/usr/bin/java -Xmx8000000000 -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/security.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:15:47,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:15:47,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:15:47,356 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:15:47,400 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 [2021-07-13 19:15:47,441 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:15:47,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:15:47,441 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:15:47,441 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:15:47,443 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:15:47,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:15:47,443 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:15:47,444 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:15:47,444 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:15:47,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:15:47,445 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:15:47,445 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:15:47,445 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:15:47,445 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:15:47,445 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:15:47,445 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:15:47,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:15:47,445 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:15:47,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:15:47,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:15:47,446 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:15:47,446 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:15:47,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:15:47,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:15:47,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:15:47,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:15:47,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:15:47,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:15:47,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:15:47,446 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:15:47,447 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:15:47,447 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:15:47,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:15:47,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:15:47,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:15:47,728 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:15:47,729 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:15:47,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl [2021-07-13 19:15:47,730 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl' [2021-07-13 19:15:47,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:15:47,750 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:15:47,751 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:15:47,751 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:15:47,751 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:15:47,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:15:47" (1/1) ... [2021-07-13 19:15:47,764 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:15:47" (1/1) ... [2021-07-13 19:15:47,769 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:15:47,770 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:15:47,770 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:15:47,770 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:15:47,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:15:47" (1/1) ... [2021-07-13 19:15:47,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:15:47" (1/1) ... [2021-07-13 19:15:47,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:15:47" (1/1) ... [2021-07-13 19:15:47,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:15:47" (1/1) ... [2021-07-13 19:15:47,779 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:15:47" (1/1) ... [2021-07-13 19:15:47,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:15:47" (1/1) ... [2021-07-13 19:15:47,780 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:15:47" (1/1) ... [2021-07-13 19:15:47,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:15:47,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:15:47,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:15:47,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:15:47,784 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:15:47" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:15:47,832 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:15:47,832 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:15:47,832 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:15:47,833 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:15:47,833 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:15:47,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:15:47,833 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:15:47,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:15:47,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:15:47,834 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:15:47,943 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:15:47,943 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:15:47,944 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:15:47 BoogieIcfgContainer [2021-07-13 19:15:47,945 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:15:47,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:15:47,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:15:47,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:15:47,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:15:47" (1/2) ... [2021-07-13 19:15:47,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d60e9d4 and model type security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:15:47, skipping insertion in model container [2021-07-13 19:15:47,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:15:47" (2/2) ... [2021-07-13 19:15:47,949 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.bpl [2021-07-13 19:15:47,953 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:15:47,953 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:15:47,953 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:15:47,954 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:15:47,989 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:15:48,004 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:15:48,016 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:15:48,016 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:15:48,016 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:15:48,017 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:15:48,017 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:15:48,017 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:15:48,017 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:15:48,017 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:15:48,023 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 28 transitions, 72 flow [2021-07-13 19:15:48,037 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 84 states, 83 states have (on average 2.1927710843373496) internal successors, (182), 83 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,039 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 83 states have (on average 2.1927710843373496) internal successors, (182), 83 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-13 19:15:48,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:48,044 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:48,045 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:48,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:48,048 INFO L82 PathProgramCache]: Analyzing trace with hash 515368400, now seen corresponding path program 1 times [2021-07-13 19:15:48,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:48,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016866621] [2021-07-13 19:15:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:48,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:48,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:48,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016866621] [2021-07-13 19:15:48,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016866621] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:48,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:48,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:15:48,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163155050] [2021-07-13 19:15:48,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:15:48,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:48,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:15:48,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:15:48,144 INFO L87 Difference]: Start difference. First operand has 84 states, 83 states have (on average 2.1927710843373496) internal successors, (182), 83 states have internal predecessors, (182), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:48,176 INFO L93 Difference]: Finished difference Result 131 states and 269 transitions. [2021-07-13 19:15:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:15:48,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:15:48,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:48,184 INFO L225 Difference]: With dead ends: 131 [2021-07-13 19:15:48,184 INFO L226 Difference]: Without dead ends: 131 [2021-07-13 19:15:48,185 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:15:48,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-13 19:15:48,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2021-07-13 19:15:48,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1847826086956523) internal successors, (201), 92 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 201 transitions. [2021-07-13 19:15:48,214 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 201 transitions. Word has length 16 [2021-07-13 19:15:48,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:48,214 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 201 transitions. [2021-07-13 19:15:48,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,214 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 201 transitions. [2021-07-13 19:15:48,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:15:48,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:48,215 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:48,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:15:48,215 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:48,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:48,216 INFO L82 PathProgramCache]: Analyzing trace with hash 2051020952, now seen corresponding path program 1 times [2021-07-13 19:15:48,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:48,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429913502] [2021-07-13 19:15:48,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:48,231 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:48,231 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429913502] [2021-07-13 19:15:48,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429913502] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:48,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:48,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-13 19:15:48,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958945556] [2021-07-13 19:15:48,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:15:48,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:48,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:15:48,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:15:48,234 INFO L87 Difference]: Start difference. First operand 93 states and 201 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2021-07-13 19:15:48,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:48,245 INFO L93 Difference]: Finished difference Result 136 states and 278 transitions. [2021-07-13 19:15:48,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:15:48,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-13 19:15:48,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:48,247 INFO L225 Difference]: With dead ends: 136 [2021-07-13 19:15:48,247 INFO L226 Difference]: Without dead ends: 136 [2021-07-13 19:15:48,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:15:48,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-13 19:15:48,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 103. [2021-07-13 19:15:48,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.176470588235294) internal successors, (222), 102 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 222 transitions. [2021-07-13 19:15:48,261 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 222 transitions. Word has length 17 [2021-07-13 19:15:48,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:48,261 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 222 transitions. [2021-07-13 19:15:48,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2021-07-13 19:15:48,262 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 222 transitions. [2021-07-13 19:15:48,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:48,263 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:48,263 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:48,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-13 19:15:48,263 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:48,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:48,263 INFO L82 PathProgramCache]: Analyzing trace with hash -124034957, now seen corresponding path program 1 times [2021-07-13 19:15:48,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:48,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824920401] [2021-07-13 19:15:48,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:48,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:48,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824920401] [2021-07-13 19:15:48,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824920401] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:48,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:48,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:15:48,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117549632] [2021-07-13 19:15:48,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:15:48,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:48,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:15:48,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:15:48,337 INFO L87 Difference]: Start difference. First operand 103 states and 222 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:48,401 INFO L93 Difference]: Finished difference Result 171 states and 344 transitions. [2021-07-13 19:15:48,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:15:48,402 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:48,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:48,403 INFO L225 Difference]: With dead ends: 171 [2021-07-13 19:15:48,403 INFO L226 Difference]: Without dead ends: 161 [2021-07-13 19:15:48,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:48,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-13 19:15:48,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 118. [2021-07-13 19:15:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1538461538461537) internal successors, (252), 117 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 252 transitions. [2021-07-13 19:15:48,414 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 252 transitions. Word has length 18 [2021-07-13 19:15:48,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:48,414 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 252 transitions. [2021-07-13 19:15:48,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,414 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 252 transitions. [2021-07-13 19:15:48,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:48,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:48,415 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:48,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-13 19:15:48,415 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:48,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:48,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1760059086, now seen corresponding path program 1 times [2021-07-13 19:15:48,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:48,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057316964] [2021-07-13 19:15:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:48,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:48,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057316964] [2021-07-13 19:15:48,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057316964] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:48,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:48,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:48,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988329273] [2021-07-13 19:15:48,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:48,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:48,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:48,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:48,476 INFO L87 Difference]: Start difference. First operand 118 states and 252 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:48,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:48,585 INFO L93 Difference]: Finished difference Result 189 states and 374 transitions. [2021-07-13 19:15:48,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:15:48,585 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:48,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:48,587 INFO L225 Difference]: With dead ends: 189 [2021-07-13 19:15:48,588 INFO L226 Difference]: Without dead ends: 156 [2021-07-13 19:15:48,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:15:48,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-13 19:15:48,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 113. [2021-07-13 19:15:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1607142857142856) internal successors, (242), 112 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 242 transitions. [2021-07-13 19:15:48,597 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 242 transitions. Word has length 18 [2021-07-13 19:15:48,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:48,597 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 242 transitions. [2021-07-13 19:15:48,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:48,597 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 242 transitions. [2021-07-13 19:15:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:48,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:48,598 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:48,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:15:48,599 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:48,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:48,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1024175242, now seen corresponding path program 2 times [2021-07-13 19:15:48,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:48,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716489054] [2021-07-13 19:15:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:48,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:48,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716489054] [2021-07-13 19:15:48,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716489054] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:48,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:48,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:48,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744186486] [2021-07-13 19:15:48,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:48,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:48,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:48,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:48,659 INFO L87 Difference]: Start difference. First operand 113 states and 242 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:48,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:48,742 INFO L93 Difference]: Finished difference Result 217 states and 436 transitions. [2021-07-13 19:15:48,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:15:48,742 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:48,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:48,744 INFO L225 Difference]: With dead ends: 217 [2021-07-13 19:15:48,744 INFO L226 Difference]: Without dead ends: 189 [2021-07-13 19:15:48,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:48,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-07-13 19:15:48,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 126. [2021-07-13 19:15:48,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.176) internal successors, (272), 125 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 272 transitions. [2021-07-13 19:15:48,762 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 272 transitions. Word has length 18 [2021-07-13 19:15:48,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:48,762 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 272 transitions. [2021-07-13 19:15:48,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:48,762 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 272 transitions. [2021-07-13 19:15:48,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:48,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:48,765 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:48,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 19:15:48,766 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:48,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:48,767 INFO L82 PathProgramCache]: Analyzing trace with hash -140139653, now seen corresponding path program 2 times [2021-07-13 19:15:48,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:48,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476053864] [2021-07-13 19:15:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:48,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:48,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476053864] [2021-07-13 19:15:48,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476053864] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:48,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:48,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:15:48,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433469804] [2021-07-13 19:15:48,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:15:48,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:48,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:15:48,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:15:48,840 INFO L87 Difference]: Start difference. First operand 126 states and 272 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:48,906 INFO L93 Difference]: Finished difference Result 208 states and 418 transitions. [2021-07-13 19:15:48,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:15:48,907 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:48,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:48,908 INFO L225 Difference]: With dead ends: 208 [2021-07-13 19:15:48,908 INFO L226 Difference]: Without dead ends: 199 [2021-07-13 19:15:48,908 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:48,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-13 19:15:48,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 130. [2021-07-13 19:15:48,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.193798449612403) internal successors, (283), 129 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 283 transitions. [2021-07-13 19:15:48,918 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 283 transitions. Word has length 18 [2021-07-13 19:15:48,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:48,918 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 283 transitions. [2021-07-13 19:15:48,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:48,919 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 283 transitions. [2021-07-13 19:15:48,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:48,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:48,921 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:48,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-07-13 19:15:48,921 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:48,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:48,922 INFO L82 PathProgramCache]: Analyzing trace with hash 753224345, now seen corresponding path program 3 times [2021-07-13 19:15:48,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:48,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648689729] [2021-07-13 19:15:48,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:48,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:48,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648689729] [2021-07-13 19:15:48,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648689729] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:48,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:48,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:15:48,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491150850] [2021-07-13 19:15:48,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:15:48,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:48,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:15:48,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:15:49,000 INFO L87 Difference]: Start difference. First operand 130 states and 283 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:49,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:49,055 INFO L93 Difference]: Finished difference Result 200 states and 407 transitions. [2021-07-13 19:15:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:15:49,055 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:49,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:49,056 INFO L225 Difference]: With dead ends: 200 [2021-07-13 19:15:49,056 INFO L226 Difference]: Without dead ends: 186 [2021-07-13 19:15:49,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:49,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-13 19:15:49,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 123. [2021-07-13 19:15:49,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.19672131147541) internal successors, (268), 122 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 268 transitions. [2021-07-13 19:15:49,060 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 268 transitions. Word has length 18 [2021-07-13 19:15:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:49,060 INFO L482 AbstractCegarLoop]: Abstraction has 123 states and 268 transitions. [2021-07-13 19:15:49,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:49,061 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 268 transitions. [2021-07-13 19:15:49,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:49,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:49,061 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:49,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-07-13 19:15:49,061 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:49,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:49,062 INFO L82 PathProgramCache]: Analyzing trace with hash 353908316, now seen corresponding path program 3 times [2021-07-13 19:15:49,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:49,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118190143] [2021-07-13 19:15:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:49,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:49,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:49,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:49,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118190143] [2021-07-13 19:15:49,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118190143] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:49,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:49,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:49,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264606136] [2021-07-13 19:15:49,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:49,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:49,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:49,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:49,153 INFO L87 Difference]: Start difference. First operand 123 states and 268 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:49,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:49,267 INFO L93 Difference]: Finished difference Result 217 states and 431 transitions. [2021-07-13 19:15:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:15:49,267 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:49,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:49,269 INFO L225 Difference]: With dead ends: 217 [2021-07-13 19:15:49,269 INFO L226 Difference]: Without dead ends: 208 [2021-07-13 19:15:49,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-13 19:15:49,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 125. [2021-07-13 19:15:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.193548387096774) internal successors, (272), 124 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:49,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 272 transitions. [2021-07-13 19:15:49,276 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 272 transitions. Word has length 18 [2021-07-13 19:15:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:49,277 INFO L482 AbstractCegarLoop]: Abstraction has 125 states and 272 transitions. [2021-07-13 19:15:49,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:49,278 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 272 transitions. [2021-07-13 19:15:49,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:49,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:49,278 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:49,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-13 19:15:49,278 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:49,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:49,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1247272314, now seen corresponding path program 4 times [2021-07-13 19:15:49,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:49,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253595551] [2021-07-13 19:15:49,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:49,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:49,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253595551] [2021-07-13 19:15:49,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253595551] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:49,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:49,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:49,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569625059] [2021-07-13 19:15:49,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:49,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:49,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:49,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:49,355 INFO L87 Difference]: Start difference. First operand 125 states and 272 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:49,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:49,459 INFO L93 Difference]: Finished difference Result 210 states and 422 transitions. [2021-07-13 19:15:49,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:15:49,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:49,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:49,461 INFO L225 Difference]: With dead ends: 210 [2021-07-13 19:15:49,461 INFO L226 Difference]: Without dead ends: 191 [2021-07-13 19:15:49,461 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 99.0ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:49,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-07-13 19:15:49,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 110. [2021-07-13 19:15:49,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.18348623853211) internal successors, (238), 109 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 238 transitions. [2021-07-13 19:15:49,464 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 238 transitions. Word has length 18 [2021-07-13 19:15:49,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:49,464 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 238 transitions. [2021-07-13 19:15:49,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:49,464 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 238 transitions. [2021-07-13 19:15:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:49,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:49,465 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:49,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-13 19:15:49,465 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:49,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:49,465 INFO L82 PathProgramCache]: Analyzing trace with hash -62451926, now seen corresponding path program 5 times [2021-07-13 19:15:49,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:49,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711249945] [2021-07-13 19:15:49,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:49,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:49,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:49,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711249945] [2021-07-13 19:15:49,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711249945] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:49,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:49,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:49,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65539473] [2021-07-13 19:15:49,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:49,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:49,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:49,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:49,505 INFO L87 Difference]: Start difference. First operand 110 states and 238 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:49,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:49,577 INFO L93 Difference]: Finished difference Result 164 states and 328 transitions. [2021-07-13 19:15:49,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:15:49,578 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:49,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:49,578 INFO L225 Difference]: With dead ends: 164 [2021-07-13 19:15:49,578 INFO L226 Difference]: Without dead ends: 136 [2021-07-13 19:15:49,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-13 19:15:49,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 110. [2021-07-13 19:15:49,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:49,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-07-13 19:15:49,581 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 18 [2021-07-13 19:15:49,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:49,582 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-07-13 19:15:49,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:49,582 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-07-13 19:15:49,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:49,582 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:49,582 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:49,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-13 19:15:49,583 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:49,583 INFO L82 PathProgramCache]: Analyzing trace with hash -732718852, now