/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 02:18:20,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 02:18:20,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 02:18:20,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-04-15 02:18:20,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-04-15 02:18:20,440 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-04-15 02:18:20,441 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-04-15 02:18:20,443 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-04-15 02:18:20,445 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-04-15 02:18:20,446 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-04-15 02:18:20,447 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-04-15 02:18:20,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-04-15 02:18:20,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-04-15 02:18:20,449 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-04-15 02:18:20,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-04-15 02:18:20,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-04-15 02:18:20,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-04-15 02:18:20,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-04-15 02:18:20,456 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-04-15 02:18:20,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-04-15 02:18:20,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-04-15 02:18:20,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-04-15 02:18:20,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-04-15 02:18:20,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-04-15 02:18:20,466 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-04-15 02:18:20,467 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-04-15 02:18:20,467 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-04-15 02:18:20,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-04-15 02:18:20,468 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-04-15 02:18:20,469 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-04-15 02:18:20,470 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-04-15 02:18:20,471 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-04-15 02:18:20,471 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-04-15 02:18:20,472 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-04-15 02:18:20,473 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-04-15 02:18:20,474 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-04-15 02:18:20,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-04-15 02:18:20,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-04-15 02:18:20,475 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-04-15 02:18:20,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-04-15 02:18:20,476 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-04-15 02:18:20,477 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 [2021-04-15 02:18:20,501 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 02:18:20,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 02:18:20,502 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 02:18:20,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 02:18:20,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 02:18:20,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 02:18:20,504 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 02:18:20,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 02:18:20,504 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 02:18:20,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 02:18:20,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 02:18:20,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 02:18:20,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 02:18:20,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 02:18:20,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 02:18:20,505 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 02:18:20,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 02:18:20,506 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 02:18:20,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 02:18:20,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 02:18:20,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 02:18:20,506 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 02:18:20,507 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 02:18:20,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 02:18:20,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 02:18:20,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 02:18:20,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 02:18:20,508 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 02:18:20,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 02:18:20,508 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 02:18:20,508 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 02:18:20,508 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 02:18:20,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 02:18:20,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 02:18:20,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 02:18:20,858 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 02:18:20,859 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 02:18:20,861 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl [2021-04-15 02:18:20,861 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl' [2021-04-15 02:18:20,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 02:18:20,905 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 02:18:20,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 02:18:20,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 02:18:20,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 02:18:20,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:20" (1/1) ... [2021-04-15 02:18:20,922 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:20" (1/1) ... [2021-04-15 02:18:20,932 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 02:18:20,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 02:18:20,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 02:18:20,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 02:18:20,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:20" (1/1) ... [2021-04-15 02:18:20,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:20" (1/1) ... [2021-04-15 02:18:20,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:20" (1/1) ... [2021-04-15 02:18:20,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:20" (1/1) ... [2021-04-15 02:18:20,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:20" (1/1) ... [2021-04-15 02:18:20,943 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:20" (1/1) ... [2021-04-15 02:18:20,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:20" (1/1) ... [2021-04-15 02:18:20,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 02:18:20,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 02:18:20,945 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 02:18:20,945 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 02:18:20,946 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 02:18:21,003 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 02:18:21,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 02:18:21,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 02:18:21,003 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 02:18:21,004 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 02:18:21,004 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 02:18:21,004 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 02:18:21,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 02:18:21,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 02:18:21,005 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 02:18:21,191 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 02:18:21,191 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 02:18:21,194 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:18:21 BoogieIcfgContainer [2021-04-15 02:18:21,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 02:18:21,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 02:18:21,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 02:18:21,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 02:18:21,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 02:18:20" (1/2) ... [2021-04-15 02:18:21,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@158fa3d3 and model type security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 02:18:21, skipping insertion in model container [2021-04-15 02:18:21,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 02:18:21" (2/2) ... [2021-04-15 02:18:21,207 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.bpl [2021-04-15 02:18:21,215 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 02:18:21,215 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 02:18:21,219 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 02:18:21,219 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 02:18:21,288 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-04-15 02:18:21,332 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-04-15 02:18:21,358 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 02:18:21,359 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 02:18:21,359 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 02:18:21,359 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 02:18:21,359 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 02:18:21,359 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 02:18:21,359 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 02:18:21,359 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 02:18:21,375 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 28 transitions, 72 flow [2021-04-15 02:18:21,401 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 86 states, 84 states have (on average 2.1904761904761907) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:21,404 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 84 states have (on average 2.1904761904761907) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-04-15 02:18:21,414 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:21,415 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:21,415 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:21,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:21,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1314794576, now seen corresponding path program 1 times [2021-04-15 02:18:21,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:21,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691440081] [2021-04-15 02:18:21,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:21,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691440081] [2021-04-15 02:18:21,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:21,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:18:21,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698055030] [2021-04-15 02:18:21,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 02:18:21,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:21,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 02:18:21,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:18:21,612 INFO L87 Difference]: Start difference. First operand has 86 states, 84 states have (on average 2.1904761904761907) internal successors, (184), 85 states have internal predecessors, (184), 0 states have call successors, (0), 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) [2021-04-15 02:18:21,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:21,662 INFO L93 Difference]: Finished difference Result 131 states and 269 transitions. [2021-04-15 02:18:21,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 02:18:21,665 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 [2021-04-15 02:18:21,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:21,680 INFO L225 Difference]: With dead ends: 131 [2021-04-15 02:18:21,680 INFO L226 Difference]: Without dead ends: 131 [2021-04-15 02:18:21,682 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:18:21,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-04-15 02:18:21,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2021-04-15 02:18:21,733 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) [2021-04-15 02:18:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 201 transitions. [2021-04-15 02:18:21,738 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 201 transitions. Word has length 16 [2021-04-15 02:18:21,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:21,739 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 201 transitions. [2021-04-15 02:18:21,739 INFO L481 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) [2021-04-15 02:18:21,740 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 201 transitions. [2021-04-15 02:18:21,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 02:18:21,742 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:21,743 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:21,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 02:18:21,743 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:21,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:21,748 INFO L82 PathProgramCache]: Analyzing trace with hash 220857976, now seen corresponding path program 1 times [2021-04-15 02:18:21,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:21,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355427594] [2021-04-15 02:18:21,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:21,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355427594] [2021-04-15 02:18:21,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:21,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 02:18:21,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831553134] [2021-04-15 02:18:21,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 02:18:21,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:21,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 02:18:21,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:18:21,798 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) [2021-04-15 02:18:21,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:21,828 INFO L93 Difference]: Finished difference Result 136 states and 278 transitions. [2021-04-15 02:18:21,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 02:18:21,829 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 [2021-04-15 02:18:21,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:21,832 INFO L225 Difference]: With dead ends: 136 [2021-04-15 02:18:21,832 INFO L226 Difference]: Without dead ends: 136 [2021-04-15 02:18:21,833 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 02:18:21,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-04-15 02:18:21,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 103. [2021-04-15 02:18:21,854 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) [2021-04-15 02:18:21,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 222 transitions. [2021-04-15 02:18:21,855 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 222 transitions. Word has length 17 [2021-04-15 02:18:21,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:21,856 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 222 transitions. [2021-04-15 02:18:21,856 INFO L481 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) [2021-04-15 02:18:21,856 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 222 transitions. [2021-04-15 02:18:21,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:21,861 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:21,861 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:21,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-04-15 02:18:21,861 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:21,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:21,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1024512365, now seen corresponding path program 1 times [2021-04-15 02:18:21,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:21,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744617456] [2021-04-15 02:18:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:22,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744617456] [2021-04-15 02:18:22,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:22,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:18:22,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092491397] [2021-04-15 02:18:22,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 02:18:22,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:22,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 02:18:22,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:18:22,044 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) [2021-04-15 02:18:22,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:22,235 INFO L93 Difference]: Finished difference Result 171 states and 344 transitions. [2021-04-15 02:18:22,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:18:22,238 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 [2021-04-15 02:18:22,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:22,239 INFO L225 Difference]: With dead ends: 171 [2021-04-15 02:18:22,240 INFO L226 Difference]: Without dead ends: 161 [2021-04-15 02:18:22,240 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:22,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-04-15 02:18:22,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 118. [2021-04-15 02:18:22,246 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) [2021-04-15 