/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/pthread_inc.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 13:06:44,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 13:06:44,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 13:06:44,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 13:06:44,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-05 13:06:44,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-05 13:06:44,551 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-05 13:06:44,552 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-05 13:06:44,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-05 13:06:44,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-05 13:06:44,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-05 13:06:44,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-05 13:06:44,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-05 13:06:44,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-05 13:06:44,558 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-05 13:06:44,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-05 13:06:44,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-05 13:06:44,562 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-05 13:06:44,563 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-05 13:06:44,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-05 13:06:44,564 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-05 13:06:44,564 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-05 13:06:44,565 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-05 13:06:44,565 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-05 13:06:44,565 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-06-05 13:06:44,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 13:06:44,566 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 13:06:44,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 13:06:44,567 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-Separate.epf [2021-06-05 13:06:44,581 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 13:06:44,581 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 13:06:44,581 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 13:06:44,581 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 13:06:44,582 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 13:06:44,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 13:06:44,582 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 13:06:44,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 13:06:44,583 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 13:06:44,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 13:06:44,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 13:06:44,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 13:06:44,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 13:06:44,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 13:06:44,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 13:06:44,584 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 13:06:44,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 13:06:44,584 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 13:06:44,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 13:06:44,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 13:06:44,584 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 13:06:44,584 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 13:06:44,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 13:06:44,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 13:06:44,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 13:06:44,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 13:06:44,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 13:06:44,585 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 13:06:44,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 13:06:44,585 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 13:06:44,585 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 13:06:44,585 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 13:06:44,586 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 13:06:44,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 13:06:44,845 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 13:06:44,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 13:06:44,847 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 13:06:44,847 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 13:06:44,848 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/pthread_inc.bpl [2021-06-05 13:06:44,848 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/pthread_inc.bpl' [2021-06-05 13:06:44,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 13:06:44,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 13:06:44,882 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 13:06:44,882 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 13:06:44,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 13:06:44,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:44" (1/1) ... [2021-06-05 13:06:44,895 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:44" (1/1) ... [2021-06-05 13:06:44,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 13:06:44,901 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 13:06:44,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 13:06:44,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 13:06:44,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:44" (1/1) ... [2021-06-05 13:06:44,907 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:44" (1/1) ... [2021-06-05 13:06:44,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:44" (1/1) ... [2021-06-05 13:06:44,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:44" (1/1) ... [2021-06-05 13:06:44,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:44" (1/1) ... [2021-06-05 13:06:44,911 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:44" (1/1) ... [2021-06-05 13:06:44,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:44" (1/1) ... [2021-06-05 13:06:44,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 13:06:44,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 13:06:44,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 13:06:44,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 13:06:44,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:44" (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 [2021-06-05 13:06:44,971 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 13:06:44,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 13:06:44,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 13:06:44,972 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-06-05 13:06:44,972 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-06-05 13:06:44,972 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-06-05 13:06:44,972 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 13:06:45,091 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 13:06:45,093 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-05 13:06:45,098 INFO L202 PluginConnector]: Adding new model pthread_inc.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:06:45 BoogieIcfgContainer [2021-06-05 13:06:45,098 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 13:06:45,101 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 13:06:45,101 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 13:06:45,103 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 13:06:45,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 01:06:44" (1/2) ... [2021-06-05 13:06:45,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d2cc83c and model type pthread_inc.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 01:06:45, skipping insertion in model container [2021-06-05 13:06:45,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "pthread_inc.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 01:06:45" (2/2) ... [2021-06-05 13:06:45,107 INFO L111 eAbstractionObserver]: Analyzing ICFG pthread_inc.bpl [2021-06-05 13:06:45,113 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 13:06:45,113 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 13:06:45,113 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 13:06:45,114 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 13:06:45,128 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,128 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,129 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,129 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,131 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,131 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,131 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,132 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,140 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,143 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 13:06:45,156 INFO L255 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-06-05 13:06:45,179 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:06:45,179 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:06:45,179 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:06:45,179 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:06:45,179 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:06:45,179 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:06:45,179 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:06:45,179 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:06:45,186 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 14 places, 11 transitions, 27 flow [2021-06-05 13:06:45,193 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 27 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,194 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 13:06:45,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:45,198 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:45,198 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:45,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:45,203 INFO L82 PathProgramCache]: Analyzing trace with hash -924550739, now seen corresponding path program 1 times [2021-06-05 13:06:45,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:45,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959103317] [2021-06-05 13:06:45,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:45,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:45,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959103317] [2021-06-05 13:06:45,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959103317] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:45,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:45,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:06:45,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700038817] [2021-06-05 13:06:45,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:06:45,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:45,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:06:45,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:45,300 INFO L87 Difference]: Start difference. First operand has 27 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:45,312 INFO L93 Difference]: Finished difference Result 24 states and 35 transitions. [2021-06-05 13:06:45,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:06:45,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-06-05 13:06:45,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:45,329 INFO L225 Difference]: With dead ends: 24 [2021-06-05 13:06:45,329 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 13:06:45,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:45,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 13:06:45,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 13:06:45,350 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) [2021-06-05 13:06:45,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 13:06:45,351 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 7 [2021-06-05 13:06:45,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:45,351 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 13:06:45,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,351 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 13:06:45,351 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 13:06:45,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 13:06:45,352 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-06-05 13:06:45,353 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 13:06:45,354 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:06:45,354 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:06:45,354 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:06:45,354 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:06:45,354 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:06:45,354 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:06:45,354 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:06:45,354 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-06-05 13:06:45,355 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 14 places, 11 transitions, 27 flow [2021-06-05 13:06:45,356 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 27 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,356 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-06-05 13:06:45,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:45,357 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-06-05 13:06:45,357 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:06:45,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:45,357 INFO L82 PathProgramCache]: Analyzing trace with hash 50162, now seen corresponding path program 1 times [2021-06-05 13:06:45,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:45,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426470402] [2021-06-05 13:06:45,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:45,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:06:45,360 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:06:45,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:06:45,361 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:06:45,369 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 13:06:45,369 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 13:06:45,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 13:06:45,370 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-06-05 13:06:45,370 WARN L242 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 13:06:45,370 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-06-05 13:06:45,373 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,373 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,373 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,373 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,373 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,374 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,374 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,374 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,374 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,374 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,374 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,374 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,375 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,375 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,375 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,375 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,375 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,376 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,377 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 13:06:45,377 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 13:06:45,378 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:06:45,378 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:06:45,378 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:06:45,379 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:06:45,379 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:06:45,379 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:06:45,379 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:06:45,379 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:06:45,380 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 50 flow [2021-06-05 13:06:45,395 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 211 states, 200 states have (on average 2.485) internal successors, (497), 210 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,396 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 200 states have (on average 2.485) internal successors, (497), 210 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 13:06:45,397 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:45,398 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:45,398 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:45,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:45,398 INFO L82 PathProgramCache]: Analyzing trace with hash -479360263, now seen corresponding path program 1 times [2021-06-05 13:06:45,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:45,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584628184] [2021-06-05 13:06:45,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:45,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:45,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:45,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584628184] [2021-06-05 13:06:45,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584628184] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:45,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:45,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:06:45,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746632837] [2021-06-05 13:06:45,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:06:45,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:45,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:06:45,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:45,415 INFO L87 Difference]: Start difference. First operand has 211 states, 200 states have (on average 2.485) internal successors, (497), 210 states have internal predecessors, (497), 0 states have call successors, (0), 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, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:45,457 INFO L93 Difference]: Finished difference Result 260 states and 602 transitions. [2021-06-05 13:06:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:06:45,457 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-06-05 13:06:45,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:45,462 INFO L225 Difference]: With dead ends: 260 [2021-06-05 13:06:45,462 INFO L226 Difference]: Without dead ends: 198 [2021-06-05 13:06:45,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-06-05 13:06:45,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 180. [2021-06-05 13:06:45,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 174 states have (on average 2.396551724137931) internal successors, (417), 179 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 417 transitions. [2021-06-05 13:06:45,485 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 417 transitions. Word has length 7 [2021-06-05 13:06:45,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:45,485 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 417 transitions. [2021-06-05 13:06:45,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,485 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 417 transitions. [2021-06-05 13:06:45,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:06:45,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:45,486 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:45,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 13:06:45,486 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:45,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:45,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1511473967, now seen corresponding path program 1 times [2021-06-05 13:06:45,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:45,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55555694] [2021-06-05 13:06:45,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:45,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:45,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:45,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55555694] [2021-06-05 13:06:45,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55555694] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:45,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:45,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:06:45,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082196136] [2021-06-05 13:06:45,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:06:45,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:45,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:06:45,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:45,511 INFO L87 Difference]: Start difference. First operand 180 states and 417 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:45,545 INFO L93 Difference]: Finished difference Result 174 states and 389 transitions. [2021-06-05 13:06:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:06:45,546 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 13:06:45,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:45,547 INFO L225 Difference]: With dead ends: 174 [2021-06-05 13:06:45,547 INFO L226 Difference]: Without dead ends: 142 [2021-06-05 13:06:45,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:45,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-05 13:06:45,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-06-05 13:06:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 138 states have (on average 2.253623188405797) internal successors, (311), 141 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 311 transitions. [2021-06-05 13:06:45,558 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 311 transitions. Word has length 8 [2021-06-05 13:06:45,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:45,559 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 311 transitions. [2021-06-05 13:06:45,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 311 transitions. [2021-06-05 13:06:45,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:06:45,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:45,563 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:45,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 13:06:45,564 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:45,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:45,565 INFO L82 PathProgramCache]: Analyzing trace with hash 115900371, now seen corresponding path program 1 times [2021-06-05 13:06:45,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:45,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995686729] [2021-06-05 13:06:45,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:45,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:45,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:45,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995686729] [2021-06-05 13:06:45,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995686729] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:45,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:45,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:45,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130649135] [2021-06-05 13:06:45,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:45,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:45,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:45,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:45,599 INFO L87 Difference]: Start difference. First operand 142 states and 311 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:45,637 INFO L93 Difference]: Finished difference Result 172 states and 370 transitions. [2021-06-05 13:06:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:06:45,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:06:45,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:45,639 INFO L225 Difference]: With dead ends: 172 [2021-06-05 13:06:45,639 INFO L226 Difference]: Without dead ends: 130 [2021-06-05 13:06:45,639 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:45,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-06-05 13:06:45,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-06-05 13:06:45,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 126 states have (on average 2.2142857142857144) internal successors, (279), 129 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 279 transitions. [2021-06-05 13:06:45,647 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 279 transitions. Word has length 11 [2021-06-05 13:06:45,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:45,647 INFO L482 AbstractCegarLoop]: Abstraction has 130 states and 279 transitions. [2021-06-05 13:06:45,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,647 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 279 transitions. [2021-06-05 13:06:45,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:06:45,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:45,648 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:45,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 13:06:45,648 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:45,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:45,649 INFO L82 PathProgramCache]: Analyzing trace with hash -150011963, now seen corresponding path program 1 times [2021-06-05 13:06:45,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:45,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004924886] [2021-06-05 13:06:45,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:45,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:45,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:45,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004924886] [2021-06-05 13:06:45,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004924886] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:45,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:45,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:06:45,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773824498] [2021-06-05 13:06:45,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:06:45,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:45,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:06:45,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:45,663 INFO L87 Difference]: Start difference. First operand 130 states and 279 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:45,669 INFO L93 Difference]: Finished difference Result 58 states and 102 transitions. [2021-06-05 13:06:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:06:45,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:06:45,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:45,670 INFO L225 Difference]: With dead ends: 58 [2021-06-05 13:06:45,670 INFO L226 Difference]: Without dead ends: 52 [2021-06-05 13:06:45,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:45,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-05 13:06:45,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-06-05 13:06:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.84) internal successors, (92), 51 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 92 transitions. [2021-06-05 13:06:45,674 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 92 transitions. Word has length 11 [2021-06-05 13:06:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:45,674 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 92 transitions. [2021-06-05 13:06:45,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,674 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 92 transitions. [2021-06-05 13:06:45,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:06:45,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:45,675 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:45,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 13:06:45,675 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:45,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:45,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1323081787, now seen corresponding path program 2 times [2021-06-05 13:06:45,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:45,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551594360] [2021-06-05 13:06:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:45,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:45,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551594360] [2021-06-05 13:06:45,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551594360] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:45,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:45,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:45,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544776280] [2021-06-05 13:06:45,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:45,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:45,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:45,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:45,700 INFO L87 Difference]: Start difference. First operand 52 states and 92 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:45,729 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2021-06-05 13:06:45,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 13:06:45,729 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:06:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:45,730 INFO L225 Difference]: With dead ends: 40 [2021-06-05 13:06:45,730 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 13:06:45,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:45,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 13:06:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 13:06:45,730 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) [2021-06-05 13:06:45,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 13:06:45,731 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2021-06-05 13:06:45,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:45,731 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 13:06:45,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 13:06:45,731 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 13:06:45,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 13:06:45,731 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-06-05 13:06:45,732 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 13:06:45,734 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:06:45,734 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:06:45,734 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:06:45,734 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:06:45,734 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:06:45,734 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:06:45,734 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:06:45,734 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-06-05 13:06:45,735 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 50 flow [2021-06-05 13:06:45,742 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 211 states, 200 states have (on average 2.485) internal successors, (497), 210 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,742 INFO L276 IsEmpty]: Start isEmpty. Operand has 211 states, 200 states have (on average 2.485) internal successors, (497), 210 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-06-05 13:06:45,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:45,743 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-06-05 13:06:45,743 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:06:45,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:45,743 INFO L82 PathProgramCache]: Analyzing trace with hash 2146966, now seen corresponding path program 1 times [2021-06-05 13:06:45,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:45,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404622186] [2021-06-05 13:06:45,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:06:45,746 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:06:45,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:06:45,748 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:06:45,755 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 13:06:45,755 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 13:06:45,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 13:06:45,756 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-06-05 13:06:45,756 WARN L242 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 13:06:45,757 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-06-05 13:06:45,762 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,763 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,763 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,763 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,764 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,764 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,764 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,764 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,766 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,766 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,766 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,766 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,766 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,767 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,768 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,769 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,769 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,769 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,770 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,770 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,770 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,771 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,771 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,773 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,774 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,775 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,776 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:45,783 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 13:06:45,783 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 13:06:45,784 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:06:45,784 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:06:45,784 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:06:45,784 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:06:45,784 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:06:45,784 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:06:45,785 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:06:45,785 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:06:45,785 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 27 transitions, 75 flow [2021-06-05 13:06:45,843 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1683 states, 1660 states have (on average 3.277710843373494) internal successors, (5441), 1682 states have internal predecessors, (5441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 1683 states, 1660 states have (on average 3.277710843373494) internal successors, (5441), 1682 states have internal predecessors, (5441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 13:06:45,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:45,850 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:45,850 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:45,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:45,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1274047013, now seen corresponding path program 1 times [2021-06-05 13:06:45,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:45,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069519699] [2021-06-05 13:06:45,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:45,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:45,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069519699] [2021-06-05 13:06:45,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069519699] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:45,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:45,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:06:45,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549914764] [2021-06-05 13:06:45,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:06:45,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:45,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:06:45,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:45,880 INFO L87 Difference]: Start difference. First operand has 1683 states, 1660 states have (on average 3.277710843373494) internal successors, (5441), 1682 states have internal predecessors, (5441), 0 states have call successors, (0), 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, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:45,932 INFO L93 Difference]: Finished difference Result 2348 states and 7485 transitions. [2021-06-05 13:06:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:06:45,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-06-05 13:06:45,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:45,947 INFO L225 Difference]: With dead ends: 2348 [2021-06-05 13:06:45,948 INFO L226 Difference]: Without dead ends: 2214 [2021-06-05 13:06:45,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-06-05 13:06:46,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 1892. [2021-06-05 13:06:46,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1875 states have (on average 3.2672) internal successors, (6126), 1891 states have internal predecessors, (6126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 6126 transitions. [2021-06-05 13:06:46,022 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 6126 transitions. Word has length 7 [2021-06-05 13:06:46,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:46,022 INFO L482 AbstractCegarLoop]: Abstraction has 1892 states and 6126 transitions. [2021-06-05 13:06:46,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 6126 transitions. [2021-06-05 13:06:46,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:06:46,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:46,024 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:46,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 13:06:46,024 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:46,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:46,025 INFO L82 PathProgramCache]: Analyzing trace with hash -590723727, now seen corresponding path program 1 times [2021-06-05 13:06:46,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:46,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711645724] [2021-06-05 13:06:46,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:46,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:46,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:46,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711645724] [2021-06-05 13:06:46,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711645724] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:46,061 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:46,061 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:06:46,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439110819] [2021-06-05 13:06:46,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:06:46,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:46,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:06:46,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:46,062 INFO L87 Difference]: Start difference. First operand 1892 states and 6126 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:46,108 INFO L93 Difference]: Finished difference Result 2406 states and 7618 transitions. [2021-06-05 13:06:46,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:06:46,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 13:06:46,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:46,119 INFO L225 Difference]: With dead ends: 2406 [2021-06-05 13:06:46,119 INFO L226 Difference]: Without dead ends: 2336 [2021-06-05 13:06:46,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:46,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2336 states. [2021-06-05 13:06:46,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2336 to 2040. [2021-06-05 13:06:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2040 states, 2024 states have (on average 3.2322134387351777) internal successors, (6542), 2039 states have internal predecessors, (6542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2040 states to 2040 states and 6542 transitions. [2021-06-05 13:06:46,171 INFO L78 Accepts]: Start accepts. Automaton has 2040 states and 6542 transitions. Word has length 8 [2021-06-05 13:06:46,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:46,171 INFO L482 AbstractCegarLoop]: Abstraction has 2040 states and 6542 transitions. [2021-06-05 13:06:46,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2040 states and 6542 transitions. [2021-06-05 13:06:46,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 13:06:46,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:46,173 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:46,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 13:06:46,173 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:46,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:46,173 INFO L82 PathProgramCache]: Analyzing trace with hash -653505140, now seen corresponding path program 1 times [2021-06-05 13:06:46,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:46,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809891943] [2021-06-05 13:06:46,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:46,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:46,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:06:46,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:46,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809891943] [2021-06-05 