seen corresponding path program 6 times [2021-07-13 19:15:49,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:49,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267509034] [2021-07-13 19:15:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:49,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:49,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267509034] [2021-07-13 19:15:49,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267509034] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:49,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:49,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:49,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900233265] [2021-07-13 19:15:49,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:49,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:49,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:49,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:49,624 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:49,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:49,727 INFO L93 Difference]: Finished difference Result 169 states and 326 transitions. [2021-07-13 19:15:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:15:49,728 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:49,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:49,729 INFO L225 Difference]: With dead ends: 169 [2021-07-13 19:15:49,729 INFO L226 Difference]: Without dead ends: 160 [2021-07-13 19:15:49,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:49,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-13 19:15:49,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2021-07-13 19:15:49,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.135135135135135) internal successors, (237), 111 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:49,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 237 transitions. [2021-07-13 19:15:49,732 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 237 transitions. Word has length 18 [2021-07-13 19:15:49,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:49,732 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 237 transitions. [2021-07-13 19:15:49,732 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:49,732 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 237 transitions. [2021-07-13 19:15:49,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:49,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:49,732 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:49,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-07-13 19:15:49,733 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:49,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:49,733 INFO L82 PathProgramCache]: Analyzing trace with hash 160645146, now seen corresponding path program 7 times [2021-07-13 19:15:49,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:49,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378830874] [2021-07-13 19:15:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:49,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:49,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:49,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378830874] [2021-07-13 19:15:49,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378830874] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:49,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:49,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:49,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207891365] [2021-07-13 19:15:49,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:49,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:49,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:49,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:49,774 INFO L87 Difference]: Start difference. First operand 112 states and 237 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:49,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:49,847 INFO L93 Difference]: Finished difference Result 156 states and 307 transitions. [2021-07-13 19:15:49,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:15:49,847 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:49,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:49,848 INFO L225 Difference]: With dead ends: 156 [2021-07-13 19:15:49,848 INFO L226 Difference]: Without dead ends: 139 [2021-07-13 19:15:49,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:49,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-07-13 19:15:49,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 101. [2021-07-13 19:15:49,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.1) internal successors, (210), 100 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:49,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2021-07-13 19:15:49,851 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 18 [2021-07-13 19:15:49,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:49,851 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2021-07-13 19:15:49,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:49,851 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2021-07-13 19:15:49,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:49,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:49,851 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:49,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-13 19:15:49,851 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:49,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:49,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1835169953, now seen corresponding path program 4 times [2021-07-13 19:15:49,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:49,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189509742] [2021-07-13 19:15:49,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:49,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:49,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189509742] [2021-07-13 19:15:49,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189509742] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:49,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:49,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:15:49,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269653384] [2021-07-13 19:15:49,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:15:49,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:49,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:15:49,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:15:49,883 INFO L87 Difference]: Start difference. First operand 101 states and 210 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:49,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:49,928 INFO L93 Difference]: Finished difference Result 156 states and 303 transitions. [2021-07-13 19:15:49,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:15:49,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:49,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:49,929 INFO L225 Difference]: With dead ends: 156 [2021-07-13 19:15:49,929 INFO L226 Difference]: Without dead ends: 147 [2021-07-13 19:15:49,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:49,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-13 19:15:49,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2021-07-13 19:15:49,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:49,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-07-13 19:15:49,932 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 18 [2021-07-13 19:15:49,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:49,932 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-07-13 19:15:49,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:49,932 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-07-13 19:15:49,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:49,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:49,933 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:49,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-13 19:15:49,933 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:49,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:49,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1156500989, now seen corresponding path program 5 times [2021-07-13 19:15:49,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:49,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017950106] [2021-07-13 19:15:49,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:49,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:49,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017950106] [2021-07-13 19:15:49,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017950106] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:49,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:49,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:15:49,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224383129] [2021-07-13 19:15:49,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:15:49,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:49,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:15:49,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:15:49,964 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:50,013 INFO L93 Difference]: Finished difference Result 175 states and 330 transitions. [2021-07-13 19:15:50,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:15:50,013 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:50,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:50,014 INFO L225 Difference]: With dead ends: 175 [2021-07-13 19:15:50,014 INFO L226 Difference]: Without dead ends: 166 [2021-07-13 19:15:50,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:50,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-13 19:15:50,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 112. [2021-07-13 19:15:50,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-07-13 19:15:50,017 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 18 [2021-07-13 19:15:50,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:50,017 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-07-13 19:15:50,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,017 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-07-13 19:15:50,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:50,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:50,018 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:50,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-13 19:15:50,018 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:50,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:50,018 INFO L82 PathProgramCache]: Analyzing trace with hash 774326845, now seen corresponding path program 6 times [2021-07-13 19:15:50,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:50,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784823827] [2021-07-13 19:15:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:50,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:50,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:50,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784823827] [2021-07-13 19:15:50,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784823827] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:50,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:50,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-07-13 19:15:50,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028901343] [2021-07-13 19:15:50,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:15:50,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:50,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:15:50,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:15:50,048 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:50,095 INFO L93 Difference]: Finished difference Result 160 states and 308 transitions. [2021-07-13 19:15:50,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:15:50,096 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:50,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:50,096 INFO L225 Difference]: With dead ends: 160 [2021-07-13 19:15:50,097 INFO L226 Difference]: Without dead ends: 145 [2021-07-13 19:15:50,097 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:15:50,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-13 19:15:50,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 105. [2021-07-13 19:15:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0865384615384617) internal successors, (217), 104 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 217 transitions. [2021-07-13 19:15:50,099 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 217 transitions. Word has length 18 [2021-07-13 19:15:50,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:50,099 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 217 transitions. [2021-07-13 19:15:50,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,099 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 217 transitions. [2021-07-13 19:15:50,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:50,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:50,100 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:50,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-07-13 19:15:50,100 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:50,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:50,100 INFO L82 PathProgramCache]: Analyzing trace with hash 498525696, now seen corresponding path program 8 times [2021-07-13 19:15:50,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:50,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407583182] [2021-07-13 19:15:50,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:50,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:50,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:50,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407583182] [2021-07-13 19:15:50,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407583182] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:50,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:50,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:50,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76723820] [2021-07-13 19:15:50,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:50,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:50,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:50,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:50,138 INFO L87 Difference]: Start difference. First operand 105 states and 217 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:50,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:50,201 INFO L93 Difference]: Finished difference Result 129 states and 257 transitions. [2021-07-13 19:15:50,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:15:50,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:50,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:50,202 INFO L225 Difference]: With dead ends: 129 [2021-07-13 19:15:50,202 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 19:15:50,202 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:50,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 19:15:50,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2021-07-13 19:15:50,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.1020408163265305) internal successors, (206), 98 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 206 transitions. [2021-07-13 19:15:50,205 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 206 transitions. Word has length 18 [2021-07-13 19:15:50,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:50,205 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 206 transitions. [2021-07-13 19:15:50,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:50,205 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 206 transitions. [2021-07-13 19:15:50,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:50,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:50,205 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:50,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-07-13 19:15:50,206 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:50,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:50,206 INFO L82 PathProgramCache]: Analyzing trace with hash -804770658, now seen corresponding path program 9 times [2021-07-13 19:15:50,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:50,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184535622] [2021-07-13 19:15:50,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:50,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:50,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:50,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:50,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184535622] [2021-07-13 19:15:50,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184535622] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:50,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:50,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:50,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152699426] [2021-07-13 19:15:50,241 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:50,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:50,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:50,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:50,242 INFO L87 Difference]: Start difference. First operand 99 states and 206 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:50,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:50,323 INFO L93 Difference]: Finished difference Result 144 states and 278 transitions. [2021-07-13 19:15:50,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:15:50,323 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:50,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:50,324 INFO L225 Difference]: With dead ends: 144 [2021-07-13 19:15:50,324 INFO L226 Difference]: Without dead ends: 135 [2021-07-13 19:15:50,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:50,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-13 19:15:50,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 98. [2021-07-13 19:15:50,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 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) [2021-07-13 19:15:50,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 202 transitions. [2021-07-13 19:15:50,326 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 202 transitions. Word has length 18 [2021-07-13 19:15:50,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:50,326 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 202 transitions. [2021-07-13 19:15:50,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:50,326 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 202 transitions. [2021-07-13 19:15:50,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:50,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:50,327 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:50,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-07-13 19:15:50,327 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:50,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:50,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1186944802, now seen corresponding path program 10 times [2021-07-13 19:15:50,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:50,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191515369] [2021-07-13 19:15:50,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:50,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:50,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191515369] [2021-07-13 19:15:50,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191515369] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:50,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:50,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:50,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541861061] [2021-07-13 19:15:50,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:50,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:50,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:50,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:50,362 INFO L87 Difference]: Start difference. First operand 98 states and 202 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:50,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:50,427 INFO L93 Difference]: Finished difference Result 127 states and 253 transitions. [2021-07-13 19:15:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:15:50,427 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:50,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:50,428 INFO L225 Difference]: With dead ends: 127 [2021-07-13 19:15:50,428 INFO L226 Difference]: Without dead ends: 116 [2021-07-13 19:15:50,428 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:50,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-07-13 19:15:50,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2021-07-13 19:15:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 92 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 191 transitions. [2021-07-13 19:15:50,430 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 191 transitions. Word has length 18 [2021-07-13 19:15:50,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:50,430 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 191 transitions. [2021-07-13 19:15:50,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:50,430 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 191 transitions. [2021-07-13 19:15:50,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:50,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:50,431 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:50,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-07-13 19:15:50,431 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:50,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:50,431 INFO L82 PathProgramCache]: Analyzing trace with hash 579579668, now seen corresponding path program 1 times [2021-07-13 19:15:50,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:50,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42145620] [2021-07-13 19:15:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:50,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:50,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:50,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42145620] [2021-07-13 19:15:50,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42145620] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:50,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:50,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:50,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688527600] [2021-07-13 19:15:50,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:50,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:50,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:50,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:50,467 INFO L87 Difference]: Start difference. First operand 93 states and 191 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:50,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:50,529 INFO L93 Difference]: Finished difference Result 129 states and 259 transitions. [2021-07-13 19:15:50,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:15:50,530 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:50,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:50,530 INFO L225 Difference]: With dead ends: 129 [2021-07-13 19:15:50,530 INFO L226 Difference]: Without dead ends: 119 [2021-07-13 19:15:50,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:50,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-13 19:15:50,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2021-07-13 19:15:50,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0760869565217392) internal successors, (191), 92 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 191 transitions. [2021-07-13 19:15:50,533 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 191 transitions. Word has length 18 [2021-07-13 19:15:50,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:50,533 INFO L482 AbstractCegarLoop]: Abstraction has 93 states and 191 transitions. [2021-07-13 19:15:50,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 191 transitions. [2021-07-13 19:15:50,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:50,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:50,533 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:50,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-07-13 19:15:50,534 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:50,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:50,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1056444461, now seen corresponding path program 1 times [2021-07-13 19:15:50,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:50,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842783045] [2021-07-13 19:15:50,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:50,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:50,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:50,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842783045] [2021-07-13 19:15:50,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842783045] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:50,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:50,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:50,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510007137] [2021-07-13 19:15:50,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:50,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:50,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:50,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:50,577 INFO L87 Difference]: Start difference. First operand 93 states and 191 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:50,699 INFO L93 Difference]: Finished difference Result 147 states and 289 transitions. [2021-07-13 19:15:50,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:15:50,699 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:50,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:50,699 INFO L225 Difference]: With dead ends: 147 [2021-07-13 19:15:50,700 INFO L226 Difference]: Without dead ends: 114 [2021-07-13 19:15:50,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:50,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-13 19:15:50,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 88. [2021-07-13 19:15:50,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.0804597701149423) internal successors, (181), 87 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 181 transitions. [2021-07-13 19:15:50,702 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 181 transitions. Word has length 18 [2021-07-13 19:15:50,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:50,702 INFO L482 AbstractCegarLoop]: Abstraction has 88 states and 181 transitions. [2021-07-13 19:15:50,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,702 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 181 transitions. [2021-07-13 19:15:50,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:50,702 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:50,702 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:50,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-07-13 19:15:50,702 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:50,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:50,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1727789867, now seen corresponding path program 2 times [2021-07-13 19:15:50,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:50,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754117788] [2021-07-13 19:15:50,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:50,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:50,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754117788] [2021-07-13 19:15:50,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754117788] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:50,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:50,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:50,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617107740] [2021-07-13 19:15:50,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:50,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:50,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:50,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:50,767 INFO L87 Difference]: Start difference. First operand 88 states and 181 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:50,874 INFO L93 Difference]: Finished difference Result 175 states and 343 transitions. [2021-07-13 19:15:50,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:15:50,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:50,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:50,875 INFO L225 Difference]: With dead ends: 175 [2021-07-13 19:15:50,875 INFO L226 Difference]: Without dead ends: 147 [2021-07-13 19:15:50,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:50,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-13 19:15:50,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2021-07-13 19:15:50,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.073394495412844) internal successors, (226), 109 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 226 transitions. [2021-07-13 19:15:50,877 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 226 transitions. Word has length 18 [2021-07-13 19:15:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:50,877 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 226 transitions. [2021-07-13 19:15:50,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:50,877 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 226 transitions. [2021-07-13 19:15:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:50,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:50,878 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:50,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-07-13 19:15:50,878 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:50,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:50,878 INFO L82 PathProgramCache]: Analyzing trace with hash 563474972, now seen corresponding path program 2 times [2021-07-13 19:15:50,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:50,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762111847] [2021-07-13 19:15:50,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:50,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:50,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762111847] [2021-07-13 19:15:50,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762111847] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:50,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:50,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:50,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939093351] [2021-07-13 19:15:50,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:50,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:50,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:50,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:50,933 INFO L87 Difference]: Start difference. First operand 110 states and 226 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:51,008 INFO L93 Difference]: Finished difference Result 172 states and 336 transitions. [2021-07-13 19:15:51,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:15:51,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:51,009 INFO L225 Difference]: With dead ends: 172 [2021-07-13 19:15:51,009 INFO L226 Difference]: Without dead ends: 159 [2021-07-13 19:15:51,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:51,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-07-13 19:15:51,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 120. [2021-07-13 19:15:51,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-07-13 19:15:51,012 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 18 [2021-07-13 19:15:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:51,012 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-07-13 19:15:51,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:51,012 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-07-13 19:15:51,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:51,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:51,013 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:51,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-07-13 19:15:51,013 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:51,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:51,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1456838970, now seen corresponding path program 3 times [2021-07-13 19:15:51,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:51,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621549157] [2021-07-13 19:15:51,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:51,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:51,055 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:51,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621549157] [2021-07-13 19:15:51,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621549157] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:51,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:51,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:51,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201520148] [2021-07-13 19:15:51,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:51,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:51,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:51,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:51,056 INFO L87 Difference]: Start difference. First operand 120 states and 248 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:51,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:51,129 INFO L93 Difference]: Finished difference Result 160 states and 319 transitions. [2021-07-13 19:15:51,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:15:51,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:51,130 INFO L225 Difference]: With dead ends: 160 [2021-07-13 19:15:51,130 INFO L226 Difference]: Without dead ends: 144 [2021-07-13 19:15:51,130 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:51,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-13 19:15:51,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 108. [2021-07-13 19:15:51,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.074766355140187) internal successors, (222), 107 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 222 transitions. [2021-07-13 19:15:51,133 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 222 transitions. Word has length 18 [2021-07-13 19:15:51,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:51,133 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 222 transitions. [2021-07-13 19:15:51,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:51,133 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 222 transitions. [2021-07-13 19:15:51,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:51,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:51,133 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:51,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-07-13 19:15:51,133 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:51,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:51,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1057522941, now seen corresponding path program 3 times [2021-07-13 19:15:51,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:51,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271107721] [2021-07-13 19:15:51,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:51,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:51,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271107721] [2021-07-13 