,146 INFO L78 Accepts]: Start accepts. Automaton has 18797 states and 66264 transitions. Word has length 22 [2021-05-03 14:08:54,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:54,146 INFO L480 AbstractCegarLoop]: Abstraction has 18797 states and 66264 transitions. [2021-05-03 14:08:54,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:54,146 INFO L276 IsEmpty]: Start isEmpty. Operand 18797 states and 66264 transitions. [2021-05-03 14:08:54,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:54,152 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:54,153 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:54,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24583,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:54,369 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:54,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:54,369 INFO L82 PathProgramCache]: Analyzing trace with hash 685961565, now seen corresponding path program 166 times [2021-05-03 14:08:54,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:54,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889277513] [2021-05-03 14:08:54,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:54,456 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:54,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889277513] [2021-05-03 14:08:54,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132041557] [2021-05-03 14:08:54,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:08:54,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:08:54,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:54,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:54,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:54,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:54,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:08:54,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844158687] [2021-05-03 14:08:54,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:08:54,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:54,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:08:54,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:08:54,525 INFO L87 Difference]: Start difference. First operand 18797 states and 66264 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:54,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:54,828 INFO L93 Difference]: Finished difference Result 19410 states and 67835 transitions. [2021-05-03 14:08:54,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:08:54,828 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:54,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:54,877 INFO L225 Difference]: With dead ends: 19410 [2021-05-03 14:08:54,877 INFO L226 Difference]: Without dead ends: 19405 [2021-05-03 14:08:54,877 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=310, Invalid=620, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:08:54,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19405 states. [2021-05-03 14:08:55,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19405 to 18800. [2021-05-03 14:08:55,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18800 states, 18799 states have (on average 3.5254534815681686) internal successors, (66275), 18799 states have internal predecessors, (66275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18800 states to 18800 states and 66275 transitions. [2021-05-03 14:08:55,402 INFO L78 Accepts]: Start accepts. Automaton has 18800 states and 66275 transitions. Word has length 22 [2021-05-03 14:08:55,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:55,402 INFO L480 AbstractCegarLoop]: Abstraction has 18800 states and 66275 transitions. [2021-05-03 14:08:55,402 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand 18800 states and 66275 transitions. [2021-05-03 14:08:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:55,409 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:55,410 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:55,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24584,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:55,621 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:55,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:55,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1076074742, now seen corresponding path program 167 times [2021-05-03 14:08:55,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:55,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982696595] [2021-05-03 14:08:55,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:55,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982696595] [2021-05-03 14:08:55,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842327969] [2021-05-03 14:08:55,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:55,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:08:55,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:55,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:55,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:55,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:55,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:08:55,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828567032] [2021-05-03 14:08:55,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:08:55,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:55,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:08:55,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:08:55,786 INFO L87 Difference]: Start difference. First operand 18800 states and 66275 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:56,010 INFO L93 Difference]: Finished difference Result 20745 states and 72560 transitions. [2021-05-03 14:08:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:08:56,011 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:56,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:56,058 INFO L225 Difference]: With dead ends: 20745 [2021-05-03 14:08:56,058 INFO L226 Difference]: Without dead ends: 20745 [2021-05-03 14:08:56,058 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 145.0ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:08:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20745 states. [2021-05-03 14:08:56,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20745 to 19637. [2021-05-03 14:08:56,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19637 states, 19636 states have (on average 3.5308616826237524) internal successors, (69332), 19636 states have internal predecessors, (69332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19637 states to 19637 states and 69332 transitions. [2021-05-03 14:08:56,515 INFO L78 Accepts]: Start accepts. Automaton has 19637 states and 69332 transitions. Word has length 22 [2021-05-03 14:08:56,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:56,515 INFO L480 AbstractCegarLoop]: Abstraction has 19637 states and 69332 transitions. [2021-05-03 14:08:56,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:56,515 INFO L276 IsEmpty]: Start isEmpty. Operand 19637 states and 69332 transitions. [2021-05-03 14:08:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:56,522 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:56,522 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:56,722 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24585,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:56,722 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:56,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:56,722 INFO L82 PathProgramCache]: Analyzing trace with hash 243062425, now seen corresponding path program 168 times [2021-05-03 14:08:56,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:56,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899036653] [2021-05-03 14:08:56,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:56,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899036653] [2021-05-03 14:08:56,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752433146] [2021-05-03 14:08:56,816 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:08:56,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:08:56,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:56,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:56,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:56,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:56,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:08:56,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369392958] [2021-05-03 14:08:56,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:08:56,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:56,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:08:56,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:08:56,884 INFO L87 Difference]: Start difference. First operand 19637 states and 69332 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:57,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:57,242 INFO L93 Difference]: Finished difference Result 20239 states and 70880 transitions. [2021-05-03 14:08:57,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:08:57,243 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:57,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:57,296 INFO L225 Difference]: With dead ends: 20239 [2021-05-03 14:08:57,297 INFO L226 Difference]: Without dead ends: 20233 [2021-05-03 14:08:57,297 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:08:57,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20233 states. [2021-05-03 14:08:57,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20233 to 19639. [2021-05-03 14:08:57,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19639 states, 19638 states have (on average 3.530858539566147) internal successors, (69339), 19638 states have internal predecessors, (69339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19639 states to 19639 states and 69339 transitions. [2021-05-03 14:08:57,729 INFO L78 Accepts]: Start accepts. Automaton has 19639 states and 69339 transitions. Word has length 22 [2021-05-03 14:08:57,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:57,729 INFO L480 AbstractCegarLoop]: Abstraction has 19639 states and 69339 transitions. [2021-05-03 14:08:57,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 19639 states and 69339 transitions. [2021-05-03 14:08:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:57,736 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:57,736 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:57,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24586 [2021-05-03 14:08:57,957 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:57,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:57,958 INFO L82 PathProgramCache]: Analyzing trace with hash 407060196, now seen corresponding path program 169 times [2021-05-03 14:08:57,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:57,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510533911] [2021-05-03 14:08:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:57,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:58,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510533911] [2021-05-03 14:08:58,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470809680] [2021-05-03 14:08:58,046 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 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 [2021-05-03 14:08:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:58,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:58,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:58,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:58,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:08:58,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471831371] [2021-05-03 14:08:58,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:08:58,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:58,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:08:58,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:08:58,120 INFO L87 Difference]: Start difference. First operand 19639 states and 69339 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:58,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:58,446 INFO L93 Difference]: Finished difference Result 20573 states and 71871 transitions. [2021-05-03 14:08:58,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:08:58,446 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:58,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:58,502 INFO L225 Difference]: With dead ends: 20573 [2021-05-03 14:08:58,503 INFO L226 Difference]: Without dead ends: 20573 [2021-05-03 14:08:58,503 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:08:58,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20573 states. [2021-05-03 14:08:58,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20573 to 19777. [2021-05-03 14:08:58,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19777 states, 19776 states have (on average 3.531806229773463) internal successors, (69845), 19776 states have internal predecessors, (69845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19777 states to 19777 states and 69845 transitions. [2021-05-03 14:08:59,116 INFO L78 Accepts]: Start accepts. Automaton has 19777 states and 69845 transitions. Word has length 22 [2021-05-03 14:08:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:08:59,116 INFO L480 AbstractCegarLoop]: Abstraction has 19777 states and 69845 transitions. [2021-05-03 14:08:59,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 19777 states and 69845 transitions. [2021-05-03 14:08:59,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:08:59,122 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:08:59,122 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:08:59,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24587 [2021-05-03 14:08:59,323 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:08:59,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:08:59,323 INFO L82 PathProgramCache]: Analyzing trace with hash -601909027, now seen corresponding path program 170 times [2021-05-03 14:08:59,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:08:59,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207847962] [2021-05-03 14:08:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:08:59,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:08:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:59,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207847962] [2021-05-03 14:08:59,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217089969] [2021-05-03 14:08:59,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:08:59,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:08:59,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:08:59,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:08:59,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:08:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:08:59,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:08:59,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:08:59,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680034322] [2021-05-03 14:08:59,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:08:59,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:08:59,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:08:59,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:08:59,491 INFO L87 Difference]: Start difference. First operand 19777 states and 69845 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:08:59,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:08:59,819 INFO L93 Difference]: Finished difference Result 20348 states and 71343 transitions. [2021-05-03 14:08:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:08:59,819 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:08:59,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:08:59,865 INFO L225 Difference]: With dead ends: 20348 [2021-05-03 14:08:59,866 INFO L226 Difference]: Without dead ends: 20341 [2021-05-03 14:08:59,866 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 210.9ms TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:08:59,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20341 states. [2021-05-03 14:09:00,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20341 to 19792. [2021-05-03 14:09:00,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19792 states, 19791 states have (on average 3.5310494669294124) internal successors, (69883), 19791 states have internal predecessors, (69883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:00,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19792 states to 19792 states and 69883 transitions. [2021-05-03 14:09:00,339 INFO L78 Accepts]: Start accepts. Automaton has 19792 states and 69883 transitions. Word has length 22 [2021-05-03 14:09:00,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:00,339 INFO L480 AbstractCegarLoop]: Abstraction has 19792 states and 69883 transitions. [2021-05-03 14:09:00,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:00,340 INFO L276 IsEmpty]: Start isEmpty. Operand 19792 states and 69883 transitions. [2021-05-03 14:09:00,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:00,347 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:00,347 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:00,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24588 [2021-05-03 14:09:00,569 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:00,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:00,569 INFO L82 PathProgramCache]: Analyzing trace with hash -860396982, now seen corresponding path program 171 times [2021-05-03 14:09:00,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:00,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350729281] [2021-05-03 14:09:00,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:00,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350729281] [2021-05-03 14:09:00,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498130350] [2021-05-03 14:09:00,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:00,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:09:00,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:00,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:00,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:00,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:00,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:00,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522197720] [2021-05-03 14:09:00,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:00,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:00,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:00,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:00,782 INFO L87 Difference]: Start difference. First operand 19792 states and 69883 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:01,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:01,489 INFO L93 Difference]: Finished difference Result 21105 states and 73563 transitions. [2021-05-03 14:09:01,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 14:09:01,490 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:01,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:01,548 INFO L225 Difference]: With dead ends: 21105 [2021-05-03 14:09:01,548 INFO L226 Difference]: Without dead ends: 21105 [2021-05-03 14:09:01,548 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 564.5ms TimeCoverageRelationStatistics Valid=644, Invalid=1248, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 14:09:01,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21105 states. [2021-05-03 14:09:01,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21105 to 20568. [2021-05-03 14:09:01,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20568 states, 20567 states have (on average 3.529051393008217) internal successors, (72582), 20567 states have internal predecessors, (72582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:01,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20568 states to 20568 states and 72582 transitions. [2021-05-03 14:09:01,991 INFO L78 Accepts]: Start accepts. Automaton has 20568 states and 72582 transitions. Word has length 22 [2021-05-03 14:09:01,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:01,991 INFO L480 AbstractCegarLoop]: Abstraction has 20568 states and 72582 transitions. [2021-05-03 14:09:01,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:01,991 INFO L276 IsEmpty]: Start isEmpty. Operand 20568 states and 72582 transitions. [2021-05-03 14:09:01,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:01,999 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:01,999 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:02,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24589 [2021-05-03 14:09:02,220 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:02,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:02,220 INFO L82 PathProgramCache]: Analyzing trace with hash 860487385, now seen corresponding path program 172 times [2021-05-03 14:09:02,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:02,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600854616] [2021-05-03 14:09:02,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:02,289 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:09:02,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600854616] [2021-05-03 14:09:02,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425569927] [2021-05-03 14:09:02,290 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:02,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:02,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:02,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:02,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 43 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:09:02,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:02,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:09:02,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074560175] [2021-05-03 14:09:02,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:09:02,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:02,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:09:02,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:02,405 INFO L87 Difference]: Start difference. First operand 20568 states and 72582 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:02,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:02,629 INFO L93 Difference]: Finished difference Result 20897 states and 73323 transitions. [2021-05-03 14:09:02,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:09:02,629 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:02,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:02,679 INFO L225 Difference]: With dead ends: 20897 [2021-05-03 14:09:02,679 INFO L226 Difference]: Without dead ends: 20897 [2021-05-03 14:09:02,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:02,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20897 states. [2021-05-03 14:09:03,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20897 to 20632. [2021-05-03 14:09:03,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20632 states, 20631 states have (on average 3.527991856914352) internal successors, (72786), 20631 states have internal predecessors, (72786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:03,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20632 states to 20632 states and 72786 transitions. [2021-05-03 14:09:03,206 INFO L78 Accepts]: Start accepts. Automaton has 20632 states and 72786 transitions. Word has length 22 [2021-05-03 14:09:03,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:03,206 INFO L480 AbstractCegarLoop]: Abstraction has 20632 states and 72786 transitions. [2021-05-03 14:09:03,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:03,206 INFO L276 IsEmpty]: Start isEmpty. Operand 20632 states and 72786 transitions. [2021-05-03 14:09:03,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:03,213 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:03,213 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:03,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24590,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:03,434 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:03,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:03,434 INFO L82 PathProgramCache]: Analyzing trace with hash 82743140, now seen corresponding path program 173 times [2021-05-03 14:09:03,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:03,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970410162] [2021-05-03 14:09:03,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:09:03,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970410162] [2021-05-03 14:09:03,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953651083] [2021-05-03 14:09:03,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:03,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:09:03,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:03,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:03,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:09:03,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:03,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:09:03,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192580837] [2021-05-03 14:09:03,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:09:03,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:03,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:09:03,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:09:03,559 INFO L87 Difference]: Start difference. First operand 20632 states and 72786 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:03,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:03,879 INFO L93 Difference]: Finished difference Result 25212 states and 88754 transitions. [2021-05-03 14:09:03,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:09:03,880 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:03,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:03,945 INFO L225 Difference]: With dead ends: 25212 [2021-05-03 14:09:03,945 INFO L226 Difference]: Without dead ends: 25208 [2021-05-03 14:09:03,946 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:09:03,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25208 states. [2021-05-03 14:09:04,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25208 to 23517. [2021-05-03 14:09:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23517 states, 23516 states have (on average 3.5353376424562) internal successors, (83137), 23516 states have internal predecessors, (83137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:04,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23517 states to 23517 states and 83137 transitions. [2021-05-03 14:09:04,723 INFO L78 Accepts]: Start accepts. Automaton has 23517 states and 83137 transitions. Word has length 22 [2021-05-03 14:09:04,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:04,723 INFO L480 AbstractCegarLoop]: Abstraction has 23517 states and 83137 transitions. [2021-05-03 14:09:04,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:04,723 INFO L276 IsEmpty]: Start isEmpty. Operand 23517 states and 83137 transitions. [2021-05-03 14:09:04,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:04,731 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:04,731 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:04,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24591 [2021-05-03 14:09:04,949 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:04,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:04,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1746631591, now seen corresponding path program 174 times [2021-05-03 14:09:04,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:04,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180702864] [2021-05-03 14:09:04,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:05,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180702864] [2021-05-03 14:09:05,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687288136] [2021-05-03 14:09:05,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:05,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:09:05,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:05,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:05,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:09:05,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:05,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:09:05,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404803394] [2021-05-03 14:09:05,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:05,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:05,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:05,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:05,085 INFO L87 Difference]: Start difference. First operand 23517 states and 83137 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:05,388 INFO L93 Difference]: Finished difference Result 23865 states and 84038 transitions. [2021-05-03 14:09:05,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:09:05,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:05,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:05,456 INFO L225 Difference]: With dead ends: 23865 [2021-05-03 14:09:05,456 INFO L226 Difference]: Without dead ends: 23861 [2021-05-03 14:09:05,456 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:05,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23861 states. [2021-05-03 14:09:05,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23861 to 23517. [2021-05-03 14:09:05,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23517 states, 23516 states have (on average 3.535252593978568) internal successors, (83135), 23516 states have internal predecessors, (83135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:05,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23517 states to 23517 states and 83135 transitions. [2021-05-03 14:09:05,989 INFO L78 Accepts]: Start accepts. Automaton has 23517 states and 83135 transitions. Word has length 22 [2021-05-03 14:09:05,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:05,989 INFO L480 AbstractCegarLoop]: Abstraction has 23517 states and 83135 transitions. [2021-05-03 14:09:05,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:05,990 INFO L276 IsEmpty]: Start isEmpty. Operand 23517 states and 83135 transitions. [2021-05-03 14:09:05,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:05,997 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:05,997 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:06,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24592 [2021-05-03 14:09:06,219 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:06,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:06,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1908230044, now seen corresponding path program 175 times [2021-05-03 14:09:06,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:06,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319915458] [2021-05-03 14:09:06,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:06,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319915458] [2021-05-03 14:09:06,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743188197] [2021-05-03 14:09:06,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:06,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:06,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:06,365 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:09:06,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:06,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:09:06,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583442144] [2021-05-03 14:09:06,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:06,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:06,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:06,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:06,366 INFO L87 Difference]: Start difference. First operand 23517 states and 83135 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:06,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:06,854 INFO L93 Difference]: Finished difference Result 26766 states and 93606 transitions. [2021-05-03 14:09:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:09:06,858 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:06,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:06,921 INFO L225 Difference]: With dead ends: 26766 [2021-05-03 14:09:06,921 INFO L226 Difference]: Without dead ends: 26766 [2021-05-03 14:09:06,921 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:06,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26766 states. [2021-05-03 14:09:07,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26766 to 26009. [2021-05-03 14:09:07,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26009 states, 26008 states have (on average 3.535912027068594) internal successors, (91962), 26008 states have internal predecessors, (91962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:07,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26009 states to 26009 states and 91962 transitions. [2021-05-03 14:09:07,440 INFO L78 Accepts]: Start accepts. Automaton has 26009 states and 91962 transitions. Word has length 22 [2021-05-03 14:09:07,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:07,440 INFO L480 AbstractCegarLoop]: Abstraction has 26009 states and 91962 transitions. [2021-05-03 14:09:07,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:07,440 INFO L276 IsEmpty]: Start isEmpty. Operand 26009 states and 91962 transitions. [2021-05-03 14:09:07,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:07,448 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:07,448 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:07,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24593,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:07,665 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:07,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:07,665 INFO L82 PathProgramCache]: Analyzing trace with hash -263496653, now seen corresponding path program 176 times [2021-05-03 14:09:07,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:07,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581577740] [2021-05-03 14:09:07,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:07,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581577740] [2021-05-03 14:09:07,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858106832] [2021-05-03 14:09:07,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:09:08,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:08,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:08,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:08,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:08,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:08,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:09:08,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235817818] [2021-05-03 14:09:08,060 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:08,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:08,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:08,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:08,061 INFO L87 Difference]: Start difference. First operand 26009 states and 91962 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:08,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:08,353 INFO L93 Difference]: Finished difference Result 26395 states and 92871 transitions. [2021-05-03 14:09:08,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:09:08,353 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:08,437 INFO L225 Difference]: With dead ends: 26395 [2021-05-03 14:09:08,437 INFO L226 Difference]: Without dead ends: 26391 [2021-05-03 14:09:08,437 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 314.8ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:09:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26391 states. [2021-05-03 14:09:09,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26391 to 26009. [2021-05-03 14:09:09,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26009 states, 26008 states have (on average 3.5357582282374653) internal successors, (91958), 26008 states have internal predecessors, (91958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26009 states to 26009 states and 91958 transitions. [2021-05-03 14:09:09,182 INFO L78 Accepts]: Start accepts. Automaton has 26009 states and 91958 transitions. Word has length 22 [2021-05-03 14:09:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:09,182 INFO L480 AbstractCegarLoop]: Abstraction has 26009 states and 91958 transitions. [2021-05-03 14:09:09,182 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:09,183 INFO L276 IsEmpty]: Start isEmpty. Operand 26009 states and 91958 transitions. [2021-05-03 14:09:09,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:09,190 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:09,190 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:09,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24594,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:09,405 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:09,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:09,406 INFO L82 PathProgramCache]: Analyzing trace with hash -425095106, now seen corresponding path program 177 times [2021-05-03 14:09:09,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:09,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433830211] [2021-05-03 14:09:09,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:09,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433830211] [2021-05-03 14:09:09,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819866688] [2021-05-03 14:09:09,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:09,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:09:09,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:09,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:09,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:09,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:09,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:09:09,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147979075] [2021-05-03 14:09:09,560 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:09,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:09,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:09,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:09,560 INFO L87 Difference]: Start difference. First operand 26009 states and 91958 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:09,837 INFO L93 Difference]: Finished difference Result 28931 states and 100786 transitions. [2021-05-03 14:09:09,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:09:09,838 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:09,912 INFO L225 Difference]: With dead ends: 28931 [2021-05-03 14:09:09,912 INFO L226 Difference]: Without dead ends: 28931 [2021-05-03 14:09:09,913 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:09:09,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28931 states. [2021-05-03 14:09:10,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28931 to 25132. [2021-05-03 14:09:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25132 states, 25131 states have (on average 3.5305399705542957) internal successors, (88726), 25131 states have internal predecessors, (88726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:10,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25132 states to 25132 states and 88726 transitions. [2021-05-03 14:09:10,766 INFO L78 Accepts]: Start accepts. Automaton has 25132 states and 88726 transitions. Word has length 22 [2021-05-03 14:09:10,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:10,766 INFO L480 AbstractCegarLoop]: Abstraction has 25132 states and 88726 transitions. [2021-05-03 14:09:10,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:10,766 INFO L276 IsEmpty]: Start isEmpty. Operand 25132 states and 88726 transitions. [2021-05-03 14:09:10,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:10,774 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:10,774 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:10,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24595,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:10,987 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:10,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:10,987 INFO L82 PathProgramCache]: Analyzing trace with hash 830594935, now seen corresponding path program 178 times [2021-05-03 14:09:10,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:10,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261823771] [2021-05-03 14:09:10,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:11,064 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:11,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261823771] [2021-05-03 14:09:11,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214172906] [2021-05-03 14:09:11,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:11,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:11,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:11,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:11,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:11,130 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:11,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:11,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:09:11,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037255665] [2021-05-03 14:09:11,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:11,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:11,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:11,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:11,131 INFO L87 Difference]: Start difference. First operand 25132 states and 88726 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:11,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:11,454 INFO L93 Difference]: Finished difference Result 25641 states and 90061 transitions. [2021-05-03 14:09:11,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:09:11,455 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:11,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:11,521 INFO L225 Difference]: With dead ends: 25641 [2021-05-03 14:09:11,521 INFO L226 Difference]: Without dead ends: 25636 [2021-05-03 14:09:11,521 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 174.0ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:09:11,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25636 states. [2021-05-03 14:09:12,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25636 to 25153. [2021-05-03 14:09:12,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25153 states, 25152 states have (on average 3.530017493638677) internal successors, (88787), 25152 states have internal predecessors, (88787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:12,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25153 states to 25153 states and 88787 transitions. [2021-05-03 14:09:12,280 INFO L78 Accepts]: Start accepts. Automaton has 25153 states and 88787 transitions. Word has length 22 [2021-05-03 14:09:12,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:12,280 INFO L480 AbstractCegarLoop]: Abstraction has 25153 states and 88787 transitions. [2021-05-03 14:09:12,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:12,280 INFO L276 IsEmpty]: Start isEmpty. Operand 25153 states and 88787 transitions. [2021-05-03 14:09:12,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:12,287 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:12,287 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:12,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24596,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:12,497 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:12,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:12,497 INFO L82 PathProgramCache]: Analyzing trace with hash -931441372, now seen corresponding path program 179 times [2021-05-03 14:09:12,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:12,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178853327] [2021-05-03 14:09:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:12,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178853327] [2021-05-03 14:09:12,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015422290] [2021-05-03 14:09:12,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:09:12,593 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:09:12,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:12,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:12,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:12,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:12,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:09:12,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491629850] [2021-05-03 14:09:12,662 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:12,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:12,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:12,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:12,662 INFO L87 Difference]: Start difference. First operand 25153 states and 88787 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:13,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:13,002 INFO L93 Difference]: Finished difference Result 28403 states and 99337 transitions. [2021-05-03 14:09:13,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:09:13,002 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:13,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:13,077 INFO L225 Difference]: With dead ends: 28403 [2021-05-03 14:09:13,077 INFO L226 Difference]: Without dead ends: 28403 [2021-05-03 14:09:13,077 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 192.2ms TimeCoverageRelationStatistics Valid=302, Invalid=568, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:09:13,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28403 states. [2021-05-03 14:09:13,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28403 to 27756. [2021-05-03 14:09:13,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27756 states, 27755 states have (on average 3.5323365159430735) internal successors, (98040), 27755 states have internal predecessors, (98040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:14,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27756 states to 27756 states and 98040 transitions. [2021-05-03 14:09:14,031 INFO L78 Accepts]: Start accepts. Automaton has 27756 states and 98040 transitions. Word has length 22 [2021-05-03 14:09:14,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:14,031 INFO L480 AbstractCegarLoop]: Abstraction has 27756 states and 98040 transitions. [2021-05-03 14:09:14,031 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:14,031 INFO L276 IsEmpty]: Start isEmpty. Operand 27756 states and 98040 transitions. [2021-05-03 14:09:14,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:14,041 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:14,041 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:14,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24597 [2021-05-03 14:09:14,257 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:14,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:14,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1530953831, now seen corresponding path program 180 times [2021-05-03 14:09:14,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:14,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986552271] [2021-05-03 14:09:14,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:14,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:14,341 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:14,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986552271] [2021-05-03 14:09:14,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741235415] [2021-05-03 14:09:14,342 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:14,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:09:14,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:14,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:14,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:14,410 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 22 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:14,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:14,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:09:14,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48378016] [2021-05-03 14:09:14,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:09:14,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:14,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:09:14,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:09:14,411 INFO L87 Difference]: Start difference. First operand 27756 states and 98040 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:14,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:14,740 INFO L93 Difference]: Finished difference Result 28254 states and 99257 transitions. [2021-05-03 14:09:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:09:14,741 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:14,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:14,831 INFO L225 Difference]: With dead ends: 28254 [2021-05-03 14:09:14,831 INFO L226 Difference]: Without dead ends: 28250 [2021-05-03 14:09:14,832 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:09:14,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28250 states. [2021-05-03 14:09:15,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28250 to 27756. [2021-05-03 14:09:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27756 states, 27755 states have (on average 3.5321203386777156) internal successors, (98034), 27755 states have internal predecessors, (98034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:15,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27756 states to 27756 states and 98034 transitions. [2021-05-03 14:09:15,903 INFO L78 Accepts]: Start accepts. Automaton has 27756 states and 98034 transitions. Word has length 22 [2021-05-03 14:09:15,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:15,903 INFO L480 AbstractCegarLoop]: Abstraction has 27756 states and 98034 transitions. [2021-05-03 14:09:15,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:15,904 INFO L276 IsEmpty]: Start isEmpty. Operand 27756 states and 98034 transitions. [2021-05-03 14:09:15,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:15,913 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:15,913 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:16,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24598,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:16,154 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:16,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:16,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1692552284, now seen corresponding path program 181 times [2021-05-03 14:09:16,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:16,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912173226] [2021-05-03 14:09:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:16,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912173226] [2021-05-03 14:09:16,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245528188] [2021-05-03 14:09:16,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:09:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:16,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:16,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:16,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:16,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:09:16,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842209105] [2021-05-03 14:09:16,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:09:16,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:16,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:09:16,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:09:16,299 INFO L87 Difference]: Start difference. First operand 27756 states and 98034 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:16,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:16,608 INFO L93 Difference]: Finished difference Result 30857 states and 107254 transitions. [2021-05-03 14:09:16,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:09:16,609 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:16,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:16,692 INFO L225 Difference]: With dead ends: 30857 [2021-05-03 14:09:16,693 INFO L226 Difference]: Without dead ends: 30857 [2021-05-03 14:09:16,693 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=235, Invalid=415, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:09:16,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30857 states. [2021-05-03 14:09:17,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30857 to 22798. [2021-05-03 14:09:17,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22798 states, 22797 states have (on average 3.5037943589068736) internal successors, (79876), 22797 states have internal predecessors, (79876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22798 states to 22798 states and 79876 transitions. [2021-05-03 14:09:17,283 INFO L78 Accepts]: Start accepts. Automaton has 22798 states and 79876 transitions. Word has length 22 [2021-05-03 14:09:17,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:17,283 INFO L480 AbstractCegarLoop]: Abstraction has 22798 states and 79876 transitions. [2021-05-03 14:09:17,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:17,283 INFO L276 IsEmpty]: Start isEmpty. Operand 22798 states and 79876 transitions. [2021-05-03 14:09:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:17,291 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:17,291 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:17,504 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24599 [2021-05-03 14:09:17,505 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:17,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:17,505 INFO L82 PathProgramCache]: Analyzing trace with hash -436862243, now seen corresponding path program 182 times [2021-05-03 14:09:17,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:17,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201832312] [2021-05-03 14:09:17,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:17,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201832312] [2021-05-03 14:09:17,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840486402] [2021-05-03 14:09:17,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:09:17,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:17,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:17,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:17,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:17,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:17,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:09:17,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013968171] [2021-05-03 14:09:17,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:09:17,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:17,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:09:17,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:09:17,650 INFO L87 Difference]: Start difference. First operand 22798 states and 79876 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:18,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:18,235 INFO L93 Difference]: Finished difference Result 23497 states and 81715 transitions. [2021-05-03 14:09:18,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:09:18,235 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:18,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:18,299 INFO L225 Difference]: With dead ends: 23497 [2021-05-03 14:09:18,299 INFO L226 Difference]: Without dead ends: 23492 [2021-05-03 14:09:18,299 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:09:18,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23492 states. [2021-05-03 14:09:18,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23492 to 22804. [2021-05-03 14:09:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22804 states, 22803 states have (on average 3.5038810682804895) internal successors, (79899), 22803 states have internal predecessors, (79899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:18,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22804 states to 22804 states and 79899 transitions. [2021-05-03 14:09:18,866 INFO L78 Accepts]: Start accepts. Automaton has 22804 states and 79899 transitions. Word has length 22 [2021-05-03 14:09:18,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:18,866 INFO L480 AbstractCegarLoop]: Abstraction has 22804 states and 79899 transitions. [2021-05-03 14:09:18,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:18,866 INFO L276 IsEmpty]: Start isEmpty. Operand 22804 states and 79899 transitions. [2021-05-03 14:09:18,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:18,873 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:18,873 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:19,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24600 [2021-05-03 14:09:19,087 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:19,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:19,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2096068746, now seen corresponding path program 183 times [2021-05-03 14:09:19,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:19,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129284717] [2021-05-03 14:09:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:19,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129284717] [2021-05-03 14:09:19,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846007454] [2021-05-03 14:09:19,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:09:19,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:09:19,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:19,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:19,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:19,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:19,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:09:19,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574140091] [2021-05-03 14:09:19,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:09:19,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:19,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:09:19,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:09:19,236 INFO L87 Difference]: Start difference. First operand 22804 states and 79899 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:19,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:19,548 INFO L93 Difference]: Finished difference Result 26246 states and 91100 transitions. [2021-05-03 14:09:19,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:09:19,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:19,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:19,610 INFO L225 Difference]: With dead ends: 26246 [2021-05-03 14:09:19,610 INFO L226 Difference]: Without dead ends: 26246 [2021-05-03 14:09:19,610 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=275, Invalid=537, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:09:19,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26246 states. [2021-05-03 14:09:20,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26246 to 22958. [2021-05-03 14:09:20,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22958 states, 22957 states have (on average 3.504072831816004) internal successors, (80443), 22957 states have internal predecessors, (80443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22958 states to 22958 states and 80443 transitions. [2021-05-03 14:09:20,237 INFO L78 Accepts]: Start accepts. Automaton has 22958 states and 80443 transitions. Word has length 22 [2021-05-03 14:09:20,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:20,237 INFO L480 AbstractCegarLoop]: Abstraction has 22958 states and 80443 transitions. [2021-05-03 14:09:20,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:20,238 INFO L276 IsEmpty]: Start isEmpty. Operand 22958 states and 80443 transitions. [2021-05-03 14:09:20,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:20,244 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:20,244 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:20,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24601 [2021-05-03 14:09:20,444 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:20,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:20,445 INFO L82 PathProgramCache]: Analyzing trace with hash -879761383, now seen corresponding path program 184 times [2021-05-03 14:09:20,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:20,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219931216] [2021-05-03 14:09:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:20,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219931216] [2021-05-03 14:09:20,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967244393] [2021-05-03 14:09:20,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:09:20,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:20,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:20,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:20,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:20,592 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:20,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:20,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:09:20,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901894768] [2021-05-03 14:09:20,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:09:20,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:20,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:09:20,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:09:20,593 INFO L87 Difference]: Start difference. First operand 22958 states and 80443 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:20,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:20,874 INFO L93 Difference]: Finished difference Result 23615 states and 82201 transitions. [2021-05-03 14:09:20,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:09:20,875 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:20,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:20,922 INFO L225 Difference]: With dead ends: 23615 [2021-05-03 14:09:20,922 INFO L226 Difference]: Without dead ends: 23609 [2021-05-03 14:09:20,922 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:09:20,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23609 states. [2021-05-03 14:09:21,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23609 to 22976. [2021-05-03 14:09:21,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22976 states, 22975 states have (on average 3.503808487486398) internal successors, (80500), 22975 states have internal predecessors, (80500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:21,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22976 states to 22976 states and 80500 transitions. [2021-05-03 14:09:21,455 INFO L78 Accepts]: Start accepts. Automaton has 22976 states and 80500 transitions. Word has length 22 [2021-05-03 14:09:21,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:21,455 INFO L480 AbstractCegarLoop]: Abstraction has 22976 states and 80500 transitions. [2021-05-03 14:09:21,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:21,455 INFO L276 IsEmpty]: Start isEmpty. Operand 22976 states and 80500 transitions. [2021-05-03 14:09:21,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:21,461 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:21,461 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:21,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24602,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:21,662 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:21,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:21,662 INFO L82 PathProgramCache]: Analyzing trace with hash -715763612, now seen corresponding path program 185 times [2021-05-03 14:09:21,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:21,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795329223] [2021-05-03 14:09:21,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:21,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795329223] [2021-05-03 14:09:21,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548932788] [2021-05-03 14:09:21,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:21,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:09:21,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:21,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:21,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:21,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:21,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:09:21,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792792564] [2021-05-03 14:09:21,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:09:21,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:21,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:09:21,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:09:21,840 INFO L87 Difference]: Start difference. First operand 22976 states and 80500 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:22,206 INFO L93 Difference]: Finished difference Result 24953 states and 86530 transitions. [2021-05-03 14:09:22,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:09:22,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:22,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:22,251 INFO L225 Difference]: With dead ends: 24953 [2021-05-03 14:09:22,251 INFO L226 Difference]: Without dead ends: 24953 [2021-05-03 14:09:22,251 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 277.9ms TimeCoverageRelationStatistics Valid=454, Invalid=878, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:09:22,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24953 states. [2021-05-03 14:09:22,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24953 to 24405. [2021-05-03 14:09:22,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 24404 states have (on average 3.5054499262416) internal successors, (85547), 24404 states have internal predecessors, (85547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:22,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 85547 transitions. [2021-05-03 14:09:22,872 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 85547 transitions. Word has length 22 [2021-05-03 14:09:22,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:22,872 INFO L480 AbstractCegarLoop]: Abstraction has 24405 states and 85547 transitions. [2021-05-03 14:09:22,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:22,873 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 85547 transitions. [2021-05-03 14:09:22,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:22,879 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:22,879 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:23,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24603,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:23,080 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:23,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:23,080 INFO L82 PathProgramCache]: Analyzing trace with hash 2127546611, now seen corresponding path program 186 times [2021-05-03 14:09:23,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:23,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666592760] [2021-05-03 14:09:23,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:23,147 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:23,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666592760] [2021-05-03 14:09:23,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106698165] [2021-05-03 14:09:23,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:23,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:09:23,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:23,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:23,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:23,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:23,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:23,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750772401] [2021-05-03 14:09:23,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:23,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:23,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:23,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:23,212 INFO L87 Difference]: Start difference. First operand 24405 states and 85547 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:23,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:23,500 INFO L93 Difference]: Finished difference Result 24826 states and 86467 transitions. [2021-05-03 14:09:23,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:09:23,501 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:23,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:23,553 INFO L225 Difference]: With dead ends: 24826 [2021-05-03 14:09:23,553 INFO L226 Difference]: Without dead ends: 24822 [2021-05-03 14:09:23,554 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:09:23,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24822 states. [2021-05-03 14:09:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24822 to 24405. [2021-05-03 14:09:23,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24405 states, 24404 states have (on average 3.5052860186854615) internal successors, (85543), 24404 states have internal predecessors, (85543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:23,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24405 states to 24405 states and 85543 transitions. [2021-05-03 14:09:23,994 INFO L78 Accepts]: Start accepts. Automaton has 24405 states and 85543 transitions. Word has length 22 [2021-05-03 14:09:23,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:23,994 INFO L480 AbstractCegarLoop]: Abstraction has 24405 states and 85543 transitions. [2021-05-03 14:09:23,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:23,994 INFO L276 IsEmpty]: Start isEmpty. Operand 24405 states and 85543 transitions. [2021-05-03 14:09:24,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:24,000 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:24,001 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:24,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24604 [2021-05-03 14:09:24,201 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:24,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:24,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1965948158, now seen corresponding path program 187 times [2021-05-03 14:09:24,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:24,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884520044] [2021-05-03 14:09:24,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:24,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884520044] [2021-05-03 14:09:24,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322928680] [2021-05-03 14:09:24,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:24,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:24,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:24,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:24,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:24,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62796992] [2021-05-03 14:09:24,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:24,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:24,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:24,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:24,357 INFO L87 Difference]: Start difference. First operand 24405 states and 85543 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:24,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:24,836 INFO L93 Difference]: Finished difference Result 25900 states and 89533 transitions. [2021-05-03 14:09:24,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:09:24,837 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:24,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:24,887 INFO L225 Difference]: With dead ends: 25900 [2021-05-03 14:09:24,887 INFO L226 Difference]: Without dead ends: 25900 [2021-05-03 14:09:24,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:09:24,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25900 states. [2021-05-03 14:09:25,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25900 to 18287. [2021-05-03 14:09:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18287 states, 18286 states have (on average 3.4808596740675926) internal successors, (63651), 18286 states have internal predecessors, (63651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:25,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18287 states to 18287 states and 63651 transitions. [2021-05-03 14:09:25,328 INFO L78 Accepts]: Start accepts. Automaton has 18287 states and 63651 transitions. Word has length 22 [2021-05-03 14:09:25,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:25,329 INFO L480 AbstractCegarLoop]: Abstraction has 18287 states and 63651 transitions. [2021-05-03 14:09:25,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:25,329 INFO L276 IsEmpty]: Start isEmpty. Operand 18287 states and 63651 transitions. [2021-05-03 14:09:25,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:25,336 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:25,336 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:25,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24605,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:25,559 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:25,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:25,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1073329097, now seen corresponding path program 188 times [2021-05-03 14:09:25,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:25,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682825399] [2021-05-03 14:09:25,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:25,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682825399] [2021-05-03 14:09:25,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618734076] [2021-05-03 14:09:25,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:25,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:25,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:25,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:25,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:25,715 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:25,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:25,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:25,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058919655] [2021-05-03 14:09:25,715 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:25,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:25,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:25,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:25,716 INFO L87 Difference]: Start difference. First operand 18287 states and 63651 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:26,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:26,028 INFO L93 Difference]: Finished difference Result 19111 states and 65822 transitions. [2021-05-03 14:09:26,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:09:26,028 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:26,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:26,064 INFO L225 Difference]: With dead ends: 19111 [2021-05-03 14:09:26,064 INFO L226 Difference]: Without dead ends: 19106 [2021-05-03 14:09:26,064 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=330, Invalid=662, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:09:26,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19106 states. [2021-05-03 14:09:26,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19106 to 18296. [2021-05-03 14:09:26,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18296 states, 18295 states have (on average 3.4810057392730256) internal successors, (63685), 18295 states have internal predecessors, (63685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:26,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18296 states to 18296 states and 63685 transitions. [2021-05-03 14:09:26,553 INFO L78 Accepts]: Start accepts. Automaton has 18296 states and 63685 transitions. Word has length 22 [2021-05-03 14:09:26,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:26,553 INFO L480 AbstractCegarLoop]: Abstraction has 18296 states and 63685 transitions. [2021-05-03 14:09:26,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:26,553 INFO L276 IsEmpty]: Start isEmpty. Operand 18296 states and 63685 transitions. [2021-05-03 14:09:26,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:26,560 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:26,560 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:26,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24606 [2021-05-03 14:09:26,761 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:26,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:26,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1459601892, now seen corresponding path program 189 times [2021-05-03 14:09:26,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:26,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858958046] [2021-05-03 14:09:26,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:26,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858958046] [2021-05-03 14:09:26,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016165081] [2021-05-03 14:09:26,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:26,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:09:26,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:26,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:26,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:26,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:26,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:26,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322078312] [2021-05-03 14:09:26,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:26,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:26,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:26,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:26,899 INFO L87 Difference]: Start difference. First