13:06:46,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809891943] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:46,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:46,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:06:46,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558778153] [2021-06-05 13:06:46,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:06:46,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:46,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:06:46,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:46,201 INFO L87 Difference]: Start difference. First operand 2040 states and 6542 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:46,232 INFO L93 Difference]: Finished difference Result 2316 states and 7182 transitions. [2021-06-05 13:06:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:06:46,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-05 13:06:46,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:46,241 INFO L225 Difference]: With dead ends: 2316 [2021-06-05 13:06:46,241 INFO L226 Difference]: Without dead ends: 2252 [2021-06-05 13:06:46,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:46,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2021-06-05 13:06:46,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 2036. [2021-06-05 13:06:46,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2022 states have (on average 3.1444114737883284) internal successors, (6358), 2035 states have internal predecessors, (6358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 6358 transitions. [2021-06-05 13:06:46,296 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 6358 transitions. Word has length 9 [2021-06-05 13:06:46,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:46,297 INFO L482 AbstractCegarLoop]: Abstraction has 2036 states and 6358 transitions. [2021-06-05 13:06:46,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 6358 transitions. [2021-06-05 13:06:46,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:06:46,298 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:46,298 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:46,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 13:06:46,299 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:46,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:46,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1769361568, now seen corresponding path program 1 times [2021-06-05 13:06:46,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:46,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072922326] [2021-06-05 13:06:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:46,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:46,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:46,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072922326] [2021-06-05 13:06:46,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072922326] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:46,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:46,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:46,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741719904] [2021-06-05 13:06:46,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:46,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:46,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:46,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:46,339 INFO L87 Difference]: Start difference. First operand 2036 states and 6358 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:46,431 INFO L93 Difference]: Finished difference Result 3194 states and 9580 transitions. [2021-06-05 13:06:46,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:46,431 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:06:46,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:46,443 INFO L225 Difference]: With dead ends: 3194 [2021-06-05 13:06:46,444 INFO L226 Difference]: Without dead ends: 3072 [2021-06-05 13:06:46,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:46,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3072 states. [2021-06-05 13:06:46,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3072 to 2194. [2021-06-05 13:06:46,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2194 states, 2180 states have (on average 3.173394495412844) internal successors, (6918), 2193 states have internal predecessors, (6918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2194 states to 2194 states and 6918 transitions. [2021-06-05 13:06:46,520 INFO L78 Accepts]: Start accepts. Automaton has 2194 states and 6918 transitions. Word has length 11 [2021-06-05 13:06:46,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:46,520 INFO L482 AbstractCegarLoop]: Abstraction has 2194 states and 6918 transitions. [2021-06-05 13:06:46,520 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2194 states and 6918 transitions. [2021-06-05 13:06:46,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:06:46,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:46,521 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:46,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 13:06:46,522 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:46,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:46,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1621751968, now seen corresponding path program 2 times [2021-06-05 13:06:46,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:46,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904314743] [2021-06-05 13:06:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:46,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:46,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:46,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904314743] [2021-06-05 13:06:46,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904314743] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:46,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:46,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:06:46,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510932755] [2021-06-05 13:06:46,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:06:46,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:46,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:06:46,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:46,541 INFO L87 Difference]: Start difference. First operand 2194 states and 6918 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:46,551 INFO L93 Difference]: Finished difference Result 1050 states and 2850 transitions. [2021-06-05 13:06:46,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:06:46,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:06:46,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:46,555 INFO L225 Difference]: With dead ends: 1050 [2021-06-05 13:06:46,555 INFO L226 Difference]: Without dead ends: 1036 [2021-06-05 13:06:46,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2021-06-05 13:06:46,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 1036. [2021-06-05 13:06:46,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1023 states have (on average 2.7507331378299122) internal successors, (2814), 1035 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 2814 transitions. [2021-06-05 13:06:46,583 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 2814 transitions. Word has length 11 [2021-06-05 13:06:46,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:46,583 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 2814 transitions. [2021-06-05 13:06:46,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,583 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 2814 transitions. [2021-06-05 13:06:46,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:06:46,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:46,584 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:46,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 13:06:46,584 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:46,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:46,584 INFO L82 PathProgramCache]: Analyzing trace with hash -330379410, now seen corresponding path program 1 times [2021-06-05 13:06:46,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:46,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703472186] [2021-06-05 13:06:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:46,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:46,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:46,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703472186] [2021-06-05 13:06:46,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703472186] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:46,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:46,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:46,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641628216] [2021-06-05 13:06:46,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:46,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:46,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:46,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:46,620 INFO L87 Difference]: Start difference. First operand 1036 states and 2814 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:46,678 INFO L93 Difference]: Finished difference Result 1480 states and 3842 transitions. [2021-06-05 13:06:46,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:46,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:06:46,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:46,683 INFO L225 Difference]: With dead ends: 1480 [2021-06-05 13:06:46,683 INFO L226 Difference]: Without dead ends: 1391 [2021-06-05 13:06:46,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:46,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-06-05 13:06:46,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 931. [2021-06-05 13:06:46,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 919 states have (on average 2.748639825897715) internal successors, (2526), 930 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2526 transitions. [2021-06-05 13:06:46,702 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2526 transitions. Word has length 11 [2021-06-05 13:06:46,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:46,702 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 2526 transitions. [2021-06-05 13:06:46,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,703 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2526 transitions. [2021-06-05 13:06:46,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:06:46,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:46,703 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:46,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 13:06:46,703 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:46,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:46,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2115727862, now seen corresponding path program 1 times [2021-06-05 13:06:46,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:46,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436308360] [2021-06-05 13:06:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:46,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:06:46,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:46,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436308360] [2021-06-05 13:06:46,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436308360] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:46,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:46,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:46,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324422284] [2021-06-05 13:06:46,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:46,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:46,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:46,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:46,739 INFO L87 Difference]: Start difference. First operand 931 states and 2526 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:46,791 INFO L93 Difference]: Finished difference Result 1339 states and 3432 transitions. [2021-06-05 13:06:46,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:46,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:06:46,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:46,795 INFO L225 Difference]: With dead ends: 1339 [2021-06-05 13:06:46,795 INFO L226 Difference]: Without dead ends: 1259 [2021-06-05 13:06:46,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2021-06-05 13:06:46,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 883. [2021-06-05 13:06:46,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 871 states have (on average 2.6681974741676235) internal successors, (2324), 882 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 2324 transitions. [2021-06-05 13:06:46,813 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 2324 transitions. Word has length 12 [2021-06-05 13:06:46,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:46,813 INFO L482 AbstractCegarLoop]: Abstraction has 883 states and 2324 transitions. [2021-06-05 13:06:46,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 2324 transitions. [2021-06-05 13:06:46,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:06:46,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:46,814 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:46,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 13:06:46,814 INFO L430 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:46,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:46,815 INFO L82 PathProgramCache]: Analyzing trace with hash -901489645, now seen corresponding path program 1 times [2021-06-05 13:06:46,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:46,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648063865] [2021-06-05 13:06:46,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:46,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:06:46,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:46,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648063865] [2021-06-05 13:06:46,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648063865] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:46,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:46,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:46,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307815779] [2021-06-05 13:06:46,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:46,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:46,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:46,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:46,848 INFO L87 Difference]: Start difference. First operand 883 states and 2324 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:46,900 INFO L93 Difference]: Finished difference Result 1155 states and 2891 transitions. [2021-06-05 13:06:46,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:46,900 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:06:46,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:46,908 INFO L225 Difference]: With dead ends: 1155 [2021-06-05 13:06:46,908 INFO L226 Difference]: Without dead ends: 1075 [2021-06-05 13:06:46,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:46,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2021-06-05 13:06:46,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 799. [2021-06-05 13:06:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 789 states have (on average 2.5640050697084917) internal successors, (2023), 798 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2023 transitions. [2021-06-05 13:06:46,922 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2023 transitions. Word has length 12 [2021-06-05 13:06:46,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:46,923 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 2023 transitions. [2021-06-05 13:06:46,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,924 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2023 transitions. [2021-06-05 13:06:46,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:06:46,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:46,924 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:46,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 13:06:46,924 INFO L430 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:46,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:46,925 INFO L82 PathProgramCache]: Analyzing trace with hash 515297854, now seen corresponding path program 1 times [2021-06-05 13:06:46,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:46,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747645242] [2021-06-05 13:06:46,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:06:46,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:46,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747645242] [2021-06-05 13:06:46,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747645242] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:46,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:46,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:46,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674031988] [2021-06-05 13:06:46,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:46,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:46,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:46,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:46,948 INFO L87 Difference]: Start difference. First operand 799 states and 2023 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:46,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:46,992 INFO L93 Difference]: Finished difference Result 955 states and 2304 transitions. [2021-06-05 13:06:46,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:46,992 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:06:46,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:47,000 INFO L225 Difference]: With dead ends: 955 [2021-06-05 13:06:47,000 INFO L226 Difference]: Without dead ends: 873 [2021-06-05 13:06:47,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:47,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2021-06-05 13:06:47,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 681. [2021-06-05 13:06:47,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 673 states have (on average 2.4799405646359585) internal successors, (1669), 680 states have internal predecessors, (1669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:47,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 1669 transitions. [2021-06-05 13:06:47,011 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 1669 transitions. Word has length 12 [2021-06-05 13:06:47,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:47,012 INFO L482 AbstractCegarLoop]: Abstraction has 681 states and 1669 transitions. [2021-06-05 13:06:47,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:47,012 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 1669 transitions. [2021-06-05 13:06:47,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:06:47,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:47,012 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:47,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-05 13:06:47,012 INFO L430 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:47,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:47,012 INFO L82 PathProgramCache]: Analyzing trace with hash 515513335, now seen corresponding path program 1 times [2021-06-05 13:06:47,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:47,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81973077] [2021-06-05 13:06:47,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:06:47,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:47,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81973077] [2021-06-05 13:06:47,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81973077] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:47,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:47,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:47,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179352625] [2021-06-05 13:06:47,035 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:47,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:47,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:47,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:47,035 INFO L87 Difference]: Start difference. First operand 681 states and 1669 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:47,078 INFO L93 Difference]: Finished difference Result 843 states and 1948 transitions. [2021-06-05 13:06:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:47,078 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:06:47,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:47,079 INFO L225 Difference]: With dead ends: 843 [2021-06-05 13:06:47,080 INFO L226 Difference]: Without dead ends: 763 [2021-06-05 13:06:47,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:47,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2021-06-05 13:06:47,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 598. [2021-06-05 13:06:47,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 592 states have (on average 2.3412162162162162) internal successors, (1386), 597 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1386 transitions. [2021-06-05 13:06:47,092 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1386 transitions. Word has length 12 [2021-06-05 13:06:47,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:47,093 INFO L482 AbstractCegarLoop]: Abstraction has 598 states and 1386 transitions. [2021-06-05 13:06:47,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:47,093 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1386 transitions. [2021-06-05 13:06:47,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:06:47,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:47,093 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:47,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 13:06:47,093 INFO L430 AbstractCegarLoop]: === Iteration 11 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:47,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:47,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1824347916, now seen corresponding path program 1 times [2021-06-05 13:06:47,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:47,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427287717] [2021-06-05 13:06:47,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:47,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:06:47,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:47,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427287717] [2021-06-05 13:06:47,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427287717] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:47,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:47,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:06:47,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509528540] [2021-06-05 13:06:47,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:06:47,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:47,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:06:47,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:47,150 INFO L87 Difference]: Start difference. First operand 598 states and 1386 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:06:47,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:47,219 INFO L93 Difference]: Finished difference Result 703 states and 1579 transitions. [2021-06-05 13:06:47,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:06:47,220 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:06:47,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:47,221 INFO L225 Difference]: With dead ends: 703 [2021-06-05 13:06:47,221 INFO L226 Difference]: Without dead ends: 625 [2021-06-05 13:06:47,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:06:47,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-06-05 13:06:47,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 523. [2021-06-05 13:06:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 517 states have (on average 2.3307543520309477) internal successors, (1205), 522 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1205 transitions. [2021-06-05 13:06:47,228 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1205 transitions. Word has length 16 [2021-06-05 13:06:47,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:47,228 INFO L482 AbstractCegarLoop]: Abstraction has 523 states and 1205 transitions. [2021-06-05 13:06:47,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:06:47,228 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1205 transitions. [2021-06-05 13:06:47,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:06:47,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:47,229 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:47,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 13:06:47,229 INFO L430 AbstractCegarLoop]: === Iteration 12 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:47,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:47,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1053616386, now seen corresponding path program 1 times [2021-06-05 13:06:47,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:47,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587005094] [2021-06-05 13:06:47,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:47,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:06:47,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:47,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587005094] [2021-06-05 13:06:47,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587005094] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:47,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:47,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:06:47,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796945338] [2021-06-05 13:06:47,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:06:47,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:47,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:06:47,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:47,261 INFO L87 Difference]: Start difference. First operand 523 states and 1205 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:06:47,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:47,371 INFO L93 Difference]: Finished difference Result 589 states and 1312 transitions. [2021-06-05 13:06:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:06:47,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:06:47,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:47,372 INFO L225 Difference]: With dead ends: 589 [2021-06-05 13:06:47,372 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 13:06:47,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:06:47,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 13:06:47,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 399. [2021-06-05 13:06:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 395 states have (on average 2.3341772151898734) internal successors, (922), 398 states have internal predecessors, (922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 922 transitions. [2021-06-05 13:06:47,378 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 922 transitions. Word has length 16 [2021-06-05 13:06:47,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:47,379 INFO L482 AbstractCegarLoop]: Abstraction has 399 states and 922 transitions. [2021-06-05 13:06:47,379 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:06:47,379 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 922 transitions. [2021-06-05 13:06:47,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:06:47,379 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:47,379 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:47,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-05 13:06:47,379 INFO L430 AbstractCegarLoop]: === Iteration 13 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:47,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:47,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1859775061, now seen corresponding path program 1 times [2021-06-05 13:06:47,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:47,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708553667] [2021-06-05 13:06:47,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:06:47,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:47,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708553667] [2021-06-05 13:06:47,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708553667] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:47,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:47,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:06:47,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650651482] [2021-06-05 13:06:47,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:06:47,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:47,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:06:47,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:47,409 INFO L87 Difference]: Start difference. First operand 399 states and 922 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:06:47,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:47,475 INFO L93 Difference]: Finished difference Result 441 states and 983 transitions. [2021-06-05 13:06:47,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:06:47,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:06:47,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:47,476 INFO L225 Difference]: With dead ends: 441 [2021-06-05 13:06:47,476 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 13:06:47,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:06:47,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 13:06:47,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 324. [2021-06-05 13:06:47,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 320 states have (on average 2.315625) internal successors, (741), 323 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 741 transitions. [2021-06-05 13:06:47,481 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 741 transitions. Word has length 16 [2021-06-05 13:06:47,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:47,481 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 741 transitions. [2021-06-05 13:06:47,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:06:47,482 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 741 transitions. [2021-06-05 13:06:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:06:47,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:47,482 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:47,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-05 13:06:47,482 INFO L430 AbstractCegarLoop]: === Iteration 14 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:47,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:47,483 INFO L82 PathProgramCache]: Analyzing trace with hash 420792910, now seen corresponding path program 1 times [2021-06-05 13:06:47,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:47,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416522924] [2021-06-05 13:06:47,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:47,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:06:47,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:47,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416522924] [2021-06-05 13:06:47,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416522924] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:47,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:47,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:06:47,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517661102] [2021-06-05 13:06:47,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:06:47,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:47,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:06:47,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:47,513 INFO L87 Difference]: Start difference. First operand 324 states and 741 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:06:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:47,573 INFO L93 Difference]: Finished difference Result 351 states and 762 transitions. [2021-06-05 13:06:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:06:47,573 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:06:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:47,573 INFO L225 Difference]: With dead ends: 351 [2021-06-05 13:06:47,573 INFO L226 Difference]: Without dead ends: 259 [2021-06-05 13:06:47,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:06:47,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-05 13:06:47,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 196. [2021-06-05 13:06:47,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 194 states have (on average 2.3195876288659796) internal successors, (450), 195 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:47,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 450 transitions. [2021-06-05 13:06:47,577 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 450 transitions. Word has length 16 [2021-06-05 13:06:47,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:47,577 INFO L482 AbstractCegarLoop]: Abstraction has 196 states and 450 transitions. [2021-06-05 13:06:47,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:06:47,577 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 450 transitions. [2021-06-05 13:06:47,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:06:47,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:47,578 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:47,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-05 13:06:47,578 INFO L430 AbstractCegarLoop]: === Iteration 15 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:47,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:47,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1726310969, now seen corresponding path program 1 times [2021-06-05 13:06:47,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:47,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542734506] [2021-06-05 13:06:47,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:06:47,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:47,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542734506] [2021-06-05 13:06:47,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542734506] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:47,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:47,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:06:47,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402507230] [2021-06-05 13:06:47,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:06:47,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:47,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:06:47,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:47,606 INFO L87 Difference]: Start difference. First operand 196 states and 450 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:06:47,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:47,658 INFO L93 Difference]: Finished difference Result 199 states and 425 transitions. [2021-06-05 13:06:47,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:06:47,659 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:06:47,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:47,659 INFO L225 Difference]: With dead ends: 199 [2021-06-05 13:06:47,659 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 13:06:47,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:06:47,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 13:06:47,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2021-06-05 13:06:47,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 125 states have (on average 2.248) internal successors, (281), 126 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:47,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 281 transitions. [2021-06-05 13:06:47,661 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 281 transitions. Word has length 16 [2021-06-05 13:06:47,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:47,662 INFO L482 AbstractCegarLoop]: Abstraction has 127 states and 281 transitions. [2021-06-05 13:06:47,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:06:47,662 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 281 transitions. [2021-06-05 13:06:47,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:06:47,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:47,662 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:47,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-05 13:06:47,662 INFO L430 AbstractCegarLoop]: === Iteration 16 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:47,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:47,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1129674176, now seen corresponding path program 1 times [2021-06-05 13:06:47,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:47,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778057547] [2021-06-05 13:06:47,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:47,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:06:47,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:47,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778057547] [2021-06-05 13:06:47,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778057547] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:47,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:47,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:06:47,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984064074] [2021-06-05 13:06:47,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:06:47,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:47,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:06:47,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:47,692 INFO L87 Difference]: Start difference. First operand 127 states and 281 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:06:47,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:47,732 INFO L93 Difference]: Finished difference Result 91 states and 170 transitions. [2021-06-05 13:06:47,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 13:06:47,732 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:06:47,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:47,732 INFO L225 Difference]: With dead ends: 91 [2021-06-05 13:06:47,733 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 13:06:47,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 13:06:47,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 13:06:47,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 13:06:47,733 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) [2021-06-05 13:06:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 13:06:47,733 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2021-06-05 13:06:47,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:47,733 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 13:06:47,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:06:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 13:06:47,733 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 13:06:47,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-05 13:06:47,734 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-06-05 13:06:47,734 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 13:06:47,734 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:06:47,734 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:06:47,734 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:06:47,734 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:06:47,734 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:06:47,735 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:06:47,735 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:06:47,735 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-06-05 13:06:47,735 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 27 transitions, 75 flow [2021-06-05 13:06:47,767 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1683 states, 1660 states have (on average 3.277710843373494) internal successors, (5441), 1682 states have internal predecessors, (5441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:47,769 INFO L276 IsEmpty]: Start isEmpty. Operand has 1683 states, 1660 states have (on average 3.277710843373494) internal successors, (5441), 1682 states have internal predecessors, (5441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:47,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-06-05 13:06:47,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:47,769 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-06-05 13:06:47,769 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:06:47,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:47,770 INFO L82 PathProgramCache]: Analyzing trace with hash 92537823, now seen corresponding path program 1 times [2021-06-05 13:06:47,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:47,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750902326] [2021-06-05 13:06:47,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:47,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:06:47,771 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:06:47,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:06:47,772 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:06:47,773 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 13:06:47,773 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 13:06:47,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-05 13:06:47,773 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-06-05 13:06:47,773 WARN L242 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 13:06:47,773 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-06-05 13:06:47,777 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,777 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,777 