02:18:22,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 252 transitions. [2021-04-15 02:18:22,247 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 252 transitions. Word has length 18 [2021-04-15 02:18:22,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:22,247 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 252 transitions. [2021-04-15 02:18:22,248 INFO L481 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) [2021-04-15 02:18:22,248 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 252 transitions. [2021-04-15 02:18:22,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:22,249 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:22,249 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:22,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 02:18:22,249 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:22,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:22,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1634430802, now seen corresponding path program 1 times [2021-04-15 02:18:22,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:22,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043852890] [2021-04-15 02:18:22,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:22,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043852890] [2021-04-15 02:18:22,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:22,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:22,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586929739] [2021-04-15 02:18:22,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:22,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:22,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:22,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:22,357 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) [2021-04-15 02:18:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:22,593 INFO L93 Difference]: Finished difference Result 189 states and 374 transitions. [2021-04-15 02:18:22,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:22,594 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 [2021-04-15 02:18:22,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:22,595 INFO L225 Difference]: With dead ends: 189 [2021-04-15 02:18:22,595 INFO L226 Difference]: Without dead ends: 156 [2021-04-15 02:18:22,595 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 172.7ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 02:18:22,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-04-15 02:18:22,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 113. [2021-04-15 02:18:22,600 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) [2021-04-15 02:18:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 242 transitions. [2021-04-15 02:18:22,600 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 242 transitions. Word has length 18 [2021-04-15 02:18:22,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:22,601 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 242 transitions. [2021-04-15 02:18:22,601 INFO L481 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) [2021-04-15 02:18:22,601 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 242 transitions. [2021-04-15 02:18:22,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:22,602 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:22,602 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:22,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 02:18:22,602 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:22,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:22,603 INFO L82 PathProgramCache]: Analyzing trace with hash 123697834, now seen corresponding path program 2 times [2021-04-15 02:18:22,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:22,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259229732] [2021-04-15 02:18:22,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:22,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259229732] [2021-04-15 02:18:22,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:22,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:22,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733523908] [2021-04-15 02:18:22,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:22,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:22,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:22,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:22,737 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) [2021-04-15 02:18:22,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:22,870 INFO L93 Difference]: Finished difference Result 217 states and 436 transitions. [2021-04-15 02:18:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:22,871 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 [2021-04-15 02:18:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:22,872 INFO L225 Difference]: With dead ends: 217 [2021-04-15 02:18:22,872 INFO L226 Difference]: Without dead ends: 189 [2021-04-15 02:18:22,877 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:22,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-04-15 02:18:22,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 126. [2021-04-15 02:18:22,893 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) [2021-04-15 02:18:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 272 transitions. [2021-04-15 02:18:22,895 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 272 transitions. Word has length 18 [2021-04-15 02:18:22,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:22,895 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 272 transitions. [2021-04-15 02:18:22,895 INFO L481 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) [2021-04-15 02:18:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 272 transitions. [2021-04-15 02:18:22,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:22,898 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:22,898 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:22,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-04-15 02:18:22,898 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:22,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:22,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1040617061, now seen corresponding path program 2 times [2021-04-15 02:18:22,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:22,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461285175] [2021-04-15 02:18:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:22,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461285175] [2021-04-15 02:18:22,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:22,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:18:22,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973758459] [2021-04-15 02:18:22,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 02:18:22,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:22,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 02:18:22,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:18:22,988 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) [2021-04-15 02:18:23,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:23,073 INFO L93 Difference]: Finished difference Result 208 states and 418 transitions. [2021-04-15 02:18:23,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:18:23,073 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 [2021-04-15 02:18:23,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:23,075 INFO L225 Difference]: With dead ends: 208 [2021-04-15 02:18:23,075 INFO L226 Difference]: Without dead ends: 199 [2021-04-15 02:18:23,075 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:23,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-04-15 02:18:23,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 130. [2021-04-15 02:18:23,086 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) [2021-04-15 02:18:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 283 transitions. [2021-04-15 02:18:23,087 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 283 transitions. Word has length 18 [2021-04-15 02:18:23,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:23,087 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 283 transitions. [2021-04-15 02:18:23,087 INFO L481 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) [2021-04-15 02:18:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 283 transitions. [2021-04-15 02:18:23,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:23,089 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:23,089 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:23,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-15 02:18:23,089 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:23,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:23,091 INFO L82 PathProgramCache]: Analyzing trace with hash -147253063, now seen corresponding path program 3 times [2021-04-15 02:18:23,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:23,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681868849] [2021-04-15 02:18:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:23,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681868849] [2021-04-15 02:18:23,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:23,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:18:23,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245430450] [2021-04-15 02:18:23,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 02:18:23,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:23,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 02:18:23,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:18:23,193 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) [2021-04-15 02:18:23,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:23,274 INFO L93 Difference]: Finished difference Result 200 states and 407 transitions. [2021-04-15 02:18:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:18:23,275 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 [2021-04-15 02:18:23,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:23,277 INFO L225 Difference]: With dead ends: 200 [2021-04-15 02:18:23,277 INFO L226 Difference]: Without dead ends: 186 [2021-04-15 02:18:23,278 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:23,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-04-15 02:18:23,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 123. [2021-04-15 02:18:23,283 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) [2021-04-15 02:18:23,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 268 transitions. [2021-04-15 02:18:23,284 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 268 transitions. Word has length 18 [2021-04-15 02:18:23,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:23,284 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 268 transitions. [2021-04-15 02:18:23,285 INFO L481 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) [2021-04-15 02:18:23,285 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 268 transitions. [2021-04-15 02:18:23,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:23,285 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:23,286 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:23,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-04-15 02:18:23,286 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:23,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:23,287 INFO L82 PathProgramCache]: Analyzing trace with hash -546569092, now seen corresponding path program 3 times [2021-04-15 02:18:23,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:23,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724289115] [2021-04-15 02:18:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:23,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724289115] [2021-04-15 02:18:23,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:23,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:23,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801418702] [2021-04-15 02:18:23,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:23,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:23,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:23,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:23,391 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) [2021-04-15 02:18:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:23,553 INFO L93 Difference]: Finished difference Result 217 states and 431 transitions. [2021-04-15 02:18:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:18:23,553 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 [2021-04-15 02:18:23,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:23,555 INFO L225 Difference]: With dead ends: 217 [2021-04-15 02:18:23,555 INFO L226 Difference]: Without dead ends: 208 [2021-04-15 02:18:23,555 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:23,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-04-15 02:18:23,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 125. [2021-04-15 02:18:23,560 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) [2021-04-15 02:18:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 272 transitions. [2021-04-15 02:18:23,561 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 272 transitions. Word has length 18 [2021-04-15 02:18:23,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:23,562 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 272 transitions. [2021-04-15 02:18:23,562 INFO L481 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) [2021-04-15 02:18:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 272 transitions. [2021-04-15 02:18:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:23,563 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:23,563 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:23,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-04-15 02:18:23,563 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:23,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:23,564 INFO L82 PathProgramCache]: Analyzing trace with hash 346794906, now seen corresponding path program 4 times [2021-04-15 02:18:23,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:23,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728550462] [2021-04-15 02:18:23,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:23,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:23,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:23,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728550462] [2021-04-15 02:18:23,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:23,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:23,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288636572] [2021-04-15 02:18:23,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:23,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:23,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:23,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:23,654 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) [2021-04-15 02:18:23,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:23,815 INFO L93 Difference]: Finished difference Result 210 states and 422 transitions. [2021-04-15 02:18:23,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:18:23,815 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 [2021-04-15 02:18:23,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:23,817 INFO L225 Difference]: With dead ends: 210 [2021-04-15 02:18:23,817 INFO L226 Difference]: Without dead ends: 191 [2021-04-15 02:18:23,817 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:23,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-04-15 02:18:23,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 110. [2021-04-15 02:18:23,822 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) [2021-04-15 02:18:23,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 238 transitions. [2021-04-15 02:18:23,823 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 238 transitions. Word has length 18 [2021-04-15 02:18:23,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:23,823 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 238 transitions. [2021-04-15 02:18:23,823 INFO L481 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) [2021-04-15 02:18:23,823 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 238 transitions. [2021-04-15 02:18:23,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:23,824 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:23,824 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:23,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-04-15 02:18:23,824 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:23,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:23,825 INFO L82 PathProgramCache]: Analyzing trace with hash -62451926, now seen corresponding path program 5 times [2021-04-15 02:18:23,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:23,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854373408] [2021-04-15 02:18:23,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:23,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:23,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:23,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854373408] [2021-04-15 02:18:23,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:23,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:23,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104383974] [2021-04-15 02:18:23,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:23,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:23,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:23,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:23,909 