19:15:51,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271107721] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:51,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:51,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:51,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090951760] [2021-07-13 19:15:51,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:51,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:51,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:51,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:51,179 INFO L87 Difference]: Start difference. First operand 108 states and 222 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:51,291 INFO L93 Difference]: Finished difference Result 166 states and 316 transitions. [2021-07-13 19:15:51,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:15:51,291 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:51,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:51,291 INFO L225 Difference]: With dead ends: 166 [2021-07-13 19:15:51,292 INFO L226 Difference]: Without dead ends: 153 [2021-07-13 19:15:51,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-13 19:15:51,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 111. [2021-07-13 19:15:51,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-07-13 19:15:51,294 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 18 [2021-07-13 19:15:51,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:51,294 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-07-13 19:15:51,294 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,294 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-07-13 19:15:51,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:51,294 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:51,294 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:51,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-07-13 19:15:51,295 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:51,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:51,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1950886939, now seen corresponding path program 4 times [2021-07-13 19:15:51,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:51,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098118984] [2021-07-13 19:15:51,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:51,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:51,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:51,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098118984] [2021-07-13 19:15:51,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098118984] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:51,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:51,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:51,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399841063] [2021-07-13 19:15:51,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:51,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:51,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:51,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:51,337 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:51,465 INFO L93 Difference]: Finished difference Result 157 states and 304 transitions. [2021-07-13 19:15:51,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:15:51,466 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:51,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:51,466 INFO L225 Difference]: With dead ends: 157 [2021-07-13 19:15:51,466 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 19:15:51,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:51,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 19:15:51,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2021-07-13 19:15:51,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 89 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 185 transitions. [2021-07-13 19:15:51,468 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 185 transitions. Word has length 18 [2021-07-13 19:15:51,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:51,469 INFO L482 AbstractCegarLoop]: Abstraction has 90 states and 185 transitions. [2021-07-13 19:15:51,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,469 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 185 transitions. [2021-07-13 19:15:51,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:51,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:51,469 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:51,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-07-13 19:15:51,469 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:51,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:51,469 INFO L82 PathProgramCache]: Analyzing trace with hash 460332689, now seen corresponding path program 5 times [2021-07-13 19:15:51,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:51,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314850839] [2021-07-13 19:15:51,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:51,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:51,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314850839] [2021-07-13 19:15:51,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314850839] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:51,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:51,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:51,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584901922] [2021-07-13 19:15:51,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:51,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:51,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:51,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:51,523 INFO L87 Difference]: Start difference. First operand 90 states and 185 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:51,640 INFO L93 Difference]: Finished difference Result 189 states and 381 transitions. [2021-07-13 19:15:51,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:15:51,640 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:51,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:51,641 INFO L225 Difference]: With dead ends: 189 [2021-07-13 19:15:51,641 INFO L226 Difference]: Without dead ends: 161 [2021-07-13 19:15:51,641 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:51,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-13 19:15:51,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 122. [2021-07-13 19:15:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.15702479338843) internal successors, (261), 121 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 261 transitions. [2021-07-13 19:15:51,644 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 261 transitions. Word has length 18 [2021-07-13 19:15:51,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:51,644 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 261 transitions. [2021-07-13 19:15:51,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,645 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 261 transitions. [2021-07-13 19:15:51,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:51,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:51,646 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:51,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-07-13 19:15:51,646 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:51,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:51,646 INFO L82 PathProgramCache]: Analyzing trace with hash -209934237, now seen corresponding path program 6 times [2021-07-13 19:15:51,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:51,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094697747] [2021-07-13 19:15:51,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:51,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:51,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:51,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:51,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094697747] [2021-07-13 19:15:51,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094697747] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:51,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:51,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:51,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184203287] [2021-07-13 19:15:51,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:51,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:51,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:51,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:51,718 INFO L87 Difference]: Start difference. First operand 122 states and 261 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:51,854 INFO L93 Difference]: Finished difference Result 195 states and 376 transitions. [2021-07-13 19:15:51,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:15:51,856 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:51,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:51,857 INFO L225 Difference]: With dead ends: 195 [2021-07-13 19:15:51,857 INFO L226 Difference]: Without dead ends: 182 [2021-07-13 19:15:51,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:51,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-07-13 19:15:51,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 131. [2021-07-13 19:15:51,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1384615384615384) internal successors, (278), 130 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 278 transitions. [2021-07-13 19:15:51,863 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 278 transitions. Word has length 18 [2021-07-13 19:15:51,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:51,863 INFO L482 AbstractCegarLoop]: Abstraction has 131 states and 278 transitions. [2021-07-13 19:15:51,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:51,863 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 278 transitions. [2021-07-13 19:15:51,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:51,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:51,863 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:51,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-07-13 19:15:51,863 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:51,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:51,864 INFO L82 PathProgramCache]: Analyzing trace with hash 683429761, now seen corresponding path program 7 times [2021-07-13 19:15:51,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:51,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125059953] [2021-07-13 19:15:51,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:51,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:51,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:51,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:51,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125059953] [2021-07-13 19:15:51,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125059953] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:51,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:51,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:51,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643479227] [2021-07-13 19:15:51,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:51,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:51,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:51,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:51,936 INFO L87 Difference]: Start difference. First operand 131 states and 278 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:52,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:52,044 INFO L93 Difference]: Finished difference Result 180 states and 354 transitions. [2021-07-13 19:15:52,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:15:52,044 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:52,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:52,045 INFO L225 Difference]: With dead ends: 180 [2021-07-13 19:15:52,045 INFO L226 Difference]: Without dead ends: 149 [2021-07-13 19:15:52,046 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:52,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-13 19:15:52,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 116. [2021-07-13 19:15:52,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:52,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 241 transitions. [2021-07-13 19:15:52,069 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 241 transitions. Word has length 18 [2021-07-13 19:15:52,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:52,069 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 241 transitions. [2021-07-13 19:15:52,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:52,069 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 241 transitions. [2021-07-13 19:15:52,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:52,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:52,070 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:52,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-07-13 19:15:52,070 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:52,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:52,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1370649044, now seen corresponding path program 4 times [2021-07-13 19:15:52,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:52,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18009129] [2021-07-13 19:15:52,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:52,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:52,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:52,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18009129] [2021-07-13 19:15:52,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18009129] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:52,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:52,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:52,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980653952] [2021-07-13 19:15:52,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:52,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:52,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:52,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:52,131 INFO L87 Difference]: Start difference. First operand 116 states and 241 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:52,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:52,235 INFO L93 Difference]: Finished difference Result 182 states and 359 transitions. [2021-07-13 19:15:52,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:15:52,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:52,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:52,236 INFO L225 Difference]: With dead ends: 182 [2021-07-13 19:15:52,236 INFO L226 Difference]: Without dead ends: 161 [2021-07-13 19:15:52,237 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:52,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-13 19:15:52,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2021-07-13 19:15:52,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.105691056910569) internal successors, (259), 123 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:52,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 259 transitions. [2021-07-13 19:15:52,239 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 259 transitions. Word has length 18 [2021-07-13 19:15:52,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:52,239 INFO L482 AbstractCegarLoop]: Abstraction has 124 states and 259 transitions. [2021-07-13 19:15:52,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:52,239 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 259 transitions. [2021-07-13 19:15:52,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:52,239 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:52,240 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:52,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-07-13 19:15:52,240 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:52,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:52,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1695120054, now seen corresponding path program 5 times [2021-07-13 19:15:52,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:52,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049387134] [2021-07-13 19:15:52,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:52,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:52,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049387134] [2021-07-13 19:15:52,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049387134] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:52,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:52,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:52,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650015260] [2021-07-13 19:15:52,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:52,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:52,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:52,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:52,292 INFO L87 Difference]: Start difference. First operand 124 states and 259 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:52,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:52,363 INFO L93 Difference]: Finished difference Result 182 states and 358 transitions. [2021-07-13 19:15:52,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:15:52,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:52,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:52,364 INFO L225 Difference]: With dead ends: 182 [2021-07-13 19:15:52,364 INFO L226 Difference]: Without dead ends: 173 [2021-07-13 19:15:52,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:52,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-07-13 19:15:52,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2021-07-13 