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,777 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,777 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,777 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,777 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,777 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,778 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,778 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,778 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,778 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,778 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,778 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,778 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,778 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,778 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,778 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,779 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,779 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,779 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,779 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,779 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,779 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,779 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,779 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,779 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,779 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,779 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,780 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,780 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,780 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,780 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,781 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,782 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,783 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:06:47,784 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 13:06:47,784 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 13:06:47,784 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:06:47,784 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:06:47,784 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:06:47,784 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:06:47,785 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:06:47,785 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:06:47,785 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:06:47,785 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:06:47,785 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-06-05 13:06:48,520 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13459 states, 13412 states have (on average 4.122949597375484) internal successors, (55297), 13458 states have internal predecessors, (55297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:48,546 INFO L276 IsEmpty]: Start isEmpty. Operand has 13459 states, 13412 states have (on average 4.122949597375484) internal successors, (55297), 13458 states have internal predecessors, (55297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:48,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 13:06:48,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:48,546 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:48,546 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:48,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:48,547 INFO L82 PathProgramCache]: Analyzing trace with hash 952955632, now seen corresponding path program 1 times [2021-06-05 13:06:48,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:48,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750676792] [2021-06-05 13:06:48,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:48,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:48,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:48,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750676792] [2021-06-05 13:06:48,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750676792] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:48,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:48,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:06:48,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856190717] [2021-06-05 13:06:48,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:06:48,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:48,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:06:48,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:48,579 INFO L87 Difference]: Start difference. First operand has 13459 states, 13412 states have (on average 4.122949597375484) internal successors, (55297), 13458 states have internal predecessors, (55297), 0 states have call successors, (0), 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, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:48,690 INFO L93 Difference]: Finished difference Result 19652 states and 79850 transitions. [2021-06-05 13:06:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:06:48,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-06-05 13:06:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:48,752 INFO L225 Difference]: With dead ends: 19652 [2021-06-05 13:06:48,752 INFO L226 Difference]: Without dead ends: 19374 [2021-06-05 13:06:48,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:48,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19374 states. [2021-06-05 13:06:49,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19374 to 16284. [2021-06-05 13:06:49,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16284 states, 16244 states have (on average 4.135249938438808) internal successors, (67173), 16283 states have internal predecessors, (67173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:49,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16284 states to 16284 states and 67173 transitions. [2021-06-05 13:06:49,440 INFO L78 Accepts]: Start accepts. Automaton has 16284 states and 67173 transitions. Word has length 7 [2021-06-05 13:06:49,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:49,440 INFO L482 AbstractCegarLoop]: Abstraction has 16284 states and 67173 transitions. [2021-06-05 13:06:49,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:49,441 INFO L276 IsEmpty]: Start isEmpty. Operand 16284 states and 67173 transitions. [2021-06-05 13:06:49,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:06:49,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:49,442 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:49,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-05 13:06:49,442 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:49,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:49,442 INFO L82 PathProgramCache]: Analyzing trace with hash 141049944, now seen corresponding path program 1 times [2021-06-05 13:06:49,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:49,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280276411] [2021-06-05 13:06:49,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:49,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:49,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:49,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280276411] [2021-06-05 13:06:49,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280276411] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:49,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:49,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:06:49,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6976337] [2021-06-05 13:06:49,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:06:49,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:49,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:06:49,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:49,450 INFO L87 Difference]: Start difference. First operand 16284 states and 67173 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:49,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:49,672 INFO L93 Difference]: Finished difference Result 22590 states and 91851 transitions. [2021-06-05 13:06:49,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:06:49,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 13:06:49,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:49,799 INFO L225 Difference]: With dead ends: 22590 [2021-06-05 13:06:49,799 INFO L226 Difference]: Without dead ends: 22440 [2021-06-05 13:06:49,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:49,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22440 states. [2021-06-05 13:06:50,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22440 to 18864. [2021-06-05 13:06:50,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18864 states, 18825 states have (on average 4.135298804780876) internal successors, (77847), 18863 states have internal predecessors, (77847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:50,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18864 states to 18864 states and 77847 transitions. [2021-06-05 13:06:50,392 INFO L78 Accepts]: Start accepts. Automaton has 18864 states and 77847 transitions. Word has length 8 [2021-06-05 13:06:50,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:50,392 INFO L482 AbstractCegarLoop]: Abstraction has 18864 states and 77847 transitions. [2021-06-05 13:06:50,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:50,393 INFO L276 IsEmpty]: Start isEmpty. Operand 18864 states and 77847 transitions. [2021-06-05 13:06:50,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 13:06:50,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:50,394 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:50,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-05 13:06:50,394 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:50,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:50,394 INFO L82 PathProgramCache]: Analyzing trace with hash 549962088, now seen corresponding path program 1 times [2021-06-05 13:06:50,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:50,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608177734] [2021-06-05 13:06:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:06:50,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:50,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608177734] [2021-06-05 13:06:50,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608177734] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:50,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:50,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:06:50,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023444391] [2021-06-05 13:06:50,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:06:50,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:50,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:06:50,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:50,402 INFO L87 Difference]: Start difference. First operand 18864 states and 77847 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:50,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:50,635 INFO L93 Difference]: Finished difference Result 24868 states and 100763 transitions. [2021-06-05 13:06:50,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:06:50,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-05 13:06:50,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:50,702 INFO L225 Difference]: With dead ends: 24868 [2021-06-05 13:06:50,702 INFO L226 Difference]: Without dead ends: 24728 [2021-06-05 13:06:50,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:50,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24728 states. [2021-06-05 13:06:51,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24728 to 20864. [2021-06-05 13:06:51,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20864 states, 20826 states have (on average 4.119033899932776) internal successors, (85783), 20863 states have internal predecessors, (85783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:51,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20864 states to 20864 states and 85783 transitions. [2021-06-05 13:06:51,412 INFO L78 Accepts]: Start accepts. Automaton has 20864 states and 85783 transitions. Word has length 9 [2021-06-05 13:06:51,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:51,412 INFO L482 AbstractCegarLoop]: Abstraction has 20864 states and 85783 transitions. [2021-06-05 13:06:51,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:51,413 INFO L276 IsEmpty]: Start isEmpty. Operand 20864 states and 85783 transitions. [2021-06-05 13:06:51,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:06:51,414 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:51,414 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:51,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-05 13:06:51,416 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:51,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:51,416 INFO L82 PathProgramCache]: Analyzing trace with hash 804174590, now seen corresponding path program 1 times [2021-06-05 13:06:51,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:51,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170401570] [2021-06-05 13:06:51,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:51,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:06:51,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:51,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170401570] [2021-06-05 13:06:51,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170401570] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:51,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:51,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:06:51,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094076413] [2021-06-05 13:06:51,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:06:51,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:51,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:06:51,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:51,432 INFO L87 Difference]: Start difference. First operand 20864 states and 85783 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:51,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:51,723 INFO L93 Difference]: Finished difference Result 25664 states and 103119 transitions. [2021-06-05 13:06:51,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:06:51,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 13:06:51,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:51,786 INFO L225 Difference]: With dead ends: 25664 [2021-06-05 13:06:51,787 INFO L226 Difference]: Without dead ends: 25536 [2021-06-05 13:06:51,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25536 states. [2021-06-05 13:06:52,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25536 to 21864. [2021-06-05 13:06:52,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21864 states, 21828 states have (on average 4.08076782114715) internal successors, (89075), 21863 states have internal predecessors, (89075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:52,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21864 states to 21864 states and 89075 transitions. [2021-06-05 13:06:52,461 INFO L78 Accepts]: Start accepts. Automaton has 21864 states and 89075 transitions. Word has length 10 [2021-06-05 13:06:52,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:52,461 INFO L482 AbstractCegarLoop]: Abstraction has 21864 states and 89075 transitions. [2021-06-05 13:06:52,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:52,461 INFO L276 IsEmpty]: Start isEmpty. Operand 21864 states and 89075 transitions. [2021-06-05 13:06:52,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:06:52,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:52,463 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:52,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-05 13:06:52,463 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:52,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:52,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1400865855, now seen corresponding path program 1 times [2021-06-05 13:06:52,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:52,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737357491] [2021-06-05 13:06:52,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:52,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:52,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:52,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737357491] [2021-06-05 13:06:52,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737357491] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:52,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:52,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:52,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248945443] [2021-06-05 13:06:52,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:52,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:52,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:52,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:52,487 INFO L87 Difference]: Start difference. First operand 21864 states and 89075 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:52,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:52,747 INFO L93 Difference]: Finished difference Result 38802 states and 151963 transitions. [2021-06-05 13:06:52,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:52,747 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:06:52,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:52,850 INFO L225 Difference]: With dead ends: 38802 [2021-06-05 13:06:52,851 INFO L226 Difference]: Without dead ends: 38488 [2021-06-05 13:06:52,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:53,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38488 states. [2021-06-05 13:06:53,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38488 to 24398. [2021-06-05 13:06:53,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24398 states, 24362 states have (on average 4.135908381906248) internal successors, (100759), 24397 states have internal predecessors, (100759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24398 states to 24398 states and 100759 transitions. [2021-06-05 13:06:53,705 INFO L78 Accepts]: Start accepts. Automaton has 24398 states and 100759 transitions. Word has length 11 [2021-06-05 13:06:53,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:53,705 INFO L482 AbstractCegarLoop]: Abstraction has 24398 states and 100759 transitions. [2021-06-05 13:06:53,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:53,705 INFO L276 IsEmpty]: Start isEmpty. Operand 24398 states and 100759 transitions. [2021-06-05 13:06:53,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:06:53,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:53,707 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:53,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-05 13:06:53,707 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:53,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:53,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1335883295, now seen corresponding path program 2 times [2021-06-05 13:06:53,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:53,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308731575] [2021-06-05 13:06:53,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:06:53,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:53,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308731575] [2021-06-05 13:06:53,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308731575] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:53,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:53,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:06:53,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619092184] [2021-06-05 13:06:53,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:06:53,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:53,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:06:53,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:53,716 INFO L87 Difference]: Start difference. First operand 24398 states and 100759 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:53,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:53,995 INFO L93 Difference]: Finished difference Result 9368 states and 33520 transitions. [2021-06-05 13:06:53,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:06:53,995 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:06:53,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:54,023 INFO L225 Difference]: With dead ends: 9368 [2021-06-05 13:06:54,024 INFO L226 Difference]: Without dead ends: 9338 [2021-06-05 13:06:54,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:06:54,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9338 states. [2021-06-05 13:06:54,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9338 to 9338. [2021-06-05 13:06:54,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9338 states, 9303 states have (on average 3.5893797699666776) internal successors, (33392), 9337 states have internal predecessors, (33392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:54,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9338 states to 9338 states and 33392 transitions. [2021-06-05 13:06:54,187 INFO L78 Accepts]: Start accepts. Automaton has 9338 states and 33392 transitions. Word has length 11 [2021-06-05 13:06:54,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:54,187 INFO L482 AbstractCegarLoop]: Abstraction has 9338 states and 33392 transitions. [2021-06-05 13:06:54,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:54,187 INFO L276 IsEmpty]: Start isEmpty. Operand 9338 states and 33392 transitions. [2021-06-05 13:06:54,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:06:54,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:54,188 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:54,188 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-05 13:06:54,188 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:54,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:54,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1540654737, now seen corresponding path program 1 times [2021-06-05 13:06:54,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:54,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841561332] [2021-06-05 13:06:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:54,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:54,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841561332] [2021-06-05 13:06:54,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841561332] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:54,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:54,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:54,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651914300] [2021-06-05 13:06:54,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:54,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:54,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:54,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:54,205 INFO L87 Difference]: Start difference. First operand 9338 states and 33392 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:54,319 INFO L93 Difference]: Finished difference Result 16546 states and 57127 transitions. [2021-06-05 13:06:54,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:54,320 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:06:54,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:54,352 INFO L225 Difference]: With dead ends: 16546 [2021-06-05 13:06:54,352 INFO L226 Difference]: Without dead ends: 16329 [2021-06-05 13:06:54,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:54,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16329 states. [2021-06-05 13:06:54,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16329 to 9435. [2021-06-05 13:06:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9435 states, 9401 states have (on average 3.6195085629188384) internal successors, (34027), 9434 states have internal predecessors, (34027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9435 states to 9435 states and 34027 transitions. [2021-06-05 13:06:54,674 INFO L78 Accepts]: Start accepts. Automaton has 9435 states and 34027 transitions. Word has length 11 [2021-06-05 13:06:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:54,674 INFO L482 AbstractCegarLoop]: Abstraction has 9435 states and 34027 transitions. [2021-06-05 13:06:54,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 9435 states and 34027 transitions. [2021-06-05 13:06:54,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:06:54,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:54,675 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:54,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-05 13:06:54,676 INFO L430 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:54,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:54,676 INFO L82 PathProgramCache]: Analyzing trace with hash 492406963, now seen corresponding path program 1 times [2021-06-05 13:06:54,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:54,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649674072] [2021-06-05 13:06:54,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:54,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:54,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:54,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649674072] [2021-06-05 13:06:54,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649674072] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:54,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:54,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:54,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015626484] [2021-06-05 13:06:54,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:54,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:54,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:54,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:54,692 INFO L87 Difference]: Start difference. First operand 9435 states and 34027 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:54,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:54,819 INFO L93 Difference]: Finished difference Result 17027 states and 59322 transitions. [2021-06-05 13:06:54,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:54,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:06:54,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:54,851 INFO L225 Difference]: With dead ends: 17027 [2021-06-05 13:06:54,852 INFO L226 Difference]: Without dead ends: 16835 [2021-06-05 13:06:54,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:54,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16835 states. [2021-06-05 13:06:55,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16835 to 9849. [2021-06-05 13:06:55,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9849 states, 9815 states have (on average 3.6466632705043303) internal successors, (35792), 9848 states have internal predecessors, (35792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:55,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9849 states to 9849 states and 35792 transitions. [2021-06-05 13:06:55,073 INFO L78 Accepts]: Start accepts. Automaton has 9849 states and 35792 transitions. Word has length 12 [2021-06-05 13:06:55,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:55,073 INFO L482 AbstractCegarLoop]: Abstraction has 9849 states and 35792 transitions. [2021-06-05 13:06:55,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:55,073 INFO L276 IsEmpty]: Start isEmpty. Operand 9849 states and 35792 transitions. [2021-06-05 13:06:55,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:06:55,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:55,074 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:55,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-05 13:06:55,074 INFO L430 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:55,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:55,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1723674168, now seen corresponding path program 1 times [2021-06-05 13:06:55,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:55,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994148090] [2021-06-05 13:06:55,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:06:55,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:55,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994148090] [2021-06-05 13:06:55,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994148090] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:55,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:55,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:55,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688389858] [2021-06-05 13:06:55,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:55,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:55,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:55,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:55,089 INFO L87 Difference]: Start difference. First operand 9849 states and 35792 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:55,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:55,261 INFO L93 Difference]: Finished difference Result 17131 states and 59960 transitions. [2021-06-05 13:06:55,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:55,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:06:55,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:55,294 INFO L225 Difference]: With dead ends: 17131 [2021-06-05 13:06:55,295 INFO L226 Difference]: Without dead ends: 16939 [2021-06-05 13:06:55,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:55,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16939 states. [2021-06-05 13:06:55,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16939 to 10081. [2021-06-05 13:06:55,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10081 states, 10048 states have (on average 3.65843949044586) internal successors, (36760), 10080 states have internal predecessors, (36760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:55,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10081 states to 10081 states and 36760 transitions. [2021-06-05 13:06:55,572 INFO L78 Accepts]: Start accepts. Automaton has 10081 states and 36760 transitions. Word has length 12 [2021-06-05 13:06:55,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:55,572 INFO L482 AbstractCegarLoop]: Abstraction has 10081 states and 36760 transitions. [2021-06-05 13:06:55,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:55,573 INFO L276 IsEmpty]: Start isEmpty. Operand 10081 states and 36760 transitions. [2021-06-05 13:06:55,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:06:55,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:55,574 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:55,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-05 13:06:55,574 INFO L430 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:55,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:55,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1379465051, now seen corresponding path program 1 times [2021-06-05 13:06:55,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:55,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239113398] [2021-06-05 13:06:55,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:55,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:06:55,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:55,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239113398] [2021-06-05 13:06:55,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239113398] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:55,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:55,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:55,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540686065] [2021-06-05 13:06:55,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:55,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:55,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:55,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:55,595 INFO L87 Difference]: Start difference. First operand 10081 states and 36760 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:55,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:55,727 INFO L93 Difference]: Finished difference Result 16933 states and 59405 transitions. [2021-06-05 13:06:55,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:55,728 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:06:55,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:55,761 INFO L225 Difference]: With dead ends: 16933 [2021-06-05 13:06:55,761 INFO L226 Difference]: Without dead ends: 16727 [2021-06-05 13:06:55,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:55,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16727 states. [2021-06-05 13:06:56,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16727 to 10169. [2021-06-05 13:06:56,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10169 states, 10137 states have (on average 3.6744598993785145) internal successors, (37248), 10168 states have internal predecessors, (37248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10169 states to 10169 states and 37248 transitions. [2021-06-05 13:06:56,042 INFO L78 Accepts]: Start accepts. Automaton has 10169 states and 37248 transitions. Word has length 12 [2021-06-05 13:06:56,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:56,042 INFO L482 AbstractCegarLoop]: Abstraction has 10169 states and 37248 transitions. [2021-06-05 13:06:56,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:56,043 INFO L276 IsEmpty]: Start isEmpty. Operand 10169 states and 37248 transitions. [2021-06-05 13:06:56,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:06:56,043 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:56,043 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:56,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-05 13:06:56,044 INFO L430 AbstractCegarLoop]: === Iteration 11 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:56,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:56,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1379249570, now seen corresponding path program 1 times [2021-06-05 13:06:56,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:56,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495092877] [2021-06-05 13:06:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:56,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:06:56,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:56,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495092877] [2021-06-05 13:06:56,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495092877] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:56,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:56,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:56,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611827947] [2021-06-05 13:06:56,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:56,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:56,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:56,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:56,058 INFO L87 Difference]: Start difference. First operand 10169 states and 37248 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:56,222 INFO L93 Difference]: Finished difference Result 17271 states and 60491 transitions. [2021-06-05 13:06:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:56,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:06:56,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:56,254 INFO L225 Difference]: With dead ends: 17271 [2021-06-05 13:06:56,254 INFO L226 Difference]: Without dead ends: 17065 [2021-06-05 13:06:56,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:56,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17065 states. [2021-06-05 13:06:56,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17065 to 10364. [2021-06-05 13:06:56,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10364 states, 10333 states have (on average 3.6658279299332235) internal successors, (37879), 10363 states have internal predecessors, (37879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10364 states to 10364 states and 37879 transitions. [2021-06-05 13:06:56,485 INFO L78 Accepts]: Start accepts. Automaton has 10364 states and 37879 transitions. Word has length 12 [2021-06-05 13:06:56,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:56,485 INFO L482 AbstractCegarLoop]: Abstraction has 10364 states and 37879 transitions. [2021-06-05 13:06:56,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 10364 states and 37879 transitions. [2021-06-05 13:06:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:06:56,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:56,486 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:56,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-06-05 13:06:56,486 INFO L430 AbstractCegarLoop]: === Iteration 12 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:56,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:56,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1885085127, now seen corresponding path program 1 times [2021-06-05 13:06:56,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:56,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099531033] [2021-06-05 13:06:56,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:06:56,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:56,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099531033] [2021-06-05 13:06:56,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099531033] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:56,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:56,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:56,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682572669] [2021-06-05 13:06:56,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:56,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:56,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:56,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:56,502 INFO L87 Difference]: Start difference. First operand 10364 states and 37879 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:56,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:56,623 INFO L93 Difference]: Finished difference Result 17252 states and 60269 transitions. [2021-06-05 13:06:56,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:56,624 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 13:06:56,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:56,656 INFO L225 Difference]: With dead ends: 17252 [2021-06-05 13:06:56,657 INFO L226 Difference]: Without dead ends: 17026 [2021-06-05 13:06:56,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:56,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17026 states. [2021-06-05 13:06:56,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17026 to 10606. [2021-06-05 13:06:56,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10606 states, 10575 states have (on average 3.640189125295508) internal successors, (38495), 10605 states have internal predecessors, (38495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:56,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10606 states to 10606 states and 38495 transitions. [2021-06-05 13:06:56,883 INFO L78 Accepts]: Start accepts. Automaton has 10606 states and 38495 transitions. Word has length 13 [2021-06-05 13:06:56,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:56,883 INFO L482 AbstractCegarLoop]: Abstraction has 10606 states and 38495 transitions. [2021-06-05 13:06:56,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:56,884 INFO L276 IsEmpty]: Start isEmpty. Operand 10606 states and 38495 transitions. [2021-06-05 13:06:56,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:06:56,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:56,885 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:56,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-05 13:06:56,885 INFO L430 AbstractCegarLoop]: === Iteration 13 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:56,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:56,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1954923196, now seen corresponding path program 1 times [2021-06-05 13:06:56,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:56,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615113412] [2021-06-05 13:06:56,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:56,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:06:56,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:56,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615113412] [2021-06-05 13:06:56,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615113412] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:56,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:56,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:56,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770794025] [2021-06-05 13:06:56,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:56,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:56,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:56,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:56,899 INFO L87 Difference]: Start difference. First operand 10606 states and 38495 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:57,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:57,055 INFO L93 Difference]: Finished difference Result 17258 states and 59809 transitions. [2021-06-05 13:06:57,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:57,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 13:06:57,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:57,087 INFO L225 Difference]: With dead ends: 17258 [2021-06-05 13:06:57,087 INFO L226 Difference]: Without dead ends: 17032 [2021-06-05 13:06:57,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:57,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17032 states. [2021-06-05 