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) [2021-04-15 02:18:24,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:24,010 INFO L93 Difference]: Finished difference Result 164 states and 328 transitions. [2021-04-15 02:18:24,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:24,010 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 [2021-04-15 02:18:24,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:24,011 INFO L225 Difference]: With dead ends: 164 [2021-04-15 02:18:24,011 INFO L226 Difference]: Without dead ends: 136 [2021-04-15 02:18:24,012 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:24,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-04-15 02:18:24,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 110. [2021-04-15 02:18:24,015 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) [2021-04-15 02:18:24,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2021-04-15 02:18:24,016 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 18 [2021-04-15 02:18:24,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:24,017 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2021-04-15 02:18:24,017 INFO L481 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) [2021-04-15 02:18:24,017 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2021-04-15 02:18:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:24,017 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:24,017 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:24,018 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-04-15 02:18:24,018 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:24,018 INFO L82 PathProgramCache]: Analyzing trace with hash -732718852, now seen corresponding path program 6 times [2021-04-15 02:18:24,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:24,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450685691] [2021-04-15 02:18:24,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:24,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450685691] [2021-04-15 02:18:24,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:24,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:24,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141446690] [2021-04-15 02:18:24,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:24,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:24,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:24,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:24,073 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) [2021-04-15 02:18:24,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:24,179 INFO L93 Difference]: Finished difference Result 169 states and 326 transitions. [2021-04-15 02:18:24,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:24,180 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 [2021-04-15 02:18:24,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:24,181 INFO L225 Difference]: With dead ends: 169 [2021-04-15 02:18:24,181 INFO L226 Difference]: Without dead ends: 160 [2021-04-15 02:18:24,181 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:24,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-04-15 02:18:24,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 112. [2021-04-15 02:18:24,184 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) [2021-04-15 02:18:24,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 237 transitions. [2021-04-15 02:18:24,185 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 237 transitions. Word has length 18 [2021-04-15 02:18:24,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:24,185 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 237 transitions. [2021-04-15 02:18:24,185 INFO L481 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) [2021-04-15 02:18:24,185 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 237 transitions. [2021-04-15 02:18:24,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:24,186 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:24,186 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:24,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-04-15 02:18:24,186 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:24,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:24,186 INFO L82 PathProgramCache]: Analyzing trace with hash 160645146, now seen corresponding path program 7 times [2021-04-15 02:18:24,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:24,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038327650] [2021-04-15 02:18:24,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:24,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038327650] [2021-04-15 02:18:24,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:24,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:24,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548748307] [2021-04-15 02:18:24,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:24,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:24,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:24,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:24,240 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) [2021-04-15 02:18:24,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:24,341 INFO L93 Difference]: Finished difference Result 156 states and 307 transitions. [2021-04-15 02:18:24,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:24,342 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 [2021-04-15 02:18:24,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:24,343 INFO L225 Difference]: With dead ends: 156 [2021-04-15 02:18:24,343 INFO L226 Difference]: Without dead ends: 139 [2021-04-15 02:18:24,343 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:24,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-04-15 02:18:24,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 101. [2021-04-15 02:18:24,346 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) [2021-04-15 02:18:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 210 transitions. [2021-04-15 02:18:24,346 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 210 transitions. Word has length 18 [2021-04-15 02:18:24,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:24,346 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 210 transitions. [2021-04-15 02:18:24,347 INFO L481 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) [2021-04-15 02:18:24,347 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 210 transitions. [2021-04-15 02:18:24,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:24,347 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:24,347 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:24,347 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-04-15 02:18:24,347 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:24,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:24,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1835169953, now seen corresponding path program 4 times [2021-04-15 02:18:24,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:24,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073676067] [2021-04-15 02:18:24,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:24,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073676067] [2021-04-15 02:18:24,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:24,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:18:24,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494428481] [2021-04-15 02:18:24,390 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 02:18:24,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:24,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 02:18:24,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:18:24,391 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) [2021-04-15 02:18:24,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:24,453 INFO L93 Difference]: Finished difference Result 156 states and 303 transitions. [2021-04-15 02:18:24,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:18:24,454 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 [2021-04-15 02:18:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:24,455 INFO L225 Difference]: With dead ends: 156 [2021-04-15 02:18:24,455 INFO L226 Difference]: Without dead ends: 147 [2021-04-15 02:18:24,455 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:24,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-04-15 02:18:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2021-04-15 02:18:24,458 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) [2021-04-15 02:18:24,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-04-15 02:18:24,459 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 18 [2021-04-15 02:18:24,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:24,459 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-04-15 02:18:24,459 INFO L481 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) [2021-04-15 02:18:24,459 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-04-15 02:18:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:24,460 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:24,460 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:24,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-04-15 02:18:24,460 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:24,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:24,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1156500989, now seen corresponding path program 5 times [2021-04-15 02:18:24,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:24,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565819673] [2021-04-15 02:18:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:24,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565819673] [2021-04-15 02:18:24,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:24,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:18:24,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680008426] [2021-04-15 02:18:24,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 02:18:24,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:24,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 02:18:24,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:18:24,510 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) [2021-04-15 02:18:24,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:24,584 INFO L93 Difference]: Finished difference Result 175 states and 330 transitions. [2021-04-15 02:18:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:18:24,585 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 [2021-04-15 02:18:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:24,586 INFO L225 Difference]: With dead ends: 175 [2021-04-15 02:18:24,586 INFO L226 Difference]: Without dead ends: 166 [2021-04-15 02:18:24,587 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:24,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-04-15 02:18:24,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 112. [2021-04-15 02:18:24,590 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) [2021-04-15 02:18:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-04-15 02:18:24,590 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 18 [2021-04-15 02:18:24,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:24,591 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-04-15 02:18:24,591 INFO L481 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) [2021-04-15 02:18:24,591 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-04-15 02:18:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:24,591 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:24,591 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:24,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-04-15 02:18:24,592 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:24,592 INFO L82 PathProgramCache]: Analyzing trace with hash 774326845, now seen corresponding path program 6 times [2021-04-15 02:18:24,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:24,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751845634] [2021-04-15 02:18:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:24,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:24,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751845634] [2021-04-15 02:18:24,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:24,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-04-15 02:18:24,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168958686] [2021-04-15 02:18:24,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 02:18:24,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:24,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 02:18:24,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-04-15 02:18:24,663 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) [2021-04-15 02:18:24,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:24,735 INFO L93 Difference]: Finished difference Result 160 states and 308 transitions. [2021-04-15 02:18:24,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 02:18:24,736 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 [2021-04-15 02:18:24,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:24,737 INFO L225 Difference]: With dead ends: 160 [2021-04-15 02:18:24,737 INFO L226 Difference]: Without dead ends: 145 [2021-04-15 02:18:24,737 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 02:18:24,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-04-15 02:18:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 105. [2021-04-15 02:18:24,740 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) [2021-04-15 02:18:24,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 217 transitions. [2021-04-15 02:18:24,741 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 217 transitions. Word has length 18 [2021-04-15 02:18:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:24,741 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 217 transitions. [2021-04-15 02:18:24,741 INFO L481 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) [2021-04-15 02:18:24,741 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 217 transitions. [2021-04-15 02:18:24,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:24,741 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:24,741 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:24,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-04-15 02:18:24,742 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:24,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:24,742 INFO L82 PathProgramCache]: Analyzing trace with hash 498525696, now seen corresponding path program 8 times [2021-04-15 02:18:24,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:24,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609490782] [2021-04-15 02:18:24,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:24,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609490782] [2021-04-15 02:18:24,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:24,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:24,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701877960] [2021-04-15 02:18:24,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:24,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:24,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:24,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:24,795 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) [2021-04-15 02:18:24,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:24,889 INFO L93 Difference]: Finished difference Result 129 states and 257 transitions. [2021-04-15 02:18:24,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:24,889 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 [2021-04-15 02:18:24,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:24,890 INFO L225 Difference]: With dead ends: 129 [2021-04-15 02:18:24,890 INFO L226 Difference]: Without dead ends: 120 [2021-04-15 02:18:24,890 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:24,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-04-15 02:18:24,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2021-04-15 02:18:24,893 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) [2021-04-15 02:18:24,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 206 transitions. [2021-04-15 02:18:24,894 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 206 transitions. Word has length 18 [2021-04-15 02:18:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:24,894 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 206 transitions. [2021-04-15 02:18:24,894 INFO L481 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) [2021-04-15 02:18:24,894 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 206 transitions. [2021-04-15 02:18:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:24,895 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:24,895 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:24,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-04-15 02:18:24,895 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:24,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:24,895 INFO L82 PathProgramCache]: Analyzing trace with hash -804770658, now seen corresponding path program 9 times [2021-04-15 02:18:24,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:24,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687024719] [2021-04-15 02:18:24,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:24,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:24,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687024719] [2021-04-15 