19:15:52,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.104) internal successors, (263), 125 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 263 transitions. [2021-07-13 19:15:52,368 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 263 transitions. Word has length 18 [2021-07-13 19:15:52,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:52,368 INFO L482 AbstractCegarLoop]: Abstraction has 126 states and 263 transitions. [2021-07-13 19:15:52,368 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 263 transitions. [2021-07-13 19:15:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:52,368 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:52,368 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:52,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-07-13 19:15:52,368 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:52,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:52,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1706483244, now seen corresponding path program 6 times [2021-07-13 19:15:52,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:52,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937479175] [2021-07-13 19:15:52,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:52,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:52,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:52,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937479175] [2021-07-13 19:15:52,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937479175] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:52,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:52,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:52,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563417812] [2021-07-13 19:15:52,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:52,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:52,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:52,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:52,426 INFO L87 Difference]: Start difference. First operand 126 states and 263 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:52,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:52,496 INFO L93 Difference]: Finished difference Result 171 states and 344 transitions. [2021-07-13 19:15:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:15:52,496 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:52,497 INFO L225 Difference]: With dead ends: 171 [2021-07-13 19:15:52,497 INFO L226 Difference]: Without dead ends: 148 [2021-07-13 19:15:52,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:52,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-13 19:15:52,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 102. [2021-07-13 19:15:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:52,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 207 transitions. [2021-07-13 19:15:52,499 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 207 transitions. Word has length 18 [2021-07-13 19:15:52,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:52,499 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 207 transitions. [2021-07-13 19:15:52,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:52,499 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 207 transitions. [2021-07-13 19:15:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:52,499 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:52,499 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:52,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-07-13 19:15:52,500 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:52,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:52,500 INFO L82 PathProgramCache]: Analyzing trace with hash -493733101, now seen corresponding path program 8 times [2021-07-13 19:15:52,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:52,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112427950] [2021-07-13 19:15:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:52,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:52,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:52,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112427950] [2021-07-13 19:15:52,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112427950] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:52,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:52,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:52,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769741012] [2021-07-13 19:15:52,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:52,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:52,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:52,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:52,565 INFO L87 Difference]: Start difference. First operand 102 states and 207 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:52,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:52,699 INFO L93 Difference]: Finished difference Result 166 states and 313 transitions. [2021-07-13 19:15:52,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:15:52,701 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:52,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:52,702 INFO L225 Difference]: With dead ends: 166 [2021-07-13 19:15:52,702 INFO L226 Difference]: Without dead ends: 145 [2021-07-13 19:15:52,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:52,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-13 19:15:52,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-07-13 19:15:52,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.019047619047619) internal successors, (212), 105 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:52,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 212 transitions. [2021-07-13 19:15:52,704 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 212 transitions. Word has length 18 [2021-07-13 19:15:52,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:52,704 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 212 transitions. [2021-07-13 19:15:52,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:52,704 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 212 transitions. [2021-07-13 19:15:52,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:52,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:52,705 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:52,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-07-13 19:15:52,705 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:52,705 INFO L82 PathProgramCache]: Analyzing trace with hash -169262091, now seen corresponding path program 9 times [2021-07-13 19:15:52,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:52,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742999938] [2021-07-13 19:15:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:52,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:52,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:52,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742999938] [2021-07-13 19:15:52,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742999938] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:52,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:52,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:52,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999786276] [2021-07-13 19:15:52,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:52,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:52,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:52,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:52,770 INFO L87 Difference]: Start difference. First operand 106 states and 212 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:52,910 INFO L93 Difference]: Finished difference Result 166 states and 310 transitions. [2021-07-13 19:15:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:15:52,911 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:52,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:52,911 INFO L225 Difference]: With dead ends: 166 [2021-07-13 19:15:52,911 INFO L226 Difference]: Without dead ends: 157 [2021-07-13 19:15:52,913 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:52,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-13 19:15:52,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 107. [2021-07-13 19:15:52,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.009433962264151) internal successors, (213), 106 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:52,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 213 transitions. [2021-07-13 19:15:52,916 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 213 transitions. Word has length 18 [2021-07-13 19:15:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:52,916 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 213 transitions. [2021-07-13 19:15:52,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:52,916 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 213 transitions. [2021-07-13 19:15:52,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:52,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:52,916 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:52,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-07-13 19:15:52,917 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:52,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:52,917 INFO L82 PathProgramCache]: Analyzing trace with hash 724101907, now seen corresponding path program 10 times [2021-07-13 19:15:52,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:52,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562323055] [2021-07-13 19:15:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:52,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:52,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562323055] [2021-07-13 19:15:52,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562323055] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:52,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:52,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:52,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042703145] [2021-07-13 19:15:52,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:52,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:52,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:52,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:52,986 INFO L87 Difference]: Start difference. First operand 107 states and 213 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:53,116 INFO L93 Difference]: Finished difference Result 155 states and 296 transitions. [2021-07-13 19:15:53,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:15:53,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:53,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:53,117 INFO L225 Difference]: With dead ends: 155 [2021-07-13 19:15:53,117 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 19:15:53,118 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 120.2ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:15:53,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 19:15:53,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2021-07-13 19:15:53,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.064935064935065) internal successors, (159), 77 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 159 transitions. [2021-07-13 19:15:53,121 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 159 transitions. Word has length 18 [2021-07-13 19:15:53,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:53,121 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 159 transitions. [2021-07-13 19:15:53,121 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,121 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 159 transitions. [2021-07-13 19:15:53,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:53,122 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:53,122 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:53,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-07-13 19:15:53,122 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:53,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:53,122 INFO L82 PathProgramCache]: Analyzing trace with hash 283747689, now seen corresponding path program 11 times [2021-07-13 19:15:53,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:53,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2775745] [2021-07-13 19:15:53,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:53,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:53,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2775745] [2021-07-13 19:15:53,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2775745] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:53,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:53,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:53,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597405513] [2021-07-13 19:15:53,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:53,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:53,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:53,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:53,186 INFO L87 Difference]: Start difference. First operand 78 states and 159 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:53,301 INFO L93 Difference]: Finished difference Result 110 states and 216 transitions. [2021-07-13 19:15:53,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:15:53,302 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:53,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:53,302 INFO L225 Difference]: With dead ends: 110 [2021-07-13 19:15:53,302 INFO L226 Difference]: Without dead ends: 82 [2021-07-13 19:15:53,302 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:53,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-07-13 19:15:53,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-07-13 19:15:53,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.9846153846153847) internal successors, (129), 65 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 129 transitions. [2021-07-13 19:15:53,304 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 129 transitions. Word has length 18 [2021-07-13 19:15:53,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:53,304 INFO L482 AbstractCegarLoop]: Abstraction has 66 states and 129 transitions. [2021-07-13 19:15:53,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,304 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 129 transitions. [2021-07-13 19:15:53,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:53,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:53,304 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:53,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-07-13 19:15:53,304 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:53,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:53,305 INFO L82 PathProgramCache]: Analyzing trace with hash -386519237, now seen corresponding path program 12 times [2021-07-13 19:15:53,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:53,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804812024] [2021-07-13 19:15:53,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:53,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:53,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:53,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804812024] [2021-07-13 19:15:53,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804812024] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:53,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:53,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:53,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624209630] [2021-07-13 19:15:53,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:53,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:53,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:53,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:53,355 INFO L87 Difference]: Start difference. First operand 66 states and 129 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:53,446 INFO L93 Difference]: Finished difference Result 116 states and 211 transitions. [2021-07-13 19:15:53,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:15:53,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:53,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:53,447 INFO L225 Difference]: With dead ends: 116 [2021-07-13 19:15:53,447 INFO L226 Difference]: Without dead ends: 103 [2021-07-13 19:15:53,447 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:53,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-07-13 19:15:53,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2021-07-13 19:15:53,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0) internal successors, (156), 78 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 156 transitions. [2021-07-13 19:15:53,449 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 156 transitions. Word has length 18 [2021-07-13 19:15:53,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:53,449 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 156 transitions. [2021-07-13 19:15:53,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,449 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 156 transitions. [2021-07-13 19:15:53,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:53,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:53,449 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:53,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-07-13 19:15:53,449 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:53,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:53,449 INFO L82 PathProgramCache]: Analyzing trace with hash 506844761, now seen corresponding path program 13 times [2021-07-13 19:15:53,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:53,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194409849] [2021-07-13 