13:06:57,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17032 to 10702. [2021-06-05 13:06:57,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10702 states, 10671 states have (on average 3.6049105051073003) internal successors, (38468), 10701 states have internal predecessors, (38468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:57,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10702 states to 10702 states and 38468 transitions. [2021-06-05 13:06:57,318 INFO L78 Accepts]: Start accepts. Automaton has 10702 states and 38468 transitions. Word has length 13 [2021-06-05 13:06:57,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:57,318 INFO L482 AbstractCegarLoop]: Abstraction has 10702 states and 38468 transitions. [2021-06-05 13:06:57,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:57,318 INFO L276 IsEmpty]: Start isEmpty. Operand 10702 states and 38468 transitions. [2021-06-05 13:06:57,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:06:57,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:57,319 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:57,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-06-05 13:06:57,320 INFO L430 AbstractCegarLoop]: === Iteration 14 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:57,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:57,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1754342774, now seen corresponding path program 1 times [2021-06-05 13:06:57,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:57,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635856497] [2021-06-05 13:06:57,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:57,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:06:57,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:57,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635856497] [2021-06-05 13:06:57,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635856497] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:57,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:57,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:57,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081247491] [2021-06-05 13:06:57,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:57,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:57,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:57,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:57,335 INFO L87 Difference]: Start difference. First operand 10702 states and 38468 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:57,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:57,444 INFO L93 Difference]: Finished difference Result 16924 states and 57997 transitions. [2021-06-05 13:06:57,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:57,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 13:06:57,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:57,474 INFO L225 Difference]: With dead ends: 16924 [2021-06-05 13:06:57,474 INFO L226 Difference]: Without dead ends: 16698 [2021-06-05 13:06:57,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:57,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16698 states. [2021-06-05 13:06:57,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16698 to 10604. [2021-06-05 13:06:57,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10604 states, 10575 states have (on average 3.5610401891252956) internal successors, (37658), 10603 states have internal predecessors, (37658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:57,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10604 states to 10604 states and 37658 transitions. [2021-06-05 13:06:57,705 INFO L78 Accepts]: Start accepts. Automaton has 10604 states and 37658 transitions. Word has length 13 [2021-06-05 13:06:57,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:57,705 INFO L482 AbstractCegarLoop]: Abstraction has 10604 states and 37658 transitions. [2021-06-05 13:06:57,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:57,705 INFO L276 IsEmpty]: Start isEmpty. Operand 10604 states and 37658 transitions. [2021-06-05 13:06:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:06:57,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:57,707 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:57,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-06-05 13:06:57,707 INFO L430 AbstractCegarLoop]: === Iteration 15 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:57,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:57,707 INFO L82 PathProgramCache]: Analyzing trace with hash -162786407, now seen corresponding path program 1 times [2021-06-05 13:06:57,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:57,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875278087] [2021-06-05 13:06:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:57,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:06:57,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:57,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875278087] [2021-06-05 13:06:57,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875278087] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:57,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:57,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:57,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36767664] [2021-06-05 13:06:57,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:57,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:57,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:57,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:57,734 INFO L87 Difference]: Start difference. First operand 10604 states and 37658 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:57,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:57,865 INFO L93 Difference]: Finished difference Result 15962 states and 53962 transitions. [2021-06-05 13:06:57,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:57,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 13:06:57,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:57,896 INFO L225 Difference]: With dead ends: 15962 [2021-06-05 13:06:57,896 INFO L226 Difference]: Without dead ends: 15736 [2021-06-05 13:06:57,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:57,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15736 states. [2021-06-05 13:06:58,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15736 to 10513. [2021-06-05 13:06:58,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10513 states, 10486 states have (on average 3.5275605569330537) internal successors, (36990), 10512 states have internal predecessors, (36990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:58,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10513 states to 10513 states and 36990 transitions. [2021-06-05 13:06:58,165 INFO L78 Accepts]: Start accepts. Automaton has 10513 states and 36990 transitions. Word has length 13 [2021-06-05 13:06:58,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:58,165 INFO L482 AbstractCegarLoop]: Abstraction has 10513 states and 36990 transitions. [2021-06-05 13:06:58,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:58,165 INFO L276 IsEmpty]: Start isEmpty. Operand 10513 states and 36990 transitions. [2021-06-05 13:06:58,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:06:58,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:58,167 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:58,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-05 13:06:58,167 INFO L430 AbstractCegarLoop]: === Iteration 16 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:58,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:58,167 INFO L82 PathProgramCache]: Analyzing trace with hash -162570926, now seen corresponding path program 1 times [2021-06-05 13:06:58,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:58,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944856828] [2021-06-05 13:06:58,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:58,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:06:58,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:58,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944856828] [2021-06-05 13:06:58,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944856828] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:58,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:58,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:58,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659068643] [2021-06-05 13:06:58,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:58,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:58,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:58,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:58,182 INFO L87 Difference]: Start difference. First operand 10513 states and 36990 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:58,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:58,303 INFO L93 Difference]: Finished difference Result 16030 states and 53631 transitions. [2021-06-05 13:06:58,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:58,303 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 13:06:58,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:58,332 INFO L225 Difference]: With dead ends: 16030 [2021-06-05 13:06:58,332 INFO L226 Difference]: Without dead ends: 15804 [2021-06-05 13:06:58,333 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15804 states. [2021-06-05 13:06:58,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15804 to 10491. [2021-06-05 13:06:58,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10491 states, 10466 states have (on average 3.478597362889356) internal successors, (36407), 10490 states have internal predecessors, (36407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:58,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10491 states to 10491 states and 36407 transitions. [2021-06-05 13:06:58,605 INFO L78 Accepts]: Start accepts. Automaton has 10491 states and 36407 transitions. Word has length 13 [2021-06-05 13:06:58,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:58,605 INFO L482 AbstractCegarLoop]: Abstraction has 10491 states and 36407 transitions. [2021-06-05 13:06:58,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 10491 states and 36407 transitions. [2021-06-05 13:06:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:06:58,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:58,606 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:58,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-05 13:06:58,607 INFO L430 AbstractCegarLoop]: === Iteration 17 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:58,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:58,607 INFO L82 PathProgramCache]: Analyzing trace with hash -163001888, now seen corresponding path program 1 times [2021-06-05 13:06:58,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:58,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547008747] [2021-06-05 13:06:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:58,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:06:58,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:58,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547008747] [2021-06-05 13:06:58,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547008747] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:58,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:58,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:06:58,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564868264] [2021-06-05 13:06:58,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:06:58,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:58,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:06:58,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:06:58,624 INFO L87 Difference]: Start difference. First operand 10491 states and 36407 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:58,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:58,753 INFO L93 Difference]: Finished difference Result 15882 states and 52454 transitions. [2021-06-05 13:06:58,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:06:58,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 13:06:58,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:58,782 INFO L225 Difference]: With dead ends: 15882 [2021-06-05 13:06:58,782 INFO L226 Difference]: Without dead ends: 15652 [2021-06-05 13:06:58,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:58,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15652 states. [2021-06-05 13:06:59,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15652 to 10372. [2021-06-05 13:06:59,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10372 states, 10349 states have (on average 3.415209198956421) internal successors, (35344), 10371 states have internal predecessors, (35344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:59,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10372 states to 10372 states and 35344 transitions. [2021-06-05 13:06:59,042 INFO L78 Accepts]: Start accepts. Automaton has 10372 states and 35344 transitions. Word has length 13 [2021-06-05 13:06:59,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:59,042 INFO L482 AbstractCegarLoop]: Abstraction has 10372 states and 35344 transitions. [2021-06-05 13:06:59,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:59,042 INFO L276 IsEmpty]: Start isEmpty. Operand 10372 states and 35344 transitions. [2021-06-05 13:06:59,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:06:59,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:59,045 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:59,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-06-05 13:06:59,045 INFO L430 AbstractCegarLoop]: === Iteration 18 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:59,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:59,045 INFO L82 PathProgramCache]: Analyzing trace with hash 132899251, now seen corresponding path program 1 times [2021-06-05 13:06:59,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:59,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398384683] [2021-06-05 13:06:59,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:59,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:59,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:59,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398384683] [2021-06-05 13:06:59,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398384683] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:59,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:59,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:06:59,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785232176] [2021-06-05 13:06:59,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:06:59,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:59,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:06:59,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:59,074 INFO L87 Difference]: Start difference. First operand 10372 states and 35344 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:06:59,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:59,268 INFO L93 Difference]: Finished difference Result 16633 states and 53760 transitions. [2021-06-05 13:06:59,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:06:59,269 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:06:59,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:59,298 INFO L225 Difference]: With dead ends: 16633 [2021-06-05 13:06:59,298 INFO L226 Difference]: Without dead ends: 16393 [2021-06-05 13:06:59,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:06:59,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16393 states. [2021-06-05 13:06:59,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16393 to 10107. [2021-06-05 13:06:59,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10107 states, 10084 states have (on average 3.4073780245934153) internal successors, (34360), 10106 states have internal predecessors, (34360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:06:59,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10107 states to 10107 states and 34360 transitions. [2021-06-05 13:06:59,567 INFO L78 Accepts]: Start accepts. Automaton has 10107 states and 34360 transitions. Word has length 16 [2021-06-05 13:06:59,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:06:59,567 INFO L482 AbstractCegarLoop]: Abstraction has 10107 states and 34360 transitions. [2021-06-05 13:06:59,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:06:59,567 INFO L276 IsEmpty]: Start isEmpty. Operand 10107 states and 34360 transitions. [2021-06-05 13:06:59,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:06:59,569 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:06:59,569 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:06:59,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-06-05 13:06:59,569 INFO L430 AbstractCegarLoop]: === Iteration 19 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:06:59,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:06:59,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1324942823, now seen corresponding path program 1 times [2021-06-05 13:06:59,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:06:59,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278033036] [2021-06-05 13:06:59,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:06:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:06:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:06:59,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:06:59,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278033036] [2021-06-05 13:06:59,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278033036] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:06:59,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:06:59,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:06:59,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084666244] [2021-06-05 13:06:59,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:06:59,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:06:59,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:06:59,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:06:59,611 INFO L87 Difference]: Start difference. First operand 10107 states and 34360 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:06:59,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:06:59,807 INFO L93 Difference]: Finished difference Result 16362 states and 52734 transitions. [2021-06-05 13:06:59,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:06:59,808 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:06:59,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:06:59,836 INFO L225 Difference]: With dead ends: 16362 [2021-06-05 13:06:59,837 INFO L226 Difference]: Without dead ends: 16094 [2021-06-05 13:06:59,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 50.0ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:06:59,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16094 states. [2021-06-05 13:07:00,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16094 to 9700. [2021-06-05 13:07:00,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9700 states, 9678 states have (on average 3.4031824757181237) internal successors, (32936), 9699 states have internal predecessors, (32936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:00,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9700 states to 9700 states and 32936 transitions. [2021-06-05 13:07:00,091 INFO L78 Accepts]: Start accepts. Automaton has 9700 states and 32936 transitions. Word has length 16 [2021-06-05 13:07:00,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:00,091 INFO L482 AbstractCegarLoop]: Abstraction has 9700 states and 32936 transitions. [2021-06-05 13:07:00,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:07:00,091 INFO L276 IsEmpty]: Start isEmpty. Operand 9700 states and 32936 transitions. [2021-06-05 13:07:00,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:07:00,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:00,093 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:00,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-06-05 13:07:00,093 INFO L430 AbstractCegarLoop]: === Iteration 20 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:00,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:00,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1598844230, now seen corresponding path program 1 times [2021-06-05 13:07:00,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:00,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896560978] [2021-06-05 13:07:00,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:00,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:00,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896560978] [2021-06-05 13:07:00,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896560978] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:00,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:00,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:00,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347167611] [2021-06-05 13:07:00,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:00,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:00,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:00,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:00,136 INFO L87 Difference]: Start difference. First operand 9700 states and 32936 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:07:00,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:00,323 INFO L93 Difference]: Finished difference Result 15766 states and 50698 transitions. [2021-06-05 13:07:00,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:00,323 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:07:00,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:00,350 INFO L225 Difference]: With dead ends: 15766 [2021-06-05 13:07:00,351 INFO L226 Difference]: Without dead ends: 15526 [2021-06-05 13:07:00,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:07:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15526 states. [2021-06-05 13:07:00,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15526 to 9420. [2021-06-05 13:07:00,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9420 states, 9398 states have (on average 3.3940200042562245) internal successors, (31897), 9419 states have internal predecessors, (31897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:00,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9420 states to 9420 states and 31897 transitions. [2021-06-05 13:07:00,590 INFO L78 Accepts]: Start accepts. Automaton has 9420 states and 31897 transitions. Word has length 16 [2021-06-05 13:07:00,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:00,591 INFO L482 AbstractCegarLoop]: Abstraction has 9420 states and 31897 transitions. [2021-06-05 13:07:00,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:07:00,591 INFO L276 IsEmpty]: Start isEmpty. Operand 9420 states and 31897 transitions. [2021-06-05 13:07:00,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:07:00,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:00,593 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:00,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-06-05 13:07:00,593 INFO L430 AbstractCegarLoop]: === Iteration 21 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:00,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:00,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1257140915, now seen corresponding path program 1 times [2021-06-05 13:07:00,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:00,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469999459] [2021-06-05 13:07:00,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:00,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:00,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469999459] [2021-06-05 13:07:00,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469999459] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:00,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:00,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:00,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129800216] [2021-06-05 13:07:00,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:00,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:00,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:00,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:00,624 INFO L87 Difference]: Start difference. First operand 9420 states and 31897 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:07:00,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:00,816 INFO L93 Difference]: Finished difference Result 15174 states and 48727 transitions. [2021-06-05 13:07:00,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:00,816 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:07:00,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:00,842 INFO L225 Difference]: With dead ends: 15174 [2021-06-05 13:07:00,842 INFO L226 Difference]: Without dead ends: 14906 [2021-06-05 13:07:00,842 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:07:00,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14906 states. [2021-06-05 13:07:01,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14906 to 9013. [2021-06-05 13:07:01,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9013 states, 8992 states have (on average 3.3889012455516014) internal successors, (30473), 9012 states have internal predecessors, (30473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9013 states to 9013 states and 30473 transitions. [2021-06-05 13:07:01,071 INFO L78 Accepts]: Start accepts. Automaton has 9013 states and 30473 transitions. Word has length 16 [2021-06-05 13:07:01,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:01,071 INFO L482 AbstractCegarLoop]: Abstraction has 9013 states and 30473 transitions. [2021-06-05 13:07:01,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:07:01,071 INFO L276 IsEmpty]: Start isEmpty. Operand 9013 states and 30473 transitions. [2021-06-05 13:07:01,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:07:01,073 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:01,073 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:01,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-05 13:07:01,074 INFO L430 AbstractCegarLoop]: === Iteration 22 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:01,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:01,074 INFO L82 PathProgramCache]: Analyzing trace with hash -324631072, now seen corresponding path program 1 times [2021-06-05 13:07:01,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:01,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090315485] [2021-06-05 13:07:01,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:01,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:01,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090315485] [2021-06-05 13:07:01,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090315485] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:01,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:01,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:01,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437775279] [2021-06-05 13:07:01,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:01,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:01,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:01,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:01,109 INFO L87 Difference]: Start difference. First operand 9013 states and 30473 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:07:01,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:01,331 INFO L93 Difference]: Finished difference Result 14563 states and 46636 transitions. [2021-06-05 13:07:01,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:01,333 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:07:01,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:01,358 INFO L225 Difference]: With dead ends: 14563 [2021-06-05 13:07:01,358 INFO L226 Difference]: Without dead ends: 14323 [2021-06-05 13:07:01,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:07:01,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14323 states. [2021-06-05 13:07:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14323 to 8733. [2021-06-05 13:07:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8733 states, 8712 states have (on average 3.378558310376492) internal successors, (29434), 8732 states have internal predecessors, (29434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:01,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8733 states to 8733 states and 29434 transitions. [2021-06-05 13:07:01,579 INFO L78 Accepts]: Start accepts. Automaton has 8733 states and 29434 transitions. Word has length 16 [2021-06-05 13:07:01,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:01,579 INFO L482 AbstractCegarLoop]: Abstraction has 8733 states and 29434 transitions. [2021-06-05 13:07:01,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:07:01,579 INFO L276 IsEmpty]: Start isEmpty. Operand 8733 states and 29434 transitions. [2021-06-05 13:07:01,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:07:01,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:01,581 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:01,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-06-05 13:07:01,581 INFO L430 AbstractCegarLoop]: === Iteration 23 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:01,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:01,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1114351079, now seen corresponding path program 1 times [2021-06-05 13:07:01,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:01,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201081409] [2021-06-05 13:07:01,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:01,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:01,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:01,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201081409] [2021-06-05 13:07:01,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201081409] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:01,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:01,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:01,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600059020] [2021-06-05 13:07:01,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:01,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:01,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:01,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:01,606 INFO L87 Difference]: Start difference. First operand 8733 states and 29434 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:07:01,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:01,809 INFO L93 Difference]: Finished difference Result 14285 states and 45591 transitions. [2021-06-05 13:07:01,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:01,809 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:07:01,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:01,833 INFO L225 Difference]: With dead ends: 14285 [2021-06-05 13:07:01,833 INFO L226 Difference]: Without dead ends: 14010 [2021-06-05 13:07:01,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:07:01,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14010 states. [2021-06-05 13:07:02,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14010 to 8307. [2021-06-05 13:07:02,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8307 states, 8287 states have (on average 3.3733558585736696) internal successors, (27955), 8306 states have internal predecessors, (27955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:02,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8307 states to 8307 states and 27955 transitions. [2021-06-05 13:07:02,044 INFO L78 Accepts]: Start accepts. Automaton has 8307 states and 27955 transitions. Word has length 16 [2021-06-05 13:07:02,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:02,044 INFO L482 AbstractCegarLoop]: Abstraction has 8307 states and 27955 transitions. [2021-06-05 13:07:02,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:07:02,044 INFO L276 IsEmpty]: Start isEmpty. Operand 8307 states and 27955 transitions. [2021-06-05 13:07:02,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:02,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:02,046 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:02,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-06-05 13:07:02,046 INFO L430 AbstractCegarLoop]: === Iteration 24 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:02,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:02,047 INFO L82 PathProgramCache]: Analyzing trace with hash 270662139, now seen corresponding path program 1 times [2021-06-05 13:07:02,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:02,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307044479] [2021-06-05 13:07:02,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:02,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:07:02,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:02,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307044479] [2021-06-05 13:07:02,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307044479] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:02,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:02,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:02,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042854581] [2021-06-05 13:07:02,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:02,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:02,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:02,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:02,081 INFO L87 Difference]: Start difference. First operand 8307 states and 27955 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:02,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:02,281 INFO L93 Difference]: Finished difference Result 13912 states and 44209 transitions. [2021-06-05 13:07:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:02,282 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:02,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:02,303 INFO L225 Difference]: With dead ends: 13912 [2021-06-05 13:07:02,303 INFO L226 Difference]: Without dead ends: 13668 [2021-06-05 13:07:02,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:07:02,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13668 states. [2021-06-05 13:07:02,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13668 to 8145. [2021-06-05 13:07:02,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8145 states, 8125 states have (on average 3.355323076923077) internal successors, (27262), 8144 states have internal predecessors, (27262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:02,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8145 states to 8145 states and 27262 transitions. [2021-06-05 13:07:02,460 INFO L78 Accepts]: Start accepts. Automaton has 8145 states and 27262 transitions. Word has length 17 [2021-06-05 13:07:02,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:02,460 INFO L482 AbstractCegarLoop]: Abstraction has 8145 states and 27262 transitions. [2021-06-05 13:07:02,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:02,460 INFO L276 IsEmpty]: Start isEmpty. Operand 8145 states and 27262 transitions. [2021-06-05 13:07:02,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:02,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:02,462 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:02,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-06-05 13:07:02,462 INFO L430 AbstractCegarLoop]: === Iteration 25 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:02,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:02,463 INFO L82 PathProgramCache]: Analyzing trace with hash -315039173, now seen corresponding path program 1 times [2021-06-05 13:07:02,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:02,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782092507] [2021-06-05 13:07:02,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:02,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:02,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:02,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782092507] [2021-06-05 13:07:02,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782092507] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:02,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:02,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:02,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226163176] [2021-06-05 13:07:02,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:02,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:02,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:02,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:02,490 INFO L87 Difference]: Start difference. First operand 8145 states and 27262 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:02,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:02,662 INFO L93 Difference]: Finished difference Result 13677 states and 43251 transitions. [2021-06-05 13:07:02,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:02,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:02,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:02,683 INFO L225 Difference]: With dead ends: 13677 [2021-06-05 13:07:02,683 INFO L226 Difference]: Without dead ends: 13433 [2021-06-05 13:07:02,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.0ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:07:02,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13433 states. [2021-06-05 13:07:02,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13433 to 8003. [2021-06-05 13:07:02,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8003 states, 7983 states have (on average 3.3349617938118503) internal successors, (26623), 8002 states have internal predecessors, (26623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:02,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8003 states to 8003 states and 26623 transitions. [2021-06-05 13:07:02,845 INFO L78 Accepts]: Start accepts. Automaton has 8003 states and 26623 transitions. Word has length 17 [2021-06-05 13:07:02,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:02,845 INFO L482 AbstractCegarLoop]: Abstraction has 8003 states and 26623 transitions. [2021-06-05 13:07:02,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:02,845 INFO L276 IsEmpty]: Start isEmpty. Operand 8003 states and 26623 transitions. [2021-06-05 13:07:02,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:02,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:02,847 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:02,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-06-05 13:07:02,847 INFO L430 AbstractCegarLoop]: === Iteration 26 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:02,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:02,847 INFO L82 PathProgramCache]: Analyzing trace with hash 2063014402, now seen corresponding path program 1 times [2021-06-05 13:07:02,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:02,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666163166] [2021-06-05 13:07:02,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:02,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:02,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666163166] [2021-06-05 13:07:02,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666163166] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:02,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:02,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:02,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54646513] [2021-06-05 13:07:02,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:02,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:02,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:02,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:02,879 INFO L87 Difference]: Start difference. First operand 8003 states and 26623 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:03,073 INFO L93 Difference]: Finished difference Result 13476 states and 42435 transitions. [2021-06-05 13:07:03,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:03,073 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:03,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:03,093 INFO L225 Difference]: With dead ends: 13476 [2021-06-05 13:07:03,093 INFO L226 Difference]: Without dead ends: 13228 [2021-06-05 13:07:03,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:07:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13228 states. [2021-06-05 13:07:03,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13228 to 7767. [2021-06-05 13:07:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7767 states, 7747 states have (on average 3.318187685555699) internal successors, (25706), 7766 states have internal predecessors, (25706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:03,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7767 states to 7767 states and 25706 transitions. [2021-06-05 13:07:03,286 INFO L78 Accepts]: Start accepts. Automaton has 7767 states and 25706 transitions. Word has length 17 [2021-06-05 13:07:03,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:03,286 INFO L482 AbstractCegarLoop]: Abstraction has 7767 states and 25706 transitions. [2021-06-05 13:07:03,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:03,286 INFO L276 IsEmpty]: Start isEmpty. Operand 7767 states and 25706 transitions. [2021-06-05 13:07:03,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:03,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:03,288 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:03,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-06-05 13:07:03,289 INFO L430 AbstractCegarLoop]: === Iteration 27 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:03,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:03,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2062583440, now