operand 18296 states and 63685 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:27,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:27,106 INFO L93 Difference]: Finished difference Result 22104 states and 76218 transitions. [2021-05-03 14:09:27,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:09:27,106 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:27,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:27,143 INFO L225 Difference]: With dead ends: 22104 [2021-05-03 14:09:27,143 INFO L226 Difference]: Without dead ends: 22104 [2021-05-03 14:09:27,144 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=239, Invalid=463, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:09:27,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22104 states. [2021-05-03 14:09:27,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22104 to 17879. [2021-05-03 14:09:27,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17879 states, 17878 states have (on average 3.4820449714733193) internal successors, (62252), 17878 states have internal predecessors, (62252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17879 states to 17879 states and 62252 transitions. [2021-05-03 14:09:27,482 INFO L78 Accepts]: Start accepts. Automaton has 17879 states and 62252 transitions. Word has length 22 [2021-05-03 14:09:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:27,482 INFO L480 AbstractCegarLoop]: Abstraction has 17879 states and 62252 transitions. [2021-05-03 14:09:27,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 17879 states and 62252 transitions. [2021-05-03 14:09:27,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:27,488 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:27,488 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:27,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24607,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:27,689 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:27,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:27,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1516228237, now seen corresponding path program 190 times [2021-05-03 14:09:27,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:27,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781231545] [2021-05-03 14:09:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:27,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:27,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781231545] [2021-05-03 14:09:27,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292766634] [2021-05-03 14:09:27,763 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:27,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:27,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:27,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:27,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:27,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:27,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:27,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739144877] [2021-05-03 14:09:27,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:27,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:27,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:27,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:27,838 INFO L87 Difference]: Start difference. First operand 17879 states and 62252 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:28,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:28,157 INFO L93 Difference]: Finished difference Result 18689 states and 64378 transitions. [2021-05-03 14:09:28,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:09:28,158 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:28,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:28,192 INFO L225 Difference]: With dead ends: 18689 [2021-05-03 14:09:28,192 INFO L226 Difference]: Without dead ends: 18683 [2021-05-03 14:09:28,192 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:09:28,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18683 states. [2021-05-03 14:09:28,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18683 to 17883. [2021-05-03 14:09:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17883 states, 17882 states have (on average 3.482104909965328) internal successors, (62267), 17882 states have internal predecessors, (62267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:28,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17883 states to 17883 states and 62267 transitions. [2021-05-03 14:09:28,505 INFO L78 Accepts]: Start accepts. Automaton has 17883 states and 62267 transitions. Word has length 22 [2021-05-03 14:09:28,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:28,505 INFO L480 AbstractCegarLoop]: Abstraction has 17883 states and 62267 transitions. [2021-05-03 14:09:28,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:28,505 INFO L276 IsEmpty]: Start isEmpty. Operand 17883 states and 62267 transitions. [2021-05-03 14:09:28,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:28,510 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:28,510 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:28,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24608,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:28,712 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:28,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:28,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1352230466, now seen corresponding path program 191 times [2021-05-03 14:09:28,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:28,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052425317] [2021-05-03 14:09:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:28,781 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:28,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052425317] [2021-05-03 14:09:28,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489747183] [2021-05-03 14:09:28,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:28,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:09:28,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:28,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:28,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:28,856 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:28,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:28,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:28,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087970333] [2021-05-03 14:09:28,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:28,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:28,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:28,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:28,857 INFO L87 Difference]: Start difference. First operand 17883 states and 62267 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:29,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:29,143 INFO L93 Difference]: Finished difference Result 19170 states and 65905 transitions. [2021-05-03 14:09:29,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:09:29,143 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:29,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:29,182 INFO L225 Difference]: With dead ends: 19170 [2021-05-03 14:09:29,182 INFO L226 Difference]: Without dead ends: 19170 [2021-05-03 14:09:29,182 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 212.8ms TimeCoverageRelationStatistics Valid=400, Invalid=790, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:09:29,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19170 states. [2021-05-03 14:09:29,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19170 to 17477. [2021-05-03 14:09:29,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17477 states, 17476 states have (on average 3.482776379034104) internal successors, (60865), 17476 states have internal predecessors, (60865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:29,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17477 states to 17477 states and 60865 transitions. [2021-05-03 14:09:29,571 INFO L78 Accepts]: Start accepts. Automaton has 17477 states and 60865 transitions. Word has length 22 [2021-05-03 14:09:29,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:29,571 INFO L480 AbstractCegarLoop]: Abstraction has 17477 states and 60865 transitions. [2021-05-03 14:09:29,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 17477 states and 60865 transitions. [2021-05-03 14:09:29,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:29,576 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:29,576 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:29,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24609,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:29,777 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:29,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1933767607, now seen corresponding path program 192 times [2021-05-03 14:09:29,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:29,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795644437] [2021-05-03 14:09:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:29,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795644437] [2021-05-03 14:09:29,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555369792] [2021-05-03 14:09:29,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:29,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:09:29,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:29,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:29,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:29,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:29,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:29,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805337315] [2021-05-03 14:09:29,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:29,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:29,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:29,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:29,917 INFO L87 Difference]: Start difference. First operand 17477 states and 60865 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:30,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:30,190 INFO L93 Difference]: Finished difference Result 18240 states and 62909 transitions. [2021-05-03 14:09:30,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:09:30,191 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:30,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:30,225 INFO L225 Difference]: With dead ends: 18240 [2021-05-03 14:09:30,226 INFO L226 Difference]: Without dead ends: 18233 [2021-05-03 14:09:30,226 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 185.1ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:09:30,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18233 states. [2021-05-03 14:09:30,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18233 to 17495. [2021-05-03 14:09:30,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17495 states, 17494 states have (on average 3.4824511261003774) internal successors, (60922), 17494 states have internal predecessors, (60922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17495 states to 17495 states and 60922 transitions. [2021-05-03 14:09:30,521 INFO L78 Accepts]: Start accepts. Automaton has 17495 states and 60922 transitions. Word has length 22 [2021-05-03 14:09:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:30,521 INFO L480 AbstractCegarLoop]: Abstraction has 17495 states and 60922 transitions. [2021-05-03 14:09:30,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 17495 states and 60922 transitions. [2021-05-03 14:09:30,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:30,527 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:30,527 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:30,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24610 [2021-05-03 14:09:30,728 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:30,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:30,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1675279652, now seen corresponding path program 193 times [2021-05-03 14:09:30,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:30,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953902543] [2021-05-03 14:09:30,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:30,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:30,802 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:30,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953902543] [2021-05-03 14:09:30,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028473195] [2021-05-03 14:09:30,802 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 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 [2021-05-03 14:09:30,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:30,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:30,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:30,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:30,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:30,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568300750] [2021-05-03 14:09:30,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:30,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:30,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:30,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:30,868 INFO L87 Difference]: Start difference. First operand 17495 states and 60922 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:31,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:31,246 INFO L93 Difference]: Finished difference Result 18422 states and 63184 transitions. [2021-05-03 14:09:31,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 14:09:31,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:31,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:31,478 INFO L225 Difference]: With dead ends: 18422 [2021-05-03 14:09:31,478 INFO L226 Difference]: Without dead ends: 18422 [2021-05-03 14:09:31,478 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 294.6ms TimeCoverageRelationStatistics Valid=643, Invalid=1249, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 14:09:31,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18422 states. [2021-05-03 14:09:31,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18422 to 17443. [2021-05-03 14:09:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17443 states, 17442 states have (on average 3.4833161334709324) internal successors, (60756), 17442 states have internal predecessors, (60756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17443 states to 17443 states and 60756 transitions. [2021-05-03 14:09:31,709 INFO L78 Accepts]: Start accepts. Automaton has 17443 states and 60756 transitions. Word has length 22 [2021-05-03 14:09:31,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:31,709 INFO L480 AbstractCegarLoop]: Abstraction has 17443 states and 60756 transitions. [2021-05-03 14:09:31,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:31,709 INFO L276 IsEmpty]: Start isEmpty. Operand 17443 states and 60756 transitions. [2021-05-03 14:09:31,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:31,714 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:31,714 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:31,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24611 [2021-05-03 14:09:31,915 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:31,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:31,915 INFO L82 PathProgramCache]: Analyzing trace with hash 4885383, now seen corresponding path program 194 times [2021-05-03 14:09:31,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:31,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279406202] [2021-05-03 14:09:31,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:31,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279406202] [2021-05-03 14:09:31,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875371931] [2021-05-03 14:09:31,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:31,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:31,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:31,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:31,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:32,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:32,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:09:32,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385667479] [2021-05-03 14:09:32,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:32,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:32,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:32,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:32,040 INFO L87 Difference]: Start difference. First operand 17443 states and 60756 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:32,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:32,172 INFO L93 Difference]: Finished difference Result 17724 states and 61191 transitions. [2021-05-03 14:09:32,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:09:32,173 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:32,203 INFO L225 Difference]: With dead ends: 17724 [2021-05-03 14:09:32,203 INFO L226 Difference]: Without dead ends: 17724 [2021-05-03 14:09:32,203 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 69.1ms TimeCoverageRelationStatistics Valid=132, Invalid=174, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:09:32,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17724 states. [2021-05-03 14:09:32,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17724 to 17454. [2021-05-03 14:09:32,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17454 states, 17453 states have (on average 3.4828396264252564) internal successors, (60786), 17453 states have internal predecessors, (60786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:32,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17454 states to 17454 states and 60786 transitions. [2021-05-03 14:09:32,504 INFO L78 Accepts]: Start accepts. Automaton has 17454 states and 60786 transitions. Word has length 22 [2021-05-03 14:09:32,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:32,504 INFO L480 AbstractCegarLoop]: Abstraction has 17454 states and 60786 transitions. [2021-05-03 14:09:32,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:32,504 INFO L276 IsEmpty]: Start isEmpty. Operand 17454 states and 60786 transitions. [2021-05-03 14:09:32,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:32,510 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:32,510 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:32,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24612,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:32,710 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:32,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:32,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1088175516, now seen corresponding path program 195 times [2021-05-03 14:09:32,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:32,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220698008] [2021-05-03 14:09:32,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:32,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220698008] [2021-05-03 14:09:32,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499283383] [2021-05-03 14:09:32,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:32,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:09:32,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:32,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:32,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 27 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:32,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:32,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:09:32,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255988720] [2021-05-03 14:09:32,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:32,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:32,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:32,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:32,947 INFO L87 Difference]: Start difference. First operand 17454 states and 60786 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:33,160 INFO L93 Difference]: Finished difference Result 17701 states and 61136 transitions. [2021-05-03 14:09:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:09:33,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:33,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:33,195 INFO L225 Difference]: With dead ends: 17701 [2021-05-03 14:09:33,195 INFO L226 Difference]: Without dead ends: 17697 [2021-05-03 14:09:33,195 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 123.2ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:09:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17697 states. [2021-05-03 14:09:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17697 to 16993. [2021-05-03 14:09:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16993 states, 16992 states have (on average 3.480637947269303) internal successors, (59143), 16992 states have internal predecessors, (59143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:33,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16993 states to 16993 states and 59143 transitions. [2021-05-03 14:09:33,521 INFO L78 Accepts]: Start accepts. Automaton has 16993 states and 59143 transitions. Word has length 22 [2021-05-03 14:09:33,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:33,521 INFO L480 AbstractCegarLoop]: Abstraction has 16993 states and 59143 transitions. [2021-05-03 14:09:33,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:33,522 INFO L276 IsEmpty]: Start isEmpty. Operand 16993 states and 59143 transitions. [2021-05-03 14:09:33,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:33,527 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:33,527 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:33,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24613 [2021-05-03 14:09:33,730 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:33,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:33,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1744977693, now seen corresponding path program 196 times [2021-05-03 14:09:33,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:33,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569330160] [2021-05-03 14:09:33,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:33,790 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:33,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569330160] [2021-05-03 14:09:33,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577229007] [2021-05-03 14:09:33,791 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:33,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:33,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:33,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:33,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:33,844 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:33,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:33,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:09:33,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715947470] [2021-05-03 14:09:33,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:33,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:33,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:33,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:33,845 INFO L87 Difference]: Start difference. First operand 16993 states and 59143 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:34,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:34,054 INFO L93 Difference]: Finished difference Result 17251 states and 59526 transitions. [2021-05-03 14:09:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:09:34,055 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:34,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:34,084 INFO L225 Difference]: With dead ends: 17251 [2021-05-03 14:09:34,084 INFO L226 Difference]: Without dead ends: 17250 [2021-05-03 14:09:34,084 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:09:34,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17250 states. [2021-05-03 14:09:34,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17250 to 16993. [2021-05-03 14:09:34,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16993 states, 16992 states have (on average 3.4791666666666665) internal successors, (59118), 16992 states have internal predecessors, (59118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16993 states to 16993 states and 59118 transitions. [2021-05-03 14:09:34,444 INFO L78 Accepts]: Start accepts. Automaton has 16993 states and 59118 transitions. Word has length 22 [2021-05-03 14:09:34,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:34,444 INFO L480 AbstractCegarLoop]: Abstraction has 16993 states and 59118 transitions. [2021-05-03 14:09:34,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:34,444 INFO L276 IsEmpty]: Start isEmpty. Operand 16993 states and 59118 transitions. [2021-05-03 14:09:34,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:34,450 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:34,450 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:34,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24614 [2021-05-03 14:09:34,650 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:34,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:34,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1627570870, now seen corresponding path program 197 times [2021-05-03 14:09:34,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:34,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543614005] [2021-05-03 14:09:34,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:34,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543614005] [2021-05-03 14:09:34,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789301601] [2021-05-03 14:09:34,732 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:09:34,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:09:34,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:34,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:34,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:34,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:34,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:09:34,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414990449] [2021-05-03 14:09:34,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:34,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:34,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:34,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:34,804 INFO L87 Difference]: Start difference. First operand 16993 states and 59118 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:34,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:34,964 INFO L93 Difference]: Finished difference Result 17351 states and 59762 transitions. [2021-05-03 14:09:34,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:09:34,965 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:34,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:35,007 INFO L225 Difference]: With dead ends: 17351 [2021-05-03 14:09:35,007 INFO L226 Difference]: Without dead ends: 17351 [2021-05-03 14:09:35,007 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:09:35,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17351 states. [2021-05-03 14:09:35,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17351 to 17008. [2021-05-03 14:09:35,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17008 states, 17007 states have (on average 3.477744458164285) internal successors, (59146), 17007 states have internal predecessors, (59146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:35,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17008 states to 17008 states and 59146 transitions. [2021-05-03 14:09:35,355 INFO L78 Accepts]: Start accepts. Automaton has 17008 states and 59146 transitions. Word has length 22 [2021-05-03 14:09:35,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:35,355 INFO L480 AbstractCegarLoop]: Abstraction has 17008 states and 59146 transitions. [2021-05-03 14:09:35,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:35,355 INFO L276 IsEmpty]: Start isEmpty. Operand 17008 states and 59146 transitions. [2021-05-03 14:09:35,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:35,361 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:35,361 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:35,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24615,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:35,562 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:35,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:35,562 INFO L82 PathProgramCache]: Analyzing trace with hash -839376295, now seen corresponding path program 198 times [2021-05-03 14:09:35,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:35,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054485636] [2021-05-03 14:09:35,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:35,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054485636] [2021-05-03 14:09:35,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325063354] [2021-05-03 14:09:35,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:35,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-03 14:09:35,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:35,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:35,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:35,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:35,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:09:35,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248016201] [2021-05-03 14:09:35,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:09:35,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:35,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:09:35,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:09:35,694 INFO L87 Difference]: Start difference. First operand 17008 states and 59146 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:35,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:35,942 INFO L93 Difference]: Finished difference Result 17271 states and 59536 transitions. [2021-05-03 14:09:35,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:09:35,943 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:35,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:35,980 INFO L225 Difference]: With dead ends: 17271 [2021-05-03 14:09:35,980 INFO L226 Difference]: Without dead ends: 17269 [2021-05-03 14:09:35,980 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:09:35,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17269 states. [2021-05-03 14:09:36,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17269 to 17008. [2021-05-03 14:09:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17008 states, 17007 states have (on average 3.4775092608925737) internal successors, (59142), 17007 states have internal predecessors, (59142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:36,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17008 states to 17008 states and 59142 transitions. [2021-05-03 14:09:36,350 INFO L78 Accepts]: Start accepts. Automaton has 17008 states and 59142 transitions. Word has length 22 [2021-05-03 14:09:36,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:36,350 INFO L480 AbstractCegarLoop]: Abstraction has 17008 states and 59142 transitions. [2021-05-03 14:09:36,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:36,350 INFO L276 IsEmpty]: Start isEmpty. Operand 17008 states and 59142 transitions. [2021-05-03 14:09:36,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:36,356 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:36,356 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:36,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24616 [2021-05-03 14:09:36,556 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:36,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:36,557 INFO L82 PathProgramCache]: Analyzing trace with hash 938349092, now seen corresponding path program 199 times [2021-05-03 14:09:36,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:36,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840725998] [2021-05-03 14:09:36,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:36,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:36,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840725998] [2021-05-03 14:09:36,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975446759] [2021-05-03 14:09:36,615 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:36,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:36,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 23 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:36,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:36,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:09:36,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455252329] [2021-05-03 14:09:36,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:09:36,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:36,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:09:36,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:09:36,680 INFO L87 Difference]: Start difference. First operand 17008 states and 59142 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:36,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:36,816 INFO L93 Difference]: Finished difference Result 17397 states and 59814 transitions. [2021-05-03 14:09:36,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:09:36,821 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:36,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:36,860 INFO L225 Difference]: With dead ends: 17397 [2021-05-03 14:09:36,860 INFO L226 Difference]: Without dead ends: 17397 [2021-05-03 14:09:36,861 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 79.3ms TimeCoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:09:36,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17397 states. [2021-05-03 14:09:37,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17397 to 16977. [2021-05-03 14:09:37,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16977 states, 16976 states have (on average 3.4736687087653157) internal successors, (58969), 16976 states have internal predecessors, (58969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:37,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16977 states to 16977 states and 58969 transitions. [2021-05-03 14:09:37,231 INFO L78 Accepts]: Start accepts. Automaton has 16977 states and 58969 transitions. Word has length 22 [2021-05-03 14:09:37,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:37,231 INFO L480 AbstractCegarLoop]: Abstraction has 16977 states and 58969 transitions. [2021-05-03 14:09:37,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:37,231 INFO L276 IsEmpty]: Start isEmpty. Operand 16977 states and 58969 transitions. [2021-05-03 14:09:37,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:37,238 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:37,238 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:37,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24617,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:37,459 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:37,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:37,459 INFO L82 PathProgramCache]: Analyzing trace with hash 650028701, now seen corresponding path program 200 times [2021-05-03 14:09:37,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:37,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805891979] [2021-05-03 14:09:37,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:37,523 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:37,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805891979] [2021-05-03 14:09:37,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624305216] [2021-05-03 14:09:37,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:37,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:37,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:37,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:37,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:37,582 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:37,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:37,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:09:37,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979304235] [2021-05-03 14:09:37,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:09:37,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:37,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:09:37,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:09:37,583 INFO L87 Difference]: Start difference. First operand 16977 states and 58969 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:37,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:37,789 INFO L93 Difference]: Finished difference Result 19691 states and 67365 transitions. [2021-05-03 14:09:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:09:37,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:37,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:37,916 INFO L225 Difference]: With dead ends: 19691 [2021-05-03 14:09:37,917 INFO L226 Difference]: Without dead ends: 19688 [2021-05-03 14:09:37,917 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:09:37,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19688 states. [2021-05-03 14:09:38,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19688 to 17043. [2021-05-03 14:09:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17043 states, 17042 states have (on average 3.4742987912216874) internal successors, (59209), 17042 states have internal predecessors, (59209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17043 states to 17043 states and 59209 transitions. [2021-05-03 14:09:38,198 INFO L78 Accepts]: Start accepts. Automaton has 17043 states and 59209 transitions. Word has length 22 [2021-05-03 14:09:38,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:38,199 INFO L480 AbstractCegarLoop]: Abstraction has 17043 states and 59209 transitions. [2021-05-03 14:09:38,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:38,199 INFO L276 IsEmpty]: Start isEmpty. Operand 17043 states and 59209 transitions. [2021-05-03 14:09:38,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:38,204 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:38,204 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:38,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24618 [2021-05-03 14:09:38,404 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:38,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:38,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1122510710, now seen corresponding path program 201 times [2021-05-03 14:09:38,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:38,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454990765] [2021-05-03 14:09:38,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:38,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454990765] [2021-05-03 14:09:38,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942485686] [2021-05-03 14:09:38,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:38,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:09:38,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:38,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:38,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:38,531 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 20 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:38,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:38,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:09:38,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841195369] [2021-05-03 14:09:38,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:09:38,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:38,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:09:38,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:09:38,532 INFO L87 Difference]: Start difference. First operand 17043 states and 59209 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:38,687 INFO L93 Difference]: Finished difference Result 26038 states and 89720 transitions. [2021-05-03 14:09:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:09:38,687 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:38,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:38,747 INFO L225 Difference]: With dead ends: 26038 [2021-05-03 14:09:38,748 INFO L226 Difference]: Without dead ends: 26038 [2021-05-03 14:09:38,748 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:09:38,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26038 states. [2021-05-03 14:09:39,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26038 to 25505. [2021-05-03 14:09:39,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25505 states, 25504 states have (on average 3.4754548306148054) internal successors, (88638), 25504 states have internal predecessors, (88638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25505 states to 25505 states and 88638 transitions. [2021-05-03 14:09:39,177 INFO L78 Accepts]: Start accepts. Automaton has 25505 states and 88638 transitions. Word has length 22 [2021-05-03 14:09:39,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:39,177 INFO L480 AbstractCegarLoop]: Abstraction has 25505 states and 88638 transitions. [2021-05-03 14:09:39,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:39,177 INFO L276 IsEmpty]: Start isEmpty. Operand 25505 states and 88638 transitions. [2021-05-03 14:09:39,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:39,183 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:39,183 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:39,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24619,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:39,383 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:39,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:39,384 INFO L82 PathProgramCache]: Analyzing trace with hash -423056679, now seen corresponding path program 202 times [2021-05-03 14:09:39,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:39,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843904387] [2021-05-03 14:09:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:39,526 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 3 [2021-05-03 14:09:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:39,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843904387] [2021-05-03 14:09:39,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775876251] [2021-05-03 14:09:39,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:39,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:39,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:39,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:39,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:39,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:39,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:39,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114736164] [2021-05-03 14:09:39,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:39,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:39,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:39,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:39,651 INFO L87 Difference]: Start difference. First operand 25505 states and 88638 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:39,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:39,903 INFO L93 Difference]: Finished difference Result 28515 states and 98094 transitions. [2021-05-03 14:09:39,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:09:39,903 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:39,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:39,969 INFO L225 Difference]: With dead ends: 28515 [2021-05-03 14:09:39,969 INFO L226 Difference]: Without dead ends: 28511 [2021-05-03 14:09:39,970 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 265.8ms TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:09:39,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28511 states. [2021-05-03 14:09:40,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28511 to 25686. [2021-05-03 14:09:40,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25686 states, 25685 states have (on average 3.4768152618259687) internal successors, (89302), 25685 states have internal predecessors, (89302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:40,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25686 states to 25686 states and 89302 transitions. [2021-05-03 14:09:40,439 INFO L78 Accepts]: Start accepts. Automaton has 25686 states and 89302 transitions. Word has length 22 [2021-05-03 14:09:40,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:40,439 INFO L480 AbstractCegarLoop]: Abstraction has 25686 states and 89302 transitions. [2021-05-03 14:09:40,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:40,439 INFO L276 IsEmpty]: Start isEmpty. Operand 25686 states and 89302 transitions. [2021-05-03 14:09:40,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:40,445 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:40,445 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:40,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24620 [2021-05-03 14:09:40,646 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:40,646 INFO L82 PathProgramCache]: Analyzing trace with hash -584655132, now seen corresponding path program 203 times [2021-05-03 14:09:40,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:40,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471560044] [2021-05-03 14:09:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:40,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471560044] [2021-05-03 14:09:40,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980223690] [2021-05-03 14:09:40,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:40,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:09:40,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:40,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:40,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:40,783 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:40,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:40,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:40,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307632654] [2021-05-03 14:09:40,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:40,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:40,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:40,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:40,784 INFO L87 Difference]: Start difference. First operand 25686 states and 89302 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:40,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:40,994 INFO L93 Difference]: Finished difference Result 26560 states and 91297 transitions. [2021-05-03 14:09:40,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:09:40,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:40,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:41,046 INFO L225 Difference]: With dead ends: 26560 [2021-05-03 14:09:41,046 INFO L226 Difference]: Without dead ends: 26560 [2021-05-03 14:09:41,047 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:09:41,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26560 states. [2021-05-03 14:09:41,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26560 to 25734. [2021-05-03 14:09:41,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25734 states, 25733 states have (on average 3.4752263630357905) internal successors, (89428), 25733 states have internal predecessors, (89428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25734 states to 25734 states and 89428 transitions. [2021-05-03 14:09:41,563 INFO L78 Accepts]: Start accepts. Automaton has 25734 states and 89428 transitions. Word has length 22 [2021-05-03 14:09:41,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:41,563 INFO L480 AbstractCegarLoop]: Abstraction has 25734 states and 89428 transitions. [2021-05-03 14:09:41,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:41,564 INFO L276 IsEmpty]: Start isEmpty. Operand 25734 states and 89428 transitions. [2021-05-03 14:09:41,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:41,569 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:41,569 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:41,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24621,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:41,770 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:41,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:41,770 INFO L82 PathProgramCache]: Analyzing trace with hash 671034909, now seen corresponding path program 204 times [2021-05-03 14:09:41,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:41,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591546295] [2021-05-03 14:09:41,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:41,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591546295] [2021-05-03 14:09:41,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318426800] [2021-05-03 14:09:41,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:41,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:09:41,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:41,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:41,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:41,902 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:41,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:41,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:41,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467238928] [2021-05-03 14:09:41,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:41,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:41,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:41,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:41,903 INFO L87 Difference]: Start difference. First operand 25734 states and 89428 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:42,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:42,156 INFO L93 Difference]: Finished difference Result 26225 states and 90728 transitions. [2021-05-03 14:09:42,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:09:42,156 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:42,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:42,218 INFO L225 Difference]: With dead ends: 26225 [2021-05-03 14:09:42,218 INFO L226 Difference]: Without dead ends: 26220 [2021-05-03 14:09:42,218 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:09:42,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26220 states. [2021-05-03 14:09:42,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26220 to 25734. [2021-05-03 14:09:42,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25734 states, 25733 states have (on average 3.475187502428788) internal successors, (89427), 25733 states have internal predecessors, (89427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:42,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25734 states to 25734 states and 89427 transitions. [2021-05-03 14:09:42,798 INFO L78 Accepts]: Start accepts. Automaton has 25734 states and 89427 transitions. Word has length 22 [2021-05-03 14:09:42,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:42,798 INFO L480 AbstractCegarLoop]: Abstraction has 25734 states and 89427 transitions. [2021-05-03 14:09:42,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:42,798 INFO L276 IsEmpty]: Start isEmpty. Operand 25734 states and 89427 transitions. [2021-05-03 14:09:42,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:42,803 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:42,804 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:43,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24622 [2021-05-03 14:09:43,004 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:43,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:43,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1091001398, now seen corresponding path program 205 times [2021-05-03 14:09:43,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:43,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513902913] [2021-05-03 14:09:43,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:43,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:43,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513902913] [2021-05-03 14:09:43,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092837755] [2021-05-03 14:09:43,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:43,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:43,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:43,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:43,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:43,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061247652] [2021-05-03 14:09:43,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:43,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:43,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:43,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:43,139 INFO L87 Difference]: Start difference. First operand 25734 states and 89427 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:43,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:43,340 INFO L93 Difference]: Finished difference Result 28702 states and 98967 transitions. [2021-05-03 14:09:43,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:09:43,341 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:43,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:43,396 INFO L225 Difference]: With dead ends: 28702 [2021-05-03 14:09:43,396 INFO L226 Difference]: Without dead ends: 28702 [2021-05-03 14:09:43,396 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:09:43,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28702 states. [2021-05-03 14:09:43,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28702 to 28343. [2021-05-03 14:09:43,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28343 states, 28342 states have (on average 3.469938607014325) internal successors, (98345), 28342 states have internal predecessors, (98345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:43,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 98345 transitions. [2021-05-03 14:09:43,879 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 98345 transitions. Word has length 22 [2021-05-03 14:09:43,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:43,879 INFO L480 AbstractCegarLoop]: Abstraction has 28343 states and 98345 transitions. [2021-05-03 14:09:43,879 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:43,879 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 98345 transitions. [2021-05-03 14:09:43,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:43,885 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:43,885 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:44,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24623 [2021-05-03 14:09:44,086 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:44,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:44,086 INFO L82 PathProgramCache]: Analyzing trace with hash 228135769, now seen corresponding path program 206 times [2021-05-03 14:09:44,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:44,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287700737] [2021-05-03 14:09:44,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:44,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287700737] [2021-05-03 14:09:44,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309993123] [2021-05-03 14:09:44,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:44,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:44,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:44,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:44,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:44,504 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:44,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:44,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:44,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557149150] [2021-05-03 14:09:44,505 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:44,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:44,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:44,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:44,505 INFO L87 Difference]: Start difference. First operand 28343 states and 98345 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:44,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:44,740 INFO L93 Difference]: Finished difference Result 28805 states and 99574 transitions. [2021-05-03 14:09:44,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:09:44,741 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:44,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:44,801 INFO L225 Difference]: With dead ends: 28805 [2021-05-03 14:09:44,801 INFO L226 Difference]: Without dead ends: 28799 [2021-05-03 14:09:44,801 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 136.1ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:09:44,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28799 states. [2021-05-03 14:09:45,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28799 to 28343. [2021-05-03 14:09:45,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28343 states, 28342 states have (on average 3.4699033236892243) internal successors, (98344), 28342 states have internal predecessors, (98344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:45,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28343 states to 28343 states and 98344 transitions. [2021-05-03 14:09:45,331 INFO L78 Accepts]: Start accepts. Automaton has 28343 states and 98344 transitions. Word has length 22 [2021-05-03 14:09:45,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:45,331 INFO L480 AbstractCegarLoop]: Abstraction has 28343 states and 98344 transitions. [2021-05-03 14:09:45,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:45,331 INFO L276 IsEmpty]: Start isEmpty. Operand 28343 states and 98344 transitions. [2021-05-03 14:09:45,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:45,337 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:45,338 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:45,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24624,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:45,538 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:45,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:45,538 INFO L82 PathProgramCache]: Analyzing trace with hash 392133540, now seen corresponding path program 207 times [2021-05-03 14:09:45,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:45,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369444528] [2021-05-03 14:09:45,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:45,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369444528] [2021-05-03 14:09:45,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872901890] [2021-05-03 14:09:45,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:45,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:09:45,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:45,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:45,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:45,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:45,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:45,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836977077] [2021-05-03 14:09:45,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:45,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:45,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:45,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:45,680 INFO L87 Difference]: Start difference. First operand 28343 states and 98344 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:46,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:46,113 INFO L93 Difference]: Finished difference Result 29601 states and 101949 transitions. [2021-05-03 14:09:46,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:09:46,114 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:46,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:46,171 INFO L225 Difference]: With dead ends: 29601 [2021-05-03 14:09:46,171 INFO L226 Difference]: Without dead ends: 29601 [2021-05-03 14:09:46,171 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 172.0ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:09:46,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29601 states. [2021-05-03 14:09:46,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29601 to 29306. [2021-05-03 14:09:46,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29306 states, 29305 states have (on average 3.463504521412728) internal successors, (101498), 29305 states have internal predecessors, (101498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:46,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29306 states to 29306 states and 101498 transitions. [2021-05-03 14:09:46,675 INFO L78 Accepts]: Start accepts. Automaton has 29306 states and 101498 transitions. Word has length 22 [2021-05-03 14:09:46,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:46,676 INFO L480 AbstractCegarLoop]: Abstraction has 29306 states and 101498 transitions. [2021-05-03 14:09:46,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:46,676 INFO L276 IsEmpty]: Start isEmpty. Operand 29306 states and 101498 transitions. [2021-05-03 14:09:46,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:46,683 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:46,683 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:46,884 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24625 [2021-05-03 14:09:46,884 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:46,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:46,885 INFO L82 PathProgramCache]: Analyzing trace with hash -616835683, now seen corresponding path program 208 times [2021-05-03 14:09:46,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:46,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201495614] [2021-05-03 14:09:46,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:46,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:46,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201495614] [2021-05-03 14:09:46,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120295169] [2021-05-03 14:09:46,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:46,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:46,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:46,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:46,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:47,022 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:47,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:47,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:47,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235779707] [2021-05-03 14:09:47,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:47,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:47,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:47,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:47,023 INFO L87 Difference]: Start difference. First operand 29306 states and 101498 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:47,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:47,269 INFO L93 Difference]: Finished difference Result 29739 states and 102655 transitions. [2021-05-03 14:09:47,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:09:47,269 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:47,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:47,329 INFO L225 Difference]: With dead ends: 29739 [2021-05-03 14:09:47,329 INFO L226 Difference]: Without dead ends: 29732 [2021-05-03 14:09:47,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 140.1ms TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:09:47,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29732 states. [2021-05-03 14:09:47,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29732 to 29306. [2021-05-03 14:09:47,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29306 states, 29305 states have (on average 3.463470397543081) internal successors, (101497), 29305 states have internal predecessors, (101497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:47,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29306 states to 29306 states and 101497 transitions. [2021-05-03 14:09:47,916 INFO L78 Accepts]: Start accepts. Automaton has 29306 states and 101497 transitions. Word has length 22 [2021-05-03 14:09:47,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:47,917 INFO L480 AbstractCegarLoop]: Abstraction has 29306 states and 101497 transitions. [2021-05-03 14:09:47,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:47,917 INFO L276 IsEmpty]: Start isEmpty. Operand 29306 states and 101497 transitions. [2021-05-03 14:09:47,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:47,924 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:47,924 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:48,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24626 [2021-05-03 14:09:48,124 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:48,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:48,125 INFO L82 PathProgramCache]: Analyzing trace with hash -875323638, now seen corresponding path program 209 times [2021-05-03 14:09:48,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:48,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925091913] [2021-05-03 14:09:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:48,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925091913] [2021-05-03 14:09:48,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119341330] [2021-05-03 14:09:48,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:48,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:09:48,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:48,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:48,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:48,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:48,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:48,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016021156] [2021-05-03 14:09:48,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:48,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:48,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:48,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:48,266 INFO L87 Difference]: Start difference. First operand 29306 states and 101497 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:48,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:48,652 INFO L93 Difference]: Finished difference Result 29939 states and 102947 transitions. [2021-05-03 14:09:48,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:09:48,653 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:48,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:48,712 INFO L225 Difference]: With dead ends: 29939 [2021-05-03 14:09:48,712 INFO L226 Difference]: Without dead ends: 29939 [2021-05-03 14:09:48,712 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 262.4ms TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 14:09:48,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29939 states. [2021-05-03 14:09:49,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29939 to 29574. [2021-05-03 14:09:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29574 states, 29573 states have (on average 3.4610286409900923) internal successors, (102353), 29573 states have internal predecessors, (102353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:49,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29574 states to 29574 states and 102353 transitions. [2021-05-03 14:09:49,388 INFO L78 Accepts]: Start accepts. Automaton has 29574 states and 102353 transitions. Word has length 22 [2021-05-03 14:09:49,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:49,389 INFO L480 AbstractCegarLoop]: Abstraction has 29574 states and 102353 transitions. [2021-05-03 14:09:49,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:49,389 INFO L276 IsEmpty]: Start isEmpty. Operand 29574 states and 102353 transitions. [2021-05-03 14:09:49,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:49,397 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:49,397 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:49,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24627,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:49,597 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:49,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:49,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1041146919, now seen corresponding path program 210 times [2021-05-03 14:09:49,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:49,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926141565] [2021-05-03 14:09:49,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:49,685 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:49,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926141565] [2021-05-03 14:09:49,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596884726] [2021-05-03 14:09:49,685 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 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 [2021-05-03 14:09:49,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:09:49,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:49,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:49,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:49,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:49,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:49,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65283823] [2021-05-03 14:09:49,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:49,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:49,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:49,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:49,751 INFO L87 Difference]: Start difference. First operand 29574 states and 102353 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:49,987 INFO L93 Difference]: Finished difference Result 29973 states and 103433 transitions. [2021-05-03 14:09:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:09:49,988 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:49,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:50,050 INFO L225 Difference]: With dead ends: 29973 [2021-05-03 14:09:50,050 INFO L226 Difference]: Without dead ends: 29965 [2021-05-03 14:09:50,051 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 151.2ms TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:09:50,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29965 states. [2021-05-03 14:09:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29965 to 29574. [2021-05-03 14:09:50,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29574 states, 29573 states have (on average 3.460994826361884) internal successors, (102352), 29573 states have internal predecessors, (102352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:50,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29574 states to 29574 states and 102352 transitions. [2021-05-03 14:09:50,748 INFO L78 Accepts]: Start accepts. Automaton has 29574 states and 102352 transitions. Word has length 22 [2021-05-03 14:09:50,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:50,748 INFO L480 AbstractCegarLoop]: Abstraction has 29574 states and 102352 transitions. [2021-05-03 14:09:50,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:50,748 INFO L276 IsEmpty]: Start isEmpty. Operand 29574 states and 102352 transitions. [2021-05-03 14:09:50,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:50,756 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:50,756 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:50,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24628,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:50,957 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:50,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:50,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1511790492, now seen corresponding path program 211 times [2021-05-03 14:09:50,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:50,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532579325] [2021-05-03 14:09:50,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:51,037 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:51,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532579325] [2021-05-03 14:09:51,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481311985] [2021-05-03 14:09:51,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:51,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:51,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:51,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:51,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:09:51,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145856155] [2021-05-03 14:09:51,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:09:51,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:51,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:09:51,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:09:51,106 INFO L87 Difference]: Start difference. First operand 29574 states and 102352 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:51,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:51,587 INFO L93 Difference]: Finished difference Result 30267 states and 103892 transitions. [2021-05-03 14:09:51,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 14:09:51,587 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:51,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:51,659 INFO L225 Difference]: With dead ends: 30267 [2021-05-03 14:09:51,659 INFO L226 Difference]: Without dead ends: 30267 [2021-05-03 14:09:51,660 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 349.8ms TimeCoverageRelationStatistics Valid=754, Invalid=1502, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 14:09:51,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30267 states. [2021-05-03 14:09:52,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30267 to 29743. [2021-05-03 14:09:52,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29743 states, 29742 states have (on average 3.458879698742519) internal successors, (102874), 29742 states have internal predecessors, (102874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:52,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29743 states to 29743 states and 102874 transitions. [2021-05-03 14:09:52,470 INFO L78 Accepts]: Start accepts. Automaton has 29743 states and 102874 transitions. Word has length 22 [2021-05-03 14:09:52,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:52,470 INFO L480 AbstractCegarLoop]: Abstraction has 29743 states and 102874 transitions. [2021-05-03 14:09:52,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:52,470 INFO L276 IsEmpty]: Start isEmpty. Operand 29743 states and 102874 transitions. [2021-05-03 14:09:52,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:52,477 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:52,477 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:52,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24629,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:52,678 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:52,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:52,678 INFO L82 PathProgramCache]: Analyzing trace with hash -2137915585, now seen corresponding path program 212 times [2021-05-03 14:09:52,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:52,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53293677] [2021-05-03 14:09:52,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:52,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:52,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53293677] [2021-05-03 14:09:52,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326651745] [2021-05-03 14:09:52,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:52,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:09:52,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:52,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:52,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:09:52,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:52,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:09:52,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324280959] [2021-05-03 14:09:52,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:52,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:52,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:52,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:52,800 INFO L87 Difference]: Start difference. First operand 29743 states and 102874 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:53,053 INFO L93 Difference]: Finished difference Result 30158 states and 103835 transitions. [2021-05-03 14:09:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:09:53,054 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:53,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:53,124 INFO L225 Difference]: With dead ends: 30158 [2021-05-03 14:09:53,124 INFO L226 Difference]: Without dead ends: 30158 [2021-05-03 14:09:53,124 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:09:53,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30158 states. [2021-05-03 14:09:53,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30158 to 29791. [2021-05-03 14:09:53,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29791 states, 29790 states have (on average 3.4585431352802956) internal successors, (103030), 29790 states have internal predecessors, (103030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:53,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29791 states to 29791 states and 103030 transitions. [2021-05-03 14:09:53,977 INFO L78 Accepts]: Start accepts. Automaton has 29791 states and 103030 transitions. Word has length 22 [2021-05-03 14:09:53,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:53,977 INFO L480 AbstractCegarLoop]: Abstraction has 29791 states and 103030 transitions. [2021-05-03 14:09:53,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:53,977 INFO L276 IsEmpty]: Start isEmpty. Operand 29791 states and 103030 transitions. [2021-05-03 14:09:53,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:53,988 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:53,988 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:54,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24630 [2021-05-03 14:09:54,211 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:54,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:54,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1379307466, now seen corresponding path program 213 times [2021-05-03 14:09:54,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:54,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999100176] [2021-05-03 14:09:54,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:54,280 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:54,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999100176] [2021-05-03 14:09:54,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100986375] [2021-05-03 14:09:54,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:54,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:09:54,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:54,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:54,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:54,343 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:09:54,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:54,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:09:54,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054254567] [2021-05-03 14:09:54,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:09:54,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:54,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:09:54,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:09:54,344 INFO L87 Difference]: Start difference. First operand 29791 states and 103030 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:54,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:54,650 INFO L93 Difference]: Finished difference Result 31233 states and 107516 transitions. [2021-05-03 14:09:54,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:09:54,650 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:54,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:54,718 INFO L225 Difference]: With dead ends: 31233 [2021-05-03 14:09:54,718 INFO L226 Difference]: Without dead ends: 31229 [2021-05-03 14:09:54,718 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:09:54,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31229 states. [2021-05-03 14:09:55,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31229 to 28496. [2021-05-03 14:09:55,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28496 states, 28495 states have (on average 3.449131426566064) internal successors, (98283), 28495 states have internal predecessors, (98283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28496 states to 28496 states and 98283 transitions. [2021-05-03 14:09:55,608 INFO L78 Accepts]: Start accepts. Automaton has 28496 states and 98283 transitions. Word has length 22 [2021-05-03 14:09:55,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:55,608 INFO L480 AbstractCegarLoop]: Abstraction has 28496 states and 98283 transitions. [2021-05-03 14:09:55,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:55,608 INFO L276 IsEmpty]: Start isEmpty. Operand 28496 states and 98283 transitions. [2021-05-03 14:09:55,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:55,616 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:55,616 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:55,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24631,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:55,817 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:55,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:55,817 INFO L82 PathProgramCache]: Analyzing trace with hash 2127159261, now seen corresponding path program 214 times [2021-05-03 14:09:55,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:55,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347600880] [2021-05-03 14:09:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:55,891 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:55,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347600880] [2021-05-03 14:09:55,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169832568] [2021-05-03 14:09:55,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:09:55,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:09:55,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:55,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:55,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:55,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:55,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:09:55,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538900979] [2021-05-03 14:09:55,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:55,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:55,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:55,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:55,955 INFO L87 Difference]: Start difference. First operand 28496 states and 98283 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:56,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:56,236 INFO L93 Difference]: Finished difference Result 28956 states and 99501 transitions. [2021-05-03 14:09:56,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:09:56,236 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:56,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:56,310 INFO L225 Difference]: With dead ends: 28956 [2021-05-03 14:09:56,310 INFO L226 Difference]: Without dead ends: 28951 [2021-05-03 14:09:56,310 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 141.4ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:09:56,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28951 states. [2021-05-03 14:09:56,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28951 to 28496. [2021-05-03 14:09:56,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28496 states, 28495 states have (on average 3.449061238813827) internal successors, (98281), 28495 states have internal predecessors, (98281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:56,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28496 states to 28496 states and 98281 transitions. [2021-05-03 14:09:56,854 INFO L78 Accepts]: Start accepts. Automaton has 28496 states and 98281 transitions. Word has length 22 [2021-05-03 14:09:56,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:56,854 INFO L480 AbstractCegarLoop]: Abstraction has 28496 states and 98281 transitions. [2021-05-03 14:09:56,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:56,854 INFO L276 IsEmpty]: Start isEmpty. Operand 28496 states and 98281 transitions. [2021-05-03 14:09:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:56,863 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:56,863 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:57,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24632 [2021-05-03 14:09:57,072 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:57,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:57,072 INFO L82 PathProgramCache]: Analyzing trace with hash 365122954, now seen corresponding path program 215 times [2021-05-03 14:09:57,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:57,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983043277] [2021-05-03 14:09:57,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:57,135 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:57,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983043277] [2021-05-03 14:09:57,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166014790] [2021-05-03 14:09:57,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:57,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:09:57,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:57,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:57,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:09:57,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:57,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:09:57,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61707290] [2021-05-03 14:09:57,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:09:57,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:57,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:09:57,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:09:57,202 INFO L87 Difference]: Start difference. First operand 28496 states and 98281 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:57,479 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-05-03 14:09:57,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:57,801 INFO L93 Difference]: Finished difference Result 34766 states and 118378 transitions. [2021-05-03 14:09:57,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:09:57,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:57,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:57,871 INFO L225 Difference]: With dead ends: 34766 [2021-05-03 14:09:57,871 INFO L226 Difference]: Without dead ends: 34766 [2021-05-03 14:09:57,872 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 416.9ms TimeCoverageRelationStatistics Valid=301, Invalid=569, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:09:57,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34766 states. [2021-05-03 14:09:58,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34766 to 33433. [2021-05-03 14:09:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33433 states, 33432 states have (on average 3.4411043311797083) internal successors, (115043), 33432 states have internal predecessors, (115043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:58,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33433 states to 33433 states and 115043 transitions. [2021-05-03 14:09:58,515 INFO L78 Accepts]: Start accepts. Automaton has 33433 states and 115043 transitions. Word has length 22 [2021-05-03 14:09:58,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:58,515 INFO L480 AbstractCegarLoop]: Abstraction has 33433 states and 115043 transitions. [2021-05-03 14:09:58,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 33433 states and 115043 transitions. [2021-05-03 14:09:58,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:58,525 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:58,525 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:09:58,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24633 [2021-05-03 14:09:58,725 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:09:58,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:09:58,725 INFO L82 PathProgramCache]: Analyzing trace with hash 859702083, now seen corresponding path program 216 times [2021-05-03 14:09:58,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:09:58,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487169529] [2021-05-03 14:09:58,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:09:58,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:09:58,811 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:58,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487169529] [2021-05-03 14:09:58,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806157518] [2021-05-03 14:09:58,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:09:58,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:09:58,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:09:58,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:09:58,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:09:58,870 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:09:58,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:09:58,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:09:58,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381443539] [2021-05-03 14:09:58,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:09:58,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:09:58,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:09:58,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:09:58,871 INFO L87 Difference]: Start difference. First operand 33433 states and 115043 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:59,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:09:59,274 INFO L93 Difference]: Finished difference Result 33998 states and 116476 transitions. [2021-05-03 14:09:59,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:09:59,274 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:09:59,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:09:59,339 INFO L225 Difference]: With dead ends: 33998 [2021-05-03 14:09:59,340 INFO L226 Difference]: Without dead ends: 33993 [2021-05-03 14:09:59,340 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:09:59,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33993 states. [2021-05-03 14:09:59,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33993 to 33433. [2021-05-03 14:09:59,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33433 states, 33432 states have (on average 3.440984685331419) internal successors, (115039), 33432 states have internal predecessors, (115039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:59,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33433 states to 33433 states and 115039 transitions. [2021-05-03 14:09:59,929 INFO L78 Accepts]: Start accepts. Automaton has 33433 states and 115039 transitions. Word has length 22 [2021-05-03 14:09:59,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:09:59,929 INFO L480 AbstractCegarLoop]: Abstraction has 33433 states and 115039 transitions. [2021-05-03 14:09:59,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:09:59,929 INFO L276 IsEmpty]: Start isEmpty. Operand 33433 states and 115039 transitions. [2021-05-03 14:09:59,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:09:59,937 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:09:59,937 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:00,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24634,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:00,138 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:00,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:00,138 INFO L82 PathProgramCache]: Analyzing trace with hash -902334224, now seen corresponding path program 217 times [2021-05-03 14:10:00,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:00,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992939571] [2021-05-03 14:10:00,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:00,203 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:00,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992939571] [2021-05-03 14:10:00,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141256521] [2021-05-03 14:10:00,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:00,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:00,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:00,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:00,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:10:00,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400524317] [2021-05-03 14:10:00,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:10:00,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:00,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:10:00,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:10:00,262 INFO L87 Difference]: Start difference. First operand 33433 states and 115039 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:00,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:00,691 INFO L93 Difference]: Finished difference Result 40272 states and 136673 transitions. [2021-05-03 14:10:00,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:10:00,692 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:00,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:00,776 INFO L225 Difference]: With dead ends: 40272 [2021-05-03 14:10:00,777 INFO L226 Difference]: Without dead ends: 40272 [2021-05-03 14:10:00,777 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 166.0ms TimeCoverageRelationStatistics Valid=325, Invalid=605, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:10:00,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40272 states. [2021-05-03 14:10:01,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40272 to 29596. [2021-05-03 14:10:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29596 states, 29595 states have (on average 3.431120121642169) internal successors, (101544), 29595 states have internal predecessors, (101544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:01,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29596 states to 29596 states and 101544 transitions. [2021-05-03 14:10:01,374 INFO L78 Accepts]: Start accepts. Automaton has 29596 states and 101544 transitions. Word has length 22 [2021-05-03 14:10:01,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:01,374 INFO L480 AbstractCegarLoop]: Abstraction has 29596 states and 101544 transitions. [2021-05-03 14:10:01,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:01,374 INFO L276 IsEmpty]: Start isEmpty. Operand 29596 states and 101544 transitions. [2021-05-03 14:10:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:01,382 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:01,382 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:01,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24635 [2021-05-03 14:10:01,582 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:01,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:01,582 INFO L82 PathProgramCache]: Analyzing trace with hash 416802943, now seen corresponding path program 218 times [2021-05-03 14:10:01,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:01,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571389388] [2021-05-03 14:10:01,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:01,655 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:01,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571389388] [2021-05-03 14:10:01,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794155881] [2021-05-03 14:10:01,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:01,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:01,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:01,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:01,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:01,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:01,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:10:01,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221855475] [2021-05-03 14:10:01,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:10:01,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:01,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:10:01,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:10:01,712 INFO L87 Difference]: Start difference. First operand 29596 states and 101544 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:02,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:02,123 INFO L93 Difference]: Finished difference Result 30323 states and 103506 transitions. [2021-05-03 14:10:02,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:10:02,124 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:02,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:02,184 INFO L225 Difference]: With dead ends: 30323 [2021-05-03 14:10:02,184 INFO L226 Difference]: Without dead ends: 30317 [2021-05-03 14:10:02,184 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:10:02,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30317 states. [2021-05-03 14:10:02,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30317 to 29652. [2021-05-03 14:10:02,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29652 states, 29651 states have (on average 3.4303058918754847) internal successors, (101712), 29651 states have internal predecessors, (101712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29652 states to 29652 states and 101712 transitions. [2021-05-03 14:10:02,851 INFO L78 Accepts]: Start accepts. Automaton has 29652 states and 101712 transitions. Word has length 22 [2021-05-03 14:10:02,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:02,852 INFO L480 AbstractCegarLoop]: Abstraction has 29652 states and 101712 transitions. [2021-05-03 14:10:02,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:02,852 INFO L276 IsEmpty]: Start isEmpty. Operand 29652 states and 101712 transitions. [2021-05-03 14:10:02,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:02,863 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:02,863 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:03,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24636 [2021-05-03 14:10:03,086 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:03,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:03,086 INFO L82 PathProgramCache]: Analyzing trace with hash 580800714, now seen corresponding path program 219 times [2021-05-03 14:10:03,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:03,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699263678] [2021-05-03 14:10:03,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:03,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699263678] [2021-05-03 14:10:03,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136693303] [2021-05-03 14:10:03,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-05-03 14:10:03,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:10:03,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:03,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:03,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:03,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:03,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:10:03,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551307823] [2021-05-03 14:10:03,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:10:03,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:03,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:10:03,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:10:03,255 INFO L87 Difference]: Start difference. First operand 29652 states and 101712 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:03,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:03,658 INFO L93 Difference]: Finished difference Result 34838 states and 118433 transitions. [2021-05-03 14:10:03,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:10:03,659 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:03,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:03,877 INFO L225 Difference]: With dead ends: 34838 [2021-05-03 14:10:03,877 INFO L226 Difference]: Without dead ends: 34838 [2021-05-03 14:10:03,877 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=453, Invalid=879, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:10:03,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34838 states. [2021-05-03 14:10:04,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34838 to 33690. [2021-05-03 14:10:04,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33690 states, 33689 states have (on average 3.4329603134554305) internal successors, (115653), 33689 states have internal predecessors, (115653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:04,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33690 states to 33690 states and 115653 transitions. [2021-05-03 14:10:04,552 INFO L78 Accepts]: Start accepts. Automaton has 33690 states and 115653 transitions. Word has length 22 [2021-05-03 14:10:04,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:04,552 INFO L480 AbstractCegarLoop]: Abstraction has 33690 states and 115653 transitions. [2021-05-03 14:10:04,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:04,553 INFO L276 IsEmpty]: Start isEmpty. Operand 33690 states and 115653 transitions. [2021-05-03 14:10:04,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:04,562 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:04,562 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:04,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24637,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:04,763 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:04,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:04,763 INFO L82 PathProgramCache]: Analyzing trace with hash 223235229, now seen corresponding path program 220 times [2021-05-03 14:10:04,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:04,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352096083] [2021-05-03 14:10:04,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 23 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:04,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352096083] [2021-05-03 14:10:04,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483543286] [2021-05-03 14:10:04,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:04,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:04,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:04,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:04,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:04,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:04,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:04,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095087753] [2021-05-03 14:10:04,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:04,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:04,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:04,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:04,899 INFO L87 Difference]: Start difference. First operand 33690 states and 115653 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:05,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:05,265 INFO L93 Difference]: Finished difference Result 34116 states and 116578 transitions. [2021-05-03 14:10:05,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:10:05,266 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:05,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:05,554 INFO L225 Difference]: With dead ends: 34116 [2021-05-03 14:10:05,555 INFO L226 Difference]: Without dead ends: 34111 [2021-05-03 14:10:05,555 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:10:05,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34111 states. [2021-05-03 14:10:06,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34111 to 33690. [2021-05-03 14:10:06,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33690 states, 33689 states have (on average 3.4328712636172045) internal successors, (115650), 33689 states have internal predecessors, (115650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:06,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33690 states to 33690 states and 115650 transitions. [2021-05-03 14:10:06,242 INFO L78 Accepts]: Start accepts. Automaton has 33690 states and 115650 transitions. Word has length 22 [2021-05-03 14:10:06,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:06,242 INFO L480 AbstractCegarLoop]: Abstraction has 33690 states and 115650 transitions. [2021-05-03 14:10:06,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:06,242 INFO L276 IsEmpty]: Start isEmpty. Operand 33690 states and 115650 transitions. [2021-05-03 14:10:06,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:06,254 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:06,254 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:06,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24638 [2021-05-03 14:10:06,469 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:06,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:06,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1538801078, now seen corresponding path program 221 times [2021-05-03 14:10:06,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:06,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746979415] [2021-05-03 14:10:06,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:06,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746979415] [2021-05-03 14:10:06,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331521621] [2021-05-03 14:10:06,546 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:06,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:10:06,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:06,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:06,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 18 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:06,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:06,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:06,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977675217] [2021-05-03 14:10:06,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:06,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:06,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:06,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:06,626 INFO L87 Difference]: Start difference. First operand 33690 states and 115650 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:06,991 INFO L93 Difference]: Finished difference Result 36368 states and 123286 transitions. [2021-05-03 14:10:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:10:06,992 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:06,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:07,281 INFO L225 Difference]: With dead ends: 36368 [2021-05-03 14:10:07,281 INFO L226 Difference]: Without dead ends: 36368 [2021-05-03 14:10:07,281 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:10:07,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36368 states. [2021-05-03 14:10:07,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36368 to 27032. [2021-05-03 14:10:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27032 states, 27031 states have (on average 3.4189634123783805) internal successors, (92418), 27031 states have internal predecessors, (92418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27032 states to 27032 states and 92418 transitions. [2021-05-03 14:10:07,954 INFO L78 Accepts]: Start accepts. Automaton has 27032 states and 92418 transitions. Word has length 22 [2021-05-03 14:10:07,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:07,954 INFO L480 AbstractCegarLoop]: Abstraction has 27032 states and 92418 transitions. [2021-05-03 14:10:07,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:07,954 INFO L276 IsEmpty]: Start isEmpty. Operand 27032 states and 92418 transitions. [2021-05-03 14:10:07,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:07,965 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:07,965 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:08,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24639,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:08,185 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:08,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:08,185 INFO L82 PathProgramCache]: Analyzing trace with hash -219663911, now seen corresponding path program 222 times [2021-05-03 14:10:08,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:08,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329346085] [2021-05-03 14:10:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:08,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329346085] [2021-05-03 14:10:08,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007518250] [2021-05-03 14:10:08,273 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:08,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:10:08,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:08,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:08,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:08,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:08,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:08,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575770883] [2021-05-03 14:10:08,369 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:08,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:08,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:08,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:08,369 INFO L87 Difference]: Start difference. First operand 27032 states and 92418 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:08,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:08,811 INFO L93 Difference]: Finished difference Result 27914 states and 94767 transitions. [2021-05-03 14:10:08,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:10:08,811 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:08,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:08,887 INFO L225 Difference]: With dead ends: 27914 [2021-05-03 14:10:08,887 INFO L226 Difference]: Without dead ends: 27908 [2021-05-03 14:10:08,888 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 224.4ms TimeCoverageRelationStatistics Valid=348, Invalid=708, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:10:08,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27908 states. [2021-05-03 14:10:09,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27908 to 27045. [2021-05-03 14:10:09,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27045 states, 27044 states have (on average 3.419168762017453) internal successors, (92468), 27044 states have internal predecessors, (92468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27045 states to 27045 states and 92468 transitions. [2021-05-03 14:10:09,646 INFO L78 Accepts]: Start accepts. Automaton has 27045 states and 92468 transitions. Word has length 22 [2021-05-03 14:10:09,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:09,646 INFO L480 AbstractCegarLoop]: Abstraction has 27045 states and 92468 transitions. [2021-05-03 14:10:09,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:09,646 INFO L276 IsEmpty]: Start isEmpty. Operand 27045 states and 92468 transitions. [2021-05-03 14:10:09,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:09,656 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:09,656 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:09,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24640,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:09,877 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:09,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:09,877 INFO L82 PathProgramCache]: Analyzing trace with hash -55666140, now seen corresponding path program 223 times [2021-05-03 14:10:09,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:09,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085672910] [2021-05-03 14:10:09,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:09,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085672910] [2021-05-03 14:10:09,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477166369] [2021-05-03 14:10:09,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:09,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:09,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:10,048 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:10,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:10,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:10,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719683232] [2021-05-03 14:10:10,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:10,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:10,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:10,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:10,049 INFO L87 Difference]: Start difference. First operand 27045 states and 92468 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:10,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:10,428 INFO L93 Difference]: Finished difference Result 32148 states and 108873 transitions. [2021-05-03 14:10:10,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:10:10,437 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:10,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:10,509 INFO L225 Difference]: With dead ends: 32148 [2021-05-03 14:10:10,509 INFO L226 Difference]: Without dead ends: 32148 [2021-05-03 14:10:10,509 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 252.4ms TimeCoverageRelationStatistics Valid=399, Invalid=791, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:10:10,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32148 states. [2021-05-03 14:10:11,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32148 to 25053. [2021-05-03 14:10:11,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25053 states, 25052 states have (on average 3.419726967906754) internal successors, (85671), 25052 states have internal predecessors, (85671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25053 states to 25053 states and 85671 transitions. [2021-05-03 14:10:11,271 INFO L78 Accepts]: Start accepts. Automaton has 25053 states and 85671 transitions. Word has length 22 [2021-05-03 14:10:11,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:11,271 INFO L480 AbstractCegarLoop]: Abstraction has 25053 states and 85671 transitions. [2021-05-03 14:10:11,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:11,271 INFO L276 IsEmpty]: Start isEmpty. Operand 25053 states and 85671 transitions. [2021-05-03 14:10:11,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:11,280 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:11,281 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:11,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24641 [2021-05-03 14:10:11,509 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:11,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:11,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1064635363, now seen corresponding path program 224 times [2021-05-03 14:10:11,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:11,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838258253] [2021-05-03 14:10:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:11,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:11,628 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:11,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838258253] [2021-05-03 14:10:11,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383182815] [2021-05-03 14:10:11,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:11,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:11,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:11,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:11,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:11,702 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:11,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:11,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:11,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866420965] [2021-05-03 14:10:11,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:11,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:11,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:11,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:11,703 INFO L87 Difference]: Start difference. First operand 25053 states and 85671 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:12,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:12,074 INFO L93 Difference]: Finished difference Result 25874 states and 87890 transitions. [2021-05-03 14:10:12,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:10:12,075 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:12,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:12,139 INFO L225 Difference]: With dead ends: 25874 [2021-05-03 14:10:12,140 INFO L226 Difference]: Without dead ends: 25867 [2021-05-03 14:10:12,141 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=349, Invalid=707, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:10:12,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25867 states. [2021-05-03 14:10:12,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25867 to 25080. [2021-05-03 14:10:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25080 states, 25079 states have (on average 3.419474460704175) internal successors, (85757), 25079 states have internal predecessors, (85757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:12,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25080 states to 25080 states and 85757 transitions. [2021-05-03 14:10:12,910 INFO L78 Accepts]: Start accepts. Automaton has 25080 states and 85757 transitions. Word has length 22 [2021-05-03 14:10:12,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:12,911 INFO L480 AbstractCegarLoop]: Abstraction has 25080 states and 85757 transitions. [2021-05-03 14:10:12,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:12,911 INFO L276 IsEmpty]: Start isEmpty. Operand 25080 states and 85757 transitions. [2021-05-03 14:10:12,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:12,920 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:12,920 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:13,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24642 [2021-05-03 14:10:13,133 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:13,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:13,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1323123318, now seen corresponding path program 225 times [2021-05-03 14:10:13,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:13,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399791654] [2021-05-03 14:10:13,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:13,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:13,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399791654] [2021-05-03 14:10:13,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565150764] [2021-05-03 14:10:13,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:13,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:10:13,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:13,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:13,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:13,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:13,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:13,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710342921] [2021-05-03 14:10:13,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:13,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:13,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:13,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:13,311 INFO L87 Difference]: Start difference. First operand 25080 states and 85757 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:13,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:13,823 INFO L93 Difference]: Finished difference Result 27927 states and 94333 transitions. [2021-05-03 14:10:13,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 14:10:13,824 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:13,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:13,895 INFO L225 Difference]: With dead ends: 27927 [2021-05-03 14:10:13,896 INFO L226 Difference]: Without dead ends: 27927 [2021-05-03 14:10:13,896 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 355.7ms TimeCoverageRelationStatistics Valid=642, Invalid=1250, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 14:10:13,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27927 states. [2021-05-03 14:10:14,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27927 to 25274. [2021-05-03 14:10:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25274 states, 25273 states have (on average 3.42104221896886) internal successors, (86460), 25273 states have internal predecessors, (86460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:14,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25274 states to 25274 states and 86460 transitions. [2021-05-03 14:10:14,502 INFO L78 Accepts]: Start accepts. Automaton has 25274 states and 86460 transitions. Word has length 22 [2021-05-03 14:10:14,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:14,502 INFO L480 AbstractCegarLoop]: Abstraction has 25274 states and 86460 transitions. [2021-05-03 14:10:14,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:14,502 INFO L276 IsEmpty]: Start isEmpty. Operand 25274 states and 86460 transitions. [2021-05-03 14:10:14,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:14,512 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:14,512 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:14,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24643 [2021-05-03 14:10:14,730 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:14,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:14,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1967599235, now seen corresponding path program 226 times [2021-05-03 14:10:14,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:14,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827397912] [2021-05-03 14:10:14,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:14,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 24 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:14,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827397912] [2021-05-03 14:10:14,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015809258] [2021-05-03 14:10:14,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:15,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:15,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:15,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:15,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 25 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:15,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:15,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:15,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899840661] [2021-05-03 14:10:15,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:15,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:15,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:15,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:15,174 INFO L87 Difference]: Start difference. First operand 25274 states and 86460 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:15,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:15,528 INFO L93 Difference]: Finished difference Result 27147 states and 92076 transitions. [2021-05-03 14:10:15,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:10:15,529 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:15,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:15,594 INFO L225 Difference]: With dead ends: 27147 [2021-05-03 14:10:15,594 INFO L226 Difference]: Without dead ends: 27142 [2021-05-03 14:10:15,595 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 180.9ms TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:15,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27142 states. [2021-05-03 14:10:16,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27142 to 25361. [2021-05-03 14:10:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25361 states, 25360 states have (on average 3.4214511041009463) internal successors, (86768), 25360 states have internal predecessors, (86768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:16,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25361 states to 25361 states and 86768 transitions. [2021-05-03 14:10:16,199 INFO L78 Accepts]: Start accepts. Automaton has 25361 states and 86768 transitions. Word has length 22 [2021-05-03 14:10:16,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:16,199 INFO L480 AbstractCegarLoop]: Abstraction has 25361 states and 86768 transitions. [2021-05-03 14:10:16,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:16,199 INFO L276 IsEmpty]: Start isEmpty. Operand 25361 states and 86768 transitions. [2021-05-03 14:10:16,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:16,209 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:16,209 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:16,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24644 [2021-05-03 14:10:16,423 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:16,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:16,424 INFO L82 PathProgramCache]: Analyzing trace with hash 205562928, now seen corresponding path program 227 times [2021-05-03 14:10:16,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:16,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752747233] [2021-05-03 14:10:16,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:16,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752747233] [2021-05-03 14:10:16,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915552407] [2021-05-03 14:10:16,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:10:16,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:10:16,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:16,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:16,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:16,594 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:16,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:16,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:16,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703737998] [2021-05-03 14:10:16,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:16,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:16,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:16,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:16,595 INFO L87 Difference]: Start difference. First operand 25361 states and 86768 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:16,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:16,906 INFO L93 Difference]: Finished difference Result 27451 states and 92974 transitions. [2021-05-03 14:10:16,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:10:16,907 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:16,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:17,152 INFO L225 Difference]: With dead ends: 27451 [2021-05-03 14:10:17,152 INFO L226 Difference]: Without dead ends: 27451 [2021-05-03 14:10:17,152 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:10:17,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27451 states. [2021-05-03 14:10:17,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27451 to 24554. [2021-05-03 14:10:17,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24554 states, 24553 states have (on average 3.42544699222091) internal successors, (84105), 24553 states have internal predecessors, (84105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:17,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24554 states to 24554 states and 84105 transitions. [2021-05-03 14:10:17,633 INFO L78 Accepts]: Start accepts. Automaton has 24554 states and 84105 transitions. Word has length 22 [2021-05-03 14:10:17,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:17,634 INFO L480 AbstractCegarLoop]: Abstraction has 24554 states and 84105 transitions. [2021-05-03 14:10:17,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:17,634 INFO L276 IsEmpty]: Start isEmpty. Operand 24554 states and 84105 transitions. [2021-05-03 14:10:17,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:17,643 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:17,643 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:17,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24645 [2021-05-03 14:10:17,866 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:17,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:17,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1524700095, now seen corresponding path program 228 times [2021-05-03 14:10:17,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:17,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989891773] [2021-05-03 14:10:17,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:17,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:17,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989891773] [2021-05-03 14:10:17,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230164801] [2021-05-03 14:10:17,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:17,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:10:17,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:17,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:17,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:18,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:18,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:18,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95275662] [2021-05-03 14:10:18,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:18,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:18,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:18,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:18,049 INFO L87 Difference]: Start difference. First operand 24554 states and 84105 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:18,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:18,332 INFO L93 Difference]: Finished difference Result 25024 states and 85353 transitions. [2021-05-03 14:10:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:10:18,333 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:18,406 INFO L225 Difference]: With dead ends: 25024 [2021-05-03 14:10:18,406 INFO L226 Difference]: Without dead ends: 25018 [2021-05-03 14:10:18,406 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:18,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25018 states. [2021-05-03 14:10:18,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25018 to 24554. [2021-05-03 14:10:19,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24554 states, 24553 states have (on average 3.4254062640003258) internal successors, (84104), 24553 states have internal predecessors, (84104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:19,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24554 states to 24554 states and 84104 transitions. [2021-05-03 14:10:19,077 INFO L78 Accepts]: Start accepts. Automaton has 24554 states and 84104 transitions. Word has length 22 [2021-05-03 14:10:19,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:19,077 INFO L480 AbstractCegarLoop]: Abstraction has 24554 states and 84104 transitions. [2021-05-03 14:10:19,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:19,078 INFO L276 IsEmpty]: Start isEmpty. Operand 24554 states and 84104 transitions. [2021-05-03 14:10:19,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:19,087 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:19,087 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:19,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24646 [2021-05-03 14:10:19,307 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:19,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1688697866, now seen corresponding path program 229 times [2021-05-03 14:10:19,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:19,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228569485] [2021-05-03 14:10:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:19,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228569485] [2021-05-03 14:10:19,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66116656] [2021-05-03 14:10:19,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:10:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:19,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:19,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:19,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:19,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:19,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145248980] [2021-05-03 14:10:19,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:19,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:19,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:19,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:19,482 INFO L87 Difference]: Start difference. First operand 24554 states and 84104 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:19,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:19,779 INFO L93 Difference]: Finished difference Result 25874 states and 87934 transitions. [2021-05-03 14:10:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:10:19,780 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:19,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:19,847 INFO L225 Difference]: With dead ends: 25874 [2021-05-03 14:10:19,847 INFO L226 Difference]: Without dead ends: 25874 [2021-05-03 14:10:19,848 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:10:19,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25874 states. [2021-05-03 14:10:20,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25874 to 24995. [2021-05-03 14:10:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24995 states, 24994 states have (on average 3.425342082099704) internal successors, (85613), 24994 states have internal predecessors, (85613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:20,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24995 states to 24995 states and 85613 transitions. [2021-05-03 14:10:20,419 INFO L78 Accepts]: Start accepts. Automaton has 24995 states and 85613 transitions. Word has length 22 [2021-05-03 14:10:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:20,419 INFO L480 AbstractCegarLoop]: Abstraction has 24995 states and 85613 transitions. [2021-05-03 14:10:20,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 24995 states and 85613 transitions. [2021-05-03 14:10:20,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:20,428 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:20,429 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:20,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24647 [2021-05-03 14:10:20,629 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:20,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:20,629 INFO L82 PathProgramCache]: Analyzing trace with hash 679728643, now seen corresponding path program 230 times [2021-05-03 14:10:20,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:20,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493326074] [2021-05-03 14:10:20,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:20,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493326074] [2021-05-03 14:10:20,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869299390] [2021-05-03 14:10:20,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:10:20,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:20,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:20,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:20,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:20,990 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:20,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:20,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:20,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932726049] [2021-05-03 14:10:20,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:20,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:20,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:20,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:20,991 INFO L87 Difference]: Start difference. First operand 24995 states and 85613 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:21,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:21,266 INFO L93 Difference]: Finished difference Result 25438 states and 86795 transitions. [2021-05-03 14:10:21,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:10:21,267 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:21,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:21,338 INFO L225 Difference]: With dead ends: 25438 [2021-05-03 14:10:21,338 INFO L226 Difference]: Without dead ends: 25431 [2021-05-03 14:10:21,338 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:21,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25431 states. [2021-05-03 14:10:21,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25431 to 24995. [2021-05-03 14:10:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24995 states, 24994 states have (on average 3.4253020724973995) internal successors, (85612), 24994 states have internal predecessors, (85612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:21,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24995 states to 24995 states and 85612 transitions. [2021-05-03 14:10:21,889 INFO L78 Accepts]: Start accepts. Automaton has 24995 states and 85612 transitions. Word has length 22 [2021-05-03 14:10:21,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:21,889 INFO L480 AbstractCegarLoop]: Abstraction has 24995 states and 85612 transitions. [2021-05-03 14:10:21,889 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:21,889 INFO L276 IsEmpty]: Start isEmpty. Operand 24995 states and 85612 transitions. [2021-05-03 14:10:21,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:21,899 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:21,899 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:22,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24648 [2021-05-03 14:10:22,121 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:22,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:22,121 INFO L82 PathProgramCache]: Analyzing trace with hash 421240688, now seen corresponding path program 231 times [2021-05-03 14:10:22,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:22,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803881049] [2021-05-03 14:10:22,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:22,216 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:22,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803881049] [2021-05-03 14:10:22,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553317175] [2021-05-03 14:10:22,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:22,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:10:22,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:22,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:22,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:22,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:22,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:22,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289877898] [2021-05-03 14:10:22,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:22,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:22,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:22,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:22,309 INFO L87 Difference]: Start difference. First operand 24995 states and 85612 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:22,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:22,725 INFO L93 Difference]: Finished difference Result 25599 states and 86951 transitions. [2021-05-03 14:10:22,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:10:22,728 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:22,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:23,031 INFO L225 Difference]: With dead ends: 25599 [2021-05-03 14:10:23,031 INFO L226 Difference]: Without dead ends: 25599 [2021-05-03 14:10:23,032 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 305.8ms TimeCoverageRelationStatistics Valid=518, Invalid=1042, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 14:10:23,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25599 states. [2021-05-03 14:10:23,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25599 to 25031. [2021-05-03 14:10:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25031 states, 25030 states have (on average 3.4251298441869755) internal successors, (85731), 25030 states have internal predecessors, (85731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25031 states to 25031 states and 85731 transitions. [2021-05-03 14:10:23,619 INFO L78 Accepts]: Start accepts. Automaton has 25031 states and 85731 transitions. Word has length 22 [2021-05-03 14:10:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:23,619 INFO L480 AbstractCegarLoop]: Abstraction has 25031 states and 85731 transitions. [2021-05-03 14:10:23,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:23,619 INFO L276 IsEmpty]: Start isEmpty. Operand 25031 states and 85731 transitions. [2021-05-03 14:10:23,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:23,629 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:23,629 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:23,850 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24649 [2021-05-03 14:10:23,851 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:23,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:23,851 INFO L82 PathProgramCache]: Analyzing trace with hash 255417407, now seen corresponding path program 232 times [2021-05-03 14:10:23,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:23,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099035826] [2021-05-03 14:10:23,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:23,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099035826] [2021-05-03 14:10:23,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589738578] [2021-05-03 14:10:23,967 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:23,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:23,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:23,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:23,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:24,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:24,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:24,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335652686] [2021-05-03 14:10:24,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:24,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:24,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:24,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:24,074 INFO L87 Difference]: Start difference. First operand 25031 states and 85731 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:24,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:24,368 INFO L93 Difference]: Finished difference Result 25442 states and 86842 transitions. [2021-05-03 14:10:24,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:10:24,368 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:24,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:24,435 INFO L225 Difference]: With dead ends: 25442 [2021-05-03 14:10:24,435 INFO L226 Difference]: Without dead ends: 25434 [2021-05-03 14:10:24,435 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 216.2ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25434 states. [2021-05-03 14:10:25,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25434 to 25031. [2021-05-03 14:10:25,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25031 states, 25030 states have (on average 3.425089892129445) internal successors, (85730), 25030 states have internal predecessors, (85730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:25,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25031 states to 25031 states and 85730 transitions. [2021-05-03 14:10:25,118 INFO L78 Accepts]: Start accepts. Automaton has 25031 states and 85730 transitions. Word has length 22 [2021-05-03 14:10:25,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:25,118 INFO L480 AbstractCegarLoop]: Abstraction has 25031 states and 85730 transitions. [2021-05-03 14:10:25,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:25,118 INFO L276 IsEmpty]: Start isEmpty. Operand 25031 states and 85730 transitions. [2021-05-03 14:10:25,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:25,128 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:25,128 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:25,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24650,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:25,349 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:25,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:25,349 INFO L82 PathProgramCache]: Analyzing trace with hash -215226166, now seen corresponding path program 233 times [2021-05-03 14:10:25,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:25,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362812260] [2021-05-03 14:10:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:25,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:25,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362812260] [2021-05-03 14:10:25,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630734996] [2021-05-03 14:10:25,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:25,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:10:25,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:25,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:25,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:25,528 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:25,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:25,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:25,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177726150] [2021-05-03 14:10:25,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:25,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:25,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:25,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:25,529 INFO L87 Difference]: Start difference. First operand 25031 states and 85730 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:26,094 INFO L93 Difference]: Finished difference Result 25692 states and 87163 transitions. [2021-05-03 14:10:26,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 14:10:26,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:26,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:26,160 INFO L225 Difference]: With dead ends: 25692 [2021-05-03 14:10:26,160 INFO L226 Difference]: Without dead ends: 25692 [2021-05-03 14:10:26,160 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 420.2ms TimeCoverageRelationStatistics Valid=753, Invalid=1503, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 14:10:26,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25692 states. [2021-05-03 14:10:26,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25692 to 25022. [2021-05-03 14:10:26,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25022 states, 25021 states have (on average 3.4252427960513168) internal successors, (85703), 25021 states have internal predecessors, (85703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:26,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25022 states to 25022 states and 85703 transitions. [2021-05-03 14:10:26,928 INFO L78 Accepts]: Start accepts. Automaton has 25022 states and 85703 transitions. Word has length 22 [2021-05-03 14:10:26,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:26,928 INFO L480 AbstractCegarLoop]: Abstraction has 25022 states and 85703 transitions. [2021-05-03 14:10:26,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:26,928 INFO L276 IsEmpty]: Start isEmpty. Operand 25022 states and 85703 transitions. [2021-05-03 14:10:26,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:26,937 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:26,937 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:27,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24651,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:27,159 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:27,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:27,159 INFO L82 PathProgramCache]: Analyzing trace with hash -457840953, now seen corresponding path program 234 times [2021-05-03 14:10:27,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:27,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108598452] [2021-05-03 14:10:27,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:27,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108598452] [2021-05-03 14:10:27,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485216039] [2021-05-03 14:10:27,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:10:27,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:10:27,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:27,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:27,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:27,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:27,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:10:27,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85876972] [2021-05-03 14:10:27,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:27,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:27,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:27,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:27,309 INFO L87 Difference]: Start difference. First operand 25022 states and 85703 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:27,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:27,511 INFO L93 Difference]: Finished difference Result 25353 states and 86224 transitions. [2021-05-03 14:10:27,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:10:27,511 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:27,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:27,576 INFO L225 Difference]: With dead ends: 25353 [2021-05-03 14:10:27,576 INFO L226 Difference]: Without dead ends: 25353 [2021-05-03 14:10:27,576 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=119, Invalid=153, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:27,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25353 states. [2021-05-03 14:10:28,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25353 to 25033. [2021-05-03 14:10:28,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25033 states, 25032 states have (on average 3.4251757750079896) internal successors, (85739), 25032 states have internal predecessors, (85739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:28,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25033 states to 25033 states and 85739 transitions. [2021-05-03 14:10:28,152 INFO L78 Accepts]: Start accepts. Automaton has 25033 states and 85739 transitions. Word has length 22 [2021-05-03 14:10:28,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:28,152 INFO L480 AbstractCegarLoop]: Abstraction has 25033 states and 85739 transitions. [2021-05-03 14:10:28,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:28,153 INFO L276 IsEmpty]: Start isEmpty. Operand 25033 states and 85739 transitions. [2021-05-03 14:10:28,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:28,162 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:28,162 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:28,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24652,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:28,383 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:28,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:28,383 INFO L82 PathProgramCache]: Analyzing trace with hash 625449180, now seen corresponding path program 235 times [2021-05-03 14:10:28,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:28,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145395514] [2021-05-03 14:10:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:28,512 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:28,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145395514] [2021-05-03 14:10:28,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530030196] [2021-05-03 14:10:28,513 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:28,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:28,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:28,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:28,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:28,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:10:28,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926801461] [2021-05-03 14:10:28,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:28,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:28,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:28,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:28,575 INFO L87 Difference]: Start difference. First operand 25033 states and 85739 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:29,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:29,161 INFO L93 Difference]: Finished difference Result 25371 states and 86392 transitions. [2021-05-03 14:10:29,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:10:29,162 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:29,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:29,224 INFO L225 Difference]: With dead ends: 25371 [2021-05-03 14:10:29,224 INFO L226 Difference]: Without dead ends: 25367 [2021-05-03 14:10:29,224 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:10:29,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25367 states. [2021-05-03 14:10:29,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25367 to 25136. [2021-05-03 14:10:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25136 states, 25135 states have (on average 3.4247065844440026) internal successors, (86080), 25135 states have internal predecessors, (86080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:29,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25136 states to 25136 states and 86080 transitions. [2021-05-03 14:10:29,738 INFO L78 Accepts]: Start accepts. Automaton has 25136 states and 86080 transitions. Word has length 22 [2021-05-03 14:10:29,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:29,739 INFO L480 AbstractCegarLoop]: Abstraction has 25136 states and 86080 transitions. [2021-05-03 14:10:29,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:29,739 INFO L276 IsEmpty]: Start isEmpty. Operand 25136 states and 86080 transitions. [2021-05-03 14:10:29,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:29,748 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:29,748 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:29,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24653 [2021-05-03 14:10:29,952 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:29,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:29,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1282251357, now seen corresponding path program 236 times [2021-05-03 14:10:29,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:29,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893163591] [2021-05-03 14:10:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:30,031 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:30,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893163591] [2021-05-03 14:10:30,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475523677] [2021-05-03 