19:15:53,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:53,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:53,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:53,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194409849] [2021-07-13 19:15:53,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194409849] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:53,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:53,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:53,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606792036] [2021-07-13 19:15:53,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:53,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:53,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:53,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:53,513 INFO L87 Difference]: Start difference. First operand 79 states and 156 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:53,612 INFO L93 Difference]: Finished difference Result 101 states and 189 transitions. [2021-07-13 19:15:53,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:15:53,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:53,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:53,612 INFO L225 Difference]: With dead ends: 101 [2021-07-13 19:15:53,612 INFO L226 Difference]: Without dead ends: 70 [2021-07-13 19:15:53,613 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:53,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-07-13 19:15:53,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-07-13 19:15:53,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 119 transitions. [2021-07-13 19:15:53,614 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 119 transitions. Word has length 18 [2021-07-13 19:15:53,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:53,614 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 119 transitions. [2021-07-13 19:15:53,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,614 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 119 transitions. [2021-07-13 19:15:53,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:53,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:53,614 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:53,615 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-07-13 19:15:53,615 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:53,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:53,615 INFO L82 PathProgramCache]: Analyzing trace with hash -670318101, now seen corresponding path program 14 times [2021-07-13 19:15:53,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:53,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244734088] [2021-07-13 19:15:53,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:53,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:53,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:53,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:53,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244734088] [2021-07-13 19:15:53,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244734088] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:53,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:53,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:53,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219348884] [2021-07-13 19:15:53,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:53,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:53,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:53,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:53,671 INFO L87 Difference]: Start difference. First operand 64 states and 119 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:53,789 INFO L93 Difference]: Finished difference Result 112 states and 193 transitions. [2021-07-13 19:15:53,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:15:53,790 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:53,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:53,790 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:15:53,790 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:15:53,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:53,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:15:53,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2021-07-13 19:15:53,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.8507462686567164) internal successors, (124), 67 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 124 transitions. [2021-07-13 19:15:53,793 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 124 transitions. Word has length 18 [2021-07-13 19:15:53,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:53,793 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 124 transitions. [2021-07-13 19:15:53,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,793 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 124 transitions. [2021-07-13 19:15:53,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:53,793 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:53,793 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:53,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-07-13 19:15:53,793 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:53,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:53,794 INFO L82 PathProgramCache]: Analyzing trace with hash -345847091, now seen corresponding path program 15 times [2021-07-13 19:15:53,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:53,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631851050] [2021-07-13 19:15:53,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:53,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:53,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:53,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631851050] [2021-07-13 19:15:53,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631851050] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:53,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:53,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:53,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398048865] [2021-07-13 19:15:53,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:53,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:53,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:53,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:53,854 INFO L87 Difference]: Start difference. First operand 68 states and 124 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:53,959 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2021-07-13 19:15:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:15:53,959 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:53,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:53,960 INFO L225 Difference]: With dead ends: 100 [2021-07-13 19:15:53,960 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:15:53,960 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:53,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:15:53,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2021-07-13 19:15:53,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.838235294117647) internal successors, (125), 68 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 125 transitions. [2021-07-13 19:15:53,968 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 125 transitions. Word has length 18 [2021-07-13 19:15:53,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:53,968 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 125 transitions. [2021-07-13 19:15:53,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:53,968 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 125 transitions. [2021-07-13 19:15:53,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:53,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:53,971 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:53,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-07-13 19:15:53,971 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:53,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:53,972 INFO L82 PathProgramCache]: Analyzing trace with hash 547516907, now seen corresponding path program 16 times [2021-07-13 19:15:53,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:53,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194849523] [2021-07-13 19:15:53,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:54,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:54,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:54,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194849523] [2021-07-13 19:15:54,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194849523] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:54,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:54,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:54,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113952951] [2021-07-13 19:15:54,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:54,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:54,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:54,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:54,036 INFO L87 Difference]: Start difference. First operand 69 states and 125 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:54,152 INFO L93 Difference]: Finished difference Result 89 states and 154 transitions. [2021-07-13 19:15:54,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:15:54,152 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:54,153 INFO L225 Difference]: With dead ends: 89 [2021-07-13 19:15:54,153 INFO L226 Difference]: Without dead ends: 48 [2021-07-13 19:15:54,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:54,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-07-13 19:15:54,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-07-13 19:15:54,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 45 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 75 transitions. [2021-07-13 19:15:54,158 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 75 transitions. Word has length 18 [2021-07-13 19:15:54,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:54,158 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 75 transitions. [2021-07-13 19:15:54,158 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,158 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 75 transitions. [2021-07-13 19:15:54,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:54,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:54,159 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:54,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-07-13 19:15:54,159 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:54,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:54,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1683572320, now seen corresponding path program 7 times [2021-07-13 19:15:54,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:54,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762819048] [2021-07-13 19:15:54,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:54,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:54,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:54,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762819048] [2021-07-13 19:15:54,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762819048] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:54,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:54,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:54,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140483766] [2021-07-13 19:15:54,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:54,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:54,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:54,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:54,203 INFO L87 Difference]: Start difference. First operand 46 states and 75 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:54,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:54,276 INFO L93 Difference]: Finished difference Result 102 states and 161 transitions. [2021-07-13 19:15:54,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:15:54,276 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:54,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:54,276 INFO L225 Difference]: With dead ends: 102 [2021-07-13 19:15:54,276 INFO L226 Difference]: Without dead ends: 79 [2021-07-13 19:15:54,277 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:15:54,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-13 19:15:54,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 47. [2021-07-13 19:15:54,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 46 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 76 transitions. [2021-07-13 19:15:54,278 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 76 transitions. Word has length 18 [2021-07-13 19:15:54,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:54,278 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 76 transitions. [2021-07-13 19:15:54,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:54,278 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 76 transitions. [2021-07-13 19:15:54,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:54,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:54,278 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:54,278 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-07-13 19:15:54,278 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:54,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:54,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1859620800, now seen corresponding path program 8 times [2021-07-13 19:15:54,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:54,279 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494667576] [2021-07-13 19:15:54,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:54,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:54,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:54,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494667576] [2021-07-13 19:15:54,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494667576] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:54,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:54,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:54,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628347726] [2021-07-13 19:15:54,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:54,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:54,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:54,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:54,320 INFO L87 Difference]: Start difference. First operand 47 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:54,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:54,383 INFO L93 Difference]: Finished difference Result 88 states and 137 transitions. [2021-07-13 19:15:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:15:54,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:54,384 INFO L225 Difference]: With dead ends: 88 [2021-07-13 19:15:54,384 INFO L226 Difference]: Without dead ends: 67 [2021-07-13 19:15:54,384 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:54,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-07-13 19:15:54,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2021-07-13 19:15:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.62) internal successors, (81), 50 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 81 transitions. [2021-07-13 19:15:54,385 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 81 transitions. Word has length 18 [2021-07-13 19:15:54,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:54,385 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 81 transitions. [2021-07-13 19:15:54,385 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:54,385 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 81 transitions. [2021-07-13 19:15:54,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:54,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:54,386 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:54,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-07-13 19:15:54,386 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:54,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:54,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1478454498, now seen corresponding path program 9 times [2021-07-13 19:15:54,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:54,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945245367] [2021-07-13 19:15:54,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:54,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:54,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:54,421 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:54,421 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945245367] [2021-07-13 19:15:54,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945245367] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:54,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:54,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:54,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25027321] [2021-07-13 19:15:54,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:54,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:54,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:54,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:54,423 INFO L87 Difference]: Start difference. First operand 51 states and 81 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:54,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:54,485 INFO L93 Difference]: Finished difference Result 78 states and 116 transitions. [2021-07-13 19:15:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:15:54,486 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:54,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:54,487 INFO L225 Difference]: With dead ends: 78 [2021-07-13 19:15:54,487 INFO L226 Difference]: Without dead ends: 69 [2021-07-13 19:15:54,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:54,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-07-13 19:15:54,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-07-13 19:15:54,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.607843137254902) internal successors, (82), 51 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 82 transitions. [2021-07-13 19:15:54,502 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 82 transitions. Word has length 18 [2021-07-13 19:15:54,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:54,504 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 82 transitions. [2021-07-13 19:15:54,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 82 transitions. [2021-07-13 19:15:54,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:54,504 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:54,504 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:54,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-07-13 19:15:54,504 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:54,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:54,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1923148800, now seen corresponding path program 10 times [2021-07-13 19:15:54,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:54,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597669910] [2021-07-13 19:15:54,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:54,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:54,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:54,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597669910] [2021-07-13 19:15:54,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597669910] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:54,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:54,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-07-13 19:15:54,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647274818] [2021-07-13 19:15:54,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:15:54,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:54,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:15:54,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:15:54,542 INFO L87 Difference]: Start difference. First operand 52 states and 82 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:54,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:54,602 INFO L93 Difference]: Finished difference Result 67 states and 102 transitions. [2021-07-13 19:15:54,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:15:54,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:54,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:54,602 INFO L225 Difference]: With dead ends: 67 [2021-07-13 19:15:54,602 INFO L226 Difference]: Without dead ends: 39 [2021-07-13 19:15:54,602 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:15:54,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-07-13 19:15:54,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-07-13 19:15:54,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 56 transitions. [2021-07-13 19:15:54,603 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 56 transitions. Word has length 18 [2021-07-13 19:15:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:54,603 INFO L482 AbstractCegarLoop]: Abstraction has 37 states and 56 transitions. [2021-07-13 19:15:54,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2021-07-13 19:15:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 56 transitions. [2021-07-13 19:15:54,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:54,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:54,604 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:54,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-07-13 19:15:54,605 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:54,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:54,605 INFO L82 PathProgramCache]: Analyzing trace with hash -974982143, now seen corresponding path program 17 times [2021-07-13 19:15:54,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:54,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033425114] [2021-07-13 19:15:54,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:54,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:54,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:54,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033425114] [2021-07-13 19:15:54,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033425114] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:54,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:54,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:54,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002659483] [2021-07-13 19:15:54,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:54,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:54,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:54,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:54,666 INFO L87 Difference]: Start difference. First operand 37 states and 56 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:54,785 INFO L93 Difference]: Finished difference Result 64 states and 95 transitions. [2021-07-13 19:15:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:15:54,786 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:54,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:54,786 INFO L225 Difference]: With dead ends: 64 [2021-07-13 19:15:54,786 INFO L226 Difference]: Without dead ends: 41 [2021-07-13 19:15:54,786 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:15:54,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-07-13 19:15:54,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2021-07-13 19:15:54,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 34 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 52 transitions. [2021-07-13 19:15:54,787 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 52 transitions. Word has length 18 [2021-07-13 19:15:54,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:54,787 INFO L482 AbstractCegarLoop]: Abstraction has 35 states and 52 transitions. [2021-07-13 19:15:54,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,787 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 52 transitions. [2021-07-13 19:15:54,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:54,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:54,787 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:54,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-07-13 19:15:54,788 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:54,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:54,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1726756319, now seen corresponding path program 18 times [2021-07-13 19:15:54,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:54,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433423751] [2021-07-13 19:15:54,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:54,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:54,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433423751] [2021-07-13 19:15:54,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433423751] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:54,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:54,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:54,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295378018] [2021-07-13 19:15:54,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:54,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:54,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:54,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:54,836 INFO L87 Difference]: Start difference. First operand 35 states and 52 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:54,916 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2021-07-13 19:15:54,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:15:54,916 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:54,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:54,916 INFO L225 Difference]: With dead ends: 50 [2021-07-13 19:15:54,917 INFO L226 Difference]: Without dead ends: 29 [2021-07-13 19:15:54,917 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:54,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-07-13 19:15:54,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2021-07-13 19:15:54,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-07-13 19:15:54,917 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 18 [2021-07-13 19:15:54,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:54,918 INFO L482 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-07-13 19:15:54,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:54,918 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2021-07-13 19:15:54,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:54,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:54,918 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:54,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-07-13 19:15:54,918 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:54,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:54,918 INFO L82 PathProgramCache]: Analyzing trace with hash -2107922621, now seen corresponding path program 19 times [2021-07-13 19:15:54,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:54,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866148124] [2021-07-13 19:15:54,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:54,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:54,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866148124] [2021-07-13 19:15:54,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866148124] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:54,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:54,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:54,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578522094] [2021-07-13 19:15:54,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:54,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:54,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:54,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:54,960 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:55,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:55,039 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-07-13 19:15:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:15:55,039 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:55,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:55,039 INFO L225 Difference]: With dead ends: 38 [2021-07-13 19:15:55,039 INFO L226 Difference]: Without dead ends: 29 [2021-07-13 19:15:55,039 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.5ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:55,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-07-13 19:15:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2021-07-13 19:15:55,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:55,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-07-13 19:15:55,040 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 18 [2021-07-13 19:15:55,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:55,040 INFO L482 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-07-13 19:15:55,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-07-13 19:15:55,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:15:55,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:55,041 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:55,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-07-13 19:15:55,041 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:55,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:55,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1214558623, now seen corresponding path program 20 times [2021-07-13 19:15:55,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:55,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054278336] [2021-07-13 19:15:55,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:55,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:55,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054278336] [2021-07-13 19:15:55,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054278336] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:15:55,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:15:55,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-07-13 19:15:55,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688966380] [2021-07-13 19:15:55,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:15:55,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:55,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:15:55,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:15:55,084 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:55,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:55,158 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-07-13 19:15:55,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:15:55,158 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:15:55,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:55,158 INFO L225 Difference]: With dead ends: 27 [2021-07-13 19:15:55,159 INFO L226 Difference]: Without dead ends: 0 [2021-07-13 19:15:55,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:55,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-07-13 19:15:55,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-07-13 19:15:55,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:55,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-07-13 19:15:55,159 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-07-13 19:15:55,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:55,159 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-07-13 19:15:55,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:55,159 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-07-13 19:15:55,159 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-07-13 19:15:55,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-07-13 19:15:55,161 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-07-13 19:15:55,163 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 07:15:55 BasicIcfg [2021-07-13 19:15:55,163 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-07-13 19:15:55,163 INFO L168 Benchmark]: Toolchain (without parser) took 7413.48 ms. Allocated memory was 211.8 MB in the beginning and 351.3 MB in the end (delta: 139.5 MB). Free memory was 191.5 MB in the beginning and 174.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 157.3 MB. Max. memory is 8.0 GB. [2021-07-13 19:15:55,163 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 211.8 MB. Free memory is still 192.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:15:55,164 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.10 ms. Allocated memory is still 211.8 MB. Free memory was 191.4 MB in the beginning and 190.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-07-13 19:15:55,164 INFO L168 Benchmark]: Boogie Preprocessor took 11.13 ms. Allocated memory is still 211.8 MB. Free memory was 190.0 MB in the beginning and 189.1 MB in the end (delta: 893.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-07-13 19:15:55,164 INFO L168 Benchmark]: RCFGBuilder took 162.71 ms. Allocated memory is still 211.8 MB. Free memory was 189.0 MB in the beginning and 178.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-07-13 19:15:55,164 INFO L168 Benchmark]: TraceAbstraction took 7217.23 ms. Allocated memory was 211.8 MB in the beginning and 351.3 MB in the end (delta: 139.5 MB). Free memory was 178.1 MB in the beginning and 174.7 MB in the end (delta: 3.4 MB). Peak memory consumption was 143.7 MB. Max. memory is 8.0 GB. [2021-07-13 19:15:55,164 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09 ms. Allocated memory is still 211.8 MB. Free memory is still 192.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 18.10 ms. Allocated memory is still 211.8 MB. Free memory was 191.4 MB in the beginning and 190.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 11.13 ms. Allocated memory is still 211.8 MB. Free memory was 190.0 MB in the beginning and 189.1 MB in the end (delta: 893.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 162.71 ms. Allocated memory is still 211.8 MB. Free memory was 189.0 MB in the beginning and 178.6 MB in the end (delta: 10.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7217.23 ms. Allocated memory was 211.8 MB in the beginning and 351.3 MB in the end (delta: 139.5 MB). Free memory was 178.1 MB in the beginning and 174.7 MB in the end (delta: 3.4 MB). Peak memory consumption was 143.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 69]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 43 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7145.2ms, OverallIterations: 48, TraceHistogramMax: 1, EmptinessCheckTime: 31.3ms, AutomataDifference: 4296.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 20.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2186 SDtfs, 2998 SDslu, 6783 SDs, 0 SdLazy, 2182 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1051.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 562 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 461 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 3921.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=27, InterpolantAutomatonStates: 359, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 208.9ms AutomataMinimizationTime, 48 MinimizatonAttempts, 1618 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 28.8ms SsaConstructionTime, 108.9ms SatisfiabilityAnalysisTime, 2214.3ms InterpolantComputationTime, 861 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 813 ConstructedInterpolants, 0 QuantifiedInterpolants, 5484 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 48 InterpolantComputations, 48 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...