seen corresponding path program 1 times [2021-06-05 13:07:03,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:03,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547076371] [2021-06-05 13:07:03,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:03,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:03,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547076371] [2021-06-05 13:07:03,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547076371] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:03,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:03,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:03,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377660235] [2021-06-05 13:07:03,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:03,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:03,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:03,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:03,314 INFO L87 Difference]: Start difference. First operand 7767 states and 25706 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:03,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:03,494 INFO L93 Difference]: Finished difference Result 12874 states and 40395 transitions. [2021-06-05 13:07:03,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:03,494 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:03,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:03,516 INFO L225 Difference]: With dead ends: 12874 [2021-06-05 13:07:03,517 INFO L226 Difference]: Without dead ends: 12606 [2021-06-05 13:07:03,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:07:03,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12606 states. [2021-06-05 13:07:03,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12606 to 7550. [2021-06-05 13:07:03,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7550 states, 7530 states have (on average 3.297211155378486) internal successors, (24828), 7549 states have internal predecessors, (24828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:03,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7550 states to 7550 states and 24828 transitions. [2021-06-05 13:07:03,701 INFO L78 Accepts]: Start accepts. Automaton has 7550 states and 24828 transitions. Word has length 17 [2021-06-05 13:07:03,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:03,701 INFO L482 AbstractCegarLoop]: Abstraction has 7550 states and 24828 transitions. [2021-06-05 13:07:03,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:03,701 INFO L276 IsEmpty]: Start isEmpty. Operand 7550 states and 24828 transitions. [2021-06-05 13:07:03,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:03,703 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:03,703 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:03,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-06-05 13:07:03,704 INFO L430 AbstractCegarLoop]: === Iteration 28 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:03,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:03,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1638069932, now seen corresponding path program 1 times [2021-06-05 13:07:03,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:03,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421415271] [2021-06-05 13:07:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:03,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:03,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:03,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421415271] [2021-06-05 13:07:03,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421415271] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:03,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:03,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:03,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426006376] [2021-06-05 13:07:03,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:03,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:03,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:03,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:03,732 INFO L87 Difference]: Start difference. First operand 7550 states and 24828 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:03,910 INFO L93 Difference]: Finished difference Result 12192 states and 38125 transitions. [2021-06-05 13:07:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:03,910 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:03,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:03,930 INFO L225 Difference]: With dead ends: 12192 [2021-06-05 13:07:03,930 INFO L226 Difference]: Without dead ends: 11976 [2021-06-05 13:07:03,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:07:03,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11976 states. [2021-06-05 13:07:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11976 to 7364. [2021-06-05 13:07:04,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7364 states, 7344 states have (on average 3.2800925925925926) internal successors, (24089), 7363 states have internal predecessors, (24089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:04,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7364 states to 7364 states and 24089 transitions. [2021-06-05 13:07:04,105 INFO L78 Accepts]: Start accepts. Automaton has 7364 states and 24089 transitions. Word has length 17 [2021-06-05 13:07:04,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:04,106 INFO L482 AbstractCegarLoop]: Abstraction has 7364 states and 24089 transitions. [2021-06-05 13:07:04,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:04,106 INFO L276 IsEmpty]: Start isEmpty. Operand 7364 states and 24089 transitions. [2021-06-05 13:07:04,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:04,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:04,108 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:04,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-06-05 13:07:04,108 INFO L430 AbstractCegarLoop]: === Iteration 29 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:04,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:04,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1638285413, now seen corresponding path program 1 times [2021-06-05 13:07:04,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:04,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948571660] [2021-06-05 13:07:04,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:04,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:04,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948571660] [2021-06-05 13:07:04,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948571660] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:04,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:04,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:04,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878335459] [2021-06-05 13:07:04,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:04,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:04,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:04,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:04,140 INFO L87 Difference]: Start difference. First operand 7364 states and 24089 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:04,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:04,311 INFO L93 Difference]: Finished difference Result 11910 states and 36995 transitions. [2021-06-05 13:07:04,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:04,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:04,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:04,330 INFO L225 Difference]: With dead ends: 11910 [2021-06-05 13:07:04,330 INFO L226 Difference]: Without dead ends: 11682 [2021-06-05 13:07:04,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:07:04,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11682 states. [2021-06-05 13:07:04,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11682 to 7181. [2021-06-05 13:07:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7181 states, 7161 states have (on average 3.2534562211981566) internal successors, (23298), 7180 states have internal predecessors, (23298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:04,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7181 states to 7181 states and 23298 transitions. [2021-06-05 13:07:04,504 INFO L78 Accepts]: Start accepts. Automaton has 7181 states and 23298 transitions. Word has length 17 [2021-06-05 13:07:04,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:04,504 INFO L482 AbstractCegarLoop]: Abstraction has 7181 states and 23298 transitions. [2021-06-05 13:07:04,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:04,504 INFO L276 IsEmpty]: Start isEmpty. Operand 7181 states and 23298 transitions. [2021-06-05 13:07:04,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:04,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:04,506 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:04,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-06-05 13:07:04,506 INFO L430 AbstractCegarLoop]: === Iteration 30 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:04,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:04,506 INFO L82 PathProgramCache]: Analyzing trace with hash -221066938, now seen corresponding path program 1 times [2021-06-05 13:07:04,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:04,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557138204] [2021-06-05 13:07:04,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:04,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:04,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557138204] [2021-06-05 13:07:04,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557138204] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:04,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:04,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:04,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823682502] [2021-06-05 13:07:04,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:04,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:04,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:04,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:04,534 INFO L87 Difference]: Start difference. First operand 7181 states and 23298 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:04,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:04,706 INFO L93 Difference]: Finished difference Result 11333 states and 35076 transitions. [2021-06-05 13:07:04,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:04,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:04,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:04,726 INFO L225 Difference]: With dead ends: 11333 [2021-06-05 13:07:04,726 INFO L226 Difference]: Without dead ends: 11057 [2021-06-05 13:07:04,726 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 51.8ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:07:04,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11057 states. [2021-06-05 13:07:04,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11057 to 6977. [2021-06-05 13:07:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6977 states, 6957 states have (on average 3.226678165876096) internal successors, (22448), 6976 states have internal predecessors, (22448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:04,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6977 states to 6977 states and 22448 transitions. [2021-06-05 13:07:04,893 INFO L78 Accepts]: Start accepts. Automaton has 6977 states and 22448 transitions. Word has length 17 [2021-06-05 13:07:04,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:04,893 INFO L482 AbstractCegarLoop]: Abstraction has 6977 states and 22448 transitions. [2021-06-05 13:07:04,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 6977 states and 22448 transitions. [2021-06-05 13:07:04,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:04,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:04,896 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:04,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-06-05 13:07:04,896 INFO L430 AbstractCegarLoop]: === Iteration 31 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:04,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:04,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1660264570, now seen corresponding path program 1 times [2021-06-05 13:07:04,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:04,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30091204] [2021-06-05 13:07:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:04,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:04,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:04,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:04,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30091204] [2021-06-05 13:07:04,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30091204] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:04,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:04,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:04,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377254460] [2021-06-05 13:07:04,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:04,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:04,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:04,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:04,923 INFO L87 Difference]: Start difference. First operand 6977 states and 22448 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:05,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:05,091 INFO L93 Difference]: Finished difference Result 11793 states and 36152 transitions. [2021-06-05 13:07:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:05,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:05,109 INFO L225 Difference]: With dead ends: 11793 [2021-06-05 13:07:05,109 INFO L226 Difference]: Without dead ends: 11509 [2021-06-05 13:07:05,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:07:05,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11509 states. [2021-06-05 13:07:05,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11509 to 6676. [2021-06-05 13:07:05,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6676 states, 6658 states have (on average 3.195253829978973) internal successors, (21274), 6675 states have internal predecessors, (21274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:05,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6676 states to 6676 states and 21274 transitions. [2021-06-05 13:07:05,266 INFO L78 Accepts]: Start accepts. Automaton has 6676 states and 21274 transitions. Word has length 17 [2021-06-05 13:07:05,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:05,266 INFO L482 AbstractCegarLoop]: Abstraction has 6676 states and 21274 transitions. [2021-06-05 13:07:05,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:05,266 INFO L276 IsEmpty]: Start isEmpty. Operand 6676 states and 21274 transitions. [2021-06-05 13:07:05,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:05,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:05,268 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:05,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-06-05 13:07:05,268 INFO L430 AbstractCegarLoop]: === Iteration 32 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:05,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:05,268 INFO L82 PathProgramCache]: Analyzing trace with hash -918171258, now seen corresponding path program 1 times [2021-06-05 13:07:05,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:05,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353015540] [2021-06-05 13:07:05,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:05,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:05,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:05,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353015540] [2021-06-05 13:07:05,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353015540] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:05,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:05,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:05,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954369992] [2021-06-05 13:07:05,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:05,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:05,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:05,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:05,292 INFO L87 Difference]: Start difference. First operand 6676 states and 21274 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:05,452 INFO L93 Difference]: Finished difference Result 10874 states and 33149 transitions. [2021-06-05 13:07:05,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:05,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:05,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:05,470 INFO L225 Difference]: With dead ends: 10874 [2021-06-05 13:07:05,470 INFO L226 Difference]: Without dead ends: 10658 [2021-06-05 13:07:05,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:07:05,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10658 states. [2021-06-05 13:07:05,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10658 to 6469. [2021-06-05 13:07:05,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6469 states, 6451 states have (on average 3.1694310959541157) internal successors, (20446), 6468 states have internal predecessors, (20446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:05,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6469 states to 6469 states and 20446 transitions. [2021-06-05 13:07:05,621 INFO L78 Accepts]: Start accepts. Automaton has 6469 states and 20446 transitions. Word has length 17 [2021-06-05 13:07:05,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:05,621 INFO L482 AbstractCegarLoop]: Abstraction has 6469 states and 20446 transitions. [2021-06-05 13:07:05,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:05,622 INFO L276 IsEmpty]: Start isEmpty. Operand 6469 states and 20446 transitions. [2021-06-05 13:07:05,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:05,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:05,623 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:05,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-06-05 13:07:05,624 INFO L430 AbstractCegarLoop]: === Iteration 33 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:05,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:05,624 INFO L82 PathProgramCache]: Analyzing trace with hash -917955777, now seen corresponding path program 1 times [2021-06-05 13:07:05,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:05,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656362332] [2021-06-05 13:07:05,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:05,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:05,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:05,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:05,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656362332] [2021-06-05 13:07:05,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656362332] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:05,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:05,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:05,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109480607] [2021-06-05 13:07:05,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:05,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:05,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:05,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:05,651 INFO L87 Difference]: Start difference. First operand 6469 states and 20446 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:05,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:05,819 INFO L93 Difference]: Finished difference Result 10382 states and 31429 transitions. [2021-06-05 13:07:05,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:05,820 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:05,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:05,835 INFO L225 Difference]: With dead ends: 10382 [2021-06-05 13:07:05,835 INFO L226 Difference]: Without dead ends: 10154 [2021-06-05 13:07:05,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:07:05,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10154 states. [2021-06-05 13:07:05,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10154 to 6301. [2021-06-05 13:07:05,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6301 states, 6283 states have (on average 3.1356040108228553) internal successors, (19701), 6300 states have internal predecessors, (19701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:05,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6301 states to 6301 states and 19701 transitions. [2021-06-05 13:07:05,981 INFO L78 Accepts]: Start accepts. Automaton has 6301 states and 19701 transitions. Word has length 17 [2021-06-05 13:07:05,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:05,982 INFO L482 AbstractCegarLoop]: Abstraction has 6301 states and 19701 transitions. [2021-06-05 13:07:05,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:05,982 INFO L276 IsEmpty]: Start isEmpty. Operand 6301 states and 19701 transitions. [2021-06-05 13:07:05,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:05,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:05,984 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:05,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-06-05 13:07:05,984 INFO L430 AbstractCegarLoop]: === Iteration 34 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:05,984 INFO L82 PathProgramCache]: Analyzing trace with hash 498831736, now seen corresponding path program 1 times [2021-06-05 13:07:05,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:05,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707457952] [2021-06-05 13:07:05,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:06,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:06,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707457952] [2021-06-05 13:07:06,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707457952] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:06,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:06,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:06,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253371482] [2021-06-05 13:07:06,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:06,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:06,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:06,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:06,027 INFO L87 Difference]: Start difference. First operand 6301 states and 19701 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:06,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:06,186 INFO L93 Difference]: Finished difference Result 9898 states and 29774 transitions. [2021-06-05 13:07:06,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:06,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:06,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:06,200 INFO L225 Difference]: With dead ends: 9898 [2021-06-05 13:07:06,200 INFO L226 Difference]: Without dead ends: 9622 [2021-06-05 13:07:06,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 56.9ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:07:06,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9622 states. [2021-06-05 13:07:06,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9622 to 6017. [2021-06-05 13:07:06,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6017 states, 6001 states have (on average 3.0953174470921514) internal successors, (18575), 6016 states have internal predecessors, (18575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:06,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6017 states to 6017 states and 18575 transitions. [2021-06-05 13:07:06,334 INFO L78 Accepts]: Start accepts. Automaton has 6017 states and 18575 transitions. Word has length 17 [2021-06-05 13:07:06,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:06,334 INFO L482 AbstractCegarLoop]: Abstraction has 6017 states and 18575 transitions. [2021-06-05 13:07:06,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:06,334 INFO L276 IsEmpty]: Start isEmpty. Operand 6017 states and 18575 transitions. [2021-06-05 13:07:06,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:06,336 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:06,336 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:06,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-06-05 13:07:06,336 INFO L430 AbstractCegarLoop]: === Iteration 35 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:06,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:06,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1938029368, now seen corresponding path program 1 times [2021-06-05 13:07:06,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:06,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225499734] [2021-06-05 13:07:06,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:06,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:06,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225499734] [2021-06-05 13:07:06,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225499734] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:06,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:06,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:06,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068727666] [2021-06-05 13:07:06,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:06,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:06,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:06,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:06,361 INFO L87 Difference]: Start difference. First operand 6017 states and 18575 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:06,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:06,516 INFO L93 Difference]: Finished difference Result 9578 states and 28556 transitions. [2021-06-05 13:07:06,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:06,517 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:06,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:06,530 INFO L225 Difference]: With dead ends: 9578 [2021-06-05 13:07:06,530 INFO L226 Difference]: Without dead ends: 9302 [2021-06-05 13:07:06,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:07:06,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9302 states. [2021-06-05 13:07:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9302 to 5714. [2021-06-05 13:07:06,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5714 states, 5700 states have (on average 3.0512280701754384) internal successors, (17392), 5713 states have internal predecessors, (17392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5714 states to 5714 states and 17392 transitions. [2021-06-05 13:07:06,656 INFO L78 Accepts]: Start accepts. Automaton has 5714 states and 17392 transitions. Word has length 17 [2021-06-05 13:07:06,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:06,656 INFO L482 AbstractCegarLoop]: Abstraction has 5714 states and 17392 transitions. [2021-06-05 13:07:06,656 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:06,657 INFO L276 IsEmpty]: Start isEmpty. Operand 5714 states and 17392 transitions. [2021-06-05 13:07:06,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:06,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:06,658 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:06,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-06-05 13:07:06,659 INFO L430 AbstractCegarLoop]: === Iteration 36 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:06,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:06,659 INFO L82 PathProgramCache]: Analyzing trace with hash 64817492, now seen corresponding path program 1 times [2021-06-05 13:07:06,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:06,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183401105] [2021-06-05 13:07:06,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:06,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:06,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:06,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183401105] [2021-06-05 13:07:06,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183401105] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:06,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:06,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:06,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993120651] [2021-06-05 13:07:06,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:06,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:06,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:06,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:06,683 INFO L87 Difference]: Start difference. First operand 5714 states and 17392 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:06,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:06,809 INFO L93 Difference]: Finished difference Result 8606 states and 25410 transitions. [2021-06-05 13:07:06,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:07:06,809 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:06,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:06,821 INFO L225 Difference]: With dead ends: 8606 [2021-06-05 13:07:06,821 INFO L226 Difference]: Without dead ends: 8390 [2021-06-05 13:07:06,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:07:06,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8390 states. [2021-06-05 13:07:06,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8390 to 5486. [2021-06-05 13:07:06,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5486 states, 5472 states have (on average 3.016264619883041) internal successors, (16505), 5485 states have internal predecessors, (16505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:06,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5486 states to 5486 states and 16505 transitions. [2021-06-05 13:07:06,941 INFO L78 Accepts]: Start accepts. Automaton has 5486 states and 16505 transitions. Word has length 17 [2021-06-05 13:07:06,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:06,941 INFO L482 AbstractCegarLoop]: Abstraction has 5486 states and 16505 transitions. [2021-06-05 13:07:06,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:06,941 INFO L276 IsEmpty]: Start isEmpty. Operand 5486 states and 16505 transitions. [2021-06-05 13:07:06,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:06,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:06,943 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:06,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-06-05 13:07:06,943 INFO L430 AbstractCegarLoop]: === Iteration 37 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:06,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:06,943 INFO L82 PathProgramCache]: Analyzing trace with hash 64386530, now seen corresponding path program 1 times [2021-06-05 13:07:06,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:06,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580465078] [2021-06-05 13:07:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:06,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:06,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:06,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:06,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580465078] [2021-06-05 13:07:06,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580465078] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:06,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:06,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:06,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653670265] [2021-06-05 13:07:06,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:06,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:06,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:06,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:06,973 INFO L87 Difference]: Start difference. First operand 5486 states and 16505 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:07,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:07,106 INFO L93 Difference]: Finished difference Result 8150 states and 23798 transitions. [2021-06-05 13:07:07,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:07:07,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:07,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:07,118 INFO L225 Difference]: With dead ends: 8150 [2021-06-05 13:07:07,118 INFO L226 Difference]: Without dead ends: 7922 [2021-06-05 13:07:07,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:07:07,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7922 states. [2021-06-05 13:07:07,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7922 to 5315. [2021-06-05 13:07:07,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5315 states, 5301 states have (on average 2.9766081871345027) internal successors, (15779), 5314 states have internal predecessors, (15779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:07,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5315 states to 5315 states and 15779 transitions. [2021-06-05 13:07:07,226 INFO L78 Accepts]: Start accepts. Automaton has 5315 states and 15779 transitions. Word has length 17 [2021-06-05 13:07:07,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:07,227 INFO L482 AbstractCegarLoop]: Abstraction has 5315 states and 15779 transitions. [2021-06-05 13:07:07,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:07,227 INFO L276 IsEmpty]: Start isEmpty. Operand 5315 states and 15779 transitions. [2021-06-05 13:07:07,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:07,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:07,228 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:07,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-06-05 13:07:07,229 INFO L430 AbstractCegarLoop]: === Iteration 38 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:07,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:07,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1503799643, now seen corresponding path program 1 times [2021-06-05 13:07:07,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:07,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387494012] [2021-06-05 13:07:07,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:07,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:07,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:07,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387494012] [2021-06-05 13:07:07,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387494012] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:07,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:07,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:07,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699331806] [2021-06-05 13:07:07,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:07,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:07,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:07,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:07,266 INFO L87 Difference]: Start difference. First operand 5315 states and 15779 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:07,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:07,405 INFO L93 Difference]: Finished difference Result 8150 states and 23573 transitions. [2021-06-05 13:07:07,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:07:07,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:07,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:07,416 INFO L225 Difference]: With dead ends: 8150 [2021-06-05 13:07:07,416 INFO L226 Difference]: Without dead ends: 7902 [2021-06-05 13:07:07,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:07:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7902 states. [2021-06-05 13:07:07,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7902 to 4890. [2021-06-05 13:07:07,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4890 states, 4878 states have (on average 2.927019270192702) internal successors, (14278), 4889 states have internal predecessors, (14278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:07,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4890 states to 4890 states and 14278 transitions. [2021-06-05 13:07:07,527 INFO L78 Accepts]: Start accepts. Automaton has 4890 states and 14278 transitions. Word has length 17 [2021-06-05 13:07:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:07,527 INFO L482 AbstractCegarLoop]: Abstraction has 4890 states and 14278 transitions. [2021-06-05 13:07:07,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:07,527 INFO L276 IsEmpty]: Start isEmpty. Operand 4890 states and 14278 transitions. [2021-06-05 13:07:07,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:07,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:07,529 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:07,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-06-05 13:07:07,529 INFO L430 AbstractCegarLoop]: === Iteration 39 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:07,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:07,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1503584162, now seen corresponding path program 1 times [2021-06-05 13:07:07,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:07,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719389671] [2021-06-05 13:07:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:07,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:07,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:07,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719389671] [2021-06-05 13:07:07,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719389671] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:07,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:07,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:07,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883001922] [2021-06-05 13:07:07,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:07,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:07,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:07,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:07,555 INFO L87 Difference]: Start difference. First operand 4890 states and 14278 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:07,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:07,686 INFO L93 Difference]: Finished difference Result 7662 states and 21883 transitions. [2021-06-05 13:07:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:07:07,686 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:07,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:07,695 INFO L225 Difference]: With dead ends: 7662 [2021-06-05 13:07:07,695 INFO L226 Difference]: Without dead ends: 7434 [2021-06-05 13:07:07,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:07:07,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7434 states. [2021-06-05 13:07:07,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7434 to 4761. [2021-06-05 13:07:07,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4761 states, 4749 states have (on average 2.877869025057907) internal successors, (13667), 4760 states have internal predecessors, (13667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:07,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4761 states to 4761 states and 13667 transitions. [2021-06-05 13:07:07,792 INFO L78 Accepts]: Start accepts. Automaton has 4761 states and 13667 transitions. Word has length 17 [2021-06-05 13:07:07,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:07,792 INFO L482 AbstractCegarLoop]: Abstraction has 4761 states and 13667 transitions. [2021-06-05 13:07:07,792 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:07,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4761 states and 13667 transitions. [2021-06-05 13:07:07,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:07,794 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:07,794 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:07,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-06-05 13:07:07,794 INFO L430 AbstractCegarLoop]: === Iteration 40 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:07,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:07,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1374595621, now seen corresponding path program 1 times [2021-06-05 13:07:07,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:07,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721224260] [2021-06-05 13:07:07,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:07,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:07,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721224260] [2021-06-05 13:07:07,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721224260] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:07,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:07,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:07,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604071419] [2021-06-05 13:07:07,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:07,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:07,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:07,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:07,818 INFO L87 Difference]: Start difference. First operand 4761 states and 13667 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:07,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:07,946 INFO L93 Difference]: Finished difference Result 7491 states and 21115 transitions. [2021-06-05 13:07:07,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:07:07,946 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:07,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:07,955 INFO L225 Difference]: With dead ends: 7491 [2021-06-05 13:07:07,955 INFO L226 Difference]: Without dead ends: 7241 [2021-06-05 13:07:07,955 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:07:07,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7241 