14:10:30,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:10:30,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:30,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:30,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:30,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:30,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:30,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:10:30,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820867428] [2021-05-03 14:10:30,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:30,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:30,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:30,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:30,097 INFO L87 Difference]: Start difference. First operand 25136 states and 86080 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:30,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:30,403 INFO L93 Difference]: Finished difference Result 25448 states and 86549 transitions. [2021-05-03 14:10:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:10:30,404 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:30,471 INFO L225 Difference]: With dead ends: 25448 [2021-05-03 14:10:30,471 INFO L226 Difference]: Without dead ends: 25447 [2021-05-03 14:10:30,471 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:10:30,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25447 states. [2021-05-03 14:10:31,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25447 to 25136. [2021-05-03 14:10:31,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25136 states, 25135 states have (on average 3.424070021881838) internal successors, (86064), 25135 states have internal predecessors, (86064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:31,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25136 states to 25136 states and 86064 transitions. [2021-05-03 14:10:31,220 INFO L78 Accepts]: Start accepts. Automaton has 25136 states and 86064 transitions. Word has length 22 [2021-05-03 14:10:31,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:31,221 INFO L480 AbstractCegarLoop]: Abstraction has 25136 states and 86064 transitions. [2021-05-03 14:10:31,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:31,221 INFO L276 IsEmpty]: Start isEmpty. Operand 25136 states and 86064 transitions. [2021-05-03 14:10:31,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:31,229 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:31,229 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:31,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24654,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:31,450 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:31,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:31,451 INFO L82 PathProgramCache]: Analyzing trace with hash -2090297206, now seen corresponding path program 237 times [2021-05-03 14:10:31,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:31,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862283410] [2021-05-03 14:10:31,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:31,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:31,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862283410] [2021-05-03 14:10:31,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088196233] [2021-05-03 14:10:31,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:31,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:10:31,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:31,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:31,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:31,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:31,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:10:31,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462572156] [2021-05-03 14:10:31,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:31,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:31,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:31,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:31,596 INFO L87 Difference]: Start difference. First operand 25136 states and 86064 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:31,808 INFO L93 Difference]: Finished difference Result 25635 states and 87128 transitions. [2021-05-03 14:10:31,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:10:31,809 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:31,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:31,876 INFO L225 Difference]: With dead ends: 25635 [2021-05-03 14:10:31,876 INFO L226 Difference]: Without dead ends: 25635 [2021-05-03 14:10:31,876 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:10:31,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25635 states. [2021-05-03 14:10:32,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25635 to 25162. [2021-05-03 14:10:32,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25162 states, 25161 states have (on average 3.4235920670879536) internal successors, (86141), 25161 states have internal predecessors, (86141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:32,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25162 states to 25162 states and 86141 transitions. [2021-05-03 14:10:32,453 INFO L78 Accepts]: Start accepts. Automaton has 25162 states and 86141 transitions. Word has length 22 [2021-05-03 14:10:32,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:32,453 INFO L480 AbstractCegarLoop]: Abstraction has 25162 states and 86141 transitions. [2021-05-03 14:10:32,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 25162 states and 86141 transitions. [2021-05-03 14:10:32,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:32,462 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:32,462 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:32,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24655 [2021-05-03 14:10:32,677 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:32,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:32,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1302102631, now seen corresponding path program 238 times [2021-05-03 14:10:32,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:32,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785804073] [2021-05-03 14:10:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:32,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:32,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785804073] [2021-05-03 14:10:32,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519319579] [2021-05-03 14:10:32,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:32,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:32,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:32,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:32,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:33,033 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:33,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:33,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:10:33,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201681939] [2021-05-03 14:10:33,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:10:33,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:33,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:10:33,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:10:33,034 INFO L87 Difference]: Start difference. First operand 25162 states and 86141 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:33,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:33,374 INFO L93 Difference]: Finished difference Result 25479 states and 86617 transitions. [2021-05-03 14:10:33,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:10:33,375 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:33,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:33,444 INFO L225 Difference]: With dead ends: 25479 [2021-05-03 14:10:33,444 INFO L226 Difference]: Without dead ends: 25477 [2021-05-03 14:10:33,444 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 363.0ms TimeCoverageRelationStatistics Valid=274, Invalid=482, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:33,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25477 states. [2021-05-03 14:10:33,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25477 to 25162. [2021-05-03 14:10:33,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25162 states, 25161 states have (on average 3.4234728349429675) internal successors, (86138), 25161 states have internal predecessors, (86138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25162 states to 25162 states and 86138 transitions. [2021-05-03 14:10:33,994 INFO L78 Accepts]: Start accepts. Automaton has 25162 states and 86138 transitions. Word has length 22 [2021-05-03 14:10:33,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:33,994 INFO L480 AbstractCegarLoop]: Abstraction has 25162 states and 86138 transitions. [2021-05-03 14:10:33,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:33,994 INFO L276 IsEmpty]: Start isEmpty. Operand 25162 states and 86138 transitions. [2021-05-03 14:10:34,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:34,003 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:34,003 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:34,217 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24656 [2021-05-03 14:10:34,217 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:34,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:34,217 INFO L82 PathProgramCache]: Analyzing trace with hash 475622756, now seen corresponding path program 239 times [2021-05-03 14:10:34,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:34,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239710852] [2021-05-03 14:10:34,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:34,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239710852] [2021-05-03 14:10:34,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754942810] [2021-05-03 14:10:34,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:34,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:10:34,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:34,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:34,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 19 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:34,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:34,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:10:34,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304770072] [2021-05-03 14:10:34,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:10:34,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:34,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:10:34,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:10:34,393 INFO L87 Difference]: Start difference. First operand 25162 states and 86138 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:34,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:34,629 INFO L93 Difference]: Finished difference Result 25812 states and 87617 transitions. [2021-05-03 14:10:34,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:10:34,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:34,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:34,696 INFO L225 Difference]: With dead ends: 25812 [2021-05-03 14:10:34,696 INFO L226 Difference]: Without dead ends: 25812 [2021-05-03 14:10:34,696 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:10:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25812 states. [2021-05-03 14:10:35,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25812 to 25201. [2021-05-03 14:10:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25201 states, 25200 states have (on average 3.4220634920634923) internal successors, (86236), 25200 states have internal predecessors, (86236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:35,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25201 states to 25201 states and 86236 transitions. [2021-05-03 14:10:35,409 INFO L78 Accepts]: Start accepts. Automaton has 25201 states and 86236 transitions. Word has length 22 [2021-05-03 14:10:35,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:35,410 INFO L480 AbstractCegarLoop]: Abstraction has 25201 states and 86236 transitions. [2021-05-03 14:10:35,410 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:35,410 INFO L276 IsEmpty]: Start isEmpty. Operand 25201 states and 86236 transitions. [2021-05-03 14:10:35,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:35,420 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:35,420 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:35,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24657,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:35,641 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:35,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:35,641 INFO L82 PathProgramCache]: Analyzing trace with hash 187302365, now seen corresponding path program 240 times [2021-05-03 14:10:35,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:35,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777452995] [2021-05-03 14:10:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:35,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777452995] [2021-05-03 14:10:35,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37799062] [2021-05-03 14:10:35,723 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:35,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:10:35,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:35,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:35,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:35,804 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:35,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:35,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:10:35,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789782534] [2021-05-03 14:10:35,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:10:35,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:35,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:10:35,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:10:35,805 INFO L87 Difference]: Start difference. First operand 25201 states and 86236 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:36,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:36,112 INFO L93 Difference]: Finished difference Result 30537 states and 103865 transitions. [2021-05-03 14:10:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:10:36,112 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:36,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:36,193 INFO L225 Difference]: With dead ends: 30537 [2021-05-03 14:10:36,193 INFO L226 Difference]: Without dead ends: 30534 [2021-05-03 14:10:36,193 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:10:36,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30534 states. [2021-05-03 14:10:36,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30534 to 25737. [2021-05-03 14:10:36,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25737 states, 25736 states have (on average 3.426173453528132) internal successors, (88176), 25736 states have internal predecessors, (88176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:36,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25737 states to 25737 states and 88176 transitions. [2021-05-03 14:10:36,963 INFO L78 Accepts]: Start accepts. Automaton has 25737 states and 88176 transitions. Word has length 22 [2021-05-03 14:10:36,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:36,963 INFO L480 AbstractCegarLoop]: Abstraction has 25737 states and 88176 transitions. [2021-05-03 14:10:36,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:36,963 INFO L276 IsEmpty]: Start isEmpty. Operand 25737 states and 88176 transitions. [2021-05-03 14:10:36,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:36,973 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:36,973 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:37,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24658,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:37,174 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:37,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:37,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1585237046, now seen corresponding path program 241 times [2021-05-03 14:10:37,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:37,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492968724] [2021-05-03 14:10:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:37,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:37,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492968724] [2021-05-03 14:10:37,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62761390] [2021-05-03 14:10:37,256 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:37,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:37,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:37,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:37,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:10:37,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948348008] [2021-05-03 14:10:37,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:10:37,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:37,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:10:37,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:10:37,336 INFO L87 Difference]: Start difference. First operand 25737 states and 88176 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:37,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:37,566 INFO L93 Difference]: Finished difference Result 32821 states and 111446 transitions. [2021-05-03 14:10:37,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:10:37,566 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:37,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:37,646 INFO L225 Difference]: With dead ends: 32821 [2021-05-03 14:10:37,646 INFO L226 Difference]: Without dead ends: 32821 [2021-05-03 14:10:37,646 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:10:37,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32821 states. [2021-05-03 14:10:38,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32821 to 31903. [2021-05-03 14:10:38,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31903 states, 31902 states have (on average 3.4264622907654694) internal successors, (109311), 31902 states have internal predecessors, (109311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:38,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31903 states to 31903 states and 109311 transitions. [2021-05-03 14:10:38,601 INFO L78 Accepts]: Start accepts. Automaton has 31903 states and 109311 transitions. Word has length 22 [2021-05-03 14:10:38,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:38,601 INFO L480 AbstractCegarLoop]: Abstraction has 31903 states and 109311 transitions. [2021-05-03 14:10:38,601 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:38,602 INFO L276 IsEmpty]: Start isEmpty. Operand 31903 states and 109311 transitions. [2021-05-03 14:10:38,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:38,610 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:38,610 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:38,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24659 [2021-05-03 14:10:38,810 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:38,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:38,811 INFO L82 PathProgramCache]: Analyzing trace with hash -885783015, now seen corresponding path program 242 times [2021-05-03 14:10:38,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:38,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845655875] [2021-05-03 14:10:38,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:38,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:38,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845655875] [2021-05-03 14:10:38,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168724965] [2021-05-03 14:10:38,879 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:38,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:38,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:38,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:38,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:38,941 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:38,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:38,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:10:38,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331416617] [2021-05-03 14:10:38,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:10:38,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:38,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:10:38,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:10:38,942 INFO L87 Difference]: Start difference. First operand 31903 states and 109311 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:39,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:39,219 INFO L93 Difference]: Finished difference Result 35145 states and 119531 transitions. [2021-05-03 14:10:39,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:10:39,220 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:39,294 INFO L225 Difference]: With dead ends: 35145 [2021-05-03 14:10:39,294 INFO L226 Difference]: Without dead ends: 35141 [2021-05-03 14:10:39,295 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 130.6ms TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:10:39,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35141 states. [2021-05-03 14:10:39,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35141 to 31927. [2021-05-03 14:10:39,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31927 states, 31926 states have (on average 3.426423604585604) internal successors, (109392), 31926 states have internal predecessors, (109392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:40,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31927 states to 31927 states and 109392 transitions. [2021-05-03 14:10:40,272 INFO L78 Accepts]: Start accepts. Automaton has 31927 states and 109392 transitions. Word has length 22 [2021-05-03 14:10:40,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:40,272 INFO L480 AbstractCegarLoop]: Abstraction has 31927 states and 109392 transitions. [2021-05-03 14:10:40,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:40,272 INFO L276 IsEmpty]: Start isEmpty. Operand 31927 states and 109392 transitions. [2021-05-03 14:10:40,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:40,281 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:40,281 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:40,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24660,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:40,482 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:40,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:40,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1047381468, now seen corresponding path program 243 times [2021-05-03 14:10:40,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:40,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966568332] [2021-05-03 14:10:40,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:40,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966568332] [2021-05-03 14:10:40,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734421917] [2021-05-03 14:10:40,546 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:40,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:10:40,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:40,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:40,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:40,613 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:40,614 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:40,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:10:40,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713789250] [2021-05-03 14:10:40,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:10:40,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:40,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:10:40,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:10:40,614 INFO L87 Difference]: Start difference. First operand 31927 states and 109392 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:40,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:40,805 INFO L93 Difference]: Finished difference Result 34058 states and 115874 transitions. [2021-05-03 14:10:40,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:10:40,806 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:40,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:40,887 INFO L225 Difference]: With dead ends: 34058 [2021-05-03 14:10:40,887 INFO L226 Difference]: Without dead ends: 34058 [2021-05-03 14:10:40,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:10:40,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34058 states. [2021-05-03 14:10:41,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34058 to 33786. [2021-05-03 14:10:41,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33786 states, 33785 states have (on average 3.4163978096788514) internal successors, (115423), 33785 states have internal predecessors, (115423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:41,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33786 states to 33786 states and 115423 transitions. [2021-05-03 14:10:41,571 INFO L78 Accepts]: Start accepts. Automaton has 33786 states and 115423 transitions. Word has length 22 [2021-05-03 14:10:41,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:41,571 INFO L480 AbstractCegarLoop]: Abstraction has 33786 states and 115423 transitions. [2021-05-03 14:10:41,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:41,572 INFO L276 IsEmpty]: Start isEmpty. Operand 33786 states and 115423 transitions. [2021-05-03 14:10:41,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:41,583 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:41,583 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:41,805 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24661 [2021-05-03 14:10:41,805 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:41,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:41,806 INFO L82 PathProgramCache]: Analyzing trace with hash 208308573, now seen corresponding path program 244 times [2021-05-03 14:10:41,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:41,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848308663] [2021-05-03 14:10:41,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 27 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:41,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848308663] [2021-05-03 14:10:41,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555204169] [2021-05-03 14:10:41,905 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:41,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:41,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:41,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:41,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:41,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:41,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:41,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475471416] [2021-05-03 14:10:41,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:41,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:41,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:41,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:41,969 INFO L87 Difference]: Start difference. First operand 33786 states and 115423 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:42,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:42,510 INFO L93 Difference]: Finished difference Result 36935 states and 125285 transitions. [2021-05-03 14:10:42,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:10:42,520 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:42,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:42,615 INFO L225 Difference]: With dead ends: 36935 [2021-05-03 14:10:42,616 INFO L226 Difference]: Without dead ends: 36930 [2021-05-03 14:10:42,616 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36930 states. [2021-05-03 14:10:43,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36930 to 34131. [2021-05-03 14:10:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34131 states, 34130 states have (on average 3.4184295341341926) internal successors, (116671), 34130 states have internal predecessors, (116671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34131 states to 34131 states and 116671 transitions. [2021-05-03 14:10:43,334 INFO L78 Accepts]: Start accepts. Automaton has 34131 states and 116671 transitions. Word has length 22 [2021-05-03 14:10:43,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:43,334 INFO L480 AbstractCegarLoop]: Abstraction has 34131 states and 116671 transitions. [2021-05-03 14:10:43,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:43,334 INFO L276 IsEmpty]: Start isEmpty. Operand 34131 states and 116671 transitions. [2021-05-03 14:10:43,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:43,342 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:43,343 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:43,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24662,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:43,543 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:43,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:43,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1553727734, now seen corresponding path program 245 times [2021-05-03 14:10:43,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:43,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097672108] [2021-05-03 14:10:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:43,628 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:43,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097672108] [2021-05-03 14:10:43,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456044465] [2021-05-03 14:10:43,629 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:43,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:10:43,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:43,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:43,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:43,697 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:43,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:43,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:43,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45014070] [2021-05-03 14:10:43,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:43,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:43,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:43,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:43,698 INFO L87 Difference]: Start difference. First operand 34131 states and 116671 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:44,068 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-05-03 14:10:44,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:44,213 INFO L93 Difference]: Finished difference Result 34565 states and 117528 transitions. [2021-05-03 14:10:44,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:10:44,214 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:44,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:44,292 INFO L225 Difference]: With dead ends: 34565 [2021-05-03 14:10:44,292 INFO L226 Difference]: Without dead ends: 34565 [2021-05-03 14:10:44,292 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 401.8ms TimeCoverageRelationStatistics Valid=224, Invalid=426, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:10:44,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34565 states. [2021-05-03 14:10:44,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34565 to 34136. [2021-05-03 14:10:44,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34136 states, 34135 states have (on average 3.4178995166251647) internal successors, (116670), 34135 states have internal predecessors, (116670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:44,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34136 states to 34136 states and 116670 transitions. [2021-05-03 14:10:44,901 INFO L78 Accepts]: Start accepts. Automaton has 34136 states and 116670 transitions. Word has length 22 [2021-05-03 14:10:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:44,902 INFO L480 AbstractCegarLoop]: Abstraction has 34136 states and 116670 transitions. [2021-05-03 14:10:44,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:44,902 INFO L276 IsEmpty]: Start isEmpty. Operand 34136 states and 116670 transitions. [2021-05-03 14:10:44,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:44,910 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:44,910 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:45,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24663 [2021-05-03 14:10:45,110 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:45,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:45,111 INFO L82 PathProgramCache]: Analyzing trace with hash -234590567, now seen corresponding path program 246 times [2021-05-03 14:10:45,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:45,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320739143] [2021-05-03 14:10:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:45,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320739143] [2021-05-03 14:10:45,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487247411] [2021-05-03 14:10:45,202 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:45,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:10:45,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:45,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:45,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:45,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:45,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:45,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836061580] [2021-05-03 14:10:45,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:45,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:45,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:45,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:45,275 INFO L87 Difference]: Start difference. First operand 34136 states and 116670 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:46,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:46,003 INFO L93 Difference]: Finished difference Result 34685 states and 118130 transitions. [2021-05-03 14:10:46,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:10:46,003 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:46,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:46,073 INFO L225 Difference]: With dead ends: 34685 [2021-05-03 14:10:46,073 INFO L226 Difference]: Without dead ends: 34679 [2021-05-03 14:10:46,074 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:46,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34679 states. [2021-05-03 14:10:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34679 to 34136. [2021-05-03 14:10:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34136 states, 34135 states have (on average 3.4178702211806065) internal successors, (116669), 34135 states have internal predecessors, (116669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34136 states to 34136 states and 116669 transitions. [2021-05-03 14:10:46,735 INFO L78 Accepts]: Start accepts. Automaton has 34136 states and 116669 transitions. Word has length 22 [2021-05-03 14:10:46,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:46,735 INFO L480 AbstractCegarLoop]: Abstraction has 34136 states and 116669 transitions. [2021-05-03 14:10:46,735 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:46,735 INFO L276 IsEmpty]: Start isEmpty. Operand 34136 states and 116669 transitions. [2021-05-03 14:10:46,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:46,743 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:46,743 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:46,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24664,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:46,945 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:46,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:46,945 INFO L82 PathProgramCache]: Analyzing trace with hash -70592796, now seen corresponding path program 247 times [2021-05-03 14:10:46,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:46,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039271011] [2021-05-03 14:10:46,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:47,019 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:47,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039271011] [2021-05-03 14:10:47,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777556257] [2021-05-03 14:10:47,019 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:47,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:47,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:47,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:47,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:47,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373415396] [2021-05-03 14:10:47,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:47,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:47,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:47,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:47,088 INFO L87 Difference]: Start difference. First operand 34136 states and 116669 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:47,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:47,350 INFO L93 Difference]: Finished difference Result 34892 states and 118662 transitions. [2021-05-03 14:10:47,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:10:47,350 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:47,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:47,728 INFO L225 Difference]: With dead ends: 34892 [2021-05-03 14:10:47,728 INFO L226 Difference]: Without dead ends: 34892 [2021-05-03 14:10:47,728 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:10:47,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34892 states. [2021-05-03 14:10:48,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34892 to 34647. [2021-05-03 14:10:48,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34647 states, 34646 states have (on average 3.412861513594643) internal successors, (118242), 34646 states have internal predecessors, (118242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:48,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34647 states to 34647 states and 118242 transitions. [2021-05-03 14:10:48,303 INFO L78 Accepts]: Start accepts. Automaton has 34647 states and 118242 transitions. Word has length 22 [2021-05-03 14:10:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:48,304 INFO L480 AbstractCegarLoop]: Abstraction has 34647 states and 118242 transitions. [2021-05-03 14:10:48,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 34647 states and 118242 transitions. [2021-05-03 14:10:48,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:48,314 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:48,314 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:48,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24665 [2021-05-03 14:10:48,515 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:48,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:48,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1079562019, now seen corresponding path program 248 times [2021-05-03 14:10:48,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:48,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405487270] [2021-05-03 14:10:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:48,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:48,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405487270] [2021-05-03 14:10:48,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624865091] [2021-05-03 14:10:48,601 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:48,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:48,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:48,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:48,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:48,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:48,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:48,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271497509] [2021-05-03 14:10:48,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:48,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:48,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:48,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:48,669 INFO L87 Difference]: Start difference. First operand 34647 states and 118242 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:48,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:48,940 INFO L93 Difference]: Finished difference Result 35167 states and 119631 transitions. [2021-05-03 14:10:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:10:48,940 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:48,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:49,022 INFO L225 Difference]: With dead ends: 35167 [2021-05-03 14:10:49,022 INFO L226 Difference]: Without dead ends: 35160 [2021-05-03 14:10:49,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:49,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35160 states. [2021-05-03 14:10:49,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35160 to 34647. [2021-05-03 14:10:49,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34647 states, 34646 states have (on average 3.4128326502337933) internal successors, (118241), 34646 states have internal predecessors, (118241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:49,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34647 states to 34647 states and 118241 transitions. [2021-05-03 14:10:49,906 INFO L78 Accepts]: Start accepts. Automaton has 34647 states and 118241 transitions. Word has length 22 [2021-05-03 14:10:49,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:49,906 INFO L480 AbstractCegarLoop]: Abstraction has 34647 states and 118241 transitions. [2021-05-03 14:10:49,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:49,906 INFO L276 IsEmpty]: Start isEmpty. Operand 34647 states and 118241 transitions. [2021-05-03 14:10:49,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:49,915 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:49,915 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:50,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24666 [2021-05-03 14:10:50,116 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:50,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:50,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1338049974, now seen corresponding path program 249 times [2021-05-03 14:10:50,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:50,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653380549] [2021-05-03 14:10:50,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:50,197 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:50,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653380549] [2021-05-03 14:10:50,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260943628] [2021-05-03 14:10:50,197 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:50,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:10:50,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:50,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:50,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:50,295 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:50,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:50,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:50,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321106680] [2021-05-03 14:10:50,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:50,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:50,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:50,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:50,297 INFO L87 Difference]: Start difference. First operand 34647 states and 118241 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:50,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:50,628 INFO L93 Difference]: Finished difference Result 35095 states and 119279 transitions. [2021-05-03 14:10:50,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:10:50,629 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:50,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:50,697 INFO L225 Difference]: With dead ends: 35095 [2021-05-03 14:10:50,698 INFO L226 Difference]: Without dead ends: 35095 [2021-05-03 14:10:50,698 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 223.3ms TimeCoverageRelationStatistics Valid=329, Invalid=727, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:10:50,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35095 states. [2021-05-03 14:10:51,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35095 to 34867. [2021-05-03 14:10:51,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34867 states, 34866 states have (on average 3.410342453966615) internal successors, (118905), 34866 states have internal predecessors, (118905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34867 states to 34867 states and 118905 transitions. [2021-05-03 14:10:51,483 INFO L78 Accepts]: Start accepts. Automaton has 34867 states and 118905 transitions. Word has length 22 [2021-05-03 14:10:51,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:51,483 INFO L480 AbstractCegarLoop]: Abstraction has 34867 states and 118905 transitions. [2021-05-03 14:10:51,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:51,484 INFO L276 IsEmpty]: Start isEmpty. Operand 34867 states and 118905 transitions. [2021-05-03 14:10:51,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:51,492 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:51,492 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:51,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24667 [2021-05-03 14:10:51,693 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:51,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:51,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1503873255, now seen corresponding path program 250 times [2021-05-03 14:10:51,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:51,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263860771] [2021-05-03 14:10:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:51,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:51,794 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:51,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263860771] [2021-05-03 14:10:51,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152776472] [2021-05-03 14:10:51,795 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 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:51,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:10:51,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:51,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:51,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:51,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:51,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:51,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878583707] [2021-05-03 14:10:51,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:51,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:51,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:51,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:51,875 INFO L87 Difference]: Start difference. First operand 34867 states and 118905 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:52,147 INFO L93 Difference]: Finished difference Result 35358 states and 120222 transitions. [2021-05-03 14:10:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:10:52,148 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:52,222 INFO L225 Difference]: With dead ends: 35358 [2021-05-03 14:10:52,222 INFO L226 Difference]: Without dead ends: 35350 [2021-05-03 14:10:52,223 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=234, Invalid=522, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:52,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35350 states. [2021-05-03 14:10:52,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35350 to 34867. [2021-05-03 14:10:52,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34867 states, 34866 states have (on average 3.41031377272988) internal successors, (118904), 34866 states have internal predecessors, (118904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:53,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34867 states to 34867 states and 118904 transitions. [2021-05-03 14:10:53,047 INFO L78 Accepts]: Start accepts. Automaton has 34867 states and 118904 transitions. Word has length 22 [2021-05-03 14:10:53,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:53,047 INFO L480 AbstractCegarLoop]: Abstraction has 34867 states and 118904 transitions. [2021-05-03 14:10:53,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:53,047 INFO L276 IsEmpty]: Start isEmpty. Operand 34867 states and 118904 transitions. [2021-05-03 14:10:53,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:53,056 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:53,056 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:53,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24668 [2021-05-03 14:10:53,257 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:53,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:53,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1974516828, now seen corresponding path program 251 times [2021-05-03 14:10:53,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:53,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633286367] [2021-05-03 14:10:53,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:53,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:53,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633286367] [2021-05-03 14:10:53,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452835392] [2021-05-03 14:10:53,354 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:53,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:10:53,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:53,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:53,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:53,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:53,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:53,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124181220] [2021-05-03 14:10:53,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:53,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:53,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:53,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:53,438 INFO L87 Difference]: Start difference. First operand 34867 states and 118904 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:53,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:53,968 INFO L93 Difference]: Finished difference Result 35266 states and 119729 transitions. [2021-05-03 14:10:53,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 14:10:53,970 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:53,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:54,067 INFO L225 Difference]: With dead ends: 35266 [2021-05-03 14:10:54,067 INFO L226 Difference]: Without dead ends: 35266 [2021-05-03 14:10:54,068 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 363.5ms TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:10:54,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35266 states. [2021-05-03 14:10:54,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35266 to 34965. [2021-05-03 14:10:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34965 states, 34964 states have (on average 3.409163711245853) internal successors, (119198), 34964 states have internal predecessors, (119198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:54,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34965 states to 34965 states and 119198 transitions. [2021-05-03 14:10:54,947 INFO L78 Accepts]: Start accepts. Automaton has 34965 states and 119198 transitions. Word has length 22 [2021-05-03 14:10:54,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:54,947 INFO L480 AbstractCegarLoop]: Abstraction has 34965 states and 119198 transitions. [2021-05-03 14:10:54,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:54,948 INFO L276 IsEmpty]: Start isEmpty. Operand 34965 states and 119198 transitions. [2021-05-03 14:10:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:54,957 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:54,957 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:55,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24669 [2021-05-03 14:10:55,158 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:55,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:55,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1772619683, now seen corresponding path program 252 times [2021-05-03 14:10:55,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:55,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782434067] [2021-05-03 14:10:55,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:55,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782434067] [2021-05-03 14:10:55,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154931376] [2021-05-03 14:10:55,253 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:55,285 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:10:55,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:55,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:55,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:55,345 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:55,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:55,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:55,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17803881] [2021-05-03 14:10:55,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:55,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:55,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:55,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:55,355 INFO L87 Difference]: Start difference. First operand 34965 states and 119198 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:55,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:55,718 INFO L93 Difference]: Finished difference Result 35421 states and 120437 transitions. [2021-05-03 14:10:55,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:10:55,719 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:55,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:55,805 INFO L225 Difference]: With dead ends: 35421 [2021-05-03 14:10:55,805 INFO L226 Difference]: Without dead ends: 35412 [2021-05-03 14:10:55,806 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=236, Invalid=520, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:10:55,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35412 states. [2021-05-03 14:10:56,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35412 to 34965. [2021-05-03 14:10:56,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34965 states, 34964 states have (on average 3.409135110399268) internal successors, (119197), 34964 states have internal predecessors, (119197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:56,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34965 states to 34965 states and 119197 transitions. [2021-05-03 14:10:56,648 INFO L78 Accepts]: Start accepts. Automaton has 34965 states and 119197 transitions. Word has length 22 [2021-05-03 14:10:56,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:56,648 INFO L480 AbstractCegarLoop]: Abstraction has 34965 states and 119197 transitions. [2021-05-03 14:10:56,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:56,648 INFO L276 IsEmpty]: Start isEmpty. Operand 34965 states and 119197 transitions. [2021-05-03 14:10:56,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:56,658 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:56,658 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:56,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24670,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:56,860 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:56,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:56,860 INFO L82 PathProgramCache]: Analyzing trace with hash -230152822, now seen corresponding path program 253 times [2021-05-03 14:10:56,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:56,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871533450] [2021-05-03 14:10:56,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:56,952 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:56,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871533450] [2021-05-03 14:10:56,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866911000] [2021-05-03 14:10:56,952 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:56,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:56,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:56,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:57,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:57,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:10:57,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833355458] [2021-05-03 14:10:57,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:10:57,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:57,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:10:57,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:10:57,024 INFO L87 Difference]: Start difference. First operand 34965 states and 119197 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:57,554 INFO L93 Difference]: Finished difference Result 35597 states and 120659 transitions. [2021-05-03 14:10:57,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 14:10:57,555 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:57,621 INFO L225 Difference]: With dead ends: 35597 [2021-05-03 14:10:57,621 INFO L226 Difference]: Without dead ends: 35597 [2021-05-03 14:10:57,622 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 385.8ms TimeCoverageRelationStatistics Valid=778, Invalid=1574, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 14:10:57,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35597 states. [2021-05-03 14:10:58,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35597 to 35052. [2021-05-03 14:10:58,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35052 states, 35051 states have (on average 3.4081195971584264) internal successors, (119458), 35051 states have internal predecessors, (119458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35052 states to 35052 states and 119458 transitions. [2021-05-03 14:10:58,407 INFO L78 Accepts]: Start accepts. Automaton has 35052 states and 119458 transitions. Word has length 22 [2021-05-03 14:10:58,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:58,407 INFO L480 AbstractCegarLoop]: Abstraction has 35052 states and 119458 transitions. [2021-05-03 14:10:58,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:58,407 INFO L276 IsEmpty]: Start isEmpty. Operand 35052 states and 119458 transitions. [2021-05-03 14:10:58,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:10:58,417 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:58,417 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:58,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24671,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:58,618 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:58,619 INFO L82 PathProgramCache]: Analyzing trace with hash -599127143, now seen corresponding path program 254 times [2021-05-03 14:10:58,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:58,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436314592] [2021-05-03 14:10:58,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:58,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436314592] [2021-05-03 14:10:58,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119576278] [2021-05-03 14:10:58,705 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 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:10:58,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:10:58,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:58,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:10:58,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:58,773 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 50 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:58,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:58,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:10:58,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716061148] [2021-05-03 14:10:58,774 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:10:58,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:58,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:10:58,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:10:58,774 INFO L87 Difference]: Start difference. First operand 35052 states and 119458 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:59,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:59,039 INFO L93 Difference]: Finished difference Result 35467 states and 120355 transitions. [2021-05-03 14:10:59,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:10:59,040 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:10:59,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:59,120 INFO L225 Difference]: With dead ends: 35467 [2021-05-03 14:10:59,121 INFO L226 Difference]: Without dead ends: 35467 [2021-05-03 14:10:59,121 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 116.4ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:10:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35467 states. [2021-05-03 14:10:59,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35467 to 35013. [2021-05-03 14:10:59,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35013 states, 35012 states have (on average 3.4085742031303554) internal successors, (119341), 35012 states have internal predecessors, (119341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:00,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35013 states to 35013 states and 119341 transitions. [2021-05-03 14:11:00,035 INFO L78 Accepts]: Start accepts. Automaton has 35013 states and 119341 transitions. Word has length 22 [2021-05-03 14:11:00,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:00,035 INFO L480 AbstractCegarLoop]: Abstraction has 35013 states and 119341 transitions. [2021-05-03 14:11:00,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:00,035 INFO L276 IsEmpty]: Start isEmpty. Operand 35013 states and 119341 transitions. [2021-05-03 14:11:00,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:00,044 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:00,044 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:00,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24672,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:00,244 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:00,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:00,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1376871388, now seen corresponding path program 255 times [2021-05-03 14:11:00,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:00,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165866928] [2021-05-03 14:11:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:00,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:00,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165866928] [2021-05-03 14:11:00,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567529638] [2021-05-03 14:11:00,315 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 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:00,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:11:00,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:00,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:00,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:00,393 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:00,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:00,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:11:00,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076912503] [2021-05-03 14:11:00,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:11:00,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:00,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:11:00,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:11:00,401 INFO L87 Difference]: Start difference. First operand 35013 states and 119341 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:00,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:00,803 INFO L93 Difference]: Finished difference Result 35354 states and 119908 transitions. [2021-05-03 14:11:00,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:11:00,809 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:00,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:00,899 INFO L225 Difference]: With dead ends: 35354 [2021-05-03 14:11:00,899 INFO L226 Difference]: Without dead ends: 35350 [2021-05-03 14:11:00,899 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 200.1ms TimeCoverageRelationStatistics Valid=299, Invalid=571, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:11:00,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35350 states. [2021-05-03 14:11:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35350 to 34236. [2021-05-03 14:11:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34236 states, 34235 states have (on average 3.406192493062655) internal successors, (116611), 34235 states have internal predecessors, (116611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:02,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34236 states to 34236 states and 116611 transitions. [2021-05-03 14:11:02,118 INFO L78 Accepts]: Start accepts. Automaton has 34236 states and 116611 transitions. Word has length 22 [2021-05-03 14:11:02,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:02,118 INFO L480 AbstractCegarLoop]: Abstraction has 34236 states and 116611 transitions. [2021-05-03 14:11:02,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:02,118 INFO L276 IsEmpty]: Start isEmpty. Operand 34236 states and 116611 transitions. [2021-05-03 14:11:02,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:02,129 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:02,129 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:02,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24673 [2021-05-03 14:11:02,345 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:02,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:02,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1955591385, now seen corresponding path program 256 times [2021-05-03 14:11:02,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:02,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923845623] [2021-05-03 14:11:02,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:02,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:02,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923845623] [2021-05-03 14:11:02,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442243206] [2021-05-03 14:11:02,508 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:02,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:02,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:02,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:02,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:02,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:02,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:11:02,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888964674] [2021-05-03 14:11:02,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:11:02,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:02,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:11:02,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:02,628 INFO L87 Difference]: Start difference. First operand 34236 states and 116611 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:02,993 INFO L93 Difference]: Finished difference Result 34750 states and 117977 transitions. [2021-05-03 14:11:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:11:02,994 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:02,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:03,080 INFO L225 Difference]: With dead ends: 34750 [2021-05-03 14:11:03,080 INFO L226 Difference]: Without dead ends: 34744 [2021-05-03 14:11:03,081 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 234.2ms TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:11:03,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34744 states. [2021-05-03 14:11:04,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34744 to 34236. [2021-05-03 14:11:04,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34236 states, 34235 states have (on average 3.406134073316781) internal successors, (116609), 34235 states have internal predecessors, (116609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34236 states to 34236 states and 116609 transitions. [2021-05-03 14:11:04,152 INFO L78 Accepts]: Start accepts. Automaton has 34236 states and 116609 transitions. Word has length 22 [2021-05-03 14:11:04,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:04,152 INFO L480 AbstractCegarLoop]: Abstraction has 34236 states and 116609 transitions. [2021-05-03 14:11:04,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:04,152 INFO L276 IsEmpty]: Start isEmpty. Operand 34236 states and 116609 transitions. [2021-05-03 14:11:04,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:04,163 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:04,163 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:04,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24674 [2021-05-03 14:11:04,385 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:04,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:04,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2119589156, now seen corresponding path program 257 times [2021-05-03 14:11:04,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:04,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412313759] [2021-05-03 14:11:04,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:04,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412313759] [2021-05-03 14:11:04,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573265640] [2021-05-03 14:11:04,474 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:04,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:11:04,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:04,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:04,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:04,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:04,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-05-03 14:11:04,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906063247] [2021-05-03 14:11:04,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:11:04,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:04,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:11:04,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:04,551 INFO L87 Difference]: Start difference. First operand 34236 states and 116609 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:05,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:05,046 INFO L93 Difference]: Finished difference Result 42443 states and 142235 transitions. [2021-05-03 14:11:05,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:11:05,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:05,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:05,160 INFO L225 Difference]: With dead ends: 42443 [2021-05-03 14:11:05,160 INFO L226 Difference]: Without dead ends: 42443 [2021-05-03 14:11:05,160 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=452, Invalid=880, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:11:05,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42443 states. [2021-05-03 14:11:06,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42443 to 40328. [2021-05-03 14:11:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40328 states, 40327 states have (on average 3.386341656954398) internal successors, (136561), 40327 states have internal predecessors, (136561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40328 states to 40328 states and 136561 transitions. [2021-05-03 14:11:06,359 INFO L78 Accepts]: Start accepts. Automaton has 40328 states and 136561 transitions. Word has length 22 [2021-05-03 14:11:06,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:06,359 INFO L480 AbstractCegarLoop]: Abstraction has 40328 states and 136561 transitions. [2021-05-03 14:11:06,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:06,359 INFO L276 IsEmpty]: Start isEmpty. Operand 40328 states and 136561 transitions. [2021-05-03 14:11:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:06,371 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:06,371 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:06,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24675 [2021-05-03 14:11:06,589 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:06,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:06,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1319124531, now seen corresponding path program 258 times [2021-05-03 14:11:06,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:06,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711443327] [2021-05-03 14:11:06,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:06,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:06,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711443327] [2021-05-03 14:11:06,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48481109] [2021-05-03 14:11:06,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:06,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:11:06,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:06,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:06,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:06,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:06,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:06,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859794917] [2021-05-03 14:11:06,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:06,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:06,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:06,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:06,767 INFO L87 Difference]: Start difference. First operand 40328 states and 136561 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:07,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:07,153 INFO L93 Difference]: Finished difference Result 40963 states and 138166 transitions. [2021-05-03 14:11:07,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:11:07,154 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:07,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:07,259 INFO L225 Difference]: With dead ends: 40963 [2021-05-03 14:11:07,259 INFO L226 Difference]: Without dead ends: 40957 [2021-05-03 14:11:07,260 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:11:07,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40957 states. [2021-05-03 14:11:08,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40957 to 40328. [2021-05-03 14:11:08,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40328 states, 40327 states have (on average 3.386292062389962) internal successors, (136559), 40327 states have internal predecessors, (136559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:08,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40328 states to 40328 states and 136559 transitions. [2021-05-03 14:11:08,444 INFO L78 Accepts]: Start accepts. Automaton has 40328 states and 136559 transitions. Word has length 22 [2021-05-03 14:11:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:08,444 INFO L480 AbstractCegarLoop]: Abstraction has 40328 states and 136559 transitions. [2021-05-03 14:11:08,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:08,444 INFO L276 IsEmpty]: Start isEmpty. Operand 40328 states and 136559 transitions. [2021-05-03 14:11:08,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:08,456 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:08,456 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:08,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24676 [2021-05-03 14:11:08,678 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:08,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:08,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1483122302, now seen corresponding path program 259 times [2021-05-03 14:11:08,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:08,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579650320] [2021-05-03 14:11:08,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:08,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579650320] [2021-05-03 14:11:08,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883152435] [2021-05-03 14:11:08,772 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 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:08,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:08,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:08,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:08,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:08,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640074007] [2021-05-03 14:11:08,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:08,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:08,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:08,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:08,871 INFO L87 Difference]: Start difference. First operand 40328 states and 136559 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:09,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:09,407 INFO L93 Difference]: Finished difference Result 47750 states and 159770 transitions. [2021-05-03 14:11:09,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:11:09,407 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:09,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:09,542 INFO L225 Difference]: With dead ends: 47750 [2021-05-03 14:11:09,543 INFO L226 Difference]: Without dead ends: 47750 [2021-05-03 14:11:09,543 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 321.0ms TimeCoverageRelationStatistics Valid=461, Invalid=871, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:11:09,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47750 