02:18:24,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:24,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:24,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168254704] [2021-04-15 02:18:24,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:24,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:24,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:24,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:24,944 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) [2021-04-15 02:18:25,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:25,048 INFO L93 Difference]: Finished difference Result 144 states and 278 transitions. [2021-04-15 02:18:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:25,049 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 [2021-04-15 02:18:25,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:25,052 INFO L225 Difference]: With dead ends: 144 [2021-04-15 02:18:25,053 INFO L226 Difference]: Without dead ends: 135 [2021-04-15 02:18:25,054 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:25,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-04-15 02:18:25,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 98. [2021-04-15 02:18:25,060 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) [2021-04-15 02:18:25,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 202 transitions. [2021-04-15 02:18:25,061 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 202 transitions. Word has length 18 [2021-04-15 02:18:25,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:25,061 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 202 transitions. [2021-04-15 02:18:25,061 INFO L481 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) [2021-04-15 02:18:25,061 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 202 transitions. [2021-04-15 02:18:25,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:25,062 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:25,062 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:25,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-04-15 02:18:25,062 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:25,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:25,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1186944802, now seen corresponding path program 10 times [2021-04-15 02:18:25,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:25,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100829328] [2021-04-15 02:18:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:25,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:25,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:25,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100829328] [2021-04-15 02:18:25,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:25,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:25,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256697202] [2021-04-15 02:18:25,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:25,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:25,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:25,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:25,117 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) [2021-04-15 02:18:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:25,206 INFO L93 Difference]: Finished difference Result 127 states and 253 transitions. [2021-04-15 02:18:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:25,207 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 [2021-04-15 02:18:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:25,209 INFO L225 Difference]: With dead ends: 127 [2021-04-15 02:18:25,209 INFO L226 Difference]: Without dead ends: 116 [2021-04-15 02:18:25,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:25,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-04-15 02:18:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2021-04-15 02:18:25,213 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) [2021-04-15 02:18:25,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 191 transitions. [2021-04-15 02:18:25,214 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 191 transitions. Word has length 18 [2021-04-15 02:18:25,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:25,214 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 191 transitions. [2021-04-15 02:18:25,214 INFO L481 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) [2021-04-15 02:18:25,215 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 191 transitions. [2021-04-15 02:18:25,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:25,215 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:25,215 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:25,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-04-15 02:18:25,215 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:25,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:25,216 INFO L82 PathProgramCache]: Analyzing trace with hash 579579668, now seen corresponding path program 1 times [2021-04-15 02:18:25,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:25,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872864544] [2021-04-15 02:18:25,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:25,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:25,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872864544] [2021-04-15 02:18:25,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:25,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:25,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557917589] [2021-04-15 02:18:25,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:25,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:25,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:25,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:25,274 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) [2021-04-15 02:18:25,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:25,367 INFO L93 Difference]: Finished difference Result 129 states and 259 transitions. [2021-04-15 02:18:25,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:25,368 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 [2021-04-15 02:18:25,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:25,368 INFO L225 Difference]: With dead ends: 129 [2021-04-15 02:18:25,368 INFO L226 Difference]: Without dead ends: 119 [2021-04-15 02:18:25,368 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-04-15 02:18:25,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2021-04-15 02:18:25,371 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) [2021-04-15 02:18:25,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 191 transitions. [2021-04-15 02:18:25,372 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 191 transitions. Word has length 18 [2021-04-15 02:18:25,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:25,372 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 191 transitions. [2021-04-15 02:18:25,372 INFO L481 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) [2021-04-15 02:18:25,372 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 191 transitions. [2021-04-15 02:18:25,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:25,372 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:25,373 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:25,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-04-15 02:18:25,373 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:25,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:25,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1056444461, now seen corresponding path program 1 times [2021-04-15 02:18:25,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:25,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055337708] [2021-04-15 02:18:25,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:25,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:25,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:25,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055337708] [2021-04-15 02:18:25,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:25,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:25,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121580379] [2021-04-15 02:18:25,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:25,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:25,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:25,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:25,429 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) [2021-04-15 02:18:25,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:25,578 INFO L93 Difference]: Finished difference Result 147 states and 289 transitions. [2021-04-15 02:18:25,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:18:25,578 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 [2021-04-15 02:18:25,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:25,579 INFO L225 Difference]: With dead ends: 147 [2021-04-15 02:18:25,579 INFO L226 Difference]: Without dead ends: 114 [2021-04-15 02:18:25,579 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:18:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-04-15 02:18:25,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 88. [2021-04-15 02:18:25,582 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) [2021-04-15 02:18:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 181 transitions. [2021-04-15 02:18:25,583 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 181 transitions. Word has length 18 [2021-04-15 02:18:25,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:25,583 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 181 transitions. [2021-04-15 02:18:25,583 INFO L481 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) [2021-04-15 02:18:25,583 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 181 transitions. [2021-04-15 02:18:25,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:25,583 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:25,583 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:25,583 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-04-15 02:18:25,584 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:25,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:25,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1727789867, now seen corresponding path program 2 times [2021-04-15 02:18:25,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:25,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016927772] [2021-04-15 02:18:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:25,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:25,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016927772] [2021-04-15 02:18:25,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:25,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:25,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28777503] [2021-04-15 02:18:25,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:25,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:25,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:25,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:25,640 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) [2021-04-15 02:18:25,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:25,765 INFO L93 Difference]: Finished difference Result 175 states and 343 transitions. [2021-04-15 02:18:25,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:25,765 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 [2021-04-15 02:18:25,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:25,766 INFO L225 Difference]: With dead ends: 175 [2021-04-15 02:18:25,766 INFO L226 Difference]: Without dead ends: 147 [2021-04-15 02:18:25,766 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:25,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-04-15 02:18:25,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 110. [2021-04-15 02:18:25,769 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) [2021-04-15 02:18:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 226 transitions. [2021-04-15 02:18:25,770 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 226 transitions. Word has length 18 [2021-04-15 02:18:25,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:25,770 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 226 transitions. [2021-04-15 02:18:25,770 INFO L481 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) [2021-04-15 02:18:25,770 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 226 transitions. [2021-04-15 02:18:25,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:25,771 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:25,771 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:25,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-04-15 02:18:25,771 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:25,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:25,772 INFO L82 PathProgramCache]: Analyzing trace with hash 563474972, now seen corresponding path program 2 times [2021-04-15 02:18:25,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:25,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983987931] [2021-04-15 02:18:25,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:25,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:25,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983987931] [2021-04-15 02:18:25,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:25,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:25,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852236343] [2021-04-15 02:18:25,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:25,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:25,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:25,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:25,819 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) [2021-04-15 02:18:25,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:25,905 INFO L93 Difference]: Finished difference Result 172 states and 336 transitions. [2021-04-15 02:18:25,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:25,906 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 [2021-04-15 02:18:25,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:25,907 INFO L225 Difference]: With dead ends: 172 [2021-04-15 02:18:25,907 INFO L226 Difference]: Without dead ends: 159 [2021-04-15 02:18:25,907 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:25,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-04-15 02:18:25,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 120. [2021-04-15 02:18:25,910 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) [2021-04-15 02:18:25,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-04-15 02:18:25,910 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 18 [2021-04-15 02:18:25,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:25,911 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-04-15 02:18:25,911 INFO L481 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) [2021-04-15 02:18:25,911 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-04-15 02:18:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:25,911 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:25,911 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:25,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-04-15 02:18:25,912 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:25,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:25,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1456838970, now seen corresponding path program 3 times [2021-04-15 02:18:25,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:25,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180613820] [2021-04-15 02:18:25,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:25,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180613820] [2021-04-15 02:18:25,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:25,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:25,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368165727] [2021-04-15 02:18:25,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:25,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:25,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:25,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:25,958 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) [2021-04-15 02:18:26,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:26,050 INFO L93 Difference]: Finished difference Result 160 states and 319 transitions. [2021-04-15 02:18:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:26,050 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 [2021-04-15 02:18:26,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:26,051 INFO L225 Difference]: With dead ends: 160 [2021-04-15 02:18:26,051 INFO L226 Difference]: Without dead ends: 144 [2021-04-15 02:18:26,052 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 86.