states. [2021-06-05 13:07:08,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7241 to 4370. [2021-06-05 13:07:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4370 states, 4360 states have (on average 2.811467889908257) internal successors, (12258), 4369 states have internal predecessors, (12258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4370 states to 4370 states and 12258 transitions. [2021-06-05 13:07:08,044 INFO L78 Accepts]: Start accepts. Automaton has 4370 states and 12258 transitions. Word has length 17 [2021-06-05 13:07:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:08,044 INFO L482 AbstractCegarLoop]: Abstraction has 4370 states and 12258 transitions. [2021-06-05 13:07:08,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 4370 states and 12258 transitions. [2021-06-05 13:07:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:07:08,046 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:08,046 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:08,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-06-05 13:07:08,046 INFO L430 AbstractCegarLoop]: === Iteration 41 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:08,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:08,047 INFO L82 PathProgramCache]: Analyzing trace with hash -1374380140, now seen corresponding path program 1 times [2021-06-05 13:07:08,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:08,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636617861] [2021-06-05 13:07:08,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:08,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:08,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:08,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636617861] [2021-06-05 13:07:08,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636617861] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:08,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:08,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:07:08,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212240994] [2021-06-05 13:07:08,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:07:08,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:08,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:07:08,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:07:08,071 INFO L87 Difference]: Start difference. First operand 4370 states and 12258 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:08,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:08,208 INFO L93 Difference]: Finished difference Result 7001 states and 19421 transitions. [2021-06-05 13:07:08,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:07:08,209 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:07:08,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:08,219 INFO L225 Difference]: With dead ends: 7001 [2021-06-05 13:07:08,219 INFO L226 Difference]: Without dead ends: 6737 [2021-06-05 13:07:08,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 13:07:08,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6737 states. [2021-06-05 13:07:08,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6737 to 4028. [2021-06-05 13:07:08,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 4020 states have (on average 2.7330845771144276) internal successors, (10987), 4027 states have internal predecessors, (10987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:08,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 10987 transitions. [2021-06-05 13:07:08,310 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 10987 transitions. Word has length 17 [2021-06-05 13:07:08,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:08,311 INFO L482 AbstractCegarLoop]: Abstraction has 4028 states and 10987 transitions. [2021-06-05 13:07:08,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:07:08,311 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 10987 transitions. [2021-06-05 13:07:08,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:08,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:08,315 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:08,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-06-05 13:07:08,315 INFO L430 AbstractCegarLoop]: === Iteration 42 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:08,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:08,315 INFO L82 PathProgramCache]: Analyzing trace with hash -617026222, now seen corresponding path program 1 times [2021-06-05 13:07:08,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:08,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988376683] [2021-06-05 13:07:08,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:07:08,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:08,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988376683] [2021-06-05 13:07:08,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988376683] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:08,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:08,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:08,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457837581] [2021-06-05 13:07:08,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:08,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:08,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:08,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:08,354 INFO L87 Difference]: Start difference. First operand 4028 states and 10987 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:08,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:08,505 INFO L93 Difference]: Finished difference Result 6455 states and 17766 transitions. [2021-06-05 13:07:08,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:08,505 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:08,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:08,512 INFO L225 Difference]: With dead ends: 6455 [2021-06-05 13:07:08,512 INFO L226 Difference]: Without dead ends: 6239 [2021-06-05 13:07:08,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:08,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6239 states. [2021-06-05 13:07:08,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6239 to 3971. [2021-06-05 13:07:08,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3971 states, 3963 states have (on average 2.73479687105728) internal successors, (10838), 3970 states have internal predecessors, (10838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:08,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3971 states to 3971 states and 10838 transitions. [2021-06-05 13:07:08,589 INFO L78 Accepts]: Start accepts. Automaton has 3971 states and 10838 transitions. Word has length 21 [2021-06-05 13:07:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:08,589 INFO L482 AbstractCegarLoop]: Abstraction has 3971 states and 10838 transitions. [2021-06-05 13:07:08,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3971 states and 10838 transitions. [2021-06-05 13:07:08,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:08,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:08,592 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:08,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-06-05 13:07:08,592 INFO L430 AbstractCegarLoop]: === Iteration 43 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:08,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:08,592 INFO L82 PathProgramCache]: Analyzing trace with hash -639005379, now seen corresponding path program 1 times [2021-06-05 13:07:08,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:08,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844855806] [2021-06-05 13:07:08,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:08,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:08,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:07:08,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:08,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844855806] [2021-06-05 13:07:08,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844855806] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:08,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:08,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:08,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928615812] [2021-06-05 13:07:08,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:08,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:08,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:08,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:08,632 INFO L87 Difference]: Start difference. First operand 3971 states and 10838 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:08,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:08,796 INFO L93 Difference]: Finished difference Result 6041 states and 16605 transitions. [2021-06-05 13:07:08,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:08,796 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:08,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:08,804 INFO L225 Difference]: With dead ends: 6041 [2021-06-05 13:07:08,804 INFO L226 Difference]: Without dead ends: 5777 [2021-06-05 13:07:08,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:08,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5777 states. [2021-06-05 13:07:08,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5777 to 3870. [2021-06-05 13:07:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3870 states, 3862 states have (on average 2.744432936302434) internal successors, (10599), 3869 states have internal predecessors, (10599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3870 states to 3870 states and 10599 transitions. [2021-06-05 13:07:08,887 INFO L78 Accepts]: Start accepts. Automaton has 3870 states and 10599 transitions. Word has length 21 [2021-06-05 13:07:08,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:08,887 INFO L482 AbstractCegarLoop]: Abstraction has 3870 states and 10599 transitions. [2021-06-05 13:07:08,887 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:08,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3870 states and 10599 transitions. [2021-06-05 13:07:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:08,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:08,890 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:08,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-06-05 13:07:08,890 INFO L430 AbstractCegarLoop]: === Iteration 44 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:08,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:08,890 INFO L82 PathProgramCache]: Analyzing trace with hash 103303428, now seen corresponding path program 1 times [2021-06-05 13:07:08,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:08,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881903859] [2021-06-05 13:07:08,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:08,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:08,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:08,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:08,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881903859] [2021-06-05 13:07:08,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881903859] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:08,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:08,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:08,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429176470] [2021-06-05 13:07:08,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:08,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:08,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:08,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:08,934 INFO L87 Difference]: Start difference. First operand 3870 states and 10599 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:09,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:09,109 INFO L93 Difference]: Finished difference Result 6155 states and 16951 transitions. [2021-06-05 13:07:09,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:09,110 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:09,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:09,117 INFO L225 Difference]: With dead ends: 6155 [2021-06-05 13:07:09,117 INFO L226 Difference]: Without dead ends: 5939 [2021-06-05 13:07:09,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:09,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5939 states. [2021-06-05 13:07:09,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5939 to 3813. [2021-06-05 13:07:09,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3805 states have (on average 2.7463863337713534) internal successors, (10450), 3812 states have internal predecessors, (10450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:09,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 10450 transitions. [2021-06-05 13:07:09,200 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 10450 transitions. Word has length 21 [2021-06-05 13:07:09,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:09,201 INFO L482 AbstractCegarLoop]: Abstraction has 3813 states and 10450 transitions. [2021-06-05 13:07:09,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 10450 transitions. [2021-06-05 13:07:09,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:09,203 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:09,204 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:09,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-06-05 13:07:09,204 INFO L430 AbstractCegarLoop]: === Iteration 45 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:09,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:09,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1335678723, now seen corresponding path program 2 times [2021-06-05 13:07:09,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:09,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970540565] [2021-06-05 13:07:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:09,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:09,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970540565] [2021-06-05 13:07:09,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970540565] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:09,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:09,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:09,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485436920] [2021-06-05 13:07:09,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:09,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:09,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:09,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:09,246 INFO L87 Difference]: Start difference. First operand 3813 states and 10450 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:09,409 INFO L93 Difference]: Finished difference Result 5741 states and 15790 transitions. [2021-06-05 13:07:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:09,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:09,416 INFO L225 Difference]: With dead ends: 5741 [2021-06-05 13:07:09,416 INFO L226 Difference]: Without dead ends: 5483 [2021-06-05 13:07:09,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:09,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2021-06-05 13:07:09,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 3576. [2021-06-05 13:07:09,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3576 states, 3568 states have (on average 2.745515695067265) internal successors, (9796), 3575 states have internal predecessors, (9796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:09,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3576 states to 3576 states and 9796 transitions. [2021-06-05 13:07:09,483 INFO L78 Accepts]: Start accepts. Automaton has 3576 states and 9796 transitions. Word has length 21 [2021-06-05 13:07:09,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:09,483 INFO L482 AbstractCegarLoop]: Abstraction has 3576 states and 9796 transitions. [2021-06-05 13:07:09,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:09,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3576 states and 9796 transitions. [2021-06-05 13:07:09,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:09,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:09,486 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:09,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-06-05 13:07:09,486 INFO L430 AbstractCegarLoop]: === Iteration 46 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:09,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:09,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1770123950, now seen corresponding path program 2 times [2021-06-05 13:07:09,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:09,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474406996] [2021-06-05 13:07:09,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:09,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:09,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474406996] [2021-06-05 13:07:09,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474406996] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:09,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:09,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:09,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405826727] [2021-06-05 13:07:09,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:09,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:09,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:09,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:09,528 INFO L87 Difference]: Start difference. First operand 3576 states and 9796 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:09,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:09,705 INFO L93 Difference]: Finished difference Result 5582 states and 15341 transitions. [2021-06-05 13:07:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:09,705 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:09,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:09,711 INFO L225 Difference]: With dead ends: 5582 [2021-06-05 13:07:09,712 INFO L226 Difference]: Without dead ends: 5366 [2021-06-05 13:07:09,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:09,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5366 states. [2021-06-05 13:07:09,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5366 to 3369. [2021-06-05 13:07:09,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3369 states, 3361 states have (on average 2.7360904492710505) internal successors, (9196), 3368 states have internal predecessors, (9196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:09,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3369 states to 3369 states and 9196 transitions. [2021-06-05 13:07:09,776 INFO L78 Accepts]: Start accepts. Automaton has 3369 states and 9196 transitions. Word has length 21 [2021-06-05 13:07:09,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:09,776 INFO L482 AbstractCegarLoop]: Abstraction has 3369 states and 9196 transitions. [2021-06-05 13:07:09,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:09,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3369 states and 9196 transitions. [2021-06-05 13:07:09,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:09,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:09,779 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:09,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-06-05 13:07:09,779 INFO L430 AbstractCegarLoop]: === Iteration 47 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:09,779 INFO L82 PathProgramCache]: Analyzing trace with hash -353120956, now seen corresponding path program 2 times [2021-06-05 13:07:09,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:09,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889378326] [2021-06-05 13:07:09,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:09,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:09,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889378326] [2021-06-05 13:07:09,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889378326] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:09,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:09,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:09,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869364123] [2021-06-05 13:07:09,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:09,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:09,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:09,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:09,815 INFO L87 Difference]: Start difference. First operand 3369 states and 9196 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:09,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:09,977 INFO L93 Difference]: Finished difference Result 5168 states and 14180 transitions. [2021-06-05 13:07:09,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:09,977 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:09,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:09,982 INFO L225 Difference]: With dead ends: 5168 [2021-06-05 13:07:09,982 INFO L226 Difference]: Without dead ends: 4910 [2021-06-05 13:07:09,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:09,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4910 states. [2021-06-05 13:07:10,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4910 to 3003. [2021-06-05 13:07:10,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 2997 states have (on average 2.735402068735402) internal successors, (8198), 3002 states have internal predecessors, (8198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8198 transitions. [2021-06-05 13:07:10,037 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8198 transitions. Word has length 21 [2021-06-05 13:07:10,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:10,037 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 8198 transitions. [2021-06-05 13:07:10,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:10,037 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8198 transitions. [2021-06-05 13:07:10,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:10,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:10,039 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:10,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-06-05 13:07:10,039 INFO L430 AbstractCegarLoop]: === Iteration 48 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:10,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:10,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1424835939, now seen corresponding path program 1 times [2021-06-05 13:07:10,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:10,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883505306] [2021-06-05 13:07:10,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:10,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:10,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:10,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883505306] [2021-06-05 13:07:10,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883505306] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:10,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:10,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:10,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394199629] [2021-06-05 13:07:10,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:10,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:10,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:10,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:10,076 INFO L87 Difference]: Start difference. First operand 3003 states and 8198 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:10,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:10,231 INFO L93 Difference]: Finished difference Result 4561 states and 12530 transitions. [2021-06-05 13:07:10,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:10,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:10,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:10,236 INFO L225 Difference]: With dead ends: 4561 [2021-06-05 13:07:10,236 INFO L226 Difference]: Without dead ends: 4345 [2021-06-05 13:07:10,236 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 66.8ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:10,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4345 states. [2021-06-05 13:07:10,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4345 to 2946. [2021-06-05 13:07:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2940 states have (on average 2.737755102040816) internal successors, (8049), 2945 states have internal predecessors, (8049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 8049 transitions. [2021-06-05 13:07:10,287 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 8049 transitions. Word has length 21 [2021-06-05 13:07:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:10,287 INFO L482 AbstractCegarLoop]: Abstraction has 2946 states and 8049 transitions. [2021-06-05 13:07:10,287 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 8049 transitions. [2021-06-05 13:07:10,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:10,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:10,289 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:10,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-06-05 13:07:10,289 INFO L430 AbstractCegarLoop]: === Iteration 49 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:10,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:10,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1431149206, now seen corresponding path program 1 times [2021-06-05 13:07:10,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:10,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796760072] [2021-06-05 13:07:10,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:10,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:10,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796760072] [2021-06-05 13:07:10,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796760072] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:10,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:10,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:10,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918653544] [2021-06-05 13:07:10,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:10,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:10,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:10,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:10,336 INFO L87 Difference]: Start difference. First operand 2946 states and 8049 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:10,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:10,468 INFO L93 Difference]: Finished difference Result 4291 states and 11741 transitions. [2021-06-05 13:07:10,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:10,468 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:10,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:10,472 INFO L225 Difference]: With dead ends: 4291 [2021-06-05 13:07:10,472 INFO L226 Difference]: Without dead ends: 4057 [2021-06-05 13:07:10,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:10,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-06-05 13:07:10,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 2871. [2021-06-05 13:07:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2871 states, 2865 states have (on average 2.7469458987783595) internal successors, (7870), 2870 states have internal predecessors, (7870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2871 states to 2871 states and 7870 transitions. [2021-06-05 13:07:10,519 INFO L78 Accepts]: Start accepts. Automaton has 2871 states and 7870 transitions. Word has length 21 [2021-06-05 13:07:10,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:10,519 INFO L482 AbstractCegarLoop]: Abstraction has 2871 states and 7870 transitions. [2021-06-05 13:07:10,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:10,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2871 states and 7870 transitions. [2021-06-05 13:07:10,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:10,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:10,521 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:10,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-06-05 13:07:10,521 INFO L430 AbstractCegarLoop]: === Iteration 50 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:10,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:10,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1319664285, now seen corresponding path program 2 times [2021-06-05 13:07:10,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:10,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813111906] [2021-06-05 13:07:10,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:10,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:10,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813111906] [2021-06-05 13:07:10,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813111906] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:10,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:10,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:10,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719846357] [2021-06-05 13:07:10,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:10,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:10,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:10,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:10,569 INFO L87 Difference]: Start difference. First operand 2871 states and 7870 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:10,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:10,731 INFO L93 Difference]: Finished difference Result 4835 states and 13339 transitions. [2021-06-05 13:07:10,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:10,732 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:10,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:10,736 INFO L225 Difference]: With dead ends: 4835 [2021-06-05 13:07:10,736 INFO L226 Difference]: Without dead ends: 4619 [2021-06-05 13:07:10,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:10,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4619 states. [2021-06-05 13:07:10,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4619 to 2676. [2021-06-05 13:07:10,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2676 states, 2670 states have (on average 2.7348314606741573) internal successors, (7302), 2675 states have internal predecessors, (7302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:10,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2676 states to 2676 states and 7302 transitions. [2021-06-05 13:07:10,785 INFO L78 Accepts]: Start accepts. Automaton has 2676 states and 7302 transitions. Word has length 21 [2021-06-05 13:07:10,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:10,785 INFO L482 AbstractCegarLoop]: Abstraction has 2676 states and 7302 transitions. [2021-06-05 13:07:10,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:10,785 INFO L276 IsEmpty]: Start isEmpty. Operand 2676 states and 7302 transitions. [2021-06-05 13:07:10,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:10,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:10,787 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:10,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-06-05 13:07:10,787 INFO L430 AbstractCegarLoop]: === Iteration 51 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:10,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:10,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1297685128, now seen corresponding path program 1 times [2021-06-05 13:07:10,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:10,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600544170] [2021-06-05 13:07:10,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:10,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:10,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:10,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600544170] [2021-06-05 13:07:10,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600544170] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:10,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:10,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:10,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473988039] [2021-06-05 13:07:10,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:10,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:10,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:10,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:10,822 INFO L87 Difference]: Start difference. First operand 2676 states and 7302 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:10,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:10,984 INFO L93 Difference]: Finished difference Result 4421 states and 12178 transitions. [2021-06-05 13:07:10,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:10,984 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:10,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:10,989 INFO L225 Difference]: With dead ends: 4421 [2021-06-05 13:07:10,989 INFO L226 Difference]: Without dead ends: 4157 [2021-06-05 13:07:10,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:11,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4157 states. [2021-06-05 13:07:11,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4157 to 2575. [2021-06-05 13:07:11,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2569 states have (on average 2.749318801089918) internal successors, (7063), 2574 states have internal predecessors, (7063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:11,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 7063 transitions. [2021-06-05 13:07:11,034 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 7063 transitions. Word has length 21 [2021-06-05 13:07:11,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:11,034 INFO L482 AbstractCegarLoop]: Abstraction has 2575 states and 7063 transitions. [2021-06-05 13:07:11,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:11,034 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 7063 transitions. [2021-06-05 13:07:11,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:11,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:11,036 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:11,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-06-05 13:07:11,036 INFO L430 AbstractCegarLoop]: === Iteration 52 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:11,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:11,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1252932246, now seen corresponding path program 2 times [2021-06-05 13:07:11,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:11,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750895495] [2021-06-05 13:07:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:11,075 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:11,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:11,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750895495] [2021-06-05 13:07:11,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750895495] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:11,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:11,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:11,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593169080] [2021-06-05 13:07:11,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:11,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:11,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:11,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:11,076 INFO L87 Difference]: Start difference. First operand 2575 states and 7063 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:11,246 INFO L93 Difference]: Finished difference Result 3860 states and 10541 transitions. [2021-06-05 13:07:11,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:11,246 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:11,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:11,250 INFO L225 Difference]: With dead ends: 3860 [2021-06-05 13:07:11,250 INFO L226 Difference]: Without dead ends: 3644 [2021-06-05 13:07:11,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:11,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-06-05 13:07:11,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 2368. [2021-06-05 13:07:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2362 states have (on average 2.7362404741744286) internal successors, (6463), 2367 states have internal predecessors, (6463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:11,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 6463 transitions. [2021-06-05 13:07:11,300 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 6463 transitions. Word has length 21 [2021-06-05 13:07:11,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:11,300 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 6463 transitions. [2021-06-05 13:07:11,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:11,300 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 6463 transitions. [2021-06-05 13:07:11,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:11,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:11,301 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:11,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-06-05 13:07:11,301 INFO L430 AbstractCegarLoop]: === Iteration 53 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:11,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:11,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1625032056, now seen corresponding path program 2 times [2021-06-05 13:07:11,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:11,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449245660] [2021-06-05 13:07:11,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:11,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:11,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:07:11,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:11,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449245660] [2021-06-05 13:07:11,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449245660] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:11,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:11,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:11,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456696658] [2021-06-05 13:07:11,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:11,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:11,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:11,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:11,344 INFO L87 Difference]: Start difference. First operand 2368 states and 6463 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:11,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:11,461 INFO L93 Difference]: Finished difference Result 3302 states and 9008 transitions. [2021-06-05 13:07:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:07:11,462 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:11,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:11,465 INFO L225 Difference]: With dead ends: 3302 [2021-06-05 13:07:11,465 INFO L226 Difference]: Without dead ends: 3024 [2021-06-05 13:07:11,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 60.6ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:11,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3024 states. [2021-06-05 13:07:11,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3024 to 1982. [2021-06-05 13:07:11,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1982 states, 1978 states have (on average 2.738624873609707) internal successors, (5417), 1981 states have internal predecessors, (5417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1982 states to 1982 states and 5417 transitions. [2021-06-05 13:07:11,491 INFO L78 Accepts]: Start accepts. Automaton has 1982 states and 5417 transitions. Word has length 21 [2021-06-05 13:07:11,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:11,491 INFO L482 AbstractCegarLoop]: Abstraction has 1982 states and 5417 transitions. [2021-06-05 13:07:11,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:11,491 INFO L276 IsEmpty]: Start isEmpty. Operand 1982 states and 5417 transitions. [2021-06-05 13:07:11,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:11,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:11,493 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:11,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-06-05 13:07:11,493 INFO L430 AbstractCegarLoop]: === Iteration 54 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:11,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:11,493 INFO L82 PathProgramCache]: Analyzing trace with hash 669251137, now seen corresponding path program 1 times [2021-06-05 13:07:11,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:11,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489849569] [2021-06-05 13:07:11,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:11,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:11,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489849569] [2021-06-05 13:07:11,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489849569] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:11,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:11,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:11,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716319875] [2021-06-05 13:07:11,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:11,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:11,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:11,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:11,524 INFO L87 Difference]: Start difference. First operand 1982 states and 5417 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:11,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:11,661 INFO L93 Difference]: Finished difference Result 2819 states and 7682 transitions. [2021-06-05 13:07:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:11,661 