states. [2021-05-03 14:11:10,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47750 to 35545. [2021-05-03 14:11:10,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35545 states, 35544 states have (on average 3.380429889714157) internal successors, (120154), 35544 states have internal predecessors, (120154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35545 states to 35545 states and 120154 transitions. [2021-05-03 14:11:10,717 INFO L78 Accepts]: Start accepts. Automaton has 35545 states and 120154 transitions. Word has length 22 [2021-05-03 14:11:10,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:10,717 INFO L480 AbstractCegarLoop]: Abstraction has 35545 states and 120154 transitions. [2021-05-03 14:11:10,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:10,717 INFO L276 IsEmpty]: Start isEmpty. Operand 35545 states and 120154 transitions. [2021-05-03 14:11:10,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:10,729 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:10,729 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:10,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24677 [2021-05-03 14:11:10,949 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:10,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:10,949 INFO L82 PathProgramCache]: Analyzing trace with hash 474153079, now seen corresponding path program 260 times [2021-05-03 14:11:10,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:10,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279945308] [2021-05-03 14:11:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:11,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279945308] [2021-05-03 14:11:11,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031022776] [2021-05-03 14:11:11,045 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:11,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:11,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:11,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:11,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:11,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:11,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:11,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194903574] [2021-05-03 14:11:11,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:11,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:11,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:11,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:11,126 INFO L87 Difference]: Start difference. First operand 35545 states and 120154 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:11,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:11,647 INFO L93 Difference]: Finished difference Result 36460 states and 122661 transitions. [2021-05-03 14:11:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:11:11,648 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:11,725 INFO L225 Difference]: With dead ends: 36460 [2021-05-03 14:11:11,725 INFO L226 Difference]: Without dead ends: 36453 [2021-05-03 14:11:11,725 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 300.9ms TimeCoverageRelationStatistics Valid=369, Invalid=753, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:11:11,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36453 states. [2021-05-03 14:11:12,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36453 to 35618. [2021-05-03 14:11:12,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35618 states, 35617 states have (on average 3.3797624729763878) internal successors, (120377), 35617 states have internal predecessors, (120377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:12,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35618 states to 35618 states and 120377 transitions. [2021-05-03 14:11:12,777 INFO L78 Accepts]: Start accepts. Automaton has 35618 states and 120377 transitions. Word has length 22 [2021-05-03 14:11:12,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:12,777 INFO L480 AbstractCegarLoop]: Abstraction has 35618 states and 120377 transitions. [2021-05-03 14:11:12,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:12,777 INFO L276 IsEmpty]: Start isEmpty. Operand 35618 states and 120377 transitions. [2021-05-03 14:11:12,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:12,789 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:12,789 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:13,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24678,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:13,005 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:13,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:13,005 INFO L82 PathProgramCache]: Analyzing trace with hash 215665124, now seen corresponding path program 261 times [2021-05-03 14:11:13,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:13,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869416056] [2021-05-03 14:11:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:13,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869416056] [2021-05-03 14:11:13,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751583398] [2021-05-03 14:11:13,468 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:13,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:11:13,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:13,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:13,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:13,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:13,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:13,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933289536] [2021-05-03 14:11:13,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:13,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:13,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:13,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:13,553 INFO L87 Difference]: Start difference. First operand 35618 states and 120377 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:14,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:14,153 INFO L93 Difference]: Finished difference Result 40432 states and 135039 transitions. [2021-05-03 14:11:14,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 14:11:14,154 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:14,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:14,260 INFO L225 Difference]: With dead ends: 40432 [2021-05-03 14:11:14,261 INFO L226 Difference]: Without dead ends: 40432 [2021-05-03 14:11:14,261 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 698.9ms TimeCoverageRelationStatistics Valid=641, Invalid=1251, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 14:11:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40432 states. [2021-05-03 14:11:15,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40432 to 35682. [2021-05-03 14:11:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35682 states, 35681 states have (on average 3.3822202292536643) internal successors, (120681), 35681 states have internal predecessors, (120681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:15,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35682 states to 35682 states and 120681 transitions. [2021-05-03 14:11:15,332 INFO L78 Accepts]: Start accepts. Automaton has 35682 states and 120681 transitions. Word has length 22 [2021-05-03 14:11:15,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:15,332 INFO L480 AbstractCegarLoop]: Abstraction has 35682 states and 120681 transitions. [2021-05-03 14:11:15,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:15,332 INFO L276 IsEmpty]: Start isEmpty. Operand 35682 states and 120681 transitions. [2021-05-03 14:11:15,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:15,343 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:15,343 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:15,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24679 [2021-05-03 14:11:15,564 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:15,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:15,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1231478759, now seen corresponding path program 262 times [2021-05-03 14:11:15,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:15,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106955198] [2021-05-03 14:11:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:15,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106955198] [2021-05-03 14:11:15,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525824122] [2021-05-03 14:11:15,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:15,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:15,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:15,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:15,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:15,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:15,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:15,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391557066] [2021-05-03 14:11:15,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:15,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:15,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:15,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:15,750 INFO L87 Difference]: Start difference. First operand 35682 states and 120681 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:16,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:16,125 INFO L93 Difference]: Finished difference Result 36907 states and 124167 transitions. [2021-05-03 14:11:16,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:11:16,126 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:16,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:16,218 INFO L225 Difference]: With dead ends: 36907 [2021-05-03 14:11:16,218 INFO L226 Difference]: Without dead ends: 36901 [2021-05-03 14:11:16,218 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:16,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36901 states. [2021-05-03 14:11:17,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36901 to 35689. [2021-05-03 14:11:17,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35689 states, 35688 states have (on average 3.3821452589105583) internal successors, (120702), 35688 states have internal predecessors, (120702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:17,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35689 states to 35689 states and 120702 transitions. [2021-05-03 14:11:17,232 INFO L78 Accepts]: Start accepts. Automaton has 35689 states and 120702 transitions. Word has length 22 [2021-05-03 14:11:17,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:17,233 INFO L480 AbstractCegarLoop]: Abstraction has 35689 states and 120702 transitions. [2021-05-03 14:11:17,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:17,233 INFO L276 IsEmpty]: Start isEmpty. Operand 35689 states and 120702 transitions. [2021-05-03 14:11:17,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:17,245 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:17,245 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:17,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24680 [2021-05-03 14:11:17,466 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:17,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:17,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1067480988, now seen corresponding path program 263 times [2021-05-03 14:11:17,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:17,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682843231] [2021-05-03 14:11:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:17,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:17,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682843231] [2021-05-03 14:11:17,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029629783] [2021-05-03 14:11:17,552 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:17,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:11:17,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:17,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:17,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:17,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:17,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:17,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123044114] [2021-05-03 14:11:17,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:17,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:17,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:17,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:17,661 INFO L87 Difference]: Start difference. First operand 35689 states and 120702 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:18,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:18,128 INFO L93 Difference]: Finished difference Result 37769 states and 126742 transitions. [2021-05-03 14:11:18,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:11:18,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:18,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:18,228 INFO L225 Difference]: With dead ends: 37769 [2021-05-03 14:11:18,228 INFO L226 Difference]: Without dead ends: 37769 [2021-05-03 14:11:18,228 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 302.4ms TimeCoverageRelationStatistics Valid=414, Invalid=776, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:11:18,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37769 states. [2021-05-03 14:11:19,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37769 to 35344. [2021-05-03 14:11:19,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35344 states, 35343 states have (on average 3.387177093059446) internal successors, (119713), 35343 states have internal predecessors, (119713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:19,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35344 states to 35344 states and 119713 transitions. [2021-05-03 14:11:19,267 INFO L78 Accepts]: Start accepts. Automaton has 35344 states and 119713 transitions. Word has length 22 [2021-05-03 14:11:19,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:19,267 INFO L480 AbstractCegarLoop]: Abstraction has 35344 states and 119713 transitions. [2021-05-03 14:11:19,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 35344 states and 119713 transitions. [2021-05-03 14:11:19,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:19,278 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:19,278 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:19,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24681,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:19,491 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:19,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:19,492 INFO L82 PathProgramCache]: Analyzing trace with hash -2076450211, now seen corresponding path program 264 times [2021-05-03 14:11:19,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:19,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310623407] [2021-05-03 14:11:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:19,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310623407] [2021-05-03 14:11:19,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231507418] [2021-05-03 14:11:19,588 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:19,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:11:19,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:19,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:19,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:19,674 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:19,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:19,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:19,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993893968] [2021-05-03 14:11:19,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:19,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:19,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:19,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:19,675 INFO L87 Difference]: Start difference. First operand 35344 states and 119713 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:20,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:20,023 INFO L93 Difference]: Finished difference Result 35796 states and 120895 transitions. [2021-05-03 14:11:20,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:11:20,024 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:20,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:20,116 INFO L225 Difference]: With dead ends: 35796 [2021-05-03 14:11:20,116 INFO L226 Difference]: Without dead ends: 35789 [2021-05-03 14:11:20,116 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:20,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35789 states. [2021-05-03 14:11:20,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35789 to 35344. [2021-05-03 14:11:21,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35344 states, 35343 states have (on average 3.387148798913505) internal successors, (119712), 35343 states have internal predecessors, (119712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:21,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35344 states to 35344 states and 119712 transitions. [2021-05-03 14:11:21,123 INFO L78 Accepts]: Start accepts. Automaton has 35344 states and 119712 transitions. Word has length 22 [2021-05-03 14:11:21,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:21,123 INFO L480 AbstractCegarLoop]: Abstraction has 35344 states and 119712 transitions. [2021-05-03 14:11:21,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:21,123 INFO L276 IsEmpty]: Start isEmpty. Operand 35344 states and 119712 transitions. [2021-05-03 14:11:21,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:21,134 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:21,134 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:21,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24682,266 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:21,355 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:21,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1960029130, now seen corresponding path program 265 times [2021-05-03 14:11:21,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:21,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133640752] [2021-05-03 14:11:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:21,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133640752] [2021-05-03 14:11:21,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460479798] [2021-05-03 14:11:21,444 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:21,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:21,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:21,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:21,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:21,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941744988] [2021-05-03 14:11:21,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:21,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:21,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:21,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:21,549 INFO L87 Difference]: Start difference. First operand 35344 states and 119712 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:22,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:22,167 INFO L93 Difference]: Finished difference Result 36722 states and 123439 transitions. [2021-05-03 14:11:22,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:11:22,168 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:22,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:22,266 INFO L225 Difference]: With dead ends: 36722 [2021-05-03 14:11:22,266 INFO L226 Difference]: Without dead ends: 36722 [2021-05-03 14:11:22,266 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 338.1ms TimeCoverageRelationStatistics Valid=517, Invalid=1043, Unknown=0, NotChecked=0, Total=1560 [2021-05-03 14:11:22,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36722 states. [2021-05-03 14:11:23,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36722 to 35442. [2021-05-03 14:11:23,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35442 states, 35441 states have (on average 3.387799441325019) internal successors, (120067), 35441 states have internal predecessors, (120067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:23,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35442 states to 35442 states and 120067 transitions. [2021-05-03 14:11:23,232 INFO L78 Accepts]: Start accepts. Automaton has 35442 states and 120067 transitions. Word has length 22 [2021-05-03 14:11:23,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:23,232 INFO L480 AbstractCegarLoop]: Abstraction has 35442 states and 120067 transitions. [2021-05-03 14:11:23,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:23,232 INFO L276 IsEmpty]: Start isEmpty. Operand 35442 states and 120067 transitions. [2021-05-03 14:11:23,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:23,246 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:23,246 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:23,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24683,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:23,469 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:23,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:23,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1794205849, now seen corresponding path program 266 times [2021-05-03 14:11:23,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:23,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880656806] [2021-05-03 14:11:23,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:23,569 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:23,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880656806] [2021-05-03 14:11:23,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162483843] [2021-05-03 14:11:23,570 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:23,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:23,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:23,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:23,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:23,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:23,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:23,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849831407] [2021-05-03 14:11:23,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:23,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:23,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:23,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:23,656 INFO L87 Difference]: Start difference. First operand 35442 states and 120067 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:23,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:23,982 INFO L93 Difference]: Finished difference Result 35860 states and 121183 transitions. [2021-05-03 14:11:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:11:23,983 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:23,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:24,077 INFO L225 Difference]: With dead ends: 35860 [2021-05-03 14:11:24,077 INFO L226 Difference]: Without dead ends: 35852 [2021-05-03 14:11:24,077 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 196.0ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:24,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35852 states. [2021-05-03 14:11:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35852 to 35442. [2021-05-03 14:11:24,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35442 states, 35441 states have (on average 3.38777122541689) internal successors, (120066), 35441 states have internal predecessors, (120066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35442 states to 35442 states and 120066 transitions. [2021-05-03 14:11:24,964 INFO L78 Accepts]: Start accepts. Automaton has 35442 states and 120066 transitions. Word has length 22 [2021-05-03 14:11:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:24,964 INFO L480 AbstractCegarLoop]: Abstraction has 35442 states and 120066 transitions. [2021-05-03 14:11:24,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:24,965 INFO L276 IsEmpty]: Start isEmpty. Operand 35442 states and 120066 transitions. [2021-05-03 14:11:24,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:24,974 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:24,974 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:25,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24684,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:25,175 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:25,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:25,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1323562276, now seen corresponding path program 267 times [2021-05-03 14:11:25,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:25,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967196963] [2021-05-03 14:11:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:25,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967196963] [2021-05-03 14:11:25,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322724710] [2021-05-03 14:11:25,273 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:25,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:11:25,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:25,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:25,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:25,357 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:25,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:25,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:25,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689705809] [2021-05-03 14:11:25,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:25,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:25,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:25,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:25,358 INFO L87 Difference]: Start difference. First operand 35442 states and 120066 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:25,968 INFO L93 Difference]: Finished difference Result 36817 states and 123640 transitions. [2021-05-03 14:11:25,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-03 14:11:25,969 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:25,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:26,071 INFO L225 Difference]: With dead ends: 36817 [2021-05-03 14:11:26,071 INFO L226 Difference]: Without dead ends: 36817 [2021-05-03 14:11:26,072 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 425.2ms TimeCoverageRelationStatistics Valid=752, Invalid=1504, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 14:11:26,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36817 states. [2021-05-03 14:11:26,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36817 to 35424. [2021-05-03 14:11:27,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35424 states, 35423 states have (on average 3.3881376506789374) internal successors, (120018), 35423 states have internal predecessors, (120018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:27,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35424 states to 35424 states and 120018 transitions. [2021-05-03 14:11:27,130 INFO L78 Accepts]: Start accepts. Automaton has 35424 states and 120018 transitions. Word has length 22 [2021-05-03 14:11:27,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:27,130 INFO L480 AbstractCegarLoop]: Abstraction has 35424 states and 120018 transitions. [2021-05-03 14:11:27,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:27,130 INFO L276 IsEmpty]: Start isEmpty. Operand 35424 states and 120018 transitions. [2021-05-03 14:11:27,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:27,141 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:27,141 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:27,362 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24685 [2021-05-03 14:11:27,362 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:27,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:27,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1304197875, now seen corresponding path program 268 times [2021-05-03 14:11:27,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:27,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843237762] [2021-05-03 14:11:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:27,463 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:27,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843237762] [2021-05-03 14:11:27,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920270903] [2021-05-03 14:11:27,463 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 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:27,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:27,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:27,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:27,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 29 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:27,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:27,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:27,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599185128] [2021-05-03 14:11:27,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:27,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:27,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:27,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:27,537 INFO L87 Difference]: Start difference. First operand 35424 states and 120018 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:27,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:27,901 INFO L93 Difference]: Finished difference Result 37279 states and 125493 transitions. [2021-05-03 14:11:27,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:11:27,902 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:27,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:28,000 INFO L225 Difference]: With dead ends: 37279 [2021-05-03 14:11:28,000 INFO L226 Difference]: Without dead ends: 37273 [2021-05-03 14:11:28,000 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:28,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37273 states. [2021-05-03 14:11:28,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37273 to 35486. [2021-05-03 14:11:29,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35486 states, 35485 states have (on average 3.3883049175708044) internal successors, (120234), 35485 states have internal predecessors, (120234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:29,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35486 states to 35486 states and 120234 transitions. [2021-05-03 14:11:29,119 INFO L78 Accepts]: Start accepts. Automaton has 35486 states and 120234 transitions. Word has length 22 [2021-05-03 14:11:29,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:29,119 INFO L480 AbstractCegarLoop]: Abstraction has 35486 states and 120234 transitions. [2021-05-03 14:11:29,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:29,119 INFO L276 IsEmpty]: Start isEmpty. Operand 35486 states and 120234 transitions. [2021-05-03 14:11:29,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:29,131 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:29,131 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:29,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24686,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:29,352 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:29,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:29,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1468195646, now seen corresponding path program 269 times [2021-05-03 14:11:29,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:29,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821593075] [2021-05-03 14:11:29,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:29,439 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:29,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821593075] [2021-05-03 14:11:29,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552429753] [2021-05-03 14:11:29,442 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 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:29,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:11:29,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:29,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:29,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:29,528 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:29,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:29,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:29,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201685755] [2021-05-03 14:11:29,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:29,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:29,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:29,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:29,529 INFO L87 Difference]: Start difference. First operand 35486 states and 120234 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:29,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:29,902 INFO L93 Difference]: Finished difference Result 36239 states and 122100 transitions. [2021-05-03 14:11:29,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:11:29,903 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:29,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:29,993 INFO L225 Difference]: With dead ends: 36239 [2021-05-03 14:11:29,993 INFO L226 Difference]: Without dead ends: 36239 [2021-05-03 14:11:29,994 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 238.2ms TimeCoverageRelationStatistics Valid=342, Invalid=650, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:11:30,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36239 states. [2021-05-03 14:11:30,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36239 to 35451. [2021-05-03 14:11:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35451 states, 35450 states have (on average 3.389026798307475) internal successors, (120141), 35450 states have internal predecessors, (120141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35451 states to 35451 states and 120141 transitions. [2021-05-03 14:11:30,912 INFO L78 Accepts]: Start accepts. Automaton has 35451 states and 120141 transitions. Word has length 22 [2021-05-03 14:11:30,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:30,913 INFO L480 AbstractCegarLoop]: Abstraction has 35451 states and 120141 transitions. [2021-05-03 14:11:30,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:30,913 INFO L276 IsEmpty]: Start isEmpty. Operand 35451 states and 120141 transitions. [2021-05-03 14:11:30,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:30,922 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:30,922 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:31,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24687 [2021-05-03 14:11:31,125 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:31,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:31,125 INFO L82 PathProgramCache]: Analyzing trace with hash 459226423, now seen corresponding path program 270 times [2021-05-03 14:11:31,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:31,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402355620] [2021-05-03 14:11:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:31,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402355620] [2021-05-03 14:11:31,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38372376] [2021-05-03 14:11:31,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:31,227 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:11:31,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:31,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:31,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:31,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:31,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:31,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016954220] [2021-05-03 14:11:31,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:31,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:31,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:31,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:31,274 INFO L87 Difference]: Start difference. First operand 35451 states and 120141 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:31,537 INFO L93 Difference]: Finished difference Result 35974 states and 121515 transitions. [2021-05-03 14:11:31,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:11:31,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:31,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:31,596 INFO L225 Difference]: With dead ends: 35974 [2021-05-03 14:11:31,596 INFO L226 Difference]: Without dead ends: 35967 [2021-05-03 14:11:31,597 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:31,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35967 states. [2021-05-03 14:11:32,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35967 to 35451. [2021-05-03 14:11:32,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35451 states, 35450 states have (on average 3.3889985895627643) internal successors, (120140), 35450 states have internal predecessors, (120140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:32,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35451 states to 35451 states and 120140 transitions. [2021-05-03 14:11:32,442 INFO L78 Accepts]: Start accepts. Automaton has 35451 states and 120140 transitions. Word has length 22 [2021-05-03 14:11:32,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:32,442 INFO L480 AbstractCegarLoop]: Abstraction has 35451 states and 120140 transitions. [2021-05-03 14:11:32,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:32,442 INFO L276 IsEmpty]: Start isEmpty. Operand 35451 states and 120140 transitions. [2021-05-03 14:11:32,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:32,454 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:32,454 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:32,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24688,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:32,654 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:32,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:32,655 INFO L82 PathProgramCache]: Analyzing trace with hash 200738468, now seen corresponding path program 271 times [2021-05-03 14:11:32,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:32,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096828688] [2021-05-03 14:11:32,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:32,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096828688] [2021-05-03 14:11:32,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155969469] [2021-05-03 14:11:32,731 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 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:32,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:32,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:32,800 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:32,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:32,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:32,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139521239] [2021-05-03 14:11:32,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:32,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:32,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:32,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:32,801 INFO L87 Difference]: Start difference. First operand 35451 states and 120140 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:33,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:33,158 INFO L93 Difference]: Finished difference Result 35935 states and 121243 transitions. [2021-05-03 14:11:33,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:11:33,159 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:33,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:33,245 INFO L225 Difference]: With dead ends: 35935 [2021-05-03 14:11:33,245 INFO L226 Difference]: Without dead ends: 35935 [2021-05-03 14:11:33,245 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 218.5ms TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:11:33,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35935 states. [2021-05-03 14:11:34,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35935 to 35458. [2021-05-03 14:11:34,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.389062808472234) internal successors, (120166), 35457 states have internal predecessors, (120166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:34,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120166 transitions. [2021-05-03 14:11:34,183 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120166 transitions. Word has length 22 [2021-05-03 14:11:34,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:34,183 INFO L480 AbstractCegarLoop]: Abstraction has 35458 states and 120166 transitions. [2021-05-03 14:11:34,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:34,183 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120166 transitions. [2021-05-03 14:11:34,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:34,192 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:34,192 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:34,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24689 [2021-05-03 14:11:34,393 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:34,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:34,393 INFO L82 PathProgramCache]: Analyzing trace with hash 34915187, now seen corresponding path program 272 times [2021-05-03 14:11:34,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:34,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3836176] [2021-05-03 14:11:34,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:34,475 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:34,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3836176] [2021-05-03 14:11:34,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438122903] [2021-05-03 14:11:34,475 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:34,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:34,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:34,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:34,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:34,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:34,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:34,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37318221] [2021-05-03 14:11:34,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:34,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:34,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:34,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:34,542 INFO L87 Difference]: Start difference. First operand 35458 states and 120166 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:34,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:34,808 INFO L93 Difference]: Finished difference Result 35954 states and 121474 transitions. [2021-05-03 14:11:34,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:11:34,809 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:34,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:34,879 INFO L225 Difference]: With dead ends: 35954 [2021-05-03 14:11:34,880 INFO L226 Difference]: Without dead ends: 35946 [2021-05-03 14:11:34,880 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:34,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35946 states. [2021-05-03 14:11:35,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35946 to 35458. [2021-05-03 14:11:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.3890346052965565) internal successors, (120165), 35457 states have internal predecessors, (120165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:35,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120165 transitions. [2021-05-03 14:11:35,862 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120165 transitions. Word has length 22 [2021-05-03 14:11:35,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:35,862 INFO L480 AbstractCegarLoop]: Abstraction has 35458 states and 120165 transitions. [2021-05-03 14:11:35,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:35,862 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120165 transitions. [2021-05-03 14:11:35,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:35,870 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:35,870 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:36,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24690,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:36,071 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:36,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:36,071 INFO L82 PathProgramCache]: Analyzing trace with hash -435728386, now seen corresponding path program 273 times [2021-05-03 14:11:36,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:36,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897223452] [2021-05-03 14:11:36,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:36,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897223452] [2021-05-03 14:11:36,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387314969] [2021-05-03 14:11:36,153 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 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:36,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:11:36,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:36,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:36,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:36,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:36,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:36,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519229611] [2021-05-03 14:11:36,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:36,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:36,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:36,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:36,227 INFO L87 Difference]: Start difference. First operand 35458 states and 120165 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:36,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:36,669 INFO L93 Difference]: Finished difference Result 35839 states and 120966 transitions. [2021-05-03 14:11:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 14:11:36,670 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:36,739 INFO L225 Difference]: With dead ends: 35839 [2021-05-03 14:11:36,739 INFO L226 Difference]: Without dead ends: 35839 [2021-05-03 14:11:36,739 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 316.4ms TimeCoverageRelationStatistics Valid=592, Invalid=1214, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:11:36,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35839 states. [2021-05-03 14:11:37,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35839 to 35458. [2021-05-03 14:11:37,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.3890346052965565) internal successors, (120165), 35457 states have internal predecessors, (120165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:37,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120165 transitions. [2021-05-03 14:11:37,726 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120165 transitions. Word has length 22 [2021-05-03 14:11:37,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:37,726 INFO L480 AbstractCegarLoop]: Abstraction has 35458 states and 120165 transitions. [2021-05-03 14:11:37,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:37,726 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120165 transitions. [2021-05-03 14:11:37,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:37,738 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:37,738 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:37,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24691,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:37,938 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:37,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:37,939 INFO L82 PathProgramCache]: Analyzing trace with hash -233831241, now seen corresponding path program 274 times [2021-05-03 14:11:37,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:37,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879370809] [2021-05-03 14:11:37,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:38,047 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:38,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879370809] [2021-05-03 14:11:38,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438048604] [2021-05-03 14:11:38,047 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:38,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:38,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:38,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:38,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:38,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:38,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:38,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240598211] [2021-05-03 14:11:38,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:38,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:38,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:38,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:38,125 INFO L87 Difference]: Start difference. First operand 35458 states and 120165 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:38,502 INFO L93 Difference]: Finished difference Result 35916 states and 121397 transitions. [2021-05-03 14:11:38,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:11:38,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:38,580 INFO L225 Difference]: With dead ends: 35916 [2021-05-03 14:11:38,580 INFO L226 Difference]: Without dead ends: 35907 [2021-05-03 14:11:38,580 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 218.5ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:11:38,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35907 states. [2021-05-03 14:11:39,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35907 to 35458. [2021-05-03 14:11:39,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35458 states, 35457 states have (on average 3.389006402120879) internal successors, (120164), 35457 states have internal predecessors, (120164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:39,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35458 states to 35458 states and 120164 transitions. [2021-05-03 14:11:39,207 INFO L78 Accepts]: Start accepts. Automaton has 35458 states and 120164 transitions. Word has length 22 [2021-05-03 14:11:39,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:39,207 INFO L480 AbstractCegarLoop]: Abstraction has 35458 states and 120164 transitions. [2021-05-03 14:11:39,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:39,207 INFO L276 IsEmpty]: Start isEmpty. Operand 35458 states and 120164 transitions. [2021-05-03 14:11:39,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:39,216 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:39,216 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:39,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24692,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:39,417 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:39,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:39,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1308635620, now seen corresponding path program 275 times [2021-05-03 14:11:39,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:39,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065456994] [2021-05-03 14:11:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:39,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:39,714 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 6 [2021-05-03 14:11:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:39,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065456994] [2021-05-03 14:11:39,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080140089] [2021-05-03 14:11:39,755 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 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:39,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:11:39,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:39,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:39,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:39,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:39,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:11:39,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23959704] [2021-05-03 14:11:39,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:11:39,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:39,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:11:39,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:11:39,834 INFO L87 Difference]: Start difference. First operand 35458 states and 120164 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:40,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:40,376 INFO L93 Difference]: Finished difference Result 35992 states and 121396 transitions. [2021-05-03 14:11:40,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 14:11:40,377 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:40,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:40,444 INFO L225 Difference]: With dead ends: 35992 [2021-05-03 14:11:40,444 INFO L226 Difference]: Without dead ends: 35992 [2021-05-03 14:11:40,445 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 633.8ms TimeCoverageRelationStatistics Valid=777, Invalid=1575, Unknown=0, NotChecked=0, Total=2352 [2021-05-03 14:11:40,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35992 states. [2021-05-03 14:11:40,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35992 to 35459. [2021-05-03 14:11:40,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35459 states, 35458 states have (on average 3.3889954312143944) internal successors, (120167), 35458 states have internal predecessors, (120167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35459 states to 35459 states and 120167 transitions. [2021-05-03 14:11:40,989 INFO L78 Accepts]: Start accepts. Automaton has 35459 states and 120167 transitions. Word has length 22 [2021-05-03 14:11:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:40,989 INFO L480 AbstractCegarLoop]: Abstraction has 35459 states and 120167 transitions. [2021-05-03 14:11:40,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 35459 states and 120167 transitions. [2021-05-03 14:11:40,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:40,998 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:40,998 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:41,198 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24693,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:41,199 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:41,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:41,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1917455481, now seen corresponding path program 276 times [2021-05-03 14:11:41,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:41,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747655700] [2021-05-03 14:11:41,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:41,426 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-05-03 14:11:41,467 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:41,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747655700] [2021-05-03 14:11:41,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514075318] [2021-05-03 14:11:41,467 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:41,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:11:41,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:41,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:41,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:41,550 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:41,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:41,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:11:41,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367496259] [2021-05-03 14:11:41,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:11:41,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:41,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:11:41,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:11:41,551 INFO L87 Difference]: Start difference. First operand 35459 states and 120167 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:41,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:41,778 INFO L93 Difference]: Finished difference Result 35845 states and 120782 transitions. [2021-05-03 14:11:41,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:11:41,778 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:41,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:41,847 INFO L225 Difference]: With dead ends: 35845 [2021-05-03 14:11:41,847 INFO L226 Difference]: Without dead ends: 35845 [2021-05-03 14:11:41,847 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:41,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35845 states. [2021-05-03 14:11:42,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35845 to 35470. [2021-05-03 14:11:42,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35470 states, 35469 states have (on average 3.389128534776847) internal successors, (120209), 35469 states have internal predecessors, (120209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:42,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35470 states to 35470 states and 120209 transitions. [2021-05-03 14:11:42,479 INFO L78 Accepts]: Start accepts. Automaton has 35470 states and 120209 transitions. Word has length 22 [2021-05-03 14:11:42,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:42,479 INFO L480 AbstractCegarLoop]: Abstraction has 35470 states and 120209 transitions. [2021-05-03 14:11:42,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:42,479 INFO L276 IsEmpty]: Start isEmpty. Operand 35470 states and 120209 transitions. [2021-05-03 14:11:42,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:42,489 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:42,489 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:42,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24694 [2021-05-03 14:11:42,689 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:42,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:42,690 INFO L82 PathProgramCache]: Analyzing trace with hash -834165348, now seen corresponding path program 277 times [2021-05-03 14:11:42,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:42,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296473601] [2021-05-03 14:11:42,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:42,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296473601] [2021-05-03 14:11:42,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759858620] [2021-05-03 14:11:42,761 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:42,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:42,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:42,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:42,818 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:42,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:42,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:11:42,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160375759] [2021-05-03 14:11:42,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:11:42,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:42,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:11:42,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:11:42,818 INFO L87 Difference]: Start difference. First operand 35470 states and 120209 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:43,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:43,239 INFO L93 Difference]: Finished difference Result 36773 states and 124101 transitions. [2021-05-03 14:11:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:11:43,240 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:43,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:43,315 INFO L225 Difference]: With dead ends: 36773 [2021-05-03 14:11:43,315 INFO L226 Difference]: Without dead ends: 36769 [2021-05-03 14:11:43,315 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:11:43,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36769 states. [2021-05-03 14:11:43,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36769 to 36539. [2021-05-03 14:11:43,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36539 states, 36538 states have (on average 3.388362800372215) internal successors, (123804), 36538 states have internal predecessors, (123804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36539 states to 36539 states and 123804 transitions. [2021-05-03 14:11:43,938 INFO L78 Accepts]: Start accepts. Automaton has 36539 states and 123804 transitions. Word has length 22 [2021-05-03 14:11:43,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:43,938 INFO L480 AbstractCegarLoop]: Abstraction has 36539 states and 123804 transitions. [2021-05-03 14:11:43,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:43,938 INFO L276 IsEmpty]: Start isEmpty. Operand 36539 states and 123804 transitions. [2021-05-03 14:11:43,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:43,947 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:43,947 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:44,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24695,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:44,148 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:44,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:44,148 INFO L82 PathProgramCache]: Analyzing trace with hash -177363171, now seen corresponding path program 278 times [2021-05-03 14:11:44,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:44,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765108626] [2021-05-03 14:11:44,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:44,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765108626] [2021-05-03 14:11:44,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26762394] [2021-05-03 14:11:44,216 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:44,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:44,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:44,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:44,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:44,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:44,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:11:44,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791905186] [2021-05-03 14:11:44,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:11:44,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:44,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:11:44,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:11:44,274 INFO L87 Difference]: Start difference. First operand 36539 states and 123804 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:44,688 INFO L93 Difference]: Finished difference Result 36910 states and 124367 transitions. [2021-05-03 14:11:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:11:44,688 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:44,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:44,765 INFO L225 Difference]: With dead ends: 36910 [2021-05-03 14:11:44,765 INFO L226 Difference]: Without dead ends: 36909 [2021-05-03 14:11:44,765 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:11:44,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36909 states. [2021-05-03 14:11:45,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36909 to 36539. [2021-05-03 14:11:45,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36539 states, 36538 states have (on average 3.3881164814713447) internal successors, (123795), 36538 states have internal predecessors, (123795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:45,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36539 states to 36539 states and 123795 transitions. [2021-05-03 14:11:45,517 INFO L78 Accepts]: Start accepts. Automaton has 36539 states and 123795 transitions. Word has length 22 [2021-05-03 14:11:45,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:45,517 INFO L480 AbstractCegarLoop]: Abstraction has 36539 states and 123795 transitions. [2021-05-03 14:11:45,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:45,517 INFO L276 IsEmpty]: Start isEmpty. Operand 36539 states and 123795 transitions. [2021-05-03 14:11:45,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:45,528 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:45,528 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:45,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24696 [2021-05-03 14:11:45,729 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:45,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:45,729 INFO L82 PathProgramCache]: Analyzing trace with hash 745055562, now seen corresponding path program 279 times [2021-05-03 14:11:45,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:45,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948099312] [2021-05-03 14:11:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:45,793 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:45,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948099312] [2021-05-03 14:11:45,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714277511] [2021-05-03 14:11:45,794 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:45,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:11:45,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:45,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:45,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 14 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:45,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:45,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:11:45,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824045349] [2021-05-03 14:11:45,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:11:45,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:45,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:11:45,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:11:45,859 INFO L87 Difference]: Start difference. First operand 36539 states and 123795 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:46,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:46,258 INFO L93 Difference]: Finished difference Result 37170 states and 125257 transitions. [2021-05-03 14:11:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:11:46,259 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:46,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:46,329 INFO L225 Difference]: With dead ends: 37170 [2021-05-03 14:11:46,329 INFO L226 Difference]: Without dead ends: 37170 [2021-05-03 14:11:46,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:11:46,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37170 states. [2021-05-03 14:11:46,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37170 to 36554. [2021-05-03 14:11:46,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36554 states, 36553 states have (on average 3.3879024977430032) internal successors, (123838), 36553 states have internal predecessors, (123838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36554 states to 36554 states and 123838 transitions. [2021-05-03 14:11:46,944 INFO L78 Accepts]: Start accepts. Automaton has 36554 states and 123838 transitions. Word has length 22 [2021-05-03 14:11:46,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:46,944 INFO L480 AbstractCegarLoop]: Abstraction has 36554 states and 123838 transitions. [2021-05-03 14:11:46,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:46,944 INFO L276 IsEmpty]: Start isEmpty. Operand 36554 states and 123838 transitions. [2021-05-03 14:11:46,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:46,954 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:46,954 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:47,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24697 [2021-05-03 14:11:47,155 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:47,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:47,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1533250137, now seen corresponding path program 280 times [2021-05-03 14:11:47,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:47,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262998301] [2021-05-03 14:11:47,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:47,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262998301] [2021-05-03 14:11:47,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871689050] [2021-05-03 14:11:47,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:47,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:47,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:47,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:47,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 41 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:47,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:47,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:11:47,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056829802] [2021-05-03 14:11:47,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:11:47,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:47,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:11:47,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:47,333 INFO L87 Difference]: Start difference. First operand 36554 states and 123838 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:47,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:47,650 INFO L93 Difference]: Finished difference Result 36930 states and 124408 transitions. [2021-05-03 14:11:47,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:11:47,651 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:47,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:47,921 INFO L225 Difference]: With dead ends: 36930 [2021-05-03 14:11:47,921 INFO L226 Difference]: Without dead ends: 36928 [2021-05-03 14:11:47,922 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:11:47,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36928 states. [2021-05-03 14:11:48,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36928 to 36554. [2021-05-03 14:11:48,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36554 states, 36553 states have (on average 3.387847782671737) internal successors, (123836), 36553 states have internal predecessors, (123836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36554 states to 36554 states and 123836 transitions. [2021-05-03 14:11:48,577 INFO L78 Accepts]: Start accepts. Automaton has 36554 states and 123836 transitions. Word has length 22 [2021-05-03 14:11:48,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:48,577 INFO L480 AbstractCegarLoop]: Abstraction has 36554 states and 123836 transitions. [2021-05-03 14:11:48,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 36554 states and 123836 transitions. [2021-05-03 14:11:48,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:48,588 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:48,588 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:48,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24698 [2021-05-03 14:11:48,797 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:48,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:48,797 INFO L82 PathProgramCache]: Analyzing trace with hash -983991772, now seen corresponding path program 281 times [2021-05-03 14:11:48,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:48,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704252226] [2021-05-03 14:11:48,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:48,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704252226] [2021-05-03 14:11:48,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480718330] [2021-05-03 14:11:48,873 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 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:11:48,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:11:48,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:48,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:48,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:48,957 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:48,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:48,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:11:48,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017678835] [2021-05-03 14:11:48,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:11:48,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:48,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:11:48,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:48,958 INFO L87 Difference]: Start difference. First operand 36554 states and 123836 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:49,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:49,249 INFO L93 Difference]: Finished difference Result 37526 states and 126283 transitions. [2021-05-03 14:11:49,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:11:49,250 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:49,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:49,333 INFO L225 Difference]: With dead ends: 37526 [2021-05-03 14:11:49,333 INFO L226 Difference]: Without dead ends: 37526 [2021-05-03 14:11:49,333 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=212, Invalid=340, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:11:49,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37526 states. [2021-05-03 14:11:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37526 to 36659. [2021-05-03 14:11:50,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36659 states, 36658 states have (on average 3.386627748376889) internal successors, (124147), 36658 states have internal predecessors, (124147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:50,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36659 states to 36659 states and 124147 transitions. [2021-05-03 14:11:50,210 INFO L78 Accepts]: Start accepts. Automaton has 36659 states and 124147 transitions. Word has length 22 [2021-05-03 14:11:50,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:50,210 INFO L480 AbstractCegarLoop]: Abstraction has 36659 states and 124147 transitions. [2021-05-03 14:11:50,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:50,210 INFO L276 IsEmpty]: Start isEmpty. Operand 36659 states and 124147 transitions. [2021-05-03 14:11:50,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:50,222 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:50,222 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:50,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24699 [2021-05-03 14:11:50,444 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:50,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:50,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1272312163, now seen corresponding path program 282 times [2021-05-03 14:11:50,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:50,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856946123] [2021-05-03 14:11:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:50,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856946123] [2021-05-03 14:11:50,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642456631] [2021-05-03 14:11:50,548 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 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:50,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:11:50,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:50,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:50,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:50,633 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:50,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:50,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:11:50,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181680669] [2021-05-03 14:11:50,634 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:11:50,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:50,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:11:50,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:50,634 INFO L87 Difference]: Start difference. First operand 36659 states and 124147 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:51,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:51,031 INFO L93 Difference]: Finished difference Result 44560 states and 150459 transitions. [2021-05-03 14:11:51,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:11:51,032 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:51,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:51,150 INFO L225 Difference]: With dead ends: 44560 [2021-05-03 14:11:51,150 INFO L226 Difference]: Without dead ends: 44557 [2021-05-03 14:11:51,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=241, Invalid=461, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:11:51,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44557 states. [2021-05-03 14:11:52,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44557 to 37399. [2021-05-03 14:11:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37399 states, 37398 states have (on average 3.3886571474410396) internal successors, (126729), 37398 states have internal predecessors, (126729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:52,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37399 states to 37399 states and 126729 transitions. [2021-05-03 14:11:52,376 INFO L78 Accepts]: Start accepts. Automaton has 37399 states and 126729 transitions. Word has length 22 [2021-05-03 14:11:52,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:52,376 INFO L480 AbstractCegarLoop]: Abstraction has 37399 states and 126729 transitions. [2021-05-03 14:11:52,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:52,376 INFO L276 IsEmpty]: Start isEmpty. Operand 37399 states and 126729 transitions. [2021-05-03 14:11:52,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:52,387 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:52,387 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:52,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24700,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:52,608 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:52,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:52,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1250115722, now seen corresponding path program 283 times [2021-05-03 14:11:52,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:52,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673194594] [2021-05-03 14:11:52,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:52,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673194594] [2021-05-03 14:11:52,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658699113] [2021-05-03 14:11:52,683 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:52,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:52,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:52,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:52,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:52,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:11:52,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341144209] [2021-05-03 14:11:52,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:11:52,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:52,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:11:52,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:52,769 INFO L87 Difference]: Start difference. First operand 37399 states and 126729 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:53,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:53,119 INFO L93 Difference]: Finished difference Result 46106 states and 155238 transitions. [2021-05-03 14:11:53,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:11:53,120 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:53,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:53,613 INFO L225 Difference]: With dead ends: 46106 [2021-05-03 14:11:53,613 INFO L226 Difference]: Without dead ends: 46106 [2021-05-03 14:11:53,613 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 148.8ms TimeCoverageRelationStatistics Valid=221, Invalid=379, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:11:53,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46106 states. [2021-05-03 14:11:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46106 to 41545. [2021-05-03 14:11:54,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41545 states, 41544 states have (on average 3.3881667629501253) internal successors, (140758), 41544 states have internal predecessors, (140758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:54,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41545 states to 41545 states and 140758 transitions. [2021-05-03 14:11:54,474 INFO L78 Accepts]: Start accepts. Automaton has 41545 states and 140758 transitions. Word has length 22 [2021-05-03 14:11:54,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:54,475 INFO L480 AbstractCegarLoop]: Abstraction has 41545 states and 140758 transitions. [2021-05-03 14:11:54,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:54,475 INFO L276 IsEmpty]: Start isEmpty. Operand 41545 states and 140758 transitions. [2021-05-03 14:11:54,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:54,486 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:54,486 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:54,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24701 [2021-05-03 14:11:54,707 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:54,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:54,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1949569753, now seen corresponding path program 284 times [2021-05-03 14:11:54,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:54,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90803859] [2021-05-03 14:11:54,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:54,801 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:54,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90803859] [2021-05-03 14:11:54,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900507885] [2021-05-03 14:11:54,801 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 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:54,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:11:54,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:54,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:54,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:54,879 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:54,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:54,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:11:54,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130156104] [2021-05-03 14:11:54,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:11:54,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:54,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:11:54,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:54,880 INFO L87 Difference]: Start difference. First operand 41545 states and 140758 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:55,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:55,509 INFO L93 Difference]: Finished difference Result 46718 states and 157685 transitions. [2021-05-03 14:11:55,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:11:55,510 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:55,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:55,645 INFO L225 Difference]: With dead ends: 46718 [2021-05-03 14:11:55,645 INFO L226 Difference]: Without dead ends: 46714 [2021-05-03 14:11:55,645 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:11:55,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46714 states. [2021-05-03 14:11:56,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46714 to 41727. [2021-05-03 14:11:56,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41727 states, 41726 states have (on average 3.388486794804199) internal successors, (141388), 41726 states have internal predecessors, (141388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:56,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41727 states to 41727 states and 141388 transitions. [2021-05-03 14:11:56,644 INFO L78 Accepts]: Start accepts. Automaton has 41727 states and 141388 transitions. Word has length 22 [2021-05-03 14:11:56,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:56,644 INFO L480 AbstractCegarLoop]: Abstraction has 41727 states and 141388 transitions. [2021-05-03 14:11:56,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:56,644 INFO L276 IsEmpty]: Start isEmpty. Operand 41727 states and 141388 transitions. [2021-05-03 14:11:56,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:56,657 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:56,657 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:56,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24702 [2021-05-03 14:11:56,879 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:56,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:56,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1787971300, now seen corresponding path program 285 times [2021-05-03 14:11:56,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:56,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52281018] [2021-05-03 14:11:56,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:56,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:57,203 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:57,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52281018] [2021-05-03 14:11:57,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023106576] [2021-05-03 14:11:57,203 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:57,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:11:57,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:57,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:57,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:57,294 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:57,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:57,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:11:57,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281197873] [2021-05-03 14:11:57,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:11:57,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:57,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:11:57,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:57,295 INFO L87 Difference]: Start difference. First operand 41727 states and 141388 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:57,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:57,640 INFO L93 Difference]: Finished difference Result 45021 states and 151377 transitions. [2021-05-03 14:11:57,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:11:57,641 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:57,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:57,742 INFO L225 Difference]: With dead ends: 45021 [2021-05-03 14:11:57,742 INFO L226 Difference]: Without dead ends: 45021 [2021-05-03 14:11:57,742 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:11:57,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45021 states. [2021-05-03 14:11:58,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45021 to 44522. [2021-05-03 14:11:58,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44522 states, 44521 states have (on average 3.3770580175647447) internal successors, (150350), 44521 states have internal predecessors, (150350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:58,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44522 states to 44522 states and 150350 transitions. [2021-05-03 14:11:58,864 INFO L78 Accepts]: Start accepts. Automaton has 44522 states and 150350 transitions. Word has length 22 [2021-05-03 14:11:58,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:58,864 INFO L480 AbstractCegarLoop]: Abstraction has 44522 states and 150350 transitions. [2021-05-03 14:11:58,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:58,864 INFO L276 IsEmpty]: Start isEmpty. Operand 44522 states and 150350 transitions. [2021-05-03 14:11:58,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:11:58,874 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:58,874 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:59,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24703,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:59,074 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:59,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:59,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1251305955, now seen corresponding path program 286 times [2021-05-03 14:11:59,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:59,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599058310] [2021-05-03 14:11:59,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:59,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599058310] [2021-05-03 14:11:59,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864064439] [2021-05-03 14:11:59,147 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:59,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:11:59,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:59,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:11:59,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:59,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:59,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:11:59,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347092246] [2021-05-03 14:11:59,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:11:59,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:59,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:11:59,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:11:59,213 INFO L87 Difference]: Start difference. First operand 44522 states and 150350 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:59,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:59,541 INFO L93 Difference]: Finished difference Result 47600 states and 159895 transitions. [2021-05-03 14:11:59,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:11:59,542 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:11:59,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:59,672 INFO L225 Difference]: With dead ends: 47600 [2021-05-03 14:11:59,672 INFO L226 Difference]: Without dead ends: 47595 [2021-05-03 14:11:59,673 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:11:59,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47595 states. [2021-05-03 14:12:00,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47595 to 44534. [2021-05-03 14:12:00,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44534 states, 44533 states have (on average 3.377001324860216) internal successors, (150388), 44533 states have internal predecessors, (150388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:00,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44534 states to 44534 states and 150388 transitions. [2021-05-03 14:12:00,698 INFO L78 Accepts]: Start accepts. Automaton has 44534 states and 150388 transitions. Word has length 22 [2021-05-03 14:12:00,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:00,698 INFO L480 AbstractCegarLoop]: Abstraction has 44534 states and 150388 transitions. [2021-05-03 14:12:00,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:00,698 INFO L276 IsEmpty]: Start isEmpty. Operand 44534 states and 150388 transitions. [2021-05-03 14:12:00,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:00,708 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:00,708 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:00,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24704,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:00,908 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:00,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:00,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1281625034, now seen corresponding path program 287 times [2021-05-03 14:12:00,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:00,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685311317] [2021-05-03 14:12:00,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:12:00,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685311317] [2021-05-03 14:12:00,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646722069] [2021-05-03 14:12:00,977 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:01,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:12:01,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:01,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:01,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:12:01,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:01,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:12:01,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128948362] [2021-05-03 14:12:01,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:12:01,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:01,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:12:01,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:12:01,052 INFO L87 Difference]: Start difference. First operand 44534 states and 150388 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:01,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:01,270 INFO L93 Difference]: Finished difference Result 45136 states and 151973 transitions. [2021-05-03 14:12:01,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:12:01,271 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:01,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:01,359 INFO L225 Difference]: With dead ends: 45136 [2021-05-03 14:12:01,360 INFO L226 Difference]: Without dead ends: 45136 [2021-05-03 14:12:01,360 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:12:01,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45136 states. [2021-05-03 14:12:02,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45136 to 44984. [2021-05-03 14:12:02,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44984 states, 44983 states have (on average 3.373518884912078) internal successors, (151751), 44983 states have internal predecessors, (151751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:02,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44984 states to 44984 states and 151751 transitions. [2021-05-03 14:12:02,389 INFO L78 Accepts]: Start accepts. Automaton has 44984 states and 151751 transitions. Word has length 22 [2021-05-03 14:12:02,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:02,389 INFO L480 AbstractCegarLoop]: Abstraction has 44984 states and 151751 transitions. [2021-05-03 14:12:02,389 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:02,389 INFO L276 IsEmpty]: Start isEmpty. Operand 44984 states and 151751 transitions. [2021-05-03 14:12:02,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:02,398 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:02,398 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:02,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24705,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:02,599 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:02,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:02,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1694205095, now seen corresponding path program 288 times [2021-05-03 14:12:02,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:02,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017368140] [2021-05-03 14:12:02,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:02,680 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:02,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017368140] [2021-05-03 14:12:02,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935892749] [2021-05-03 14:12:02,681 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:02,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:12:02,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:02,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:02,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:02,747 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:02,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:02,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:12:02,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65328248] [2021-05-03 14:12:02,748 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:12:02,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:02,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:12:02,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:12:02,748 INFO L87 Difference]: Start difference. First operand 44984 states and 151751 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:03,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:03,084 INFO L93 Difference]: Finished difference Result 48063 states and 161244 transitions. [2021-05-03 14:12:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:12:03,085 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:03,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:03,188 INFO L225 Difference]: With dead ends: 48063 [2021-05-03 14:12:03,188 INFO L226 Difference]: Without dead ends: 48057 [2021-05-03 14:12:03,189 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:12:03,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48057 states. [2021-05-03 14:12:04,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48057 to 45252. [2021-05-03 14:12:04,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45252 states, 45251 states have (on average 3.37426797197852) internal successors, (152689), 45251 states have internal predecessors, (152689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:04,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45252 states to 45252 states and 152689 transitions. [2021-05-03 14:12:04,374 INFO L78 Accepts]: Start accepts. Automaton has 45252 states and 152689 transitions. Word has length 22 [2021-05-03 14:12:04,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:04,374 INFO L480 AbstractCegarLoop]: Abstraction has 45252 states and 152689 transitions. [2021-05-03 14:12:04,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 45252 states and 152689 transitions. [2021-05-03 14:12:04,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:04,384 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:04,384 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:04,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24706 [2021-05-03 14:12:04,585 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:04,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:04,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1530207324, now seen corresponding path program 289 times [2021-05-03 14:12:04,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:04,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934047839] [2021-05-03 14:12:04,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:04,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934047839] [2021-05-03 14:12:04,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080639003] [2021-05-03 14:12:04,659 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:04,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:04,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:04,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:04,726 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:04,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:04,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:12:04,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910866404] [2021-05-03 14:12:04,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:12:04,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:04,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:12:04,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:12:04,727 INFO L87 Difference]: Start difference. First operand 45252 states and 152689 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:05,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:05,025 INFO L93 Difference]: Finished difference Result 45494 states and 153120 transitions. [2021-05-03 14:12:05,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:12:05,026 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:05,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:05,116 INFO L225 Difference]: With dead ends: 45494 [2021-05-03 14:12:05,117 INFO L226 Difference]: Without dead ends: 45494 [2021-05-03 14:12:05,117 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 163.5ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:12:05,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45494 states. [2021-05-03 14:12:06,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45494 to 45247. [2021-05-03 14:12:06,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45247 states, 45246 states have (on average 3.37428722981037) internal successors, (152673), 45246 states have internal predecessors, (152673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:06,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45247 states to 45247 states and 152673 transitions. [2021-05-03 14:12:06,349 INFO L78 Accepts]: Start accepts. Automaton has 45247 states and 152673 transitions. Word has length 22 [2021-05-03 14:12:06,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:06,349 INFO L480 AbstractCegarLoop]: Abstraction has 45247 states and 152673 transitions. [2021-05-03 14:12:06,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:06,350 INFO L276 IsEmpty]: Start isEmpty. Operand 45247 states and 152673 transitions. [2021-05-03 14:12:06,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:06,362 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:06,362 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:06,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24707,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:06,577 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:06,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:06,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1755790749, now seen corresponding path program 290 times [2021-05-03 14:12:06,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:06,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201308324] [2021-05-03 14:12:06,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:06,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201308324] [2021-05-03 14:12:06,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690659060] [2021-05-03 14:12:06,677 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 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:12:06,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:12:06,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:06,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:06,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:06,763 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:06,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:06,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:12:06,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475763811] [2021-05-03 14:12:06,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:12:06,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:06,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:12:06,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:12:06,764 INFO L87 Difference]: Start difference. First operand 45247 states and 152673 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:07,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:07,492 INFO L93 Difference]: Finished difference Result 45858 states and 154285 transitions. [2021-05-03 14:12:07,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:12:07,493 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:07,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:07,611 INFO L225 Difference]: With dead ends: 45858 [2021-05-03 14:12:07,611 INFO L226 Difference]: Without dead ends: 45851 [2021-05-03 14:12:07,611 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 195.1ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:12:07,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45851 states. [2021-05-03 14:12:08,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45851 to 45247. [2021-05-03 14:12:08,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45247 states, 45246 states have (on average 3.374265128409141) internal successors, (152672), 45246 states have internal predecessors, (152672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:08,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45247 states to 45247 states and 152672 transitions. [2021-05-03 14:12:08,414 INFO L78 Accepts]: Start accepts. Automaton has 45247 states and 152672 transitions. Word has length 22 [2021-05-03 14:12:08,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:08,415 INFO L480 AbstractCegarLoop]: Abstraction has 45247 states and 152672 transitions. [2021-05-03 14:12:08,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:08,423 INFO L276 IsEmpty]: Start isEmpty. Operand 45247 states and 152672 transitions. [2021-05-03 14:12:08,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:08,434 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:08,434 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:08,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24708,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:08,653 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:08,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:08,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1497302794, now seen corresponding path program 291 times [2021-05-03 14:12:08,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:08,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958909783] [2021-05-03 14:12:08,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:08,889 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:08,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958909783] [2021-05-03 14:12:08,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413719099] [2021-05-03 14:12:08,889 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 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:08,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:12:08,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:08,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:08,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:08,992 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:08,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:08,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:12:08,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088553077] [2021-05-03 14:12:08,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:12:08,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:08,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:12:08,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:12:08,993 INFO L87 Difference]: Start difference. First operand 45247 states and 152672 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:09,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:09,724 INFO L93 Difference]: Finished difference Result 45606 states and 153527 transitions. [2021-05-03 14:12:09,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:12:09,725 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:09,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:09,846 INFO L225 Difference]: With dead ends: 45606 [2021-05-03 14:12:09,846 INFO L226 Difference]: Without dead ends: 45606 [2021-05-03 14:12:09,846 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 354.8ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:12:09,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45606 states. [2021-05-03 14:12:10,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45606 to 45419. [2021-05-03 14:12:10,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45419 states, 45418 states have (on average 3.3728697873089963) internal successors, (153189), 45418 states have internal predecessors, (153189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:11,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45419 states to 45419 states and 153189 transitions. [2021-05-03 14:12:11,224 INFO L78 Accepts]: Start accepts. Automaton has 45419 states and 153189 transitions. Word has length 22 [2021-05-03 14:12:11,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:11,224 INFO L480 AbstractCegarLoop]: Abstraction has 45419 states and 153189 transitions. [2021-05-03 14:12:11,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:11,225 INFO L276 IsEmpty]: Start isEmpty. Operand 45419 states and 153189 transitions. [2021-05-03 14:12:11,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:11,238 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:11,238 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:11,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24709,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:11,439 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:11,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1331479513, now seen corresponding path program 292 times [2021-05-03 14:12:11,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:11,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840566466] [2021-05-03 14:12:11,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:11,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840566466] [2021-05-03 14:12:11,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917849861] [2021-05-03 14:12:11,540 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 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:11,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:12:11,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:11,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:11,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:11,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:11,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:12:11,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143979531] [2021-05-03 14:12:11,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:12:11,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:11,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:12:11,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:12:11,617 INFO L87 Difference]: Start difference. First operand 45419 states and 153189 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:11,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:11,959 INFO L93 Difference]: Finished difference Result 46001 states and 154730 transitions. [2021-05-03 14:12:11,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:12:11,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:11,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:12,059 INFO L225 Difference]: With dead ends: 46001 [2021-05-03 14:12:12,059 INFO L226 Difference]: Without dead ends: 45993 [2021-05-03 14:12:12,059 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:12:12,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45993 states. [2021-05-03 14:12:13,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45993 to 45419. [2021-05-03 14:12:13,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45419 states, 45418 states have (on average 3.372847769606764) internal successors, (153188), 45418 states have internal predecessors, (153188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:13,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45419 states to 45419 states and 153188 transitions. [2021-05-03 14:12:13,171 INFO L78 Accepts]: Start accepts. Automaton has 45419 states and 153188 transitions. Word has length 22 [2021-05-03 14:12:13,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:13,171 INFO L480 AbstractCegarLoop]: Abstraction has 45419 states and 153188 transitions. [2021-05-03 14:12:13,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:13,171 INFO L276 IsEmpty]: Start isEmpty. Operand 45419 states and 153188 transitions. [2021-05-03 14:12:13,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:13,181 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:13,181 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:13,382 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24710 [2021-05-03 14:12:13,382 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:13,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:13,382 INFO L82 PathProgramCache]: Analyzing trace with hash 860835940, now seen corresponding path program 293 times [2021-05-03 14:12:13,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:13,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199578860] [2021-05-03 14:12:13,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:13,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199578860] [2021-05-03 14:12:13,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904057704] [2021-05-03 14:12:13,480 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 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:13,503 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:12:13,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:13,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:13,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:13,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:13,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:12:13,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022537247] [2021-05-03 14:12:13,564 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:12:13,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:13,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:12:13,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:12:13,564 INFO L87 Difference]: Start difference. First operand 45419 states and 153188 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:14,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:14,039 INFO L93 Difference]: Finished difference Result 45708 states and 153807 transitions. [2021-05-03 14:12:14,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:12:14,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:14,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:14,165 INFO L225 Difference]: With dead ends: 45708 [2021-05-03 14:12:14,165 INFO L226 Difference]: Without dead ends: 45708 [2021-05-03 14:12:14,166 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=366, Invalid=824, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:12:14,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45708 states. [2021-05-03 14:12:15,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45708 to 45500. [2021-05-03 14:12:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45500 states, 45499 states have (on average 3.372184004044045) internal successors, (153431), 45499 states have internal predecessors, (153431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:15,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45500 states to 45500 states and 153431 transitions. [2021-05-03 14:12:15,371 INFO L78 Accepts]: Start accepts. Automaton has 45500 states and 153431 transitions. Word has length 22 [2021-05-03 14:12:15,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:15,372 INFO L480 AbstractCegarLoop]: Abstraction has 45500 states and 153431 transitions. [2021-05-03 14:12:15,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:15,372 INFO L276 IsEmpty]: Start isEmpty. Operand 45500 states and 153431 transitions. [2021-05-03 14:12:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:15,384 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:15,384 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:15,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24711,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:15,597 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:15,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1062733085, now seen corresponding path program 294 times [2021-05-03 14:12:15,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:15,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722768841] [2021-05-03 14:12:15,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:15,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722768841] [2021-05-03 14:12:15,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848748573] [2021-05-03 14:12:15,711 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 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:15,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:12:15,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:15,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:15,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:15,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:15,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:12:15,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006753271] [2021-05-03 14:12:15,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:12:15,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:15,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:12:15,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:12:15,794 INFO L87 Difference]: Start difference. First operand 45500 states and 153431 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:16,184 INFO L93 Difference]: Finished difference Result 46053 states and 154900 transitions. [2021-05-03 14:12:16,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:12:16,185 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:16,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:16,301 INFO L225 Difference]: With dead ends: 46053 [2021-05-03 14:12:16,301 INFO L226 Difference]: Without dead ends: 46044 [2021-05-03 14:12:16,301 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 227.1ms TimeCoverageRelationStatistics Valid=262, Invalid=550, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:12:16,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46044 states. [2021-05-03 14:12:17,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46044 to 45500. [2021-05-03 14:12:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45500 states, 45499 states have (on average 3.372162025539023) internal successors, (153430), 45499 states have internal predecessors, (153430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:17,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45500 states to 45500 states and 153430 transitions. [2021-05-03 14:12:17,582 INFO L78 Accepts]: Start accepts. Automaton has 45500 states and 153430 transitions. Word has length 22 [2021-05-03 14:12:17,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:17,582 INFO L480 AbstractCegarLoop]: Abstraction has 45500 states and 153430 transitions. [2021-05-03 14:12:17,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand 45500 states and 153430 transitions. [2021-05-03 14:12:17,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:17,593 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:17,593 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:17,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24712 [2021-05-03 14:12:17,793 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:17,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:17,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1689767350, now seen corresponding path program 295 times [2021-05-03 14:12:17,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:17,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074285582] [2021-05-03 14:12:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:17,895 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:17,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074285582] [2021-05-03 14:12:17,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858072082] [2021-05-03 14:12:17,895 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:17,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:17,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:17,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:17,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:17,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:12:17,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222527112] [2021-05-03 14:12:17,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:12:17,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:17,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:12:17,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:12:17,982 INFO L87 Difference]: Start difference. First operand 45500 states and 153430 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:18,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:18,537 INFO L93 Difference]: Finished difference Result 45887 states and 154289 transitions. [2021-05-03 14:12:18,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-03 14:12:18,538 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:18,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:18,635 INFO L225 Difference]: With dead ends: 45887 [2021-05-03 14:12:18,635 INFO L226 Difference]: Without dead ends: 45887 [2021-05-03 14:12:18,636 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 380.8ms TimeCoverageRelationStatistics Valid=591, Invalid=1215, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:12:18,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45887 states. [2021-05-03 14:12:19,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45887 to 45536. [2021-05-03 14:12:19,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45536 states, 45535 states have (on average 3.371867794004612) internal successors, (153538), 45535 states have internal predecessors, (153538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:19,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45536 states to 45536 states and 153538 transitions. [2021-05-03 14:12:19,768 INFO L78 Accepts]: Start accepts. Automaton has 45536 states and 153538 transitions. Word has length 22 [2021-05-03 14:12:19,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:19,768 INFO L480 AbstractCegarLoop]: Abstraction has 45536 states and 153538 transitions. [2021-05-03 14:12:19,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:19,768 INFO L276 IsEmpty]: Start isEmpty. Operand 45536 states and 153538 transitions. [2021-05-03 14:12:19,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:19,778 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:19,778 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:19,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24713 [2021-05-03 14:12:19,978 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:19,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:19,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1321528409, now seen corresponding path program 296 times [2021-05-03 14:12:19,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:19,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289746182] [2021-05-03 14:12:19,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:19,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:20,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289746182] [2021-05-03 14:12:20,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917187870] [2021-05-03 14:12:20,074 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:20,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:12:20,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:20,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:20,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:20,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:20,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:12:20,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332078185] [2021-05-03 14:12:20,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:12:20,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:20,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:12:20,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:12:20,140 INFO L87 Difference]: Start difference. First operand 45536 states and 153538 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:20,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:20,807 INFO L93 Difference]: Finished difference Result 46048 states and 154924 transitions. [2021-05-03 14:12:20,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:12:20,809 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:20,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:20,911 INFO L225 Difference]: With dead ends: 46048 [2021-05-03 14:12:20,911 INFO L226 Difference]: Without dead ends: 46038 [2021-05-03 14:12:20,911 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:12:20,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46038 states. [2021-05-03 14:12:21,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46038 to 45536. [2021-05-03 14:12:21,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45536 states, 45535 states have (on average 3.3718458328758096) internal successors, (153537), 45535 states have internal predecessors, (153537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45536 states to 45536 states and 153537 transitions. [2021-05-03 14:12:21,624 INFO L78 Accepts]: Start accepts. Automaton has 45536 states and 153537 transitions. Word has length 22 [2021-05-03 14:12:21,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:21,624 INFO L480 AbstractCegarLoop]: Abstraction has 45536 states and 153537 transitions. [2021-05-03 14:12:21,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:21,624 INFO L276 IsEmpty]: Start isEmpty. Operand 45536 states and 153537 transitions. [2021-05-03 14:12:21,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:21,634 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:21,634 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:21,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24714 [2021-05-03 14:12:21,835 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:21,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:21,835 INFO L82 PathProgramCache]: Analyzing trace with hash 845909284, now seen corresponding path program 297 times [2021-05-03 14:12:21,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:21,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667880126] [2021-05-03 14:12:21,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:21,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667880126] [2021-05-03 14:12:21,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859816336] [2021-05-03 14:12:21,953 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:21,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:12:21,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:21,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:21,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:22,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:22,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-03 14:12:22,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628244581] [2021-05-03 14:12:22,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:12:22,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:22,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:12:22,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:12:22,033 INFO L87 Difference]: Start difference. First operand 45536 states and 153537 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:22,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:22,838 INFO L93 Difference]: Finished difference Result 46288 states and 155435 transitions. [2021-05-03 14:12:22,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-03 14:12:22,839 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:12:22,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:22,936 INFO L225 Difference]: With dead ends: 46288 [2021-05-03 14:12:22,936 INFO L226 Difference]: Without dead ends: 46288 [2021-05-03 14:12:22,936 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 656.8ms TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2021-05-03 14:12:22,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46288 states. [2021-05-03 14:12:23,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46288 to 45559. [2021-05-03 14:12:24,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45559 states, 45558 states have (on average 3.371658106150402) internal successors, (153606), 45558 states have internal predecessors, (153606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:24,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45559 states to 45559 states and 153606 transitions. [2021-05-03 14:12:24,195 INFO L78 Accepts]: Start accepts. Automaton has 45559 states and 153606 transitions. Word has length 22 [2021-05-03 14:12:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:24,195 INFO L480 AbstractCegarLoop]: Abstraction has 45559 states and 153606 transitions. [2021-05-03 14:12:24,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:24,195 INFO L276 IsEmpty]: Start isEmpty. Operand 45559 states and 153606 transitions. [2021-05-03 14:12:24,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:24,209 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:24,209 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:24,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24715,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:24,432 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:24,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:24,433 INFO L82 PathProgramCache]: Analyzing trace with hash -141325697, now seen corresponding path program 298 times [2021-05-03 14:12:24,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:24,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077042444] [2021-05-03 14:12:24,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:24,538 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:24,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077042444] [2021-05-03 14:12:24,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683401088] [2021-05-03 14:12:24,539 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:24,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:12:24,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:24,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:24,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:24,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:24,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-03 14:12:24,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657857361] [2021-05-03 14:12:24,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:12:24,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:24,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:12:24,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:12:24,626 INFO L87 Difference]: Start difference. First operand 45559 states and 153606 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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) [2021-05-03 14:12:25,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:25,024 INFO L93 Difference]: Finished difference Result 45869 states and 154129 transitions. [2021-05-03 14:12:25,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:12:25,029 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 22 [2021-05-03 14:12:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:25,166 INFO L225 Difference]: With dead ends: 45869 [2021-05-03 14:12:25,166 INFO L226 Difference]: Without dead ends: 45869 [2021-05-03 14:12:25,167 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:12:25,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45869 states. [2021-05-03 14:12:26,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45869 to 45461. [2021-05-03 14:12:26,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45461 states, 45460 states have (on average 3.3717553893532775) internal successors, (153280), 45460 states have internal predecessors, (153280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:26,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45461 states to 45461 states and 153280 transitions. [2021-05-03 14:12:26,576 INFO L78 Accepts]: Start accepts. Automaton has 45461 states and 153280 transitions. Word has length 22 [2021-05-03 14:12:26,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:26,577 INFO L480 AbstractCegarLoop]: Abstraction has 45461 states and 153280 transitions. [2021-05-03 14:12:26,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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) [2021-05-03 14:12:26,577 INFO L276 IsEmpty]: Start isEmpty. Operand 45461 states and 153280 transitions. [2021-05-03 14:12:26,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:26,590 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:26,590 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:26,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24716 [2021-05-03 14:12:26,813 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:26,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:26,813 INFO L82 PathProgramCache]: Analyzing trace with hash -919069942, now seen corresponding path program 299 times [2021-05-03 14:12:26,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:26,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724477809] [2021-05-03 14:12:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:26,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724477809] [2021-05-03 14:12:26,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655617836] [2021-05-03 14:12:26,933 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 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:27,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:12:27,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:27,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:27,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:27,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:27,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-05-03 14:12:27,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345593181] [2021-05-03 14:12:27,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:12:27,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:27,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:12:27,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:12:27,085 INFO L87 Difference]: Start difference. First operand 45461 states and 153280 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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) [2021-05-03 14:12:27,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:27,630 INFO L93 Difference]: Finished difference Result 45757 states and 153693 transitions. [2021-05-03 14:12:27,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 14:12:27,630 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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 22 [2021-05-03 14:12:27,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:27,749 INFO L225 Difference]: With dead ends: 45757 [2021-05-03 14:12:27,749 INFO L226 Difference]: Without dead ends: 45753 [2021-05-03 14:12:27,749 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 319.5ms TimeCoverageRelationStatistics Valid=386, Invalid=736, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:12:27,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45753 states. [2021-05-03 14:12:28,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45753 to 45416. [2021-05-03 14:12:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45416 states, 45415 states have (on average 3.3715952879004734) internal successors, (153121), 45415 states have internal predecessors, (153121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:29,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45416 states to 45416 states and 153121 transitions. [2021-05-03 14:12:29,079 INFO L78 Accepts]: Start accepts. Automaton has 45416 states and 153121 transitions. Word has length 22 [2021-05-03 14:12:29,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:29,079 INFO L480 AbstractCegarLoop]: Abstraction has 45416 states and 153121 transitions. [2021-05-03 14:12:29,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 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) [2021-05-03 14:12:29,080 INFO L276 IsEmpty]: Start isEmpty. Operand 45416 states and 153121 transitions. [2021-05-03 14:12:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:29,092 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:29,092 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:29,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24717,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:29,307 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:29,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:29,307 INFO L82 PathProgramCache]: Analyzing trace with hash 931954525, now seen corresponding path program 300 times [2021-05-03 14:12:29,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:29,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294787467] [2021-05-03 14:12:29,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:29,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294787467] [2021-05-03 14:12:29,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662796363] [2021-05-03 14:12:29,407 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 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:29,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:12:29,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:29,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:29,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:29,502 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:29,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:29,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:12:29,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143879790] [2021-05-03 14:12:29,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:29,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:29,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:29,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:29,503 INFO L87 Difference]: Start difference. First operand 45416 states and 153121 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:29,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:29,948 INFO L93 Difference]: Finished difference Result 45997 states and 154677 transitions. [2021-05-03 14:12:29,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:12:29,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:12:29,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:30,071 INFO L225 Difference]: With dead ends: 45997 [2021-05-03 14:12:30,071 INFO L226 Difference]: Without dead ends: 45990 [2021-05-03 14:12:30,071 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:12:30,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45990 states. [2021-05-03 14:12:31,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45990 to 45416. [2021-05-03 14:12:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45416 states, 45415 states have (on average 3.371573268743807) internal successors, (153120), 45415 states have internal predecessors, (153120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:31,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45416 states to 45416 states and 153120 transitions. [2021-05-03 14:12:31,465 INFO L78 Accepts]: Start accepts. Automaton has 45416 states and 153120 transitions. Word has length 22 [2021-05-03 14:12:31,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:31,466 INFO L480 AbstractCegarLoop]: Abstraction has 45416 states and 153120 transitions. [2021-05-03 14:12:31,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:31,466 INFO L276 IsEmpty]: Start isEmpty. Operand 45416 states and 153120 transitions. [2021-05-03 14:12:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:31,477 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:31,477 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:31,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24718,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:31,693 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:31,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:31,693 INFO L82 PathProgramCache]: Analyzing trace with hash 673466570, now seen corresponding path program 301 times [2021-05-03 14:12:31,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:31,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4263088] [2021-05-03 14:12:31,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:31,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:31,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4263088] [2021-05-03 14:12:31,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427808684] [2021-05-03 14:12:31,806 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 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:12:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:31,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:31,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:31,909 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:31,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:31,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:12:31,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867852856] [2021-05-03 14:12:31,910 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:31,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:31,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:31,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:31,910 INFO L87 Difference]: Start difference. First operand 45416 states and 153120 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:33,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:33,155 INFO L93 Difference]: Finished difference Result 53135 states and 176578 transitions. [2021-05-03 14:12:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-03 14:12:33,156 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:12:33,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:33,332 INFO L225 Difference]: With dead ends: 53135 [2021-05-03 14:12:33,332 INFO L226 Difference]: Without dead ends: 53135 [2021-05-03 14:12:33,332 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 570.5ms TimeCoverageRelationStatistics Valid=924, Invalid=1832, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 14:12:33,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53135 states. [2021-05-03 14:12:34,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53135 to 47539. [2021-05-03 14:12:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47539 states, 47538 states have (on average 3.3566199671841472) internal successors, (159567), 47538 states have internal predecessors, (159567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:34,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47539 states to 47539 states and 159567 transitions. [2021-05-03 14:12:34,845 INFO L78 Accepts]: Start accepts. Automaton has 47539 states and 159567 transitions. Word has length 22 [2021-05-03 14:12:34,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:34,845 INFO L480 AbstractCegarLoop]: Abstraction has 47539 states and 159567 transitions. [2021-05-03 14:12:34,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 47539 states and 159567 transitions. [2021-05-03 14:12:34,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:34,860 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:34,860 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:35,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24719,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:35,073 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:35,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:35,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1618648765, now seen corresponding path program 302 times [2021-05-03 14:12:35,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:35,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241817873] [2021-05-03 14:12:35,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:35,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241817873] [2021-05-03 14:12:35,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332905105] [2021-05-03 14:12:35,180 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 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:35,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:12:35,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:35,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:35,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:35,273 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:35,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:35,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:12:35,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139049375] [2021-05-03 14:12:35,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:35,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:35,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:35,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:35,274 INFO L87 Difference]: Start difference. First operand 47539 states and 159567 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:35,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:35,701 INFO L93 Difference]: Finished difference Result 48476 states and 162116 transitions. [2021-05-03 14:12:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:12:35,702 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:12:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:35,799 INFO L225 Difference]: With dead ends: 48476 [2021-05-03 14:12:35,799 INFO L226 Difference]: Without dead ends: 48469 [2021-05-03 14:12:35,800 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:12:35,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48469 states. [2021-05-03 14:12:36,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48469 to 47569. [2021-05-03 14:12:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47569 states, 47568 states have (on average 3.3566473259334004) internal successors, (159669), 47568 states have internal predecessors, (159669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:37,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47569 states to 47569 states and 159669 transitions. [2021-05-03 14:12:37,059 INFO L78 Accepts]: Start accepts. Automaton has 47569 states and 159669 transitions. Word has length 22 [2021-05-03 14:12:37,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:37,059 INFO L480 AbstractCegarLoop]: Abstraction has 47569 states and 159669 transitions. [2021-05-03 14:12:37,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:37,059 INFO L276 IsEmpty]: Start isEmpty. Operand 47569 states and 159669 transitions. [2021-05-03 14:12:37,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:37,072 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:37,072 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:37,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24720 [2021-05-03 14:12:37,289 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:37,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:37,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1877136720, now seen corresponding path program 303 times [2021-05-03 14:12:37,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:37,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114009611] [2021-05-03 14:12:37,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:37,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114009611] [2021-05-03 14:12:37,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24265313] [2021-05-03 14:12:37,395 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 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:37,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:12:37,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:37,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:37,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:37,484 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:37,484 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:37,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:12:37,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590280380] [2021-05-03 14:12:37,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:37,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:37,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:37,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:37,484 INFO L87 Difference]: Start difference. First operand 47569 states and 159669 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:38,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:38,125 INFO L93 Difference]: Finished difference Result 49325 states and 164443 transitions. [2021-05-03 14:12:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 14:12:38,126 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:12:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:38,225 INFO L225 Difference]: With dead ends: 49325 [2021-05-03 14:12:38,225 INFO L226 Difference]: Without dead ends: 49325 [2021-05-03 14:12:38,225 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 424.5ms TimeCoverageRelationStatistics Valid=862, Invalid=1688, Unknown=0, NotChecked=0, Total=2550 [2021-05-03 14:12:38,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49325 states. [2021-05-03 14:12:39,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49325 to 47248. [2021-05-03 14:12:39,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47248 states, 47247 states have (on average 3.3590915825343406) internal successors, (158707), 47247 states have internal predecessors, (158707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:39,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47248 states to 47248 states and 158707 transitions. [2021-05-03 14:12:39,537 INFO L78 Accepts]: Start accepts. Automaton has 47248 states and 158707 transitions. Word has length 22 [2021-05-03 14:12:39,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:39,537 INFO L480 AbstractCegarLoop]: Abstraction has 47248 states and 158707 transitions. [2021-05-03 14:12:39,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:39,537 INFO L276 IsEmpty]: Start isEmpty. Operand 47248 states and 158707 transitions. [2021-05-03 14:12:39,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:39,549 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:39,549 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:39,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24721 [2021-05-03 14:12:39,749 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:39,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:39,750 INFO L82 PathProgramCache]: Analyzing trace with hash -2042960001, now seen corresponding path program 304 times [2021-05-03 14:12:39,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:39,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32169665] [2021-05-03 14:12:39,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:39,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32169665] [2021-05-03 14:12:39,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44263962] [2021-05-03 14:12:39,852 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 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:39,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:12:39,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:39,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:39,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:39,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:39,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:12:39,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726666541] [2021-05-03 14:12:39,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:39,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:39,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:39,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:39,930 INFO L87 Difference]: Start difference. First operand 47248 states and 158707 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:40,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:40,600 INFO L93 Difference]: Finished difference Result 47656 states and 159788 transitions. [2021-05-03 14:12:40,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:12:40,601 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:12:40,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:40,695 INFO L225 Difference]: With dead ends: 47656 [2021-05-03 14:12:40,696 INFO L226 Difference]: Without dead ends: 47648 [2021-05-03 14:12:40,696 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:12:40,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47648 states. [2021-05-03 14:12:41,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47648 to 47248. [2021-05-03 14:12:41,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47248 states, 47247 states have (on average 3.359070417169344) internal successors, (158706), 47247 states have internal predecessors, (158706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:41,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47248 states to 47248 states and 158706 transitions. [2021-05-03 14:12:41,519 INFO L78 Accepts]: Start accepts. Automaton has 47248 states and 158706 transitions. Word has length 22 [2021-05-03 14:12:41,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:41,519 INFO L480 AbstractCegarLoop]: Abstraction has 47248 states and 158706 transitions. [2021-05-03 14:12:41,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:41,519 INFO L276 IsEmpty]: Start isEmpty. Operand 47248 states and 158706 transitions. [2021-05-03 14:12:41,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:41,530 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:41,530 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:41,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24722 [2021-05-03 14:12:41,730 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:41,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:41,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1781363722, now seen corresponding path program 305 times [2021-05-03 14:12:41,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:41,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716504491] [2021-05-03 14:12:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:41,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:42,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716504491] [2021-05-03 14:12:42,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329971040] [2021-05-03 14:12:42,197 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 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:42,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:12:42,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:42,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:42,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:42,532 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:42,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:42,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:12:42,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499940600] [2021-05-03 14:12:42,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:42,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:42,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:42,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:42,533 INFO L87 Difference]: Start difference. First operand 47248 states and 158706 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:43,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:43,374 INFO L93 Difference]: Finished difference Result 49120 states and 163790 transitions. [2021-05-03 14:12:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 14:12:43,375 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:12:43,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:43,511 INFO L225 Difference]: With dead ends: 49120 [2021-05-03 14:12:43,511 INFO L226 Difference]: Without dead ends: 49120 [2021-05-03 14:12:43,512 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 859.2ms TimeCoverageRelationStatistics Valid=1014, Invalid=2066, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 14:12:43,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49120 states. [2021-05-03 14:12:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49120 to 47283. [2021-05-03 14:12:44,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47283 states, 47282 states have (on average 3.3595448585085235) internal successors, (158846), 47282 states have internal predecessors, (158846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47283 states to 47283 states and 158846 transitions. [2021-05-03 14:12:44,799 INFO L78 Accepts]: Start accepts. Automaton has 47283 states and 158846 transitions. Word has length 22 [2021-05-03 14:12:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:44,799 INFO L480 AbstractCegarLoop]: Abstraction has 47283 states and 158846 transitions. [2021-05-03 14:12:44,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:44,799 INFO L276 IsEmpty]: Start isEmpty. Operand 47283 states and 158846 transitions. [2021-05-03 14:12:44,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:44,814 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:44,814 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:45,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24723 [2021-05-03 14:12:45,029 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:45,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:45,029 INFO L82 PathProgramCache]: Analyzing trace with hash 917027869, now seen corresponding path program 306 times [2021-05-03 14:12:45,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:45,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998207156] [2021-05-03 14:12:45,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 33 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:45,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998207156] [2021-05-03 14:12:45,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298795507] [2021-05-03 14:12:45,142 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 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:45,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:12:45,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:45,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:45,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 34 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:45,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:45,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:12:45,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783069191] [2021-05-03 14:12:45,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:45,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:45,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:45,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:45,713 INFO L87 Difference]: Start difference. First operand 47283 states and 158846 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:46,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:46,149 INFO L93 Difference]: Finished difference Result 48602 states and 162549 transitions. [2021-05-03 14:12:46,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:12:46,150 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:12:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:46,282 INFO L225 Difference]: With dead ends: 48602 [2021-05-03 14:12:46,282 INFO L226 Difference]: Without dead ends: 48595 [2021-05-03 14:12:46,283 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 550.5ms TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:12:46,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48595 states. [2021-05-03 14:12:47,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48595 to 47301. [2021-05-03 14:12:47,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47301 states, 47300 states have (on average 3.3595771670190273) internal successors, (158908), 47300 states have internal predecessors, (158908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:47,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47301 states to 47301 states and 158908 transitions. [2021-05-03 14:12:47,762 INFO L78 Accepts]: Start accepts. Automaton has 47301 states and 158908 transitions. Word has length 22 [2021-05-03 14:12:47,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:47,762 INFO L480 AbstractCegarLoop]: Abstraction has 47301 states and 158908 transitions. [2021-05-03 14:12:47,762 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 47301 states and 158908 transitions. [2021-05-03 14:12:47,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:47,776 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:47,776 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:47,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24724 [2021-05-03 14:12:47,998 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:47,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:47,998 INFO L82 PathProgramCache]: Analyzing trace with hash 658539914, now seen corresponding path program 307 times [2021-05-03 14:12:47,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:47,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884642310] [2021-05-03 14:12:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:48,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884642310] [2021-05-03 14:12:48,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082668570] [2021-05-03 14:12:48,104 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:12:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:48,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:48,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:48,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:48,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:12:48,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412850061] [2021-05-03 14:12:48,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:48,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:48,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:48,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:48,207 INFO L87 Difference]: Start difference. First operand 47301 states and 158908 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:48,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:48,885 INFO L93 Difference]: Finished difference Result 47967 states and 160441 transitions. [2021-05-03 14:12:48,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-03 14:12:48,886 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:12:48,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:49,015 INFO L225 Difference]: With dead ends: 47967 [2021-05-03 14:12:49,015 INFO L226 Difference]: Without dead ends: 47967 [2021-05-03 14:12:49,015 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 460.8ms TimeCoverageRelationStatistics Valid=765, Invalid=1491, Unknown=0, NotChecked=0, Total=2256 [2021-05-03 14:12:49,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47967 states. [2021-05-03 14:12:50,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47967 to 47235. [2021-05-03 14:12:50,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47235 states, 47234 states have (on average 3.360291315577762) internal successors, (158720), 47234 states have internal predecessors, (158720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47235 states to 47235 states and 158720 transitions. [2021-05-03 14:12:50,387 INFO L78 Accepts]: Start accepts. Automaton has 47235 states and 158720 transitions. Word has length 22 [2021-05-03 14:12:50,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:50,387 INFO L480 AbstractCegarLoop]: Abstraction has 47235 states and 158720 transitions. [2021-05-03 14:12:50,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 47235 states and 158720 transitions. [2021-05-03 14:12:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:50,401 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:50,401 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:50,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24725 [2021-05-03 14:12:50,623 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:50,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:50,623 INFO L82 PathProgramCache]: Analyzing trace with hash 492716633, now seen corresponding path program 308 times [2021-05-03 14:12:50,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:50,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453647445] [2021-05-03 14:12:50,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:50,727 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:50,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453647445] [2021-05-03 14:12:50,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071707024] [2021-05-03 14:12:50,728 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 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:50,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:12:50,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:50,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:50,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:50,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:50,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:12:50,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944557781] [2021-05-03 14:12:50,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:50,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:50,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:50,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:50,819 INFO L87 Difference]: Start difference. First operand 47235 states and 158720 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:51,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:51,502 INFO L93 Difference]: Finished difference Result 47714 states and 159972 transitions. [2021-05-03 14:12:51,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:12:51,503 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:12:51,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:51,602 INFO L225 Difference]: With dead ends: 47714 [2021-05-03 14:12:51,602 INFO L226 Difference]: Without dead ends: 47706 [2021-05-03 14:12:51,603 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:12:51,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47706 states. [2021-05-03 14:12:52,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47706 to 47235. [2021-05-03 14:12:52,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47235 states, 47234 states have (on average 3.3602701443875174) internal successors, (158719), 47234 states have internal predecessors, (158719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:52,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47235 states to 47235 states and 158719 transitions. [2021-05-03 14:12:52,861 INFO L78 Accepts]: Start accepts. Automaton has 47235 states and 158719 transitions. Word has length 22 [2021-05-03 14:12:52,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:52,861 INFO L480 AbstractCegarLoop]: Abstraction has 47235 states and 158719 transitions. [2021-05-03 14:12:52,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:52,861 INFO L276 IsEmpty]: Start isEmpty. Operand 47235 states and 158719 transitions. [2021-05-03 14:12:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:52,876 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:52,876 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:53,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24726,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:53,097 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:53,097 INFO L82 PathProgramCache]: Analyzing trace with hash 22073060, now seen corresponding path program 309 times [2021-05-03 14:12:53,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:53,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123681627] [2021-05-03 14:12:53,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:53,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:53,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123681627] [2021-05-03 14:12:53,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029934146] [2021-05-03 14:12:53,191 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 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:53,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:12:53,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:53,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:53,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:53,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:53,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:12:53,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056983020] [2021-05-03 14:12:53,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:53,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:53,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:53,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:53,275 INFO L87 Difference]: Start difference. First operand 47235 states and 158719 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:53,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:53,918 INFO L93 Difference]: Finished difference Result 47933 states and 160397 transitions. [2021-05-03 14:12:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-03 14:12:53,919 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:12:53,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:54,022 INFO L225 Difference]: With dead ends: 47933 [2021-05-03 14:12:54,022 INFO L226 Difference]: Without dead ends: 47933 [2021-05-03 14:12:54,023 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 458.0ms TimeCoverageRelationStatistics Valid=921, Invalid=1835, Unknown=0, NotChecked=0, Total=2756 [2021-05-03 14:12:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47933 states. [2021-05-03 14:12:54,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47933 to 47173. [2021-05-03 14:12:54,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47173 states, 47172 states have (on average 3.3607648605104723) internal successors, (158534), 47172 states have internal predecessors, (158534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:55,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47173 states to 47173 states and 158534 transitions. [2021-05-03 14:12:55,101 INFO L78 Accepts]: Start accepts. Automaton has 47173 states and 158534 transitions. Word has length 22 [2021-05-03 14:12:55,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:55,101 INFO L480 AbstractCegarLoop]: Abstraction has 47173 states and 158534 transitions. [2021-05-03 14:12:55,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:55,101 INFO L276 IsEmpty]: Start isEmpty. Operand 47173 states and 158534 transitions. [2021-05-03 14:12:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:55,113 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:55,113 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:55,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24727,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:55,313 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:55,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:55,314 INFO L82 PathProgramCache]: Analyzing trace with hash 223970205, now seen corresponding path program 310 times [2021-05-03 14:12:55,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:55,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034349229] [2021-05-03 14:12:55,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:55,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:55,443 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:55,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034349229] [2021-05-03 14:12:55,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28830345] [2021-05-03 14:12:55,444 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 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:55,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:12:55,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:55,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:55,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:55,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:55,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:12:55,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794038141] [2021-05-03 14:12:55,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:55,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:55,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:55,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:55,522 INFO L87 Difference]: Start difference. First operand 47173 states and 158534 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:55,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:55,897 INFO L93 Difference]: Finished difference Result 47617 states and 159719 transitions. [2021-05-03 14:12:55,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:12:55,898 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:12:55,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:56,018 INFO L225 Difference]: With dead ends: 47617 [2021-05-03 14:12:56,018 INFO L226 Difference]: Without dead ends: 47608 [2021-05-03 14:12:56,019 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:12:56,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47608 states. [2021-05-03 14:12:57,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47608 to 47173. [2021-05-03 14:12:57,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47173 states, 47172 states have (on average 3.360743661494107) internal successors, (158533), 47172 states have internal predecessors, (158533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47173 states to 47173 states and 158533 transitions. [2021-05-03 14:12:57,176 INFO L78 Accepts]: Start accepts. Automaton has 47173 states and 158533 transitions. Word has length 22 [2021-05-03 14:12:57,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:57,176 INFO L480 AbstractCegarLoop]: Abstraction has 47173 states and 158533 transitions. [2021-05-03 14:12:57,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:57,176 INFO L276 IsEmpty]: Start isEmpty. Operand 47173 states and 158533 transitions. [2021-05-03 14:12:57,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:57,187 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:57,187 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:57,388 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24728 [2021-05-03 14:12:57,389 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:57,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1766437066, now seen corresponding path program 311 times [2021-05-03 14:12:57,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:57,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633410435] [2021-05-03 14:12:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:57,493 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:57,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633410435] [2021-05-03 14:12:57,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838574386] [2021-05-03 14:12:57,493 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 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:57,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:12:57,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:57,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:12:57,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:57,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:57,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:12:57,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653897942] [2021-05-03 14:12:57,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:12:57,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:57,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:12:57,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:12:57,580 INFO L87 Difference]: Start difference. First operand 47173 states and 158533 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:58,519 INFO L93 Difference]: Finished difference Result 48412 states and 161872 transitions. [2021-05-03 14:12:58,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-03 14:12:58,520 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:12:58,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:58,640 INFO L225 Difference]: With dead ends: 48412 [2021-05-03 14:12:58,640 INFO L226 Difference]: Without dead ends: 48412 [2021-05-03 14:12:58,641 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 662.0ms TimeCoverageRelationStatistics Valid=1002, Invalid=2078, Unknown=0, NotChecked=0, Total=3080 [2021-05-03 14:12:59,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48412 states. [2021-05-03 14:12:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48412 to 47155. [2021-05-03 14:12:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47155 states, 47154 states have (on average 3.360881367434364) internal successors, (158479), 47154 states have internal predecessors, (158479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:59,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47155 states to 47155 states and 158479 transitions. [2021-05-03 14:12:59,906 INFO L78 Accepts]: Start accepts. Automaton has 47155 states and 158479 transitions. Word has length 22 [2021-05-03 14:12:59,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:59,906 INFO L480 AbstractCegarLoop]: Abstraction has 47155 states and 158479 transitions. [2021-05-03 14:12:59,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:12:59,906 INFO L276 IsEmpty]: Start isEmpty. Operand 47155 states and 158479 transitions. [2021-05-03 14:12:59,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:12:59,917 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:59,917 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:00,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24729,313 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:00,118 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:00,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:00,119 INFO L82 PathProgramCache]: Analyzing trace with hash -2081375101, now seen corresponding path program 312 times [2021-05-03 14:13:00,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:00,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986963133] [2021-05-03 14:13:00,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:00,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986963133] [2021-05-03 14:13:00,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267435767] [2021-05-03 14:13:00,241 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 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:13:00,278 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:13:00,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:00,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:00,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:00,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:00,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:13:00,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823605680] [2021-05-03 14:13:00,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:00,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:00,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:00,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:00,349 INFO L87 Difference]: Start difference. First operand 47155 states and 158479 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:13:00,869 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-05-03 14:13:01,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:01,088 INFO L93 Difference]: Finished difference Result 49039 states and 163954 transitions. [2021-05-03 14:13:01,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:13:01,097 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:13:01,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:01,229 INFO L225 Difference]: With dead ends: 49039 [2021-05-03 14:13:01,229 INFO L226 Difference]: Without dead ends: 49032 [2021-05-03 14:13:01,229 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 526.8ms TimeCoverageRelationStatistics Valid=296, Invalid=634, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:13:01,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49032 states. [2021-05-03 14:13:02,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49032 to 47173. [2021-05-03 14:13:02,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47173 states, 47172 states have (on average 3.3609132536250317) internal successors, (158541), 47172 states have internal predecessors, (158541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:02,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47173 states to 47173 states and 158541 transitions. [2021-05-03 14:13:02,670 INFO L78 Accepts]: Start accepts. Automaton has 47173 states and 158541 transitions. Word has length 22 [2021-05-03 14:13:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:02,670 INFO L480 AbstractCegarLoop]: Abstraction has 47173 states and 158541 transitions. [2021-05-03 14:13:02,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:13:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 47173 states and 158541 transitions. [2021-05-03 14:13:02,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:02,681 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:02,681 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:02,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24730 [2021-05-03 14:13:02,882 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:02,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:02,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1955104240, now seen corresponding path program 313 times [2021-05-03 14:13:02,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:02,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653131719] [2021-05-03 14:13:02,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:03,003 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:03,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653131719] [2021-05-03 14:13:03,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006197511] [2021-05-03 14:13:03,003 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 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:03,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:03,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:03,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:03,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:13:03,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116080680] [2021-05-03 14:13:03,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:03,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:03,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:03,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:03,105 INFO L87 Difference]: Start difference. First operand 47173 states and 158541 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:13:03,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:03,787 INFO L93 Difference]: Finished difference Result 47579 states and 159437 transitions. [2021-05-03 14:13:03,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 14:13:03,788 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:13:03,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:03,929 INFO L225 Difference]: With dead ends: 47579 [2021-05-03 14:13:03,930 INFO L226 Difference]: Without dead ends: 47579 [2021-05-03 14:13:03,930 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 458.2ms TimeCoverageRelationStatistics Valid=692, Invalid=1378, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 14:13:03,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47579 states. [2021-05-03 14:13:05,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47579 to 47191. [2021-05-03 14:13:05,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47191 states, 47190 states have (on average 3.3607967789785973) internal successors, (158596), 47190 states have internal predecessors, (158596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47191 states to 47191 states and 158596 transitions. [2021-05-03 14:13:05,326 INFO L78 Accepts]: Start accepts. Automaton has 47191 states and 158596 transitions. Word has length 22 [2021-05-03 14:13:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:05,326 INFO L480 AbstractCegarLoop]: Abstraction has 47191 states and 158596 transitions. [2021-05-03 14:13:05,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:13:05,326 INFO L276 IsEmpty]: Start isEmpty. Operand 47191 states and 158596 transitions. [2021-05-03 14:13:05,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:05,340 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:05,340 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:05,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24731 [2021-05-03 14:13:05,561 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:05,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:05,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1789280959, now seen corresponding path program 314 times [2021-05-03 14:13:05,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:05,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980726113] [2021-05-03 14:13:05,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:05,668 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:05,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980726113] [2021-05-03 14:13:05,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516414982] [2021-05-03 14:13:05,668 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 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:05,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:13:05,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:05,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:05,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:05,767 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:05,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:05,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:13:05,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034121195] [2021-05-03 14:13:05,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:05,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:05,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:05,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:05,768 INFO L87 Difference]: Start difference. First operand 47191 states and 158596 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:13:06,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:06,178 INFO L93 Difference]: Finished difference Result 47742 states and 160042 transitions. [2021-05-03 14:13:06,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:13:06,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:13:06,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:06,323 INFO L225 Difference]: With dead ends: 47742 [2021-05-03 14:13:06,323 INFO L226 Difference]: Without dead ends: 47734 [2021-05-03 14:13:06,323 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=295, Invalid=635, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:13:06,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47734 states. [2021-05-03 14:13:07,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47734 to 47191. [2021-05-03 14:13:07,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47191 states, 47190 states have (on average 3.360775588048315) internal successors, (158595), 47190 states have internal predecessors, (158595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47191 states to 47191 states and 158595 transitions. [2021-05-03 14:13:07,773 INFO L78 Accepts]: Start accepts. Automaton has 47191 states and 158595 transitions. Word has length 22 [2021-05-03 14:13:07,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:07,799 INFO L480 AbstractCegarLoop]: Abstraction has 47191 states and 158595 transitions. [2021-05-03 14:13:07,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:13:07,799 INFO L276 IsEmpty]: Start isEmpty. Operand 47191 states and 158595 transitions. [2021-05-03 14:13:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:07,814 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:07,814 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:08,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24732 [2021-05-03 14:13:08,021 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:08,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1318637386, now seen corresponding path program 315 times [2021-05-03 14:13:08,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:08,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072997446] [2021-05-03 14:13:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:08,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072997446] [2021-05-03 14:13:08,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004779116] [2021-05-03 14:13:08,135 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 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:08,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:13:08,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:08,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:08,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:08,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:08,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:13:08,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031298152] [2021-05-03 14:13:08,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:08,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:08,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:08,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:08,233 INFO L87 Difference]: Start difference. First operand 47191 states and 158595 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:13:08,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:08,883 INFO L93 Difference]: Finished difference Result 47541 states and 159355 transitions. [2021-05-03 14:13:08,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-03 14:13:08,884 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:13:08,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:09,466 INFO L225 Difference]: With dead ends: 47541 [2021-05-03 14:13:09,466 INFO L226 Difference]: Without dead ends: 47541 [2021-05-03 14:13:09,467 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 436.8ms TimeCoverageRelationStatistics Valid=674, Invalid=1396, Unknown=0, NotChecked=0, Total=2070 [2021-05-03 14:13:09,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47541 states. [2021-05-03 14:13:10,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47541 to 47151. [2021-05-03 14:13:10,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47151 states, 47150 states have (on average 3.3610816542948037) internal successors, (158475), 47150 states have internal predecessors, (158475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:10,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47151 states to 47151 states and 158475 transitions. [2021-05-03 14:13:10,432 INFO L78 Accepts]: Start accepts. Automaton has 47151 states and 158475 transitions. Word has length 22 [2021-05-03 14:13:10,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:10,432 INFO L480 AbstractCegarLoop]: Abstraction has 47151 states and 158475 transitions. [2021-05-03 14:13:10,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:13:10,432 INFO L276 IsEmpty]: Start isEmpty. Operand 47151 states and 158475 transitions. [2021-05-03 14:13:10,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:10,447 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:10,447 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:10,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24733 [2021-05-03 14:13:10,669 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:10,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:10,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1520534531, now seen corresponding path program 316 times [2021-05-03 14:13:10,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:10,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256337487] [2021-05-03 14:13:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:10,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256337487] [2021-05-03 14:13:10,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605988717] [2021-05-03 14:13:10,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:10,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:13:10,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:10,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:10,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:10,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:10,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:13:10,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138278986] [2021-05-03 14:13:10,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:10,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:10,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:10,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:10,878 INFO L87 Difference]: Start difference. First operand 47151 states and 158475 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:13:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:11,648 INFO L93 Difference]: Finished difference Result 47675 states and 159855 transitions. [2021-05-03 14:13:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:13:11,649 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:13:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:11,750 INFO L225 Difference]: With dead ends: 47675 [2021-05-03 14:13:11,750 INFO L226 Difference]: Without dead ends: 47666 [2021-05-03 14:13:11,750 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 595.5ms TimeCoverageRelationStatistics Valid=296, Invalid=634, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:13:11,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47666 states. [2021-05-03 14:13:12,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47666 to 47151. [2021-05-03 14:13:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47151 states, 47150 states have (on average 3.3610604453870625) internal successors, (158474), 47150 states have internal predecessors, (158474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47151 states to 47151 states and 158474 transitions. [2021-05-03 14:13:13,154 INFO L78 Accepts]: Start accepts. Automaton has 47151 states and 158474 transitions. Word has length 22 [2021-05-03 14:13:13,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:13,154 INFO L480 AbstractCegarLoop]: Abstraction has 47151 states and 158474 transitions. [2021-05-03 14:13:13,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:13:13,154 INFO L276 IsEmpty]: Start isEmpty. Operand 47151 states and 158474 transitions. [2021-05-03 14:13:13,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:13,172 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:13,172 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:13,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24734,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:13,393 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:13,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:13,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1231965904, now seen corresponding path program 317 times [2021-05-03 14:13:13,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:13,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549097013] [2021-05-03 14:13:13,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:13,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:13,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549097013] [2021-05-03 14:13:13,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840655962] [2021-05-03 14:13:13,518 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 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:13:13,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:13:13,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:13,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:13,633 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 7 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:13,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:13,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:13:13,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027597135] [2021-05-03 14:13:13,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:13,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:13,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:13,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:13,634 INFO L87 Difference]: Start difference. First operand 47151 states and 158474 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:13:14,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:14,405 INFO L93 Difference]: Finished difference Result 47706 states and 159825 transitions. [2021-05-03 14:13:14,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-03 14:13:14,406 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:13:14,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:14,548 INFO L225 Difference]: With dead ends: 47706 [2021-05-03 14:13:14,548 INFO L226 Difference]: Without dead ends: 47706 [2021-05-03 14:13:14,549 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 527.0ms TimeCoverageRelationStatistics Valid=881, Invalid=1771, Unknown=0, NotChecked=0, Total=2652 [2021-05-03 14:13:14,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47706 states. [2021-05-03 14:13:15,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47706 to 47150. [2021-05-03 14:13:15,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47150 states, 47149 states have (on average 3.3610681032471525) internal successors, (158471), 47149 states have internal predecessors, (158471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:15,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47150 states to 47150 states and 158471 transitions. [2021-05-03 14:13:15,917 INFO L78 Accepts]: Start accepts. Automaton has 47150 states and 158471 transitions. Word has length 22 [2021-05-03 14:13:15,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:15,917 INFO L480 AbstractCegarLoop]: Abstraction has 47150 states and 158471 transitions. [2021-05-03 14:13:15,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:13:15,917 INFO L276 IsEmpty]: Start isEmpty. Operand 47150 states and 158471 transitions. [2021-05-03 14:13:15,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:15,931 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:15,931 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:16,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24735 [2021-05-03 14:13:16,153 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:16,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1779329855, now seen corresponding path program 318 times [2021-05-03 14:13:16,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:16,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143541217] [2021-05-03 14:13:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:16,272 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:16,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143541217] [2021-05-03 14:13:16,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700271904] [2021-05-03 14:13:16,273 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 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:13:16,299 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:13:16,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:16,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:16,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:16,371 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:16,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:16,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:13:16,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443516344] [2021-05-03 14:13:16,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:16,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:16,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:16,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:16,372 INFO L87 Difference]: Start difference. First operand 47150 states and 158471 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:13:16,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:16,793 INFO L93 Difference]: Finished difference Result 47635 states and 159774 transitions. [2021-05-03 14:13:16,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:13:16,794 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:13:16,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:16,913 INFO L225 Difference]: With dead ends: 47635 [2021-05-03 14:13:16,913 INFO L226 Difference]: Without dead ends: 47625 [2021-05-03 14:13:16,913 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 258.0ms TimeCoverageRelationStatistics Valid=299, Invalid=631, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:13:16,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47625 states. [2021-05-03 14:13:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47625 to 47150. [2021-05-03 14:13:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47150 states, 47149 states have (on average 3.361046893889584) internal successors, (158470), 47149 states have internal predecessors, (158470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:18,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47150 states to 47150 states and 158470 transitions. [2021-05-03 14:13:18,218 INFO L78 Accepts]: Start accepts. Automaton has 47150 states and 158470 transitions. Word has length 22 [2021-05-03 14:13:18,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:18,218 INFO L480 AbstractCegarLoop]: Abstraction has 47150 states and 158470 transitions. [2021-05-03 14:13:18,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:13:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 47150 states and 158470 transitions. [2021-05-03 14:13:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:18,232 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:18,233 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:18,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24736 [2021-05-03 14:13:18,453 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:18,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:18,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1303710730, now seen corresponding path program 319 times [2021-05-03 14:13:18,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:18,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424363293] [2021-05-03 14:13:18,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:18,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424363293] [2021-05-03 14:13:18,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566460260] [2021-05-03 14:13:18,577 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 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:18,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:18,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:18,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:18,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:18,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-03 14:13:18,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158591402] [2021-05-03 14:13:18,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:18,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:18,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:18,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:18,702 INFO L87 Difference]: Start difference. First operand 47150 states and 158470 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:13:19,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:19,433 INFO L93 Difference]: Finished difference Result 47789 states and 160069 transitions. [2021-05-03 14:13:19,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 14:13:19,434 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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 22 [2021-05-03 14:13:19,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:19,993 INFO L225 Difference]: With dead ends: 47789 [2021-05-03 14:13:19,993 INFO L226 Difference]: Without dead ends: 47789 [2021-05-03 14:13:19,994 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 509.5ms TimeCoverageRelationStatistics Valid=796, Invalid=1654, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 14:13:20,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47789 states. [2021-05-03 14:13:20,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47789 to 47151. [2021-05-03 14:13:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47151 states, 47150 states have (on average 3.3610392364793213) internal successors, (158473), 47150 states have internal predecessors, (158473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:20,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47151 states to 47151 states and 158473 transitions. [2021-05-03 14:13:20,955 INFO L78 Accepts]: Start accepts. Automaton has 47151 states and 158473 transitions. Word has length 22 [2021-05-03 14:13:20,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:20,956 INFO L480 AbstractCegarLoop]: Abstraction has 47151 states and 158473 transitions. [2021-05-03 14:13:20,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 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) [2021-05-03 14:13:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 47151 states and 158473 transitions. [2021-05-03 14:13:20,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:20,970 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:20,970 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:21,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24737,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:21,171 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:21,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:21,171 INFO L82 PathProgramCache]: Analyzing trace with hash 79134407, now seen corresponding path program 320 times [2021-05-03 14:13:21,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:21,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550753947] [2021-05-03 14:13:21,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:21,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550753947] [2021-05-03 14:13:21,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013272881] [2021-05-03 14:13:21,298 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 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:21,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:13:21,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:21,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:21,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:21,376 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:21,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:21,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-05-03 14:13:21,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638247484] [2021-05-03 14:13:21,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:13:21,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:21,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:13:21,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:13:21,377 INFO L87 Difference]: Start difference. First operand 47151 states and 158473 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:21,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:21,970 INFO L93 Difference]: Finished difference Result 47659 states and 159370 transitions. [2021-05-03 14:13:21,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:13:21,971 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:21,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:22,087 INFO L225 Difference]: With dead ends: 47659 [2021-05-03 14:13:22,087 INFO L226 Difference]: Without dead ends: 47659 [2021-05-03 14:13:22,087 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=121, Invalid=185, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:22,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47659 states. [2021-05-03 14:13:23,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47659 to 47163. [2021-05-03 14:13:23,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47163 states, 47162 states have (on average 3.361180611509266) internal successors, (158520), 47162 states have internal predecessors, (158520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:23,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47163 states to 47163 states and 158520 transitions. [2021-05-03 14:13:23,525 INFO L78 Accepts]: Start accepts. Automaton has 47163 states and 158520 transitions. Word has length 22 [2021-05-03 14:13:23,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:23,526 INFO L480 AbstractCegarLoop]: Abstraction has 47163 states and 158520 transitions. [2021-05-03 14:13:23,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:23,526 INFO L276 IsEmpty]: Start isEmpty. Operand 47163 states and 158520 transitions. [2021-05-03 14:13:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:23,541 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:23,541 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:23,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24738,322 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:23,764 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:23,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1162424540, now seen corresponding path program 321 times [2021-05-03 14:13:23,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:23,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936542850] [2021-05-03 14:13:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:23,889 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:23,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936542850] [2021-05-03 14:13:23,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588770985] [2021-05-03 14:13:23,889 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 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:23,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-03 14:13:23,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:23,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:23,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:23,977 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:23,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:23,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-05-03 14:13:23,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043430049] [2021-05-03 14:13:23,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:13:23,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:23,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:13:23,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:13:23,978 INFO L87 Difference]: Start difference. First operand 47163 states and 158520 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:24,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:24,488 INFO L93 Difference]: Finished difference Result 52455 states and 175524 transitions. [2021-05-03 14:13:24,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:13:24,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:24,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:24,657 INFO L225 Difference]: With dead ends: 52455 [2021-05-03 14:13:24,657 INFO L226 Difference]: Without dead ends: 52453 [2021-05-03 14:13:24,657 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=286, Invalid=526, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:13:24,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52453 states. [2021-05-03 14:13:25,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52453 to 52239. [2021-05-03 14:13:25,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52239 states, 52238 states have (on average 3.355009763007772) internal successors, (175259), 52238 states have internal predecessors, (175259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52239 states to 52239 states and 175259 transitions. [2021-05-03 14:13:26,177 INFO L78 Accepts]: Start accepts. Automaton has 52239 states and 175259 transitions. Word has length 22 [2021-05-03 14:13:26,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:26,178 INFO L480 AbstractCegarLoop]: Abstraction has 52239 states and 175259 transitions. [2021-05-03 14:13:26,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:26,178 INFO L276 IsEmpty]: Start isEmpty. Operand 52239 states and 175259 transitions. [2021-05-03 14:13:26,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:26,192 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:26,193 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:26,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24739,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:26,414 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:26,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:26,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1819226717, now seen corresponding path program 322 times [2021-05-03 14:13:26,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:26,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480410562] [2021-05-03 14:13:26,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:26,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:26,533 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:26,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480410562] [2021-05-03 14:13:26,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877899611] [2021-05-03 14:13:26,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:13:26,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:13:26,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:26,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:26,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:26,617 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 57 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:13:26,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:26,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-05-03 14:13:26,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700123610] [2021-05-03 14:13:26,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:13:26,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:26,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:13:26,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:13:26,618 INFO L87 Difference]: Start difference. First operand 52239 states and 175259 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:27,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:27,128 INFO L93 Difference]: Finished difference Result 52643 states and 175881 transitions. [2021-05-03 14:13:27,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:13:27,129 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:27,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:27,297 INFO L225 Difference]: With dead ends: 52643 [2021-05-03 14:13:27,297 INFO L226 Difference]: Without dead ends: 52642 [2021-05-03 14:13:27,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:13:27,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52642 states. [2021-05-03 14:13:28,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52642 to 52239. [2021-05-03 14:13:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52239 states, 52238 states have (on average 3.3549906198552777) internal successors, (175258), 52238 states have internal predecessors, (175258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52239 states to 52239 states and 175258 transitions. [2021-05-03 14:13:28,989 INFO L78 Accepts]: Start accepts. Automaton has 52239 states and 175258 transitions. Word has length 22 [2021-05-03 14:13:28,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:28,989 INFO L480 AbstractCegarLoop]: Abstraction has 52239 states and 175258 transitions. [2021-05-03 14:13:28,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:28,989 INFO L276 IsEmpty]: Start isEmpty. Operand 52239 states and 175258 transitions. [2021-05-03 14:13:29,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:29,005 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:29,005 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:29,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24740 [2021-05-03 14:13:29,227 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:29,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:29,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1553321846, now seen corresponding path program 323 times [2021-05-03 14:13:29,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:29,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132276460] [2021-05-03 14:13:29,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:29,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132276460] [2021-05-03 14:13:29,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014327898] [2021-05-03 14:13:29,344 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 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:29,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-03 14:13:29,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:29,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:29,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:13:29,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:29,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-05-03 14:13:29,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273733162] [2021-05-03 14:13:29,433 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-03 14:13:29,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:29,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-03 14:13:29,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:13:29,434 INFO L87 Difference]: Start difference. First operand 52239 states and 175258 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:30,249 INFO L93 Difference]: Finished difference Result 52789 states and 176524 transitions. [2021-05-03 14:13:30,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:13:30,251 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:30,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:30,432 INFO L225 Difference]: With dead ends: 52789 [2021-05-03 14:13:30,432 INFO L226 Difference]: Without dead ends: 52789 [2021-05-03 14:13:30,432 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 221.7ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:13:30,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52789 states. [2021-05-03 14:13:31,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52789 to 52241. [2021-05-03 14:13:31,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52241 states, 52240 states have (on average 3.354977029096478) internal successors, (175264), 52240 states have internal predecessors, (175264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:32,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52241 states to 52241 states and 175264 transitions. [2021-05-03 14:13:32,040 INFO L78 Accepts]: Start accepts. Automaton has 52241 states and 175264 transitions. Word has length 22 [2021-05-03 14:13:32,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:32,040 INFO L480 AbstractCegarLoop]: Abstraction has 52241 states and 175264 transitions. [2021-05-03 14:13:32,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:32,040 INFO L276 IsEmpty]: Start isEmpty. Operand 52241 states and 175264 transitions. [2021-05-03 14:13:32,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:32,052 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:32,052 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:32,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24741 [2021-05-03 14:13:32,252 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:32,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:32,253 INFO L82 PathProgramCache]: Analyzing trace with hash -765127271, now seen corresponding path program 324 times [2021-05-03 14:13:32,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:32,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885718524] [2021-05-03 14:13:32,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:32,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885718524] [2021-05-03 14:13:32,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243404888] [2021-05-03 14:13:32,339 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 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:32,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:13:32,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:32,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:32,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 49 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:32,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:32,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-05-03 14:13:32,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719900879] [2021-05-03 14:13:32,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:32,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:32,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:32,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:32,418 INFO L87 Difference]: Start difference. First operand 52241 states and 175264 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:32,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:32,842 INFO L93 Difference]: Finished difference Result 52650 states and 175893 transitions. [2021-05-03 14:13:32,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-03 14:13:32,843 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:32,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:32,957 INFO L225 Difference]: With dead ends: 52650 [2021-05-03 14:13:32,958 INFO L226 Difference]: Without dead ends: 52648 [2021-05-03 14:13:32,958 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:13:32,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52648 states. [2021-05-03 14:13:34,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52648 to 52241. [2021-05-03 14:13:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52241 states, 52240 states have (on average 3.354957886676876) internal successors, (175263), 52240 states have internal predecessors, (175263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:34,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52241 states to 52241 states and 175263 transitions. [2021-05-03 14:13:34,291 INFO L78 Accepts]: Start accepts. Automaton has 52241 states and 175263 transitions. Word has length 22 [2021-05-03 14:13:34,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:34,291 INFO L480 AbstractCegarLoop]: Abstraction has 52241 states and 175263 transitions. [2021-05-03 14:13:34,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:34,292 INFO L276 IsEmpty]: Start isEmpty. Operand 52241 states and 175263 transitions. [2021-05-03 14:13:34,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:34,303 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:34,303 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:34,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24742 [2021-05-03 14:13:34,504 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:34,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:34,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1012598116, now seen corresponding path program 325 times [2021-05-03 14:13:34,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:34,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735612521] [2021-05-03 14:13:34,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:34,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735612521] [2021-05-03 14:13:34,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838627515] [2021-05-03 14:13:34,602 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 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:34,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:34,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:34,688 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:34,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:34,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-05-03 14:13:34,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839793628] [2021-05-03 14:13:34,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:34,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:34,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:34,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:34,688 INFO L87 Difference]: Start difference. First operand 52241 states and 175263 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:35,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:35,110 INFO L93 Difference]: Finished difference Result 53145 states and 177547 transitions. [2021-05-03 14:13:35,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:13:35,111 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:35,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:35,227 INFO L225 Difference]: With dead ends: 53145 [2021-05-03 14:13:35,227 INFO L226 Difference]: Without dead ends: 53145 [2021-05-03 14:13:35,227 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=378, Invalid=744, Unknown=0, NotChecked=0, Total=1122 [2021-05-03 14:13:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53145 states. [2021-05-03 14:13:36,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53145 to 52267. [2021-05-03 14:13:36,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52267 states, 52266 states have (on average 3.3547813109861093) internal successors, (175341), 52266 states have internal predecessors, (175341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:36,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52267 states to 52267 states and 175341 transitions. [2021-05-03 14:13:36,514 INFO L78 Accepts]: Start accepts. Automaton has 52267 states and 175341 transitions. Word has length 22 [2021-05-03 14:13:36,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:36,514 INFO L480 AbstractCegarLoop]: Abstraction has 52267 states and 175341 transitions. [2021-05-03 14:13:36,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:36,514 INFO L276 IsEmpty]: Start isEmpty. Operand 52267 states and 175341 transitions. [2021-05-03 14:13:36,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:36,525 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:36,525 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:36,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24743 [2021-05-03 14:13:36,726 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:36,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:36,726 INFO L82 PathProgramCache]: Analyzing trace with hash 724277725, now seen corresponding path program 326 times [2021-05-03 14:13:36,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:36,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33936497] [2021-05-03 14:13:36,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:36,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:36,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33936497] [2021-05-03 14:13:36,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425228309] [2021-05-03 14:13:36,814 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 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:36,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:13:36,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:36,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:36,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:36,896 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 43 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:36,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:36,896 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-05-03 14:13:36,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571854867] [2021-05-03 14:13:36,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:36,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:36,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:36,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:36,897 INFO L87 Difference]: Start difference. First operand 52267 states and 175341 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:37,730 INFO L93 Difference]: Finished difference Result 62002 states and 207763 transitions. [2021-05-03 14:13:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:13:37,731 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:37,880 INFO L225 Difference]: With dead ends: 62002 [2021-05-03 14:13:37,880 INFO L226 Difference]: Without dead ends: 61999 [2021-05-03 14:13:37,881 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 194.1ms TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:13:37,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61999 states. [2021-05-03 14:13:39,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61999 to 52738. [2021-05-03 14:13:39,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52738 states, 52737 states have (on average 3.3552913514230993) internal successors, (176948), 52737 states have internal predecessors, (176948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:39,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52738 states to 52738 states and 176948 transitions. [2021-05-03 14:13:39,266 INFO L78 Accepts]: Start accepts. Automaton has 52738 states and 176948 transitions. Word has length 22 [2021-05-03 14:13:39,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:39,266 INFO L480 AbstractCegarLoop]: Abstraction has 52738 states and 176948 transitions. [2021-05-03 14:13:39,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:39,266 INFO L276 IsEmpty]: Start isEmpty. Operand 52738 states and 176948 transitions. [2021-05-03 14:13:39,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:39,278 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:39,278 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:39,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24744,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:39,479 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:39,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:39,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1048261686, now seen corresponding path program 327 times [2021-05-03 14:13:39,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:39,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101476908] [2021-05-03 14:13:39,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:39,595 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:39,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101476908] [2021-05-03 14:13:39,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344749976] [2021-05-03 14:13:39,595 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 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:39,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:13:39,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:39,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:39,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:39,702 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:39,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:39,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-05-03 14:13:39,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706256887] [2021-05-03 14:13:39,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:39,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:39,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:39,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:39,703 INFO L87 Difference]: Start difference. First operand 52738 states and 176948 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:40,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:40,274 INFO L93 Difference]: Finished difference Result 57485 states and 191902 transitions. [2021-05-03 14:13:40,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 14:13:40,275 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:40,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:40,439 INFO L225 Difference]: With dead ends: 57485 [2021-05-03 14:13:40,440 INFO L226 Difference]: Without dead ends: 57485 [2021-05-03 14:13:40,440 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 333.0ms TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:13:40,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57485 states. [2021-05-03 14:13:41,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57485 to 55682. [2021-05-03 14:13:41,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55682 states, 55681 states have (on average 3.3543219410570932) internal successors, (186772), 55681 states have internal predecessors, (186772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:42,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55682 states to 55682 states and 186772 transitions. [2021-05-03 14:13:42,059 INFO L78 Accepts]: Start accepts. Automaton has 55682 states and 186772 transitions. Word has length 22 [2021-05-03 14:13:42,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:42,059 INFO L480 AbstractCegarLoop]: Abstraction has 55682 states and 186772 transitions. [2021-05-03 14:13:42,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:42,060 INFO L276 IsEmpty]: Start isEmpty. Operand 55682 states and 186772 transitions. [2021-05-03 14:13:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:42,076 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:42,076 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:42,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24745 [2021-05-03 14:13:42,289 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:42,289 INFO L82 PathProgramCache]: Analyzing trace with hash -348807655, now seen corresponding path program 328 times [2021-05-03 14:13:42,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:42,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805768300] [2021-05-03 14:13:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:42,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805768300] [2021-05-03 14:13:42,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917467222] [2021-05-03 14:13:42,402 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 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:13:42,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:13:42,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:42,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:42,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 39 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:42,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:42,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-05-03 14:13:42,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504139774] [2021-05-03 14:13:42,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:42,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:42,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:42,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:42,495 INFO L87 Difference]: Start difference. First operand 55682 states and 186772 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:43,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:43,545 INFO L93 Difference]: Finished difference Result 62863 states and 210498 transitions. [2021-05-03 14:13:43,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:13:43,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:43,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:43,777 INFO L225 Difference]: With dead ends: 62863 [2021-05-03 14:13:43,777 INFO L226 Difference]: Without dead ends: 62859 [2021-05-03 14:13:43,778 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=274, Invalid=596, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:13:43,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62859 states. [2021-05-03 14:13:45,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62859 to 55742. [2021-05-03 14:13:45,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55742 states, 55741 states have (on average 3.3543531691214725) internal successors, (186975), 55741 states have internal predecessors, (186975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:45,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55742 states to 55742 states and 186975 transitions. [2021-05-03 14:13:45,533 INFO L78 Accepts]: Start accepts. Automaton has 55742 states and 186975 transitions. Word has length 22 [2021-05-03 14:13:45,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:45,533 INFO L480 AbstractCegarLoop]: Abstraction has 55742 states and 186975 transitions. [2021-05-03 14:13:45,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:45,534 INFO L276 IsEmpty]: Start isEmpty. Operand 55742 states and 186975 transitions. [2021-05-03 14:13:45,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:45,548 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:45,548 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:45,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24746 [2021-05-03 14:13:45,771 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:45,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:45,771 INFO L82 PathProgramCache]: Analyzing trace with hash -510406108, now seen corresponding path program 329 times [2021-05-03 14:13:45,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:45,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611275090] [2021-05-03 14:13:45,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:45,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611275090] [2021-05-03 14:13:45,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253972811] [2021-05-03 14:13:45,885 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 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:45,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:13:45,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:45,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:45,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:45,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:45,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-05-03 14:13:45,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174030834] [2021-05-03 14:13:45,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:45,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:45,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:45,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:45,995 INFO L87 Difference]: Start difference. First operand 55742 states and 186975 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:46,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:46,654 INFO L93 Difference]: Finished difference Result 59840 states and 199447 transitions. [2021-05-03 14:13:46,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:13:46,655 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:46,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:46,848 INFO L225 Difference]: With dead ends: 59840 [2021-05-03 14:13:46,849 INFO L226 Difference]: Without dead ends: 59840 [2021-05-03 14:13:46,849 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 350.8ms TimeCoverageRelationStatistics Valid=441, Invalid=965, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:13:46,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59840 states. [2021-05-03 14:13:48,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59840 to 57734. [2021-05-03 14:13:48,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57734 states, 57733 states have (on average 3.3485528207437687) internal successors, (193322), 57733 states have internal predecessors, (193322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57734 states to 57734 states and 193322 transitions. [2021-05-03 14:13:48,590 INFO L78 Accepts]: Start accepts. Automaton has 57734 states and 193322 transitions. Word has length 22 [2021-05-03 14:13:48,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:48,590 INFO L480 AbstractCegarLoop]: Abstraction has 57734 states and 193322 transitions. [2021-05-03 14:13:48,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:48,590 INFO L276 IsEmpty]: Start isEmpty. Operand 57734 states and 193322 transitions. [2021-05-03 14:13:48,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:48,606 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:48,606 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:48,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24747 [2021-05-03 14:13:48,828 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:48,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:48,828 INFO L82 PathProgramCache]: Analyzing trace with hash 745283933, now seen corresponding path program 330 times [2021-05-03 14:13:48,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:48,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718991413] [2021-05-03 14:13:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 31 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:48,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718991413] [2021-05-03 14:13:48,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544551645] [2021-05-03 14:13:48,933 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 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:13:48,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:13:48,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:48,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:48,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 37 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:49,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:49,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-05-03 14:13:49,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535159727] [2021-05-03 14:13:49,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:49,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:49,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:49,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:49,033 INFO L87 Difference]: Start difference. First operand 57734 states and 193322 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:50,172 INFO L93 Difference]: Finished difference Result 62862 states and 210023 transitions. [2021-05-03 14:13:50,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:13:50,172 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:50,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:50,332 INFO L225 Difference]: With dead ends: 62862 [2021-05-03 14:13:50,332 INFO L226 Difference]: Without dead ends: 62857 [2021-05-03 14:13:50,332 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 657.0ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:13:50,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62857 states. [2021-05-03 14:13:51,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62857 to 57784. [2021-05-03 14:13:51,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57784 states, 57783 states have (on average 3.3484761954207984) internal successors, (193485), 57783 states have internal predecessors, (193485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:52,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57784 states to 57784 states and 193485 transitions. [2021-05-03 14:13:52,062 INFO L78 Accepts]: Start accepts. Automaton has 57784 states and 193485 transitions. Word has length 22 [2021-05-03 14:13:52,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:52,062 INFO L480 AbstractCegarLoop]: Abstraction has 57784 states and 193485 transitions. [2021-05-03 14:13:52,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:52,063 INFO L276 IsEmpty]: Start isEmpty. Operand 57784 states and 193485 transitions. [2021-05-03 14:13:52,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:52,078 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:52,078 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:52,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24748,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:52,292 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:52,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:52,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1016752374, now seen corresponding path program 331 times [2021-05-03 14:13:52,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:52,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282947238] [2021-05-03 14:13:52,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:52,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282947238] [2021-05-03 14:13:52,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952948418] [2021-05-03 14:13:52,462 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 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:52,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:52,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:52,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:52,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-05-03 14:13:52,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590625466] [2021-05-03 14:13:52,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:52,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:52,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:52,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:52,575 INFO L87 Difference]: Start difference. First operand 57784 states and 193485 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:53,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:53,203 INFO L93 Difference]: Finished difference Result 59245 states and 197645 transitions. [2021-05-03 14:13:53,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:13:53,204 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:53,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:53,394 INFO L225 Difference]: With dead ends: 59245 [2021-05-03 14:13:53,394 INFO L226 Difference]: Without dead ends: 59245 [2021-05-03 14:13:53,394 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 379.2ms TimeCoverageRelationStatistics Valid=379, Invalid=881, Unknown=0, NotChecked=0, Total=1260 [2021-05-03 14:13:53,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59245 states. [2021-05-03 14:13:54,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59245 to 58805. [2021-05-03 14:13:54,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58805 states, 58804 states have (on average 3.343939187810353) internal successors, (196637), 58804 states have internal predecessors, (196637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58805 states to 58805 states and 196637 transitions. [2021-05-03 14:13:55,109 INFO L78 Accepts]: Start accepts. Automaton has 58805 states and 196637 transitions. Word has length 22 [2021-05-03 14:13:55,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:55,109 INFO L480 AbstractCegarLoop]: Abstraction has 58805 states and 196637 transitions. [2021-05-03 14:13:55,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:55,109 INFO L276 IsEmpty]: Start isEmpty. Operand 58805 states and 196637 transitions. [2021-05-03 14:13:55,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:55,123 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:55,123 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:55,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24749 [2021-05-03 14:13:55,337 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:55,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:55,337 INFO L82 PathProgramCache]: Analyzing trace with hash 302384793, now seen corresponding path program 332 times [2021-05-03 14:13:55,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:55,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734825036] [2021-05-03 14:13:55,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:55,447 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:55,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734825036] [2021-05-03 14:13:55,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255830095] [2021-05-03 14:13:55,447 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 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:55,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:13:55,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:55,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:55,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:13:55,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:55,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-05-03 14:13:55,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546632926] [2021-05-03 14:13:55,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:55,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:55,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:55,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:55,883 INFO L87 Difference]: Start difference. First operand 58805 states and 196637 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:56,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:56,437 INFO L93 Difference]: Finished difference Result 61679 states and 205433 transitions. [2021-05-03 14:13:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:13:56,438 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:56,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:56,634 INFO L225 Difference]: With dead ends: 61679 [2021-05-03 14:13:56,634 INFO L226 Difference]: Without dead ends: 61673 [2021-05-03 14:13:56,634 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 215.6ms TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:13:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61673 states. [2021-05-03 14:13:58,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61673 to 58817. [2021-05-03 14:13:58,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58817 states, 58816 states have (on average 3.3438520130576714) internal successors, (196672), 58816 states have internal predecessors, (196672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:58,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58817 states to 58817 states and 196672 transitions. [2021-05-03 14:13:58,312 INFO L78 Accepts]: Start accepts. Automaton has 58817 states and 196672 transitions. Word has length 22 [2021-05-03 14:13:58,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:13:58,312 INFO L480 AbstractCegarLoop]: Abstraction has 58817 states and 196672 transitions. [2021-05-03 14:13:58,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:58,312 INFO L276 IsEmpty]: Start isEmpty. Operand 58817 states and 196672 transitions. [2021-05-03 14:13:58,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:13:58,327 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:13:58,327 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:13:58,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24750,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:58,542 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:13:58,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:13:58,542 INFO L82 PathProgramCache]: Analyzing trace with hash 466382564, now seen corresponding path program 333 times [2021-05-03 14:13:58,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:13:58,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301201420] [2021-05-03 14:13:58,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:13:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:13:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:13:58,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301201420] [2021-05-03 14:13:58,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886209305] [2021-05-03 14:13:58,657 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 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:13:58,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:13:58,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:13:58,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:13:58,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:13:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:13:58,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:13:58,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-05-03 14:13:58,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068276355] [2021-05-03 14:13:58,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-03 14:13:58,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:13:58,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-03 14:13:58,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:13:58,765 INFO L87 Difference]: Start difference. First operand 58817 states and 196672 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:13:59,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:13:59,371 INFO L93 Difference]: Finished difference Result 59172 states and 197554 transitions. [2021-05-03 14:13:59,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:13:59,372 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:13:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:13:59,557 INFO L225 Difference]: With dead ends: 59172 [2021-05-03 14:13:59,557 INFO L226 Difference]: Without dead ends: 59172 [2021-05-03 14:13:59,557 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 335.3ms TimeCoverageRelationStatistics Valid=402, Invalid=930, Unknown=0, NotChecked=0, Total=1332 [2021-05-03 14:13:59,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59172 states. [2021-05-03 14:14:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59172 to 58982. [2021-05-03 14:14:00,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58982 states, 58981 states have (on average 3.342923992472152) internal successors, (197169), 58981 states have internal predecessors, (197169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58982 states to 58982 states and 197169 transitions. [2021-05-03 14:14:01,501 INFO L78 Accepts]: Start accepts. Automaton has 58982 states and 197169 transitions. Word has length 22 [2021-05-03 14:14:01,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:01,501 INFO L480 AbstractCegarLoop]: Abstraction has 58982 states and 197169 transitions. [2021-05-03 14:14:01,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 58982 states and 197169 transitions. [2021-05-03 14:14:01,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:01,529 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:01,529 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:01,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24751 [2021-05-03 14:14:01,749 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:01,749 INFO L82 PathProgramCache]: Analyzing trace with hash -542586659, now seen corresponding path program 334 times [2021-05-03 14:14:01,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:01,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644662554] [2021-05-03 14:14:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:01,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644662554] [2021-05-03 14:14:01,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882741311] [2021-05-03 14:14:01,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:01,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:14:01,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:01,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:01,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 38 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:01,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:01,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-05-03 14:14:01,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695849992] [2021-05-03 14:14:01,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:14:01,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:01,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:14:01,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:14:01,969 INFO L87 Difference]: Start difference. First operand 58982 states and 197169 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:02,447 INFO L93 Difference]: Finished difference Result 61898 states and 206013 transitions. [2021-05-03 14:14:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:14:02,448 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:02,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:02,597 INFO L225 Difference]: With dead ends: 61898 [2021-05-03 14:14:02,597 INFO L226 Difference]: Without dead ends: 61891 [2021-05-03 14:14:02,597 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=302, Invalid=690, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:14:02,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61891 states. [2021-05-03 14:14:03,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61891 to 59091. [2021-05-03 14:14:04,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59091 states, 59090 states have (on average 3.3429514300220005) internal successors, (197535), 59090 states have internal predecessors, (197535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59091 states to 59091 states and 197535 transitions. [2021-05-03 14:14:04,202 INFO L78 Accepts]: Start accepts. Automaton has 59091 states and 197535 transitions. Word has length 22 [2021-05-03 14:14:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:04,202 INFO L480 AbstractCegarLoop]: Abstraction has 59091 states and 197535 transitions. [2021-05-03 14:14:04,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:04,203 INFO L276 IsEmpty]: Start isEmpty. Operand 59091 states and 197535 transitions. [2021-05-03 14:14:04,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:04,217 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:04,217 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:04,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24752,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:04,433 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:04,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:04,433 INFO L82 PathProgramCache]: Analyzing trace with hash -801074614, now seen corresponding path program 335 times [2021-05-03 14:14:04,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:04,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029164797] [2021-05-03 14:14:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:04,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029164797] [2021-05-03 14:14:04,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257456159] [2021-05-03 14:14:04,554 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 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:14:04,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:14:04,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:04,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:04,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:04,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:04,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-05-03 14:14:04,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242333250] [2021-05-03 14:14:04,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:14:04,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:04,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:14:04,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:14:04,675 INFO L87 Difference]: Start difference. First operand 59091 states and 197535 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:05,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:05,365 INFO L93 Difference]: Finished difference Result 59327 states and 198014 transitions. [2021-05-03 14:14:05,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:14:05,366 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:05,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:05,887 INFO L225 Difference]: With dead ends: 59327 [2021-05-03 14:14:05,887 INFO L226 Difference]: Without dead ends: 59327 [2021-05-03 14:14:05,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 431.5ms TimeCoverageRelationStatistics Valid=571, Invalid=1235, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:14:05,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59327 states. [2021-05-03 14:14:06,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59327 to 59074. [2021-05-03 14:14:06,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59074 states, 59073 states have (on average 3.3430501244223247) internal successors, (197484), 59073 states have internal predecessors, (197484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:07,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59074 states to 59074 states and 197484 transitions. [2021-05-03 14:14:07,455 INFO L78 Accepts]: Start accepts. Automaton has 59074 states and 197484 transitions. Word has length 22 [2021-05-03 14:14:07,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:07,455 INFO L480 AbstractCegarLoop]: Abstraction has 59074 states and 197484 transitions. [2021-05-03 14:14:07,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:07,455 INFO L276 IsEmpty]: Start isEmpty. Operand 59074 states and 197484 transitions. [2021-05-03 14:14:07,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:07,467 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:07,467 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:07,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24753 [2021-05-03 14:14:07,668 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:07,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:07,668 INFO L82 PathProgramCache]: Analyzing trace with hash -966897895, now seen corresponding path program 336 times [2021-05-03 14:14:07,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:07,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882955780] [2021-05-03 14:14:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:07,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:07,778 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 40 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:07,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882955780] [2021-05-03 14:14:07,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942430816] [2021-05-03 14:14:07,778 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 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:14:07,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:14:07,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:07,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:07,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:07,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:07,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-05-03 14:14:07,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152055196] [2021-05-03 14:14:07,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:14:07,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:07,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:14:07,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:14:07,893 INFO L87 Difference]: Start difference. First operand 59074 states and 197484 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:08,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:08,435 INFO L93 Difference]: Finished difference Result 59702 states and 199136 transitions. [2021-05-03 14:14:08,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:14:08,436 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:08,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:08,640 INFO L225 Difference]: With dead ends: 59702 [2021-05-03 14:14:08,641 INFO L226 Difference]: Without dead ends: 59694 [2021-05-03 14:14:08,641 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 278.6ms TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:14:08,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59694 states. [2021-05-03 14:14:10,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59694 to 59074. [2021-05-03 14:14:10,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59074 states, 59073 states have (on average 3.343033196214853) internal successors, (197483), 59073 states have internal predecessors, (197483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:10,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59074 states to 59074 states and 197483 transitions. [2021-05-03 14:14:10,361 INFO L78 Accepts]: Start accepts. Automaton has 59074 states and 197483 transitions. Word has length 22 [2021-05-03 14:14:10,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:10,361 INFO L480 AbstractCegarLoop]: Abstraction has 59074 states and 197483 transitions. [2021-05-03 14:14:10,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:10,361 INFO L276 IsEmpty]: Start isEmpty. Operand 59074 states and 197483 transitions. [2021-05-03 14:14:10,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:10,376 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:10,376 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:10,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24754 [2021-05-03 14:14:10,597 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:10,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:10,598 INFO L82 PathProgramCache]: Analyzing trace with hash -1437541468, now seen corresponding path program 337 times [2021-05-03 14:14:10,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:10,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025409898] [2021-05-03 14:14:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:10,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025409898] [2021-05-03 14:14:10,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579743232] [2021-05-03 14:14:10,730 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 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:14:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:10,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:10,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:10,843 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:10,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:10,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-05-03 14:14:10,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681377267] [2021-05-03 14:14:10,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:14:10,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:10,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:14:10,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:14:10,844 INFO L87 Difference]: Start difference. First operand 59074 states and 197483 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:11,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:11,899 INFO L93 Difference]: Finished difference Result 59388 states and 198191 transitions. [2021-05-03 14:14:11,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:14:11,900 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:11,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:12,111 INFO L225 Difference]: With dead ends: 59388 [2021-05-03 14:14:12,112 INFO L226 Difference]: Without dead ends: 59388 [2021-05-03 14:14:12,112 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 456.6ms TimeCoverageRelationStatistics Valid=510, Invalid=1130, Unknown=0, NotChecked=0, Total=1640 [2021-05-03 14:14:12,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59388 states. [2021-05-03 14:14:13,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59388 to 59083. [2021-05-03 14:14:13,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59083 states, 59082 states have (on average 3.3429809417419856) internal successors, (197510), 59082 states have internal predecessors, (197510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:13,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59083 states to 59083 states and 197510 transitions. [2021-05-03 14:14:13,624 INFO L78 Accepts]: Start accepts. Automaton has 59083 states and 197510 transitions. Word has length 22 [2021-05-03 14:14:13,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:13,624 INFO L480 AbstractCegarLoop]: Abstraction has 59083 states and 197510 transitions. [2021-05-03 14:14:13,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 59083 states and 197510 transitions. [2021-05-03 14:14:13,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:13,637 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:13,637 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:13,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24755 [2021-05-03 14:14:13,837 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:13,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:13,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1235644323, now seen corresponding path program 338 times [2021-05-03 14:14:13,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:13,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469262412] [2021-05-03 14:14:13,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:13,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 47 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:13,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469262412] [2021-05-03 14:14:13,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791051092] [2021-05-03 14:14:13,941 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 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:13,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:14:13,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:13,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:13,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:14,034 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:14,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:14,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-05-03 14:14:14,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032404167] [2021-05-03 14:14:14,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:14:14,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:14,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:14:14,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:14:14,035 INFO L87 Difference]: Start difference. First operand 59083 states and 197510 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:14,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:14,472 INFO L93 Difference]: Finished difference Result 59681 states and 199088 transitions. [2021-05-03 14:14:14,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:14:14,473 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:14,615 INFO L225 Difference]: With dead ends: 59681 [2021-05-03 14:14:14,615 INFO L226 Difference]: Without dead ends: 59672 [2021-05-03 14:14:14,615 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 235.2ms TimeCoverageRelationStatistics Valid=302, Invalid=690, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:14:14,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59672 states. [2021-05-03 14:14:15,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59672 to 59083. [2021-05-03 14:14:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59083 states, 59082 states have (on average 3.3429640161131986) internal successors, (197509), 59082 states have internal predecessors, (197509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:16,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59083 states to 59083 states and 197509 transitions. [2021-05-03 14:14:16,032 INFO L78 Accepts]: Start accepts. Automaton has 59083 states and 197509 transitions. Word has length 22 [2021-05-03 14:14:16,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:16,032 INFO L480 AbstractCegarLoop]: Abstraction has 59083 states and 197509 transitions. [2021-05-03 14:14:16,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:16,032 INFO L276 IsEmpty]: Start isEmpty. Operand 59083 states and 197509 transitions. [2021-05-03 14:14:16,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:16,045 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:16,045 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:16,245 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24756 [2021-05-03 14:14:16,245 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:16,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:16,245 INFO L82 PathProgramCache]: Analyzing trace with hash 306822538, now seen corresponding path program 339 times [2021-05-03 14:14:16,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:16,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059193415] [2021-05-03 14:14:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:16,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059193415] [2021-05-03 14:14:16,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064989263] [2021-05-03 14:14:16,348 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 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:16,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:14:16,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:16,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:16,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:16,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:16,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-05-03 14:14:16,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591367910] [2021-05-03 14:14:16,446 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:14:16,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:16,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:14:16,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:14:16,446 INFO L87 Difference]: Start difference. First operand 59083 states and 197509 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:17,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:17,435 INFO L93 Difference]: Finished difference Result 59594 states and 198774 transitions. [2021-05-03 14:14:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 14:14:17,436 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:17,624 INFO L225 Difference]: With dead ends: 59594 [2021-05-03 14:14:17,625 INFO L226 Difference]: Without dead ends: 59594 [2021-05-03 14:14:17,625 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 380.0ms TimeCoverageRelationStatistics Valid=624, Invalid=1356, Unknown=0, NotChecked=0, Total=1980 [2021-05-03 14:14:17,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59594 states. [2021-05-03 14:14:18,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59594 to 59098. [2021-05-03 14:14:18,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59098 states, 59097 states have (on average 3.3428769649897627) internal successors, (197554), 59097 states have internal predecessors, (197554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:19,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59098 states to 59098 states and 197554 transitions. [2021-05-03 14:14:19,080 INFO L78 Accepts]: Start accepts. Automaton has 59098 states and 197554 transitions. Word has length 22 [2021-05-03 14:14:19,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:19,080 INFO L480 AbstractCegarLoop]: Abstraction has 59098 states and 197554 transitions. [2021-05-03 14:14:19,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:19,080 INFO L276 IsEmpty]: Start isEmpty. Operand 59098 states and 197554 transitions. [2021-05-03 14:14:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:19,096 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:19,096 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:19,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24757 [2021-05-03 14:14:19,313 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:19,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:19,313 INFO L82 PathProgramCache]: Analyzing trace with hash -976848999, now seen corresponding path program 340 times [2021-05-03 14:14:19,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:19,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399896737] [2021-05-03 14:14:19,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:19,441 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:19,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399896737] [2021-05-03 14:14:19,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44917052] [2021-05-03 14:14:19,441 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 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:19,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:14:19,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:19,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:19,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:19,537 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:19,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:19,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-05-03 14:14:19,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27118329] [2021-05-03 14:14:19,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:14:19,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:19,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:14:19,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:14:19,538 INFO L87 Difference]: Start difference. First operand 59098 states and 197554 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:19,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:19,939 INFO L93 Difference]: Finished difference Result 59666 states and 199057 transitions. [2021-05-03 14:14:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:14:19,940 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:19,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:20,072 INFO L225 Difference]: With dead ends: 59666 [2021-05-03 14:14:20,072 INFO L226 Difference]: Without dead ends: 59656 [2021-05-03 14:14:20,073 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:14:20,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59656 states. [2021-05-03 14:14:21,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59656 to 59098. [2021-05-03 14:14:21,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59098 states, 59097 states have (on average 3.3428600436570384) internal successors, (197553), 59097 states have internal predecessors, (197553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:21,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59098 states to 59098 states and 197553 transitions. [2021-05-03 14:14:21,586 INFO L78 Accepts]: Start accepts. Automaton has 59098 states and 197553 transitions. Word has length 22 [2021-05-03 14:14:21,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:21,586 INFO L480 AbstractCegarLoop]: Abstraction has 59098 states and 197553 transitions. [2021-05-03 14:14:21,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:21,586 INFO L276 IsEmpty]: Start isEmpty. Operand 59098 states and 197553 transitions. [2021-05-03 14:14:21,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:21,598 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:21,599 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:21,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24758,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:21,799 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:21,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:21,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1452468124, now seen corresponding path program 341 times [2021-05-03 14:14:21,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:21,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245301063] [2021-05-03 14:14:21,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:21,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:21,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245301063] [2021-05-03 14:14:21,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497031847] [2021-05-03 14:14:21,922 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 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:21,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:14:21,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:21,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:21,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:22,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:22,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-05-03 14:14:22,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205568720] [2021-05-03 14:14:22,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-03 14:14:22,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:22,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-03 14:14:22,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:14:22,020 INFO L87 Difference]: Start difference. First operand 59098 states and 197553 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:23,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:23,057 INFO L93 Difference]: Finished difference Result 59688 states and 199051 transitions. [2021-05-03 14:14:23,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-03 14:14:23,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:23,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:23,200 INFO L225 Difference]: With dead ends: 59688 [2021-05-03 14:14:23,200 INFO L226 Difference]: Without dead ends: 59688 [2021-05-03 14:14:23,200 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 390.2ms TimeCoverageRelationStatistics Valid=590, Invalid=1302, Unknown=0, NotChecked=0, Total=1892 [2021-05-03 14:14:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59688 states. [2021-05-03 14:14:24,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59688 to 59110. [2021-05-03 14:14:24,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59110 states, 59109 states have (on average 3.3427904380043647) internal successors, (197589), 59109 states have internal predecessors, (197589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59110 states to 59110 states and 197589 transitions. [2021-05-03 14:14:24,556 INFO L78 Accepts]: Start accepts. Automaton has 59110 states and 197589 transitions. Word has length 22 [2021-05-03 14:14:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:24,556 INFO L480 AbstractCegarLoop]: Abstraction has 59110 states and 197589 transitions. [2021-05-03 14:14:24,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 59110 states and 197589 transitions. [2021-05-03 14:14:24,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:24,569 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:24,569 INFO L551 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:24,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24759,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:24,769 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:24,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:24,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1544128547, now seen corresponding path program 342 times [2021-05-03 14:14:24,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:24,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062297809] [2021-05-03 14:14:24,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:24,911 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:24,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062297809] [2021-05-03 14:14:24,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392798616] [2021-05-03 14:14:24,911 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 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:24,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:14:24,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:24,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:24,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 66 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:25,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:25,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-05-03 14:14:25,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513449604] [2021-05-03 14:14:25,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:14:25,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:25,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:14:25,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:14:25,032 INFO L87 Difference]: Start difference. First operand 59110 states and 197589 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:25,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:25,496 INFO L93 Difference]: Finished difference Result 59635 states and 199005 transitions. [2021-05-03 14:14:25,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:14:25,497 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:25,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:25,634 INFO L225 Difference]: With dead ends: 59635 [2021-05-03 14:14:25,635 INFO L226 Difference]: Without dead ends: 59624 [2021-05-03 14:14:25,635 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 311.5ms TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:14:25,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59624 states. [2021-05-03 14:14:26,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59624 to 59109. [2021-05-03 14:14:26,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59109 states, 59108 states have (on average 3.342813155579617) internal successors, (197587), 59108 states have internal predecessors, (197587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:27,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59109 states to 59109 states and 197587 transitions. [2021-05-03 14:14:27,045 INFO L78 Accepts]: Start accepts. Automaton has 59109 states and 197587 transitions. Word has length 22 [2021-05-03 14:14:27,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:27,045 INFO L480 AbstractCegarLoop]: Abstraction has 59109 states and 197587 transitions. [2021-05-03 14:14:27,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 59109 states and 197587 transitions. [2021-05-03 14:14:27,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:14:27,059 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:27,059 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:27,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24760,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:27,269 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:27,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:27,269 INFO L82 PathProgramCache]: Analyzing trace with hash -155903798, now seen corresponding path program 343 times [2021-05-03 14:14:27,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:27,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676371230] [2021-05-03 14:14:27,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:27,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676371230] [2021-05-03 14:14:27,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474886784] [2021-05-03 14:14:27,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:27,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:14:27,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:27,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:27,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-05-03 14:14:27,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772345906] [2021-05-03 14:14:27,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-03 14:14:27,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:27,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-03 14:14:27,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:14:27,482 INFO L87 Difference]: Start difference. First operand 59109 states and 197587 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:28,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:28,490 INFO L93 Difference]: Finished difference Result 60371 states and 201009 transitions. [2021-05-03 14:14:28,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-03 14:14:28,491 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-03 14:14:28,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:28,652 INFO L225 Difference]: With dead ends: 60371 [2021-05-03 14:14:28,652 INFO L226 Difference]: Without dead ends: 60371 [2021-05-03 14:14:28,652 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 434.5ms TimeCoverageRelationStatistics Valid=781, Invalid=1669, Unknown=0, NotChecked=0, Total=2450 [2021-05-03 14:14:28,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60371 states. [2021-05-03 14:14:29,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60371 to 59170. [2021-05-03 14:14:29,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59170 states, 59169 states have (on average 3.3423921310145515) internal successors, (197766), 59169 states have internal predecessors, (197766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:29,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59170 states to 59170 states and 197766 transitions. [2021-05-03 14:14:29,939 INFO L78 Accepts]: Start accepts. Automaton has 59170 states and 197766 transitions. Word has length 22 [2021-05-03 14:14:29,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:29,940 INFO L480 AbstractCegarLoop]: Abstraction has 59170 states and 197766 transitions. [2021-05-03 14:14:29,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:29,940 INFO L276 IsEmpty]: Start isEmpty. Operand 59170 states and 197766 transitions. [2021-05-03 14:14:29,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 14:14:29,951 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:29,951 INFO L551 BasicCegarLoop]: trace histogram [11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:30,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24761 [2021-05-03 14:14:30,151 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:30,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:30,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1494166738, now seen corresponding path program 344 times [2021-05-03 14:14:30,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:30,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562428432] [2021-05-03 14:14:30,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 14:14:30,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562428432] [2021-05-03 14:14:30,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615875247] [2021-05-03 14:14:30,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:30,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:14:30,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:30,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:14:30,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:30,510 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 14:14:30,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:30,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-03 14:14:30,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651544570] [2021-05-03 14:14:30,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:14:30,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:30,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:14:30,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:14:30,511 INFO L87 Difference]: Start difference. First operand 59170 states and 197766 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:30,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:30,998 INFO L93 Difference]: Finished difference Result 65718 states and 216988 transitions. [2021-05-03 14:14:30,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:14:30,999 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-05-03 14:14:30,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:31,153 INFO L225 Difference]: With dead ends: 65718 [2021-05-03 14:14:31,153 INFO L226 Difference]: Without dead ends: 65718 [2021-05-03 14:14:31,153 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 286.7ms TimeCoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:14:31,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65718 states. [2021-05-03 14:14:32,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65718 to 59682. [2021-05-03 14:14:32,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59682 states, 59681 states have (on average 3.335332853001793) internal successors, (199056), 59681 states have internal predecessors, (199056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:32,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59682 states to 59682 states and 199056 transitions. [2021-05-03 14:14:32,924 INFO L78 Accepts]: Start accepts. Automaton has 59682 states and 199056 transitions. Word has length 23 [2021-05-03 14:14:32,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:32,924 INFO L480 AbstractCegarLoop]: Abstraction has 59682 states and 199056 transitions. [2021-05-03 14:14:32,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:32,924 INFO L276 IsEmpty]: Start isEmpty. Operand 59682 states and 199056 transitions. [2021-05-03 14:14:32,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:14:32,948 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:32,948 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:33,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24762 [2021-05-03 14:14:33,153 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:33,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1014106332, now seen corresponding path program 345 times [2021-05-03 14:14:33,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:33,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747596366] [2021-05-03 14:14:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:33,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 14:14:33,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747596366] [2021-05-03 14:14:33,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955506124] [2021-05-03 14:14:33,336 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 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:33,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:14:33,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:33,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-03 14:14:33,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 6 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:33,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:33,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 30 [2021-05-03 14:14:33,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58114172] [2021-05-03 14:14:33,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-03 14:14:33,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:33,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-03 14:14:33,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=789, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:14:33,757 INFO L87 Difference]: Start difference. First operand 59682 states and 199056 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 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) [2021-05-03 14:14:34,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:34,599 INFO L93 Difference]: Finished difference Result 68619 states and 225518 transitions. [2021-05-03 14:14:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:14:34,599 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-05-03 14:14:34,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:34,748 INFO L225 Difference]: With dead ends: 68619 [2021-05-03 14:14:34,748 INFO L226 Difference]: Without dead ends: 68619 [2021-05-03 14:14:34,749 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 780.5ms TimeCoverageRelationStatistics Valid=257, Invalid=1549, Unknown=0, NotChecked=0, Total=1806 [2021-05-03 14:14:34,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68619 states. [2021-05-03 14:14:35,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68619 to 60402. [2021-05-03 14:14:35,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60402 states, 60401 states have (on average 3.3286369430969684) internal successors, (201053), 60401 states have internal predecessors, (201053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:36,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60402 states to 60402 states and 201053 transitions. [2021-05-03 14:14:36,072 INFO L78 Accepts]: Start accepts. Automaton has 60402 states and 201053 transitions. Word has length 24 [2021-05-03 14:14:36,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:36,072 INFO L480 AbstractCegarLoop]: Abstraction has 60402 states and 201053 transitions. [2021-05-03 14:14:36,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 30 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) [2021-05-03 14:14:36,072 INFO L276 IsEmpty]: Start isEmpty. Operand 60402 states and 201053 transitions. [2021-05-03 14:14:36,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-03 14:14:36,094 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:36,094 INFO L551 BasicCegarLoop]: trace histogram [13, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:36,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24763 [2021-05-03 14:14:36,294 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:36,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:36,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1461160174, now seen corresponding path program 346 times [2021-05-03 14:14:36,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:36,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355352579] [2021-05-03 14:14:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:36,503 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 14:14:36,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355352579] [2021-05-03 14:14:36,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480330438] [2021-05-03 14:14:36,503 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 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:36,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:14:36,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:36,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:14:36,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 14:14:36,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:36,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-05-03 14:14:36,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488808274] [2021-05-03 14:14:36,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-03 14:14:36,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:36,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-03 14:14:36,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:14:36,776 INFO L87 Difference]: Start difference. First operand 60402 states and 201053 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 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) [2021-05-03 14:14:37,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:37,605 INFO L93 Difference]: Finished difference Result 72380 states and 236642 transitions. [2021-05-03 14:14:37,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:14:37,606 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 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 25 [2021-05-03 14:14:37,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:37,794 INFO L225 Difference]: With dead ends: 72380 [2021-05-03 14:14:37,795 INFO L226 Difference]: Without dead ends: 72380 [2021-05-03 14:14:37,795 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 404.0ms TimeCoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:14:37,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72380 states. [2021-05-03 14:14:39,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72380 to 61410. [2021-05-03 14:14:39,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61410 states, 61409 states have (on average 3.3206858929472878) internal successors, (203920), 61409 states have internal predecessors, (203920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:39,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61410 states to 61410 states and 203920 transitions. [2021-05-03 14:14:39,654 INFO L78 Accepts]: Start accepts. Automaton has 61410 states and 203920 transitions. Word has length 25 [2021-05-03 14:14:39,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:39,654 INFO L480 AbstractCegarLoop]: Abstraction has 61410 states and 203920 transitions. [2021-05-03 14:14:39,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 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) [2021-05-03 14:14:39,654 INFO L276 IsEmpty]: Start isEmpty. Operand 61410 states and 203920 transitions. [2021-05-03 14:14:39,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-03 14:14:39,690 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:39,690 INFO L551 BasicCegarLoop]: trace histogram [14, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:39,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24764 [2021-05-03 14:14:39,905 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:39,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:39,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1860039908, now seen corresponding path program 347 times [2021-05-03 14:14:39,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:39,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285795627] [2021-05-03 14:14:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:40,177 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 14:14:40,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285795627] [2021-05-03 14:14:40,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308617547] [2021-05-03 14:14:40,177 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 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:40,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-03 14:14:40,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:40,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-03 14:14:40,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 14:14:40,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:14:40,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-05-03 14:14:40,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903142297] [2021-05-03 14:14:40,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:14:40,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:14:40,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:14:40,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:14:40,539 INFO L87 Difference]: Start difference. First operand 61410 states and 203920 transitions. Second operand has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 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) [2021-05-03 14:14:41,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:14:41,640 INFO L93 Difference]: Finished difference Result 77095 states and 250630 transitions. [2021-05-03 14:14:41,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:14:41,642 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 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 26 [2021-05-03 14:14:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:14:41,913 INFO L225 Difference]: With dead ends: 77095 [2021-05-03 14:14:41,914 INFO L226 Difference]: Without dead ends: 77089 [2021-05-03 14:14:41,914 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 510.2ms TimeCoverageRelationStatistics Valid=79, Invalid=791, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:14:41,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77089 states. [2021-05-03 14:14:43,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77089 to 62989. [2021-05-03 14:14:43,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62989 states, 62988 states have (on average 3.301374865053661) internal successors, (207947), 62988 states have internal predecessors, (207947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:14:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62989 states to 62989 states and 207947 transitions. [2021-05-03 14:14:43,729 INFO L78 Accepts]: Start accepts. Automaton has 62989 states and 207947 transitions. Word has length 26 [2021-05-03 14:14:43,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:14:43,729 INFO L480 AbstractCegarLoop]: Abstraction has 62989 states and 207947 transitions. [2021-05-03 14:14:43,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 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) [2021-05-03 14:14:43,730 INFO L276 IsEmpty]: Start isEmpty. Operand 62989 states and 207947 transitions. [2021-05-03 14:14:43,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-03 14:14:43,782 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:14:43,782 INFO L551 BasicCegarLoop]: trace histogram [15, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:14:44,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24765 [2021-05-03 14:14:44,006 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:14:44,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:14:44,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1738027346, now seen corresponding path program 348 times [2021-05-03 14:14:44,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:14:44,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124192460] [2021-05-03 14:14:44,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:14:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:14:44,185 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:14:44,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124192460] [2021-05-03 14:14:44,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990727021] [2021-05-03 14:14:44,185 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 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:14:44,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-03 14:14:44,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:14:44,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-03 14:14:44,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:14:45,737 WARN L205 SmtUtils]: Spent 959.00 ms on a formula simplification that was a NOOP. DAG size: 451 [2021-05-03 14:14:45,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:14:45,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 29 new quantified variables, introduced 105 case distinctions, treesize of input 67 treesize of output 889 [2021-05-03 14:14:47,425 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 523 DAG size of output: 490 [2021-05-03 14:14:48,668 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1662 DAG size of output: 1405 [2021-05-03 14:14:51,274 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 2064 DAG size of output: 1711 [2021-05-03 14:14:51,479 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 3524 DAG size of output: 2916 [2021-05-03 14:14:55,640 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 3409 DAG size of output: 2802 [2021-05-03 14:14:56,082 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 6727 DAG size of output: 5044 [2021-05-03 14:14:56,571 WARN L205 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 6756 DAG size of output: 5072 [2021-05-03 14:14:57,036 WARN L205 SmtUtils]: Spent 429.00 ms on a formula simplification. DAG size of input: 6783 DAG size of output: 5098 [2021-05-03 14:14:59,235 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1979 DAG size of output: 1628 [2021-05-03 14:14:59,353 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 2011 DAG size of output: 1659 [2021-05-03 14:15:01,431 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 3422 DAG size of output: 2815 [2021-05-03 14:15:03,573 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1676 DAG size of output: 1419 [2021-05-03 14:15:06,009 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 2049 DAG size of output: 1697 [2021-05-03 14:15:06,133 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 2080 DAG size of output: 1727 [2021-05-03 14:15:06,354 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 3540 DAG size of output: 2932 [2021-05-03 14:15:06,847 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 6743 DAG size of output: 5048 [2021-05-03 14:15:07,556 WARN L205 SmtUtils]: Spent 656.00 ms on a formula simplification. DAG size of input: 6774 DAG size of output: 5078 [2021-05-03 14:15:08,156 WARN L205 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 6803 DAG size of output: 5106 [2021-05-03 14:15:09,233 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 13307 DAG size of output: 9920 [2021-05-03 14:15:10,372 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 13339 DAG size of output: 9923 [2021-05-03 14:15:11,672 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 13366 DAG size of output: 9950 [2021-05-03 14:15:13,983 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 2035 DAG size of output: 1683 [2021-05-03 14:15:14,134 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 2064 DAG size of output: 1711 [2021-05-03 14:15:16,387 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1662 DAG size of output: 1405 [2021-05-03 14:15:16,665 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 3524 DAG size of output: 2916 [2021-05-03 14:15:16,969 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 3567 DAG size of output: 2958 [2021-05-03 14:15:17,298 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 3596 DAG size of output: 2986 [2021-05-03 14:15:20,039 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1998 DAG size of output: 1646 [2021-05-03 14:15:23,032 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1594 DAG size of output: 1338 [2021-05-03 14:15:23,342 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 3409 DAG size of output: 2802 [2021-05-03 14:15:23,705 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 3452 DAG size of output: 2844 [2021-05-03 14:15:24,007 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 3482 DAG size of output: 2873 [2021-05-03 14:15:24,679 WARN L205 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 6806 DAG size of output: 5111 [2021-05-03 14:15:25,338 WARN L205 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 6834 DAG size of output: 5138 [2021-05-03 14:15:27,545 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1654 DAG size of output: 1397 [2021-05-03 14:15:30,121 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 2054 DAG size of output: 1700 [2021-05-03 14:15:30,387 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 3520 DAG size of output: 2911 [2021-05-03 14:15:30,672 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 3561 DAG size of output: 2951 [2021-05-03 14:15:30,962 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 3588 DAG size of output: 2977 [2021-05-03 14:15:33,206 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1984 DAG size of output: 1632 [2021-05-03 14:15:35,150 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 1582 DAG size of output: 1326 [2021-05-03 14:15:35,418 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 3395 DAG size of output: 2788 [2021-05-03 14:15:35,703 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 3436 DAG size of output: 2828 [2021-05-03 14:15:35,956 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 3464 DAG size of output: 2855 [2021-05-03 14:15:36,553 WARN L205 SmtUtils]: Spent 571.00 ms on a formula simplification. DAG size of input: 6798 DAG size of output: 5104 [2021-05-03 14:15:37,268 WARN L205 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 6824 DAG size of output: 5129 [2021-05-03 14:15:38,414 WARN L205 SmtUtils]: Spent 1.10 s on a formula simplification. DAG size of input: 13359 DAG size of output: 9964 [2021-05-03 14:15:39,746 WARN L205 SmtUtils]: Spent 1.24 s on a formula simplification. DAG size of input: 13391 DAG size of output: 9992 [2021-05-03 14:15:41,021 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 13417 DAG size of output: 10018 [2021-05-03 14:15:43,708 WARN L205 SmtUtils]: Spent 2.57 s on a formula simplification. DAG size of input: 26435 DAG size of output: 19636 [2021-05-03 14:15:45,956 WARN L205 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 26435 DAG size of output: 19636 [2021-05-03 14:15:49,015 WARN L205 SmtUtils]: Spent 2.94 s on a formula simplification. DAG size of input: 26460 DAG size of output: 19661 [2021-05-03 14:15:54,463 WARN L205 SmtUtils]: Spent 5.22 s on a formula simplification. DAG size of input: 19663 DAG size of output: 24744 [2021-05-03 14:16:00,102 WARN L205 SmtUtils]: Spent 5.35 s on a formula simplification. DAG size of input: 17088 DAG size of output: 20435 [2021-05-03 14:16:05,759 WARN L205 SmtUtils]: Spent 5.44 s on a formula simplification. DAG size of input: 17069 DAG size of output: 20765 [2021-05-03 14:16:10,756 WARN L205 SmtUtils]: Spent 4.79 s on a formula simplification. DAG size of input: 13416 DAG size of output: 16282 [2021-05-03 14:16:13,918 WARN L205 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 11525 DAG size of output: 14365 [2021-05-03 14:16:15,683 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 5320 DAG size of output: 7030 [2021-05-03 14:16:16,533 WARN L205 SmtUtils]: Spent 791.00 ms on a formula simplification. DAG size of input: 5049 DAG size of output: 5049 [2021-05-03 14:16:17,062 WARN L205 SmtUtils]: Spent 498.00 ms on a formula simplification. DAG size of input: 2654 DAG size of output: 2654 [2021-05-03 14:16:18,770 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1154 DAG size of output: 976 [2021-05-03 14:16:19,522 WARN L205 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 2626 DAG size of output: 4152 [2021-05-03 14:16:20,289 WARN L205 SmtUtils]: Spent 735.00 ms on a formula simplification. DAG size of input: 2619 DAG size of output: 3353 [2021-05-03 14:16:21,067 WARN L205 SmtUtils]: Spent 750.00 ms on a formula simplification. DAG size of input: 2288 DAG size of output: 2623 [2021-05-03 14:16:21,793 WARN L205 SmtUtils]: Spent 699.00 ms on a formula simplification. DAG size of input: 2285 DAG size of output: 3024 [2021-05-03 14:16:22,172 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 2281 DAG size of output: 2281 [2021-05-03 14:16:22,535 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 1263 DAG size of output: 1583 [2021-05-03 14:16:22,942 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 1216 DAG size of output: 1580 [2021-05-03 14:16:23,325 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 993 DAG size of output: 1242 [2021-05-03 14:16:23,654 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 980 [2021-05-03 14:16:23,893 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 957 DAG size of output: 985 [2021-05-03 14:16:25,963 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 479 DAG size of output: 651 [2021-05-03 14:16:28,204 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1073 DAG size of output: 962 [2021-05-03 14:16:28,425 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 1380 DAG size of output: 1152 [2021-05-03 14:16:28,697 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 1418 DAG size of output: 1176 [2021-05-03 14:16:28,990 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 1745 DAG size of output: 1414 [2021-05-03 14:16:29,308 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 2389 DAG size of output: 1770 [2021-05-03 14:16:29,745 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 2447 DAG size of output: 1817 [2021-05-03 14:16:30,296 WARN L205 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 3030 DAG size of output: 2003