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:26,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-04-15 02:18:26,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 108. [2021-04-15 02:18:26,054 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) [2021-04-15 02:18:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 222 transitions. [2021-04-15 02:18:26,055 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 222 transitions. Word has length 18 [2021-04-15 02:18:26,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:26,055 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 222 transitions. [2021-04-15 02:18:26,055 INFO L481 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) [2021-04-15 02:18:26,055 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 222 transitions. [2021-04-15 02:18:26,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:26,055 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:26,056 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:26,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-04-15 02:18:26,056 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:26,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:26,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1057522941, now seen corresponding path program 3 times [2021-04-15 02:18:26,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:26,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204066800] [2021-04-15 02:18:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:26,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204066800] [2021-04-15 02:18:26,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:26,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:26,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273327858] [2021-04-15 02:18:26,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:26,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:26,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:26,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:26,119 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) [2021-04-15 02:18:26,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:26,263 INFO L93 Difference]: Finished difference Result 166 states and 316 transitions. [2021-04-15 02:18:26,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:18:26,263 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 [2021-04-15 02:18:26,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:26,264 INFO L225 Difference]: With dead ends: 166 [2021-04-15 02:18:26,264 INFO L226 Difference]: Without dead ends: 153 [2021-04-15 02:18:26,265 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:18:26,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-04-15 02:18:26,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 111. [2021-04-15 02:18:26,268 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) [2021-04-15 02:18:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-04-15 02:18:26,268 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 18 [2021-04-15 02:18:26,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:26,268 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-04-15 02:18:26,269 INFO L481 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) [2021-04-15 02:18:26,269 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-04-15 02:18:26,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:26,269 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:26,269 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:26,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-04-15 02:18:26,269 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:26,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:26,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1950886939, now seen corresponding path program 4 times [2021-04-15 02:18:26,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:26,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476874101] [2021-04-15 02:18:26,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:26,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:26,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476874101] [2021-04-15 02:18:26,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:26,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:26,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352511300] [2021-04-15 02:18:26,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:26,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:26,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:26,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:26,325 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) [2021-04-15 02:18:26,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:26,486 INFO L93 Difference]: Finished difference Result 157 states and 304 transitions. [2021-04-15 02:18:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:18:26,487 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 [2021-04-15 02:18:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:26,488 INFO L225 Difference]: With dead ends: 157 [2021-04-15 02:18:26,488 INFO L226 Difference]: Without dead ends: 120 [2021-04-15 02:18:26,488 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:18:26,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-04-15 02:18:26,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 90. [2021-04-15 02:18:26,497 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) [2021-04-15 02:18:26,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 185 transitions. [2021-04-15 02:18:26,498 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 185 transitions. Word has length 18 [2021-04-15 02:18:26,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:26,498 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 185 transitions. [2021-04-15 02:18:26,498 INFO L481 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) [2021-04-15 02:18:26,498 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 185 transitions. [2021-04-15 02:18:26,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:26,499 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:26,499 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:26,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-04-15 02:18:26,499 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:26,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:26,499 INFO L82 PathProgramCache]: Analyzing trace with hash 460332689, now seen corresponding path program 5 times [2021-04-15 02:18:26,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:26,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425815772] [2021-04-15 02:18:26,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:26,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:26,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425815772] [2021-04-15 02:18:26,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:26,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:26,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950604408] [2021-04-15 02:18:26,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:26,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:26,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:26,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:26,566 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) [2021-04-15 02:18:26,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:26,690 INFO L93 Difference]: Finished difference Result 189 states and 381 transitions. [2021-04-15 02:18:26,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:26,691 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 [2021-04-15 02:18:26,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:26,692 INFO L225 Difference]: With dead ends: 189 [2021-04-15 02:18:26,692 INFO L226 Difference]: Without dead ends: 161 [2021-04-15 02:18:26,692 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:26,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-04-15 02:18:26,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 122. [2021-04-15 02:18:26,697 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) [2021-04-15 02:18:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 261 transitions. [2021-04-15 02:18:26,697 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 261 transitions. Word has length 18 [2021-04-15 02:18:26,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:26,697 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 261 transitions. [2021-04-15 02:18:26,697 INFO L481 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) [2021-04-15 02:18:26,697 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 261 transitions. [2021-04-15 02:18:26,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:26,699 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:26,699 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:26,699 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-04-15 02:18:26,699 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:26,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:26,699 INFO L82 PathProgramCache]: Analyzing trace with hash -209934237, now seen corresponding path program 6 times [2021-04-15 02:18:26,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:26,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046199405] [2021-04-15 02:18:26,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:26,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:26,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:26,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046199405] [2021-04-15 02:18:26,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:26,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:26,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592793082] [2021-04-15 02:18:26,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:26,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:26,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:26,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:26,777 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) [2021-04-15 02:18:26,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:26,906 INFO L93 Difference]: Finished difference Result 195 states and 376 transitions. [2021-04-15 02:18:26,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:26,907 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 [2021-04-15 02:18:26,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:26,908 INFO L225 Difference]: With dead ends: 195 [2021-04-15 02:18:26,908 INFO L226 Difference]: Without dead ends: 182 [2021-04-15 02:18:26,908 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:26,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-04-15 02:18:26,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 131. [2021-04-15 02:18:26,913 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) [2021-04-15 02:18:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 278 transitions. [2021-04-15 02:18:26,914 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 278 transitions. Word has length 18 [2021-04-15 02:18:26,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:26,914 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 278 transitions. [2021-04-15 02:18:26,914 INFO L481 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) [2021-04-15 02:18:26,914 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 278 transitions. [2021-04-15 02:18:26,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:26,915 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:26,915 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:26,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-04-15 02:18:26,915 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash 683429761, now seen corresponding path program 7 times [2021-04-15 02:18:26,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:26,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654121474] [2021-04-15 02:18:26,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:26,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654121474] [2021-04-15 02:18:26,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:26,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:26,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980301571] [2021-04-15 02:18:26,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:26,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:26,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:26,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:26,975 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) [2021-04-15 02:18:27,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:27,100 INFO L93 Difference]: Finished difference Result 180 states and 354 transitions. [2021-04-15 02:18:27,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:27,101 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 [2021-04-15 02:18:27,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:27,101 INFO L225 Difference]: With dead ends: 180 [2021-04-15 02:18:27,101 INFO L226 Difference]: Without dead ends: 149 [2021-04-15 02:18:27,102 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:27,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-04-15 02:18:27,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 116. [2021-04-15 02:18:27,104 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) [2021-04-15 02:18:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 241 transitions. [2021-04-15 02:18:27,105 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 241 transitions. Word has length 18 [2021-04-15 02:18:27,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:27,105 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 241 transitions. [2021-04-15 02:18:27,105 INFO L481 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) [2021-04-15 02:18:27,105 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 241 transitions. [2021-04-15 02:18:27,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:27,106 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:27,106 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:27,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-04-15 02:18:27,106 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:27,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:27,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1370649044, now seen corresponding path program 4 times [2021-04-15 02:18:27,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:27,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702449716] [2021-04-15 02:18:27,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:27,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702449716] [2021-04-15 02:18:27,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:27,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:27,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799082578] [2021-04-15 02:18:27,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:27,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:27,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:27,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:27,163 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) [2021-04-15 02:18:27,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:27,265 INFO L93 Difference]: Finished difference Result 182 states and 359 transitions. [2021-04-15 02:18:27,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:27,266 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 [2021-04-15 02:18:27,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:27,267 INFO L225 Difference]: With dead ends: 182 [2021-04-15 02:18:27,267 INFO L226 Difference]: Without dead ends: 161 [2021-04-15 02:18:27,268 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:27,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-04-15 02:18:27,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 124. [2021-04-15 02:18:27,272 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) [2021-04-15 02:18:27,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 259 transitions. [2021-04-15 02:18:27,275 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 259 transitions. Word has length 18 [2021-04-15 02:18:27,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:27,275 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 259 transitions. [2021-04-15 02:18:27,275 INFO L481 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) [2021-04-15 02:18:27,275 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 259 transitions. [2021-04-15 02:18:27,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:27,275 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:27,276 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:27,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-04-15 02:18:27,276 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:27,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:27,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1695120054, now seen corresponding path program 5 times [2021-04-15 02:18:27,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:27,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319241017] [2021-04-15 02:18:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:27,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:27,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319241017] [2021-04-15 02:18:27,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:27,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:27,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547170936] [2021-04-15 02:18:27,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:27,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:27,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:27,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:27,327 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) [2021-04-15 02:18:27,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:27,416 INFO L93 Difference]: Finished difference Result 182 states and 358 transitions. [2021-04-15 02:18:27,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:27,416 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 [2021-04-15 02:18:27,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:27,417 INFO L225 Difference]: With dead ends: 182 [2021-04-15 02:18:27,417 INFO L226 Difference]: Without dead ends: 173 [2021-04-15 02:18:27,418 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:27,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-04-15 02:18:27,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 126. [2021-04-15 02:18:27,423 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) [2021-04-15 02:18:27,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 263 transitions. [2021-04-15 02:18:27,423 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 263 transitions. Word has length 18 [2021-04-15 02:18:27,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:27,424 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 263 transitions. [2021-04-15 02:18:27,424 INFO L481 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) [2021-04-15 02:18:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 263 transitions. [2021-04-15 02:18:27,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:27,424 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:27,424 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:27,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-04-15 02:18:27,424 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:27,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:27,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1706483244, now seen corresponding path program 6 times [2021-04-15 02:18:27,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:27,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188213599] [2021-04-15 02:18:27,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:27,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:27,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188213599] [2021-04-15 02:18:27,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:27,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:27,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409203084] [2021-04-15 02:18:27,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:27,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:27,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:27,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:27,476 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) [2021-04-15 02:18:27,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:27,570 INFO L93 Difference]: Finished difference Result 171 states and 344 transitions. [2021-04-15 02:18:27,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:27,570 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 [2021-04-15 02:18:27,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:27,571 INFO L225 Difference]: With dead ends: 171 [2021-04-15 02:18:27,571 INFO L226 Difference]: Without dead ends: 148 [2021-04-15 02:18:27,571 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:27,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-04-15 02:18:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 102. [2021-04-15 02:18:27,574 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) [2021-04-15 02:18:27,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 207 transitions. [2021-04-15 02:18:27,575 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 207 transitions. Word has length 18 [2021-04-15 02:18:27,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:27,575 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 207 transitions. [2021-04-15 02:18:27,575 INFO L481 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) [2021-04-15 02:18:27,575 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 207 transitions. [2021-04-15 02:18:27,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:27,575 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:27,575 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:27,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-04-15 02:18:27,576 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:27,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:27,576 INFO L82 PathProgramCache]: Analyzing trace with hash -493733101, now seen corresponding path program 8 times [2021-04-15 02:18:27,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:27,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625501433] [2021-04-15 02:18:27,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:27,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:27,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625501433] [2021-04-15 02:18:27,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:27,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:27,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544331467] [2021-04-15 02:18:27,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:27,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:27,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:27,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:27,636 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) [2021-04-15 02:18:27,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:27,791 INFO L93 Difference]: Finished difference Result 166 states and 313 transitions. [2021-04-15 02:18:27,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 02:18:27,792 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 [2021-04-15 02:18:27,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:27,793 INFO L225 Difference]: With dead ends: 166 [2021-04-15 02:18:27,793 INFO L226 Difference]: Without dead ends: 145 [2021-04-15 02:18:27,794 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-04-15 02:18:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-04-15 02:18:27,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-04-15 02:18:27,801 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) [2021-04-15 02:18:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 212 transitions. [2021-04-15 02:18:27,803 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 212 transitions. Word has length 18 [2021-04-15 02:18:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:27,803 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 212 transitions. [2021-04-15 02:18:27,803 INFO L481 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) [2021-04-15 02:18:27,804 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 212 transitions. [2021-04-15 02:18:27,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:27,804 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:27,804 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:27,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-04-15 02:18:27,804 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:27,805 INFO L82 PathProgramCache]: Analyzing trace with hash -169262091, now seen corresponding path program 9 times [2021-04-15 02:18:27,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:27,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773735908] [2021-04-15 02:18:27,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:27,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:27,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:27,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773735908] [2021-04-15 02:18:27,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:27,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:27,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531407236] [2021-04-15 02:18:27,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:27,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:27,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:27,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:27,876 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) [2021-04-15 02:18:28,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:28,030 INFO L93 Difference]: Finished difference Result 166 states and 310 transitions. [2021-04-15 02:18:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 02:18:28,030 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 [2021-04-15 02:18:28,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:28,031 INFO L225 Difference]: With dead ends: 166 [2021-04-15 02:18:28,031 INFO L226 Difference]: Without dead ends: 157 [2021-04-15 02:18:28,034 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-04-15 02:18:28,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-04-15 02:18:28,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 107. [2021-04-15 02:18:28,037 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) [2021-04-15 02:18:28,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 213 transitions. [2021-04-15 02:18:28,038 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 213 transitions. Word has length 18 [2021-04-15 02:18:28,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:28,038 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 213 transitions. [2021-04-15 02:18:28,038 INFO L481 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) [2021-04-15 02:18:28,039 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 213 transitions. [2021-04-15 02:18:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:28,039 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:28,039 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:28,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-04-15 02:18:28,039 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:28,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:28,040 INFO L82 PathProgramCache]: Analyzing trace with hash 724101907, now seen corresponding path program 10 times [2021-04-15 02:18:28,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:28,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995268164] [2021-04-15 02:18:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:28,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:28,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995268164] [2021-04-15 02:18:28,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:28,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:28,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407111095] [2021-04-15 02:18:28,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:28,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:28,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:28,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:28,110 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) [2021-04-15 02:18:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:28,300 INFO L93 Difference]: Finished difference Result 155 states and 296 transitions. [2021-04-15 02:18:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 02:18:28,300 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 [2021-04-15 02:18:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:28,301 INFO L225 Difference]: With dead ends: 155 [2021-04-15 02:18:28,301 INFO L226 Difference]: Without dead ends: 106 [2021-04-15 02:18:28,301 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 155.2ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-04-15 02:18:28,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-04-15 02:18:28,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2021-04-15 02:18:28,303 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) [2021-04-15 02:18:28,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 159 transitions. [2021-04-15 02:18:28,304 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 159 transitions. Word has length 18 [2021-04-15 02:18:28,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:28,304 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 159 transitions. [2021-04-15 02:18:28,304 INFO L481 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) [2021-04-15 02:18:28,304 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 159 transitions. [2021-04-15 02:18:28,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:28,304 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:28,304 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:28,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-04-15 02:18:28,304 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:28,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:28,305 INFO L82 PathProgramCache]: Analyzing trace with hash 283747689, now seen corresponding path program 11 times [2021-04-15 02:18:28,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:28,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433044219] [2021-04-15 02:18:28,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:28,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433044219] [2021-04-15 02:18:28,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:28,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:28,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982792851] [2021-04-15 02:18:28,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:28,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:28,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:28,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:28,366 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) [2021-04-15 02:18:28,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:28,467 INFO L93 Difference]: Finished difference Result 110 states and 216 transitions. [2021-04-15 02:18:28,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:28,467 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 [2021-04-15 02:18:28,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:28,468 INFO L225 Difference]: With dead ends: 110 [2021-04-15 02:18:28,468 INFO L226 Difference]: Without dead ends: 82 [2021-04-15 02:18:28,468 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:28,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-04-15 02:18:28,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 66. [2021-04-15 02:18:28,470 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) [2021-04-15 02:18:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 129 transitions. [2021-04-15 02:18:28,470 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 129 transitions. Word has length 18 [2021-04-15 02:18:28,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:28,470 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 129 transitions. [2021-04-15 02:18:28,470 INFO L481 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) [2021-04-15 02:18:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 129 transitions. [2021-04-15 02:18:28,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:28,471 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:28,471 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:28,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-04-15 02:18:28,471 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:28,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:28,471 INFO L82 PathProgramCache]: Analyzing trace with hash -386519237, now seen corresponding path program 12 times [2021-04-15 02:18:28,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:28,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837212929] [2021-04-15 02:18:28,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:28,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837212929] [2021-04-15 02:18:28,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:28,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:28,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609452017] [2021-04-15 02:18:28,528 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:28,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:28,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:28,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:28,529 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) [2021-04-15 02:18:28,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:28,660 INFO L93 Difference]: Finished difference Result 116 states and 211 transitions. [2021-04-15 02:18:28,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:28,660 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 [2021-04-15 02:18:28,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:28,661 INFO L225 Difference]: With dead ends: 116 [2021-04-15 02:18:28,661 INFO L226 Difference]: Without dead ends: 103 [2021-04-15 02:18:28,661 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:28,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-04-15 02:18:28,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2021-04-15 02:18:28,663 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) [2021-04-15 02:18:28,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 156 transitions. [2021-04-15 02:18:28,663 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 156 transitions. Word has length 18 [2021-04-15 02:18:28,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:28,663 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 156 transitions. [2021-04-15 02:18:28,663 INFO L481 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) [2021-04-15 02:18:28,663 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 156 transitions. [2021-04-15 02:18:28,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:28,664 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:28,664 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:28,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-04-15 02:18:28,664 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:28,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:28,664 INFO L82 PathProgramCache]: Analyzing trace with hash 506844761, now seen corresponding path program 13 times [2021-04-15 02:18:28,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:28,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288340412] [2021-04-15 02:18:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:28,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:28,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:28,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288340412] [2021-04-15 02:18:28,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:28,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:28,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897794061] [2021-04-15 02:18:28,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:28,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:28,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:28,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:28,751 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) [2021-04-15 02:18:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:28,874 INFO L93 Difference]: Finished difference Result 101 states and 189 transitions. [2021-04-15 02:18:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:28,874 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 [2021-04-15 02:18:28,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:28,875 INFO L225 Difference]: With dead ends: 101 [2021-04-15 02:18:28,875 INFO L226 Difference]: Without dead ends: 70 [2021-04-15 02:18:28,875 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:28,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-04-15 02:18:28,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-04-15 02:18:28,876 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) [2021-04-15 02:18:28,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 119 transitions. [2021-04-15 02:18:28,876 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 119 transitions. Word has length 18 [2021-04-15 02:18:28,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:28,876 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 119 transitions. [2021-04-15 02:18:28,876 INFO L481 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) [2021-04-15 02:18:28,877 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 119 transitions. [2021-04-15 02:18:28,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:28,877 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:28,877 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:28,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-04-15 02:18:28,877 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:28,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:28,877 INFO L82 PathProgramCache]: Analyzing trace with hash -670318101, now seen corresponding path program 14 times [2021-04-15 02:18:28,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:28,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098708752] [2021-04-15 02:18:28,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:28,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098708752] [2021-04-15 02:18:28,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:28,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:28,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763759382] [2021-04-15 02:18:28,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:28,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:28,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:28,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:28,925 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) [2021-04-15 02:18:29,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:29,059 INFO L93 Difference]: Finished difference Result 112 states and 193 transitions. [2021-04-15 02:18:29,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:29,060 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 [2021-04-15 02:18:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:29,060 INFO L225 Difference]: With dead ends: 112 [2021-04-15 02:18:29,060 INFO L226 Difference]: Without dead ends: 91 [2021-04-15 02:18:29,061 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:29,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-04-15 02:18:29,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2021-04-15 02:18:29,066 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) [2021-04-15 02:18:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 124 transitions. [2021-04-15 02:18:29,067 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 124 transitions. Word has length 18 [2021-04-15 02:18:29,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:29,067 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 124 transitions. [2021-04-15 02:18:29,067 INFO L481 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) [2021-04-15 02:18:29,067 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 124 transitions. [2021-04-15 02:18:29,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:29,068 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:29,068 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:29,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-04-15 02:18:29,068 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:29,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:29,068 INFO L82 PathProgramCache]: Analyzing trace with hash -345847091, now seen corresponding path program 15 times [2021-04-15 02:18:29,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:29,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815871204] [2021-04-15 02:18:29,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:29,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815871204] [2021-04-15 02:18:29,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:29,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:29,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750834706] [2021-04-15 02:18:29,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:29,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:29,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:29,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:29,127 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) [2021-04-15 02:18:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:29,238 INFO L93 Difference]: Finished difference Result 100 states and 168 transitions. [2021-04-15 02:18:29,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:29,238 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 [2021-04-15 02:18:29,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:29,239 INFO L225 Difference]: With dead ends: 100 [2021-04-15 02:18:29,239 INFO L226 Difference]: Without dead ends: 91 [2021-04-15 02:18:29,239 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:29,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-04-15 02:18:29,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 69. [2021-04-15 02:18:29,241 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) [2021-04-15 02:18:29,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 125 transitions. [2021-04-15 02:18:29,241 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 125 transitions. Word has length 18 [2021-04-15 02:18:29,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:29,241 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 125 transitions. [2021-04-15 02:18:29,241 INFO L481 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) [2021-04-15 02:18:29,241 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 125 transitions. [2021-04-15 02:18:29,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:29,242 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:29,242 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:29,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-04-15 02:18:29,242 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:29,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:29,242 INFO L82 PathProgramCache]: Analyzing trace with hash 547516907, now seen corresponding path program 16 times [2021-04-15 02:18:29,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:29,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985462976] [2021-04-15 02:18:29,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:29,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:29,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985462976] [2021-04-15 02:18:29,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:29,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:29,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713471103] [2021-04-15 02:18:29,305 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:29,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:29,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:29,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:29,306 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) [2021-04-15 02:18:29,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:29,417 INFO L93 Difference]: Finished difference Result 89 states and 154 transitions. [2021-04-15 02:18:29,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:29,417 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 [2021-04-15 02:18:29,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:29,418 INFO L225 Difference]: With dead ends: 89 [2021-04-15 02:18:29,418 INFO L226 Difference]: Without dead ends: 48 [2021-04-15 02:18:29,418 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:29,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-04-15 02:18:29,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-04-15 02:18:29,419 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) [2021-04-15 02:18:29,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 75 transitions. [2021-04-15 02:18:29,420 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 75 transitions. Word has length 18 [2021-04-15 02:18:29,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:29,420 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 75 transitions. [2021-04-15 02:18:29,420 INFO L481 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) [2021-04-15 02:18:29,420 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 75 transitions. [2021-04-15 02:18:29,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:29,421 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:29,421 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:29,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-04-15 02:18:29,421 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:29,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:29,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1859620800, now seen corresponding path program 7 times [2021-04-15 02:18:29,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:29,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201129805] [2021-04-15 02:18:29,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:29,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:29,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201129805] [2021-04-15 02:18:29,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:29,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:29,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840092002] [2021-04-15 02:18:29,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:29,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:29,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:29,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:29,463 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) [2021-04-15 02:18:29,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:29,559 INFO L93 Difference]: Finished difference Result 109 states and 168 transitions. [2021-04-15 02:18:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:29,559 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 [2021-04-15 02:18:29,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:29,560 INFO L225 Difference]: With dead ends: 109 [2021-04-15 02:18:29,560 INFO L226 Difference]: Without dead ends: 88 [2021-04-15 02:18:29,560 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:29,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-04-15 02:18:29,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2021-04-15 02:18:29,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.64) internal successors, (82), 50 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) [2021-04-15 02:18:29,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 82 transitions. [2021-04-15 02:18:29,562 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 82 transitions. Word has length 18 [2021-04-15 02:18:29,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:29,563 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 82 transitions. [2021-04-15 02:18:29,563 INFO L481 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) [2021-04-15 02:18:29,563 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 82 transitions. [2021-04-15 02:18:29,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:29,564 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:29,564 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:29,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-04-15 02:18:29,564 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:29,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:29,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1478454498, now seen corresponding path program 8 times [2021-04-15 02:18:29,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:29,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297523672] [2021-04-15 02:18:29,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:29,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297523672] [2021-04-15 02:18:29,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:29,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:29,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318747926] [2021-04-15 02:18:29,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:29,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:29,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:29,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:29,619 INFO L87 Difference]: Start difference. First operand 51 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) [2021-04-15 02:18:29,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:29,711 INFO L93 Difference]: Finished difference Result 103 states and 153 transitions. [2021-04-15 02:18:29,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:29,712 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 [2021-04-15 02:18:29,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:29,712 INFO L225 Difference]: With dead ends: 103 [2021-04-15 02:18:29,712 INFO L226 Difference]: Without dead ends: 94 [2021-04-15 02:18:29,712 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:29,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-04-15 02:18:29,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 52. [2021-04-15 02:18:29,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 51 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:29,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 83 transitions. [2021-04-15 02:18:29,714 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 83 transitions. Word has length 18 [2021-04-15 02:18:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:29,714 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 83 transitions. [2021-04-15 02:18:29,714 INFO L481 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) [2021-04-15 02:18:29,715 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 83 transitions. [2021-04-15 02:18:29,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:29,715 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:29,715 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:29,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-04-15 02:18:29,715 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:29,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:29,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1923148800, now seen corresponding path program 9 times [2021-04-15 02:18:29,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:29,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769807005] [2021-04-15 02:18:29,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:29,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:29,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769807005] [2021-04-15 02:18:29,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:29,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:29,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511387979] [2021-04-15 02:18:29,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:29,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:29,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:29,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:29,765 INFO L87 Difference]: Start difference. First operand 52 states and 83 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) [2021-04-15 02:18:29,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:29,859 INFO L93 Difference]: Finished difference Result 92 states and 139 transitions. [2021-04-15 02:18:29,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:29,860 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 [2021-04-15 02:18:29,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:29,860 INFO L225 Difference]: With dead ends: 92 [2021-04-15 02:18:29,861 INFO L226 Difference]: Without dead ends: 65 [2021-04-15 02:18:29,863 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:29,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-04-15 02:18:29,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 39. [2021-04-15 02:18:29,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 38 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:29,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 59 transitions. [2021-04-15 02:18:29,866 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 59 transitions. Word has length 18 [2021-04-15 02:18:29,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:29,867 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 59 transitions. [2021-04-15 02:18:29,867 INFO L481 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) [2021-04-15 02:18:29,867 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 59 transitions. [2021-04-15 02:18:29,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:29,868 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:29,868 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:29,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-04-15 02:18:29,868 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:29,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:29,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1683572320, now seen corresponding path program 10 times [2021-04-15 02:18:29,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:29,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164724028] [2021-04-15 02:18:29,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:29,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:29,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:29,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164724028] [2021-04-15 02:18:29,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:29,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-04-15 02:18:29,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897419778] [2021-04-15 02:18:29,918 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 02:18:29,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:29,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 02:18:29,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-04-15 02:18:29,919 INFO L87 Difference]: Start difference. First operand 39 states and 59 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) [2021-04-15 02:18:29,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:29,987 INFO L93 Difference]: Finished difference Result 63 states and 94 transitions. [2021-04-15 02:18:29,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 02:18:29,988 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 [2021-04-15 02:18:29,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:29,988 INFO L225 Difference]: With dead ends: 63 [2021-04-15 02:18:29,988 INFO L226 Difference]: Without dead ends: 39 [2021-04-15 02:18:29,988 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 02:18:29,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-04-15 02:18:29,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2021-04-15 02:18:29,989 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) [2021-04-15 02:18:29,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 56 transitions. [2021-04-15 02:18:29,989 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 56 transitions. Word has length 18 [2021-04-15 02:18:29,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:29,989 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 56 transitions. [2021-04-15 02:18:29,989 INFO L481 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) [2021-04-15 02:18:29,989 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 56 transitions. [2021-04-15 02:18:29,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:29,989 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:29,989 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:29,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-04-15 02:18:29,990 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:29,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:29,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1726756319, now seen corresponding path program 17 times [2021-04-15 02:18:29,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:29,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305125304] [2021-04-15 02:18:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:30,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305125304] [2021-04-15 02:18:30,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:30,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:30,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153673558] [2021-04-15 02:18:30,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:30,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:30,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:30,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:30,070 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) [2021-04-15 02:18:30,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:30,197 INFO L93 Difference]: Finished difference Result 71 states and 102 transitions. [2021-04-15 02:18:30,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:30,198 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 [2021-04-15 02:18:30,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:30,198 INFO L225 Difference]: With dead ends: 71 [2021-04-15 02:18:30,198 INFO L226 Difference]: Without dead ends: 50 [2021-04-15 02:18:30,198 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-04-15 02:18:30,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2021-04-15 02:18:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 36 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) [2021-04-15 02:18:30,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 52 transitions. [2021-04-15 02:18:30,200 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 52 transitions. Word has length 18 [2021-04-15 02:18:30,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:30,200 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 52 transitions. [2021-04-15 02:18:30,200 INFO L481 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) [2021-04-15 02:18:30,200 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 52 transitions. [2021-04-15 02:18:30,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:30,200 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:30,200 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:30,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-04-15 02:18:30,200 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:30,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:30,201 INFO L82 PathProgramCache]: Analyzing trace with hash -2107922621, now seen corresponding path program 18 times [2021-04-15 02:18:30,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:30,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208453565] [2021-04-15 02:18:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:30,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208453565] [2021-04-15 02:18:30,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:30,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:30,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683647933] [2021-04-15 02:18:30,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:30,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:30,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:30,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:30,257 INFO L87 Difference]: Start difference. First operand 37 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) [2021-04-15 02:18:30,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:30,358 INFO L93 Difference]: Finished difference Result 63 states and 83 transitions. [2021-04-15 02:18:30,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:30,358 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 [2021-04-15 02:18:30,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:30,358 INFO L225 Difference]: With dead ends: 63 [2021-04-15 02:18:30,359 INFO L226 Difference]: Without dead ends: 54 [2021-04-15 02:18:30,359 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 117.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:30,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-04-15 02:18:30,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2021-04-15 02:18:30,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:30,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 51 transitions. [2021-04-15 02:18:30,360 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 51 transitions. Word has length 18 [2021-04-15 02:18:30,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:30,360 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 51 transitions. [2021-04-15 02:18:30,360 INFO L481 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) [2021-04-15 02:18:30,360 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 51 transitions. [2021-04-15 02:18:30,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:30,361 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:30,361 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:30,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-04-15 02:18:30,361 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:30,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:30,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1214558623, now seen corresponding path program 19 times [2021-04-15 02:18:30,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:30,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719509763] [2021-04-15 02:18:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:30,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719509763] [2021-04-15 02:18:30,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:30,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:30,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034182195] [2021-04-15 02:18:30,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:30,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:30,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:30,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:30,421 INFO L87 Difference]: Start difference. First operand 37 states and 51 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) [2021-04-15 02:18:30,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:30,519 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2021-04-15 02:18:30,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:30,519 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 [2021-04-15 02:18:30,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:30,520 INFO L225 Difference]: With dead ends: 52 [2021-04-15 02:18:30,520 INFO L226 Difference]: Without dead ends: 35 [2021-04-15 02:18:30,520 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:30,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-04-15 02:18:30,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2021-04-15 02:18:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 02:18:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-04-15 02:18:30,521 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 18 [2021-04-15 02:18:30,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:30,521 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-04-15 02:18:30,521 INFO L481 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) [2021-04-15 02:18:30,521 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-04-15 02:18:30,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-04-15 02:18:30,522 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 02:18:30,522 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 02:18:30,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-04-15 02:18:30,522 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 02:18:30,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 02:18:30,522 INFO L82 PathProgramCache]: Analyzing trace with hash -974982143, now seen corresponding path program 20 times [2021-04-15 02:18:30,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 02:18:30,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591710856] [2021-04-15 02:18:30,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 02:18:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 02:18:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 02:18:30,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591710856] [2021-04-15 02:18:30,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 02:18:30,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-04-15 02:18:30,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889346144] [2021-04-15 02:18:30,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 02:18:30,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 02:18:30,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 02:18:30,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-04-15 02:18:30,579 INFO L87 Difference]: Start difference. First operand 29 states and 39 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) [2021-04-15 02:18:30,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 02:18:30,662 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2021-04-15 02:18:30,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 02:18:30,663 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 [2021-04-15 02:18:30,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 02:18:30,663 INFO L225 Difference]: With dead ends: 33 [2021-04-15 02:18:30,663 INFO L226 Difference]: Without dead ends: 0 [2021-04-15 02:18:30,663 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-04-15 02:18:30,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-04-15 02:18:30,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-04-15 02:18:30,663 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) [2021-04-15 02:18:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-04-15 02:18:30,664 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-04-15 02:18:30,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 02:18:30,664 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-04-15 02:18:30,664 INFO L481 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) [2021-04-15 02:18:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-04-15 02:18:30,664 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-04-15 02:18:30,664 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-04-15 02:18:30,668 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 02:18:30 BasicIcfg [2021-04-15 02:18:30,668 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 02:18:30,669 INFO L168 Benchmark]: Toolchain (without parser) took 9764.38 ms. Allocated memory was 346.0 MB in the beginning and 415.2 MB in the end (delta: 69.2 MB). Free memory was 326.2 MB in the beginning and 210.0 MB in the end (delta: 116.3 MB). Peak memory consumption was 185.6 MB. Max. memory is 16.0 GB. [2021-04-15 02:18:30,669 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 346.0 MB. Free memory was 327.3 MB in the beginning and 327.2 MB in the end (delta: 79.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:18:30,669 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.71 ms. Allocated memory is still 346.0 MB. Free memory was 326.1 MB in the beginning and 324.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 02:18:30,669 INFO L168 Benchmark]: Boogie Preprocessor took 11.25 ms. Allocated memory is still 346.0 MB. Free memory was 324.6 MB in the beginning and 323.8 MB in the end (delta: 893.5 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 02:18:30,669 INFO L168 Benchmark]: RCFGBuilder took 249.67 ms. Allocated memory is still 346.0 MB. Free memory was 323.8 MB in the beginning and 313.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-04-15 02:18:30,669 INFO L168 Benchmark]: TraceAbstraction took 9469.73 ms. Allocated memory was 346.0 MB in the beginning and 415.2 MB in the end (delta: 69.2 MB). Free memory was 312.8 MB in the beginning and 210.0 MB in the end (delta: 102.8 MB). Peak memory consumption was 173.0 MB. Max. memory is 16.0 GB. [2021-04-15 02:18:30,670 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14 ms. Allocated memory is still 346.0 MB. Free memory was 327.3 MB in the beginning and 327.2 MB in the end (delta: 79.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.71 ms. Allocated memory is still 346.0 MB. Free memory was 326.1 MB in the beginning and 324.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.25 ms. Allocated memory is still 346.0 MB. Free memory was 324.6 MB in the beginning and 323.8 MB in the end (delta: 893.5 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 249.67 ms. Allocated memory is still 346.0 MB. Free memory was 323.8 MB in the beginning and 313.3 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 9469.73 ms. Allocated memory was 346.0 MB in the beginning and 415.2 MB in the end (delta: 69.2 MB). Free memory was 312.8 MB in the beginning and 210.0 MB in the end (delta: 102.8 MB). Peak memory consumption was 173.0 MB. Max. memory is 16.0 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 9308.3ms, OverallIterations: 48, TraceHistogramMax: 1, EmptinessCheckTime: 41.4ms, AutomataDifference: 5599.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 41.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2185 SDtfs, 3031 SDslu, 6767 SDs, 0 SdLazy, 2178 SolverSat, 90 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1376.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 560 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 459 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 5052.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=131occurred in iteration=27, InterpolantAutomatonStates: 357, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 256.2ms AutomataMinimizationTime, 48 MinimizatonAttempts, 1682 StatesRemovedByMinimization, 47 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 51.5ms SsaConstructionTime, 152.6ms SatisfiabilityAnalysisTime, 2776.1ms InterpolantComputationTime, 861 NumberOfCodeBlocks, 861 NumberOfCodeBlocksAsserted, 48 NumberOfCheckSat, 813 ConstructedInterpolants, 0 QuantifiedInterpolants, 5483 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 RESULT: Ultimate proved your program to be correct! Received shutdown request...