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:11,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:11,663 INFO L225 Difference]: With dead ends: 2819 [2021-06-05 13:07:11,663 INFO L226 Difference]: Without dead ends: 2603 [2021-06-05 13:07:11,664 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 73.9ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:11,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2021-06-05 13:07:11,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1925. [2021-06-05 13:07:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1925 states, 1921 states have (on average 2.7423217074440394) internal successors, (5268), 1924 states have internal predecessors, (5268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 5268 transitions. [2021-06-05 13:07:11,686 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 5268 transitions. Word has length 21 [2021-06-05 13:07:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:11,686 INFO L482 AbstractCegarLoop]: Abstraction has 1925 states and 5268 transitions. [2021-06-05 13:07:11,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:11,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 5268 transitions. [2021-06-05 13:07:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:11,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:11,687 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:11,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-06-05 13:07:11,688 INFO L430 AbstractCegarLoop]: === Iteration 55 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:11,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:11,688 INFO L82 PathProgramCache]: Analyzing trace with hash 2108233288, now seen corresponding path program 1 times [2021-06-05 13:07:11,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:11,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386160615] [2021-06-05 13:07:11,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:11,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:11,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386160615] [2021-06-05 13:07:11,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386160615] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:11,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:11,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:11,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940554845] [2021-06-05 13:07:11,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:11,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:11,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:11,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:11,719 INFO L87 Difference]: Start difference. First operand 1925 states and 5268 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:11,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:11,826 INFO L93 Difference]: Finished difference Result 2405 states and 6521 transitions. [2021-06-05 13:07:11,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:07:11,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:11,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:11,828 INFO L225 Difference]: With dead ends: 2405 [2021-06-05 13:07:11,828 INFO L226 Difference]: Without dead ends: 2171 [2021-06-05 13:07:11,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:11,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-06-05 13:07:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 1850. [2021-06-05 13:07:11,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1850 states, 1846 states have (on average 2.756771397616468) internal successors, (5089), 1849 states have internal predecessors, (5089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1850 states to 1850 states and 5089 transitions. [2021-06-05 13:07:11,849 INFO L78 Accepts]: Start accepts. Automaton has 1850 states and 5089 transitions. Word has length 21 [2021-06-05 13:07:11,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:11,849 INFO L482 AbstractCegarLoop]: Abstraction has 1850 states and 5089 transitions. [2021-06-05 13:07:11,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1850 states and 5089 transitions. [2021-06-05 13:07:11,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:11,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:11,850 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:11,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-06-05 13:07:11,850 INFO L430 AbstractCegarLoop]: === Iteration 56 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:11,851 INFO L82 PathProgramCache]: Analyzing trace with hash -881215935, now seen corresponding path program 2 times [2021-06-05 13:07:11,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:11,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079700668] [2021-06-05 13:07:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:11,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:11,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:11,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079700668] [2021-06-05 13:07:11,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079700668] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:11,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:11,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:11,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821219532] [2021-06-05 13:07:11,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:11,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:11,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:11,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:11,885 INFO L87 Difference]: Start difference. First operand 1850 states and 5089 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:12,012 INFO L93 Difference]: Finished difference Result 3093 states and 8491 transitions. [2021-06-05 13:07:12,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:12,012 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:12,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:12,015 INFO L225 Difference]: With dead ends: 3093 [2021-06-05 13:07:12,015 INFO L226 Difference]: Without dead ends: 2877 [2021-06-05 13:07:12,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:12,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2021-06-05 13:07:12,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 1655. [2021-06-05 13:07:12,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1655 states, 1651 states have (on average 2.7383403997577225) internal successors, (4521), 1654 states have internal predecessors, (4521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1655 states to 1655 states and 4521 transitions. [2021-06-05 13:07:12,037 INFO L78 Accepts]: Start accepts. Automaton has 1655 states and 4521 transitions. Word has length 21 [2021-06-05 13:07:12,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:12,037 INFO L482 AbstractCegarLoop]: Abstraction has 1655 states and 4521 transitions. [2021-06-05 13:07:12,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1655 states and 4521 transitions. [2021-06-05 13:07:12,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:12,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:12,039 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:12,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-06-05 13:07:12,039 INFO L430 AbstractCegarLoop]: === Iteration 57 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:12,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:12,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1974769210, now seen corresponding path program 1 times [2021-06-05 13:07:12,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:12,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76180651] [2021-06-05 13:07:12,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:12,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:12,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76180651] [2021-06-05 13:07:12,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76180651] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:12,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:12,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:12,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790252129] [2021-06-05 13:07:12,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:12,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:12,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:12,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:12,072 INFO L87 Difference]: Start difference. First operand 1655 states and 4521 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:12,176 INFO L93 Difference]: Finished difference Result 2535 states and 6958 transitions. [2021-06-05 13:07:12,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:07:12,177 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:12,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:12,179 INFO L225 Difference]: With dead ends: 2535 [2021-06-05 13:07:12,179 INFO L226 Difference]: Without dead ends: 2277 [2021-06-05 13:07:12,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:12,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2277 states. [2021-06-05 13:07:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2277 to 1560. [2021-06-05 13:07:12,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1560 states, 1556 states have (on average 2.7596401028277633) internal successors, (4294), 1559 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1560 states to 1560 states and 4294 transitions. [2021-06-05 13:07:12,198 INFO L78 Accepts]: Start accepts. Automaton has 1560 states and 4294 transitions. Word has length 21 [2021-06-05 13:07:12,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:12,198 INFO L482 AbstractCegarLoop]: Abstraction has 1560 states and 4294 transitions. [2021-06-05 13:07:12,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1560 states and 4294 transitions. [2021-06-05 13:07:12,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:12,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:12,200 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:12,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-06-05 13:07:12,200 INFO L430 AbstractCegarLoop]: === Iteration 58 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:12,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:12,200 INFO L82 PathProgramCache]: Analyzing trace with hash -814483896, now seen corresponding path program 2 times [2021-06-05 13:07:12,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:12,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806417760] [2021-06-05 13:07:12,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:12,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:12,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:12,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806417760] [2021-06-05 13:07:12,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806417760] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:12,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:12,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:12,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692868721] [2021-06-05 13:07:12,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:12,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:12,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:12,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:12,237 INFO L87 Difference]: Start difference. First operand 1560 states and 4294 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:12,350 INFO L93 Difference]: Finished difference Result 2520 states and 6881 transitions. [2021-06-05 13:07:12,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:12,351 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:12,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:12,353 INFO L225 Difference]: With dead ends: 2520 [2021-06-05 13:07:12,353 INFO L226 Difference]: Without dead ends: 2304 [2021-06-05 13:07:12,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:12,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2021-06-05 13:07:12,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 1353. [2021-06-05 13:07:12,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1349 states have (on average 2.738324684951816) internal successors, (3694), 1352 states have internal predecessors, (3694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 3694 transitions. [2021-06-05 13:07:12,370 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 3694 transitions. Word has length 21 [2021-06-05 13:07:12,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:12,370 INFO L482 AbstractCegarLoop]: Abstraction has 1353 states and 3694 transitions. [2021-06-05 13:07:12,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 3694 transitions. [2021-06-05 13:07:12,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:12,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:12,371 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:12,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-06-05 13:07:12,371 INFO L430 AbstractCegarLoop]: === Iteration 59 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:12,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:12,371 INFO L82 PathProgramCache]: Analyzing trace with hash 602519098, now seen corresponding path program 2 times [2021-06-05 13:07:12,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:12,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434807309] [2021-06-05 13:07:12,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:12,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:12,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434807309] [2021-06-05 13:07:12,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434807309] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:12,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:12,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:12,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667776738] [2021-06-05 13:07:12,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:12,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:12,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:12,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:12,404 INFO L87 Difference]: Start difference. First operand 1353 states and 3694 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:12,507 INFO L93 Difference]: Finished difference Result 1962 states and 5348 transitions. [2021-06-05 13:07:12,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:07:12,507 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:12,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:12,509 INFO L225 Difference]: With dead ends: 1962 [2021-06-05 13:07:12,509 INFO L226 Difference]: Without dead ends: 1688 [2021-06-05 13:07:12,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2021-06-05 13:07:12,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 971. [2021-06-05 13:07:12,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 969 states have (on average 2.740970072239422) internal successors, (2656), 970 states have internal predecessors, (2656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 2656 transitions. [2021-06-05 13:07:12,521 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 2656 transitions. Word has length 21 [2021-06-05 13:07:12,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:12,521 INFO L482 AbstractCegarLoop]: Abstraction has 971 states and 2656 transitions. [2021-06-05 13:07:12,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,521 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 2656 transitions. [2021-06-05 13:07:12,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:12,522 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:12,522 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:12,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-06-05 13:07:12,522 INFO L430 AbstractCegarLoop]: === Iteration 60 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:12,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:12,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1351793316, now seen corresponding path program 1 times [2021-06-05 13:07:12,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:12,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142058578] [2021-06-05 13:07:12,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:12,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:12,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:12,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142058578] [2021-06-05 13:07:12,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142058578] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:12,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:12,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:12,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681622868] [2021-06-05 13:07:12,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:12,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:12,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:12,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:12,560 INFO L87 Difference]: Start difference. First operand 971 states and 2656 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:12,646 INFO L93 Difference]: Finished difference Result 1487 states and 4038 transitions. [2021-06-05 13:07:12,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:12,646 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:12,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:12,647 INFO L225 Difference]: With dead ends: 1487 [2021-06-05 13:07:12,647 INFO L226 Difference]: Without dead ends: 1271 [2021-06-05 13:07:12,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:12,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2021-06-05 13:07:12,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 914. [2021-06-05 13:07:12,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 914 states, 912 states have (on average 2.74890350877193) internal successors, (2507), 913 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 914 states to 914 states and 2507 transitions. [2021-06-05 13:07:12,658 INFO L78 Accepts]: Start accepts. Automaton has 914 states and 2507 transitions. Word has length 21 [2021-06-05 13:07:12,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:12,658 INFO L482 AbstractCegarLoop]: Abstraction has 914 states and 2507 transitions. [2021-06-05 13:07:12,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,658 INFO L276 IsEmpty]: Start isEmpty. Operand 914 states and 2507 transitions. [2021-06-05 13:07:12,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:12,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:12,659 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:12,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-06-05 13:07:12,659 INFO L430 AbstractCegarLoop]: === Iteration 61 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:12,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:12,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1526170986, now seen corresponding path program 1 times [2021-06-05 13:07:12,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:12,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428176260] [2021-06-05 13:07:12,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:12,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:12,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:12,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:12,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428176260] [2021-06-05 13:07:12,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428176260] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:12,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:12,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:12,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276361014] [2021-06-05 13:07:12,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:12,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:12,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:12,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:12,692 INFO L87 Difference]: Start difference. First operand 914 states and 2507 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:12,773 INFO L93 Difference]: Finished difference Result 1073 states and 2877 transitions. [2021-06-05 13:07:12,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:07:12,773 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:12,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:12,774 INFO L225 Difference]: With dead ends: 1073 [2021-06-05 13:07:12,774 INFO L226 Difference]: Without dead ends: 839 [2021-06-05 13:07:12,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:12,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-06-05 13:07:12,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 839. [2021-06-05 13:07:12,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 837 states have (on average 2.781362007168459) internal successors, (2328), 838 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2328 transitions. [2021-06-05 13:07:12,782 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2328 transitions. Word has length 21 [2021-06-05 13:07:12,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:12,783 INFO L482 AbstractCegarLoop]: Abstraction has 839 states and 2328 transitions. [2021-06-05 13:07:12,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,783 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2328 transitions. [2021-06-05 13:07:12,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:12,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:12,783 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:12,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-06-05 13:07:12,783 INFO L430 AbstractCegarLoop]: === Iteration 62 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:12,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:12,784 INFO L82 PathProgramCache]: Analyzing trace with hash -20456796, now seen corresponding path program 2 times [2021-06-05 13:07:12,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:12,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114207277] [2021-06-05 13:07:12,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:12,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:12,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114207277] [2021-06-05 13:07:12,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114207277] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:12,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:12,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:12,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684070109] [2021-06-05 13:07:12,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:12,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:12,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:12,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:12,819 INFO L87 Difference]: Start difference. First operand 839 states and 2328 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:12,915 INFO L93 Difference]: Finished difference Result 1217 states and 3291 transitions. [2021-06-05 13:07:12,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:12,915 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:12,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:12,916 INFO L225 Difference]: With dead ends: 1217 [2021-06-05 13:07:12,916 INFO L226 Difference]: Without dead ends: 1001 [2021-06-05 13:07:12,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 67.7ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2021-06-05 13:07:12,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 644. [2021-06-05 13:07:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 642 states have (on average 2.7414330218068534) internal successors, (1760), 643 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 1760 transitions. [2021-06-05 13:07:12,924 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 1760 transitions. Word has length 21 [2021-06-05 13:07:12,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:12,924 INFO L482 AbstractCegarLoop]: Abstraction has 644 states and 1760 transitions. [2021-06-05 13:07:12,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:12,924 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 1760 transitions. [2021-06-05 13:07:12,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:12,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:12,925 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:12,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-06-05 13:07:12,926 INFO L430 AbstractCegarLoop]: === Iteration 63 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:12,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:12,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1459438947, now seen corresponding path program 1 times [2021-06-05 13:07:12,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:12,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126603219] [2021-06-05 13:07:12,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:12,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:12,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126603219] [2021-06-05 13:07:12,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126603219] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:12,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:12,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:12,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349596308] [2021-06-05 13:07:12,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:12,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:12,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:12,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:12,959 INFO L87 Difference]: Start difference. First operand 644 states and 1760 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:13,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:13,034 INFO L93 Difference]: Finished difference Result 803 states and 2130 transitions. [2021-06-05 13:07:13,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:07:13,034 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:13,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:13,035 INFO L225 Difference]: With dead ends: 803 [2021-06-05 13:07:13,035 INFO L226 Difference]: Without dead ends: 569 [2021-06-05 13:07:13,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:13,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2021-06-05 13:07:13,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 569. [2021-06-05 13:07:13,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 567 states have (on average 2.7883597883597884) internal successors, (1581), 568 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:13,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1581 transitions. [2021-06-05 13:07:13,041 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1581 transitions. Word has length 21 [2021-06-05 13:07:13,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:13,041 INFO L482 AbstractCegarLoop]: Abstraction has 569 states and 1581 transitions. [2021-06-05 13:07:13,041 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:13,041 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1581 transitions. [2021-06-05 13:07:13,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:13,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:13,041 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:13,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-06-05 13:07:13,041 INFO L430 AbstractCegarLoop]: === Iteration 64 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:13,042 INFO L82 PathProgramCache]: Analyzing trace with hash -153920874, now seen corresponding path program 2 times [2021-06-05 13:07:13,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:13,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643881629] [2021-06-05 13:07:13,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:13,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:13,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643881629] [2021-06-05 13:07:13,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643881629] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:13,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:13,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:13,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825732216] [2021-06-05 13:07:13,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:13,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:13,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:13,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:13,088 INFO L87 Difference]: Start difference. First operand 569 states and 1581 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:13,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:13,162 INFO L93 Difference]: Finished difference Result 668 states and 1737 transitions. [2021-06-05 13:07:13,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:07:13,162 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:13,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:13,163 INFO L225 Difference]: With dead ends: 668 [2021-06-05 13:07:13,163 INFO L226 Difference]: Without dead ends: 452 [2021-06-05 13:07:13,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:13,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-05 13:07:13,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 362. [2021-06-05 13:07:13,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 360 states have (on average 2.725) internal successors, (981), 361 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 981 transitions. [2021-06-05 13:07:13,167 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 981 transitions. Word has length 21 [2021-06-05 13:07:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:13,167 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 981 transitions. [2021-06-05 13:07:13,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:13,167 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 981 transitions. [2021-06-05 13:07:13,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 13:07:13,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:13,167 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:07:13,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-06-05 13:07:13,168 INFO L430 AbstractCegarLoop]: === Iteration 65 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:07:13,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:13,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1285061277, now seen corresponding path program 2 times [2021-06-05 13:07:13,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:13,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010390192] [2021-06-05 13:07:13,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:13,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:07:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:07:13,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:07:13,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010390192] [2021-06-05 13:07:13,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010390192] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:07:13,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:07:13,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-05 13:07:13,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620621753] [2021-06-05 13:07:13,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 13:07:13,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:07:13,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 13:07:13,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 13:07:13,204 INFO L87 Difference]: Start difference. First operand 362 states and 981 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:13,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:07:13,265 INFO L93 Difference]: Finished difference Result 254 states and 576 transitions. [2021-06-05 13:07:13,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 13:07:13,265 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 13:07:13,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:07:13,265 INFO L225 Difference]: With dead ends: 254 [2021-06-05 13:07:13,265 INFO L226 Difference]: Without dead ends: 0 [2021-06-05 13:07:13,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 61.0ms TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-05 13:07:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-06-05 13:07:13,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-06-05 13:07:13,266 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) [2021-06-05 13:07:13,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-06-05 13:07:13,266 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-06-05 13:07:13,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:07:13,266 INFO L482 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-06-05 13:07:13,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:13,266 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-06-05 13:07:13,266 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-06-05 13:07:13,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-06-05 13:07:13,266 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2021-06-05 13:07:13,266 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 13:07:13,267 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:07:13,267 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:07:13,267 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:07:13,267 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:07:13,267 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:07:13,267 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:07:13,267 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:07:13,267 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-06-05 13:07:13,267 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2021-06-05 13:07:13,933 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 13459 states, 13412 states have (on average 4.122949597375484) internal successors, (55297), 13458 states have internal predecessors, (55297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:13,951 INFO L276 IsEmpty]: Start isEmpty. Operand has 13459 states, 13412 states have (on average 4.122949597375484) internal successors, (55297), 13458 states have internal predecessors, (55297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:07:13,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-06-05 13:07:13,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:07:13,952 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-06-05 13:07:13,952 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-05 13:07:13,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:07:13,952 INFO L82 PathProgramCache]: Analyzing trace with hash -384193469, now seen corresponding path program 1 times [2021-06-05 13:07:13,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:07:13,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463583621] [2021-06-05 13:07:13,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:07:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:07:13,953 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:07:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-05 13:07:13,954 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-05 13:07:13,955 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-05 13:07:13,955 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-06-05 13:07:13,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-06-05 13:07:13,955 INFO L315 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2021-06-05 13:07:13,955 WARN L242 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-05 13:07:13,955 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-06-05 13:07:13,959 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,959 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,959 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,959 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,959 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,959 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,959 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,959 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,959 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,959 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,959 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,960 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,960 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,960 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,960 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,960 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,960 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,960 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,960 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,960 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,960 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,960 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,960 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,960 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,961 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,961 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,961 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,961 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,961 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,961 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,961 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,961 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,961 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,961 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,961 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,961 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,961 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,961 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,962 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,962 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,962 WARN L313 ript$VariableManager]: TermVariabe threadThread1of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,962 WARN L313 ript$VariableManager]: TermVariabe threadThread2of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,963 WARN L313 ript$VariableManager]: TermVariabe threadThread3of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,963 WARN L313 ript$VariableManager]: TermVariabe threadThread4of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,964 WARN L313 ript$VariableManager]: TermVariabe threadThread5of5ForFork0_v not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-05 13:07:13,964 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-05 13:07:13,965 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-05 13:07:13,965 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:07:13,965 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:07:13,965 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:07:13,965 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:07:13,965 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:07:13,965 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:07:13,965 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:07:13,965 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 13:07:13,966 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 54 places, 43 transitions, 131 flow [2021-06-05 13:08:12,121 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 107667 states, 107572 states have (on average 4.988073104525341) internal successors, (536577), 107666 states have internal predecessors, (536577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:08:12,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 107667 states, 107572 states have (on average 4.988073104525341) internal successors, (536577), 107666 states have internal predecessors, (536577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:08:12,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-06-05 13:08:12,277 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:08:12,277 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:08:12,277 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:08:12,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:08:12,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1926720781, now seen corresponding path program 1 times [2021-06-05 13:08:12,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:08:12,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588165600] [2021-06-05 13:08:12,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:08:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:08:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:08:12,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:08:12,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588165600] [2021-06-05 13:08:12,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588165600] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:08:12,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:08:12,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:08:12,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66994353] [2021-06-05 13:08:12,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:08:12,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:08:12,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:08:12,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:08:12,437 INFO L87 Difference]: Start difference. First operand has 107667 states, 107572 states have (on average 4.988073104525341) internal successors, (536577), 107666 states have internal predecessors, (536577), 0 states have call successors, (0), 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, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:08:13,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:08:13,331 INFO L93 Difference]: Finished difference Result 159884 states and 789753 transitions. [2021-06-05 13:08:13,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:08:13,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-06-05 13:08:13,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:08:13,903 INFO L225 Difference]: With dead ends: 159884 [2021-06-05 13:08:13,903 INFO L226 Difference]: Without dead ends: 159318 [2021-06-05 13:08:13,903 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:08:17,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159318 states. [2021-06-05 13:08:19,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159318 to 133172. [2021-06-05 13:08:20,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133172 states, 133085 states have (on average 5.008152684374648) internal successors, (666510), 133171 states have internal predecessors, (666510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:08:21,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133172 states to 133172 states and 666510 transitions. [2021-06-05 13:08:21,229 INFO L78 Accepts]: Start accepts. Automaton has 133172 states and 666510 transitions. Word has length 7 [2021-06-05 13:08:21,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:08:21,229 INFO L482 AbstractCegarLoop]: Abstraction has 133172 states and 666510 transitions. [2021-06-05 13:08:21,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:08:21,229 INFO L276 IsEmpty]: Start isEmpty. Operand 133172 states and 666510 transitions. [2021-06-05 13:08:21,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-06-05 13:08:21,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:08:21,230 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:08:21,230 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-06-05 13:08:21,230 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:08:21,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:08:21,230 INFO L82 PathProgramCache]: Analyzing trace with hash 663806641, now seen corresponding path program 1 times [2021-06-05 13:08:21,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:08:21,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195946712] [2021-06-05 13:08:21,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:08:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:08:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:08:21,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:08:21,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195946712] [2021-06-05 13:08:21,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195946712] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:08:21,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:08:21,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:08:21,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969805888] [2021-06-05 13:08:21,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:08:21,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:08:21,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:08:21,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:08:21,239 INFO L87 Difference]: Start difference. First operand 133172 states and 666510 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:08:23,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:08:23,143 INFO L93 Difference]: Finished difference Result 190086 states and 940922 transitions. [2021-06-05 13:08:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:08:23,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-06-05 13:08:23,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:08:23,891 INFO L225 Difference]: With dead ends: 190086 [2021-06-05 13:08:23,891 INFO L226 Difference]: Without dead ends: 189776 [2021-06-05 13:08:23,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:08:26,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189776 states. [2021-06-05 13:08:30,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189776 to 157848. [2021-06-05 13:08:30,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157848 states, 157762 states have (on average 5.018559602439117) internal successors, (791738), 157847 states have internal predecessors, (791738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:08:32,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157848 states to 157848 states and 791738 transitions. [2021-06-05 13:08:32,053 INFO L78 Accepts]: Start accepts. Automaton has 157848 states and 791738 transitions. Word has length 8 [2021-06-05 13:08:32,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:08:32,053 INFO L482 AbstractCegarLoop]: Abstraction has 157848 states and 791738 transitions. [2021-06-05 13:08:32,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:08:32,053 INFO L276 IsEmpty]: Start isEmpty. Operand 157848 states and 791738 transitions. [2021-06-05 13:08:32,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 13:08:32,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:08:32,054 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:08:32,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-06-05 13:08:32,054 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:08:32,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:08:32,055 INFO L82 PathProgramCache]: Analyzing trace with hash -3600934, now seen corresponding path program 1 times [2021-06-05 13:08:32,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:08:32,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650470584] [2021-06-05 13:08:32,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:08:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:08:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:08:32,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:08:32,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650470584] [2021-06-05 13:08:32,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650470584] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:08:32,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:08:32,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:08:32,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176997227] [2021-06-05 13:08:32,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:08:32,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:08:32,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:08:32,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:08:32,063 INFO L87 Difference]: Start difference. First operand 157848 states and 791738 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:08:33,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:08:33,797 INFO L93 Difference]: Finished difference Result 218028 states and 1079674 transitions. [2021-06-05 13:08:33,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:08:33,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-05 13:08:33,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:08:35,307 INFO L225 Difference]: With dead ends: 218028 [2021-06-05 13:08:35,308 INFO L226 Difference]: Without dead ends: 217728 [2021-06-05 13:08:35,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:08:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217728 states. [2021-06-05 13:08:41,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217728 to 180648. [2021-06-05 13:08:42,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180648 states, 180563 states have (on average 5.020508077513112) internal successors, (906518), 180647 states have internal predecessors, (906518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:08:43,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180648 states to 180648 states and 906518 transitions. [2021-06-05 13:08:43,572 INFO L78 Accepts]: Start accepts. Automaton has 180648 states and 906518 transitions. Word has length 9 [2021-06-05 13:08:43,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:08:43,572 INFO L482 AbstractCegarLoop]: Abstraction has 180648 states and 906518 transitions. [2021-06-05 13:08:43,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:08:43,572 INFO L276 IsEmpty]: Start isEmpty. Operand 180648 states and 906518 transitions. [2021-06-05 13:08:43,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 13:08:43,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:08:43,574 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:08:43,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-06-05 13:08:43,575 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:08:43,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:08:43,575 INFO L82 PathProgramCache]: Analyzing trace with hash 616505957, now seen corresponding path program 1 times [2021-06-05 13:08:43,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:08:43,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568811435] [2021-06-05 13:08:43,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:08:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:08:43,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:08:43,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:08:43,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568811435] [2021-06-05 13:08:43,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568811435] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:08:43,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:08:43,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:08:43,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106562972] [2021-06-05 13:08:43,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:08:43,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:08:43,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:08:43,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:08:43,590 INFO L87 Difference]: Start difference. First operand 180648 states and 906518 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:08:46,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:08:46,034 INFO L93 Difference]: Finished difference Result 241032 states and 1191806 transitions. [2021-06-05 13:08:46,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:08:46,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 13:08:46,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:08:47,002 INFO L225 Difference]: With dead ends: 241032 [2021-06-05 13:08:47,003 INFO L226 Difference]: Without dead ends: 240752 [2021-06-05 13:08:47,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:08:50,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240752 states. [2021-06-05 13:08:54,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240752 to 199864. [2021-06-05 13:08:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199864 states, 199780 states have (on average 5.012383621984182) internal successors, (1001374), 199863 states have internal predecessors, (1001374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:08:56,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199864 states to 199864 states and 1001374 transitions. [2021-06-05 13:08:56,763 INFO L78 Accepts]: Start accepts. Automaton has 199864 states and 1001374 transitions. Word has length 10 [2021-06-05 13:08:56,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:08:56,763 INFO L482 AbstractCegarLoop]: Abstraction has 199864 states and 1001374 transitions. [2021-06-05 13:08:56,763 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:08:56,763 INFO L276 IsEmpty]: Start isEmpty. Operand 199864 states and 1001374 transitions. [2021-06-05 13:08:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:08:56,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:08:56,768 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:08:56,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-06-05 13:08:56,768 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:08:56,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:08:56,769 INFO L82 PathProgramCache]: Analyzing trace with hash 841734634, now seen corresponding path program 1 times [2021-06-05 13:08:56,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:08:56,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718946871] [2021-06-05 13:08:56,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:08:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:08:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:08:56,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:08:56,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718946871] [2021-06-05 13:08:56,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718946871] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:08:56,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:08:56,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:08:56,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375422960] [2021-06-05 13:08:56,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:08:56,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:08:56,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:08:56,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:08:56,789 INFO L87 Difference]: Start difference. First operand 199864 states and 1001374 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:00,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:09:00,592 INFO L93 Difference]: Finished difference Result 376674 states and 1828738 transitions. [2021-06-05 13:09:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:09:00,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:09:00,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:09:03,577 INFO L225 Difference]: With dead ends: 376674 [2021-06-05 13:09:03,577 INFO L226 Difference]: Without dead ends: 376008 [2021-06-05 13:09:03,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:09:07,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376008 states. [2021-06-05 13:09:13,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376008 to 225406. [2021-06-05 13:09:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225406 states, 225322 states have (on average 5.077932913785604) internal successors, (1144170), 225405 states have internal predecessors, (1144170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225406 states to 225406 states and 1144170 transitions. [2021-06-05 13:09:15,748 INFO L78 Accepts]: Start accepts. Automaton has 225406 states and 1144170 transitions. Word has length 11 [2021-06-05 13:09:15,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:09:15,748 INFO L482 AbstractCegarLoop]: Abstraction has 225406 states and 1144170 transitions. [2021-06-05 13:09:15,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:15,748 INFO L276 IsEmpty]: Start isEmpty. Operand 225406 states and 1144170 transitions. [2021-06-05 13:09:15,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:09:15,750 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:09:15,750 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:09:15,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-06-05 13:09:15,750 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:09:15,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:09:15,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1927388186, now seen corresponding path program 1 times [2021-06-05 13:09:15,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:09:15,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642808920] [2021-06-05 13:09:15,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:09:15,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:09:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 13:09:15,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:09:15,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642808920] [2021-06-05 13:09:15,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642808920] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:09:15,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:09:15,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 13:09:15,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437921478] [2021-06-05 13:09:15,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:09:15,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:09:15,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:09:15,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:09:15,757 INFO L87 Difference]: Start difference. First operand 225406 states and 1144170 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:16,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:09:16,702 INFO L93 Difference]: Finished difference Result 64358 states and 278883 transitions. [2021-06-05 13:09:16,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:09:16,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:09:16,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:09:16,879 INFO L225 Difference]: With dead ends: 64358 [2021-06-05 13:09:16,879 INFO L226 Difference]: Without dead ends: 64296 [2021-06-05 13:09:16,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:09:18,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64296 states. [2021-06-05 13:09:19,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64296 to 64296. [2021-06-05 13:09:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64296 states, 64213 states have (on average 4.337984520268481) internal successors, (278555), 64295 states have internal predecessors, (278555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:19,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64296 states to 64296 states and 278555 transitions. [2021-06-05 13:09:19,311 INFO L78 Accepts]: Start accepts. Automaton has 64296 states and 278555 transitions. Word has length 11 [2021-06-05 13:09:19,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:09:19,311 INFO L482 AbstractCegarLoop]: Abstraction has 64296 states and 278555 transitions. [2021-06-05 13:09:19,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:19,311 INFO L276 IsEmpty]: Start isEmpty. Operand 64296 states and 278555 transitions. [2021-06-05 13:09:19,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:09:19,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:09:19,312 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:09:19,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-06-05 13:09:19,312 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:09:19,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:09:19,312 INFO L82 PathProgramCache]: Analyzing trace with hash -2027236256, now seen corresponding path program 1 times [2021-06-05 13:09:19,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:09:19,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717460244] [2021-06-05 13:09:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:09:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:09:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 13:09:19,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:09:19,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717460244] [2021-06-05 13:09:19,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717460244] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:09:19,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:09:19,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 13:09:19,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575815037] [2021-06-05 13:09:19,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 13:09:19,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:09:19,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 13:09:19,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:09:19,318 INFO L87 Difference]: Start difference. First operand 64296 states and 278555 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:20,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:09:20,052 INFO L93 Difference]: Finished difference Result 84888 states and 364202 transitions. [2021-06-05 13:09:20,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 13:09:20,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:09:20,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:09:20,292 INFO L225 Difference]: With dead ends: 84888 [2021-06-05 13:09:20,292 INFO L226 Difference]: Without dead ends: 84584 [2021-06-05 13:09:20,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 13:09:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84584 states. [2021-06-05 13:09:22,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84584 to 67364. [2021-06-05 13:09:23,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67364 states, 67283 states have (on average 4.328879508939851) internal successors, (291260), 67363 states have internal predecessors, (291260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:23,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67364 states to 67364 states and 291260 transitions. [2021-06-05 13:09:23,250 INFO L78 Accepts]: Start accepts. Automaton has 67364 states and 291260 transitions. Word has length 11 [2021-06-05 13:09:23,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:09:23,250 INFO L482 AbstractCegarLoop]: Abstraction has 67364 states and 291260 transitions. [2021-06-05 13:09:23,251 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 67364 states and 291260 transitions. [2021-06-05 13:09:23,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 13:09:23,251 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:09:23,251 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:09:23,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-06-05 13:09:23,251 INFO L430 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:09:23,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:09:23,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1434035516, now seen corresponding path program 2 times [2021-06-05 13:09:23,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:09:23,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804270971] [2021-06-05 13:09:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:09:23,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:09:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:09:23,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:09:23,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804270971] [2021-06-05 13:09:23,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804270971] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:09:23,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:09:23,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:09:23,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042397315] [2021-06-05 13:09:23,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:09:23,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:09:23,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:09:23,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:09:23,268 INFO L87 Difference]: Start difference. First operand 67364 states and 291260 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:24,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:09:24,374 INFO L93 Difference]: Finished difference Result 132608 states and 560220 transitions. [2021-06-05 13:09:24,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:09:24,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 13:09:24,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:09:24,782 INFO L225 Difference]: With dead ends: 132608 [2021-06-05 13:09:24,782 INFO L226 Difference]: Without dead ends: 132103 [2021-06-05 13:09:24,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:09:26,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132103 states. [2021-06-05 13:09:28,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132103 to 70343. [2021-06-05 13:09:28,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70343 states, 70263 states have (on average 4.381054039821812) internal successors, (307826), 70342 states have internal predecessors, (307826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:28,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70343 states to 70343 states and 307826 transitions. [2021-06-05 13:09:28,781 INFO L78 Accepts]: Start accepts. Automaton has 70343 states and 307826 transitions. Word has length 11 [2021-06-05 13:09:28,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:09:28,782 INFO L482 AbstractCegarLoop]: Abstraction has 70343 states and 307826 transitions. [2021-06-05 13:09:28,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:28,782 INFO L276 IsEmpty]: Start isEmpty. Operand 70343 states and 307826 transitions. [2021-06-05 13:09:28,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:09:28,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:09:28,782 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:09:28,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-06-05 13:09:28,782 INFO L430 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:09:28,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:09:28,783 INFO L82 PathProgramCache]: Analyzing trace with hash 352784069, now seen corresponding path program 1 times [2021-06-05 13:09:28,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:09:28,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779548132] [2021-06-05 13:09:28,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:09:28,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:09:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:09:28,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:09:28,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779548132] [2021-06-05 13:09:28,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779548132] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:09:28,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:09:28,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:09:28,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481202472] [2021-06-05 13:09:28,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:09:28,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:09:28,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:09:28,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:09:28,797 INFO L87 Difference]: Start difference. First operand 70343 states and 307826 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:30,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:09:30,022 INFO L93 Difference]: Finished difference Result 140627 states and 601600 transitions. [2021-06-05 13:09:30,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:09:30,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:09:30,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:09:30,431 INFO L225 Difference]: With dead ends: 140627 [2021-06-05 13:09:30,431 INFO L226 Difference]: Without dead ends: 140163 [2021-06-05 13:09:30,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:09:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140163 states. [2021-06-05 13:09:33,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140163 to 74951. [2021-06-05 13:09:33,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74951 states, 74871 states have (on average 4.445432811101762) internal successors, (332834), 74950 states have internal predecessors, (332834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:33,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74951 states to 74951 states and 332834 transitions. [2021-06-05 13:09:33,933 INFO L78 Accepts]: Start accepts. Automaton has 74951 states and 332834 transitions. Word has length 12 [2021-06-05 13:09:33,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:09:33,933 INFO L482 AbstractCegarLoop]: Abstraction has 74951 states and 332834 transitions. [2021-06-05 13:09:33,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:33,934 INFO L276 IsEmpty]: Start isEmpty. Operand 74951 states and 332834 transitions. [2021-06-05 13:09:33,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:09:33,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:09:33,934 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:09:33,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-06-05 13:09:33,934 INFO L430 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:09:33,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:09:33,935 INFO L82 PathProgramCache]: Analyzing trace with hash 98373345, now seen corresponding path program 1 times [2021-06-05 13:09:33,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:09:33,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638910415] [2021-06-05 13:09:33,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:09:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:09:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:09:33,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:09:33,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638910415] [2021-06-05 13:09:33,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638910415] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:09:33,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:09:33,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:09:33,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235229794] [2021-06-05 13:09:33,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:09:33,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:09:33,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:09:33,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:09:33,950 INFO L87 Difference]: Start difference. First operand 74951 states and 332834 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:35,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:09:35,110 INFO L93 Difference]: Finished difference Result 144981 states and 627238 transitions. [2021-06-05 13:09:35,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:09:35,111 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:09:35,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:09:35,546 INFO L225 Difference]: With dead ends: 144981 [2021-06-05 13:09:35,546 INFO L226 Difference]: Without dead ends: 144487 [2021-06-05 13:09:35,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:09:37,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144487 states. [2021-06-05 13:09:39,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144487 to 78123. [2021-06-05 13:09:39,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78123 states, 78044 states have (on average 4.499346522474502) internal successors, (351147), 78122 states have internal predecessors, (351147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78123 states to 78123 states and 351147 transitions. [2021-06-05 13:09:39,724 INFO L78 Accepts]: Start accepts. Automaton has 78123 states and 351147 transitions. Word has length 12 [2021-06-05 13:09:39,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:09:39,724 INFO L482 AbstractCegarLoop]: Abstraction has 78123 states and 351147 transitions. [2021-06-05 13:09:39,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:39,724 INFO L276 IsEmpty]: Start isEmpty. Operand 78123 states and 351147 transitions. [2021-06-05 13:09:39,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:09:39,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:09:39,725 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:09:39,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-06-05 13:09:39,725 INFO L430 AbstractCegarLoop]: === Iteration 11 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:09:39,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:09:39,725 INFO L82 PathProgramCache]: Analyzing trace with hash 98588826, now seen corresponding path program 1 times [2021-06-05 13:09:39,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:09:39,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929728734] [2021-06-05 13:09:39,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:09:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:09:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:09:39,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:09:39,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929728734] [2021-06-05 13:09:39,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929728734] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:09:39,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:09:39,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:09:39,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365051947] [2021-06-05 13:09:39,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:09:39,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:09:39,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:09:39,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:09:39,754 INFO L87 Difference]: Start difference. First operand 78123 states and 351147 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:41,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:09:41,037 INFO L93 Difference]: Finished difference Result 153363 states and 669322 transitions. [2021-06-05 13:09:41,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:09:41,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:09:41,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:09:41,500 INFO L225 Difference]: With dead ends: 153363 [2021-06-05 13:09:41,500 INFO L226 Difference]: Without dead ends: 152899 [2021-06-05 13:09:41,500 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:09:43,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152899 states. [2021-06-05 13:09:44,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152899 to 82723. [2021-06-05 13:09:45,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82723 states, 82645 states have (on average 4.551854316655575) internal successors, (376188), 82722 states have internal predecessors, (376188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:45,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82723 states to 82723 states and 376188 transitions. [2021-06-05 13:09:45,713 INFO L78 Accepts]: Start accepts. Automaton has 82723 states and 376188 transitions. Word has length 12 [2021-06-05 13:09:45,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:09:45,713 INFO L482 AbstractCegarLoop]: Abstraction has 82723 states and 376188 transitions. [2021-06-05 13:09:45,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:45,714 INFO L276 IsEmpty]: Start isEmpty. Operand 82723 states and 376188 transitions. [2021-06-05 13:09:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 13:09:45,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:09:45,714 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:09:45,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-06-05 13:09:45,715 INFO L430 AbstractCegarLoop]: === Iteration 12 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:09:45,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:09:45,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1340393332, now seen corresponding path program 1 times [2021-06-05 13:09:45,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:09:45,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083074894] [2021-06-05 13:09:45,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:09:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:09:45,727 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:09:45,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:09:45,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083074894] [2021-06-05 13:09:45,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083074894] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:09:45,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:09:45,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:09:45,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211556808] [2021-06-05 13:09:45,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:09:45,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:09:45,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:09:45,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:09:45,728 INFO L87 Difference]: Start difference. First operand 82723 states and 376188 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:47,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:09:47,061 INFO L93 Difference]: Finished difference Result 157007 states and 688734 transitions. [2021-06-05 13:09:47,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:09:47,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 13:09:47,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:09:47,553 INFO L225 Difference]: With dead ends: 157007 [2021-06-05 13:09:47,553 INFO L226 Difference]: Without dead ends: 156513 [2021-06-05 13:09:47,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:09:49,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156513 states. [2021-06-05 13:09:51,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156513 to 86798. [2021-06-05 13:09:51,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86798 states, 86721 states have (on average 4.586732164066373) internal successors, (397766), 86797 states have internal predecessors, (397766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86798 states to 86798 states and 397766 transitions. [2021-06-05 13:09:51,902 INFO L78 Accepts]: Start accepts. Automaton has 86798 states and 397766 transitions. Word has length 12 [2021-06-05 13:09:51,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:09:51,903 INFO L482 AbstractCegarLoop]: Abstraction has 86798 states and 397766 transitions. [2021-06-05 13:09:51,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:51,903 INFO L276 IsEmpty]: Start isEmpty. Operand 86798 states and 397766 transitions. [2021-06-05 13:09:51,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:09:51,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:09:51,904 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:09:51,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-06-05 13:09:51,904 INFO L430 AbstractCegarLoop]: === Iteration 13 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:09:51,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:09:51,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1925106986, now seen corresponding path program 1 times [2021-06-05 13:09:51,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:09:51,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694034879] [2021-06-05 13:09:51,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:09:51,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:09:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:09:51,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:09:51,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694034879] [2021-06-05 13:09:51,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694034879] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:09:51,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:09:51,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:09:51,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112411260] [2021-06-05 13:09:51,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:09:51,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:09:51,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:09:51,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:09:51,933 INFO L87 Difference]: Start difference. First operand 86798 states and 397766 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:52,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:09:52,860 INFO L93 Difference]: Finished difference Result 163826 states and 725860 transitions. [2021-06-05 13:09:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:09:52,861 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 13:09:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:09:54,062 INFO L225 Difference]: With dead ends: 163826 [2021-06-05 13:09:54,062 INFO L226 Difference]: Without dead ends: 163240 [2021-06-05 13:09:54,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:09:55,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163240 states. [2021-06-05 13:09:57,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163240 to 91772. [2021-06-05 13:09:57,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91772 states, 91695 states have (on average 4.631146736463275) internal successors, (424653), 91771 states have internal predecessors, (424653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91772 states to 91772 states and 424653 transitions. [2021-06-05 13:09:58,782 INFO L78 Accepts]: Start accepts. Automaton has 91772 states and 424653 transitions. Word has length 13 [2021-06-05 13:09:58,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:09:58,782 INFO L482 AbstractCegarLoop]: Abstraction has 91772 states and 424653 transitions. [2021-06-05 13:09:58,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:09:58,782 INFO L276 IsEmpty]: Start isEmpty. Operand 91772 states and 424653 transitions. [2021-06-05 13:09:58,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:09:58,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:09:58,783 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:09:58,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-06-05 13:09:58,784 INFO L430 AbstractCegarLoop]: === Iteration 14 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:09:58,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:09:58,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1208545436, now seen corresponding path program 1 times [2021-06-05 13:09:58,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:09:58,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488084136] [2021-06-05 13:09:58,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:09:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:09:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:09:58,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:09:58,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488084136] [2021-06-05 13:09:58,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488084136] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:09:58,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:09:58,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:09:58,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351410502] [2021-06-05 13:09:58,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:09:58,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:09:58,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:09:58,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:09:58,814 INFO L87 Difference]: Start difference. First operand 91772 states and 424653 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:00,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:10:00,313 INFO L93 Difference]: Finished difference Result 169516 states and 755819 transitions. [2021-06-05 13:10:00,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:10:00,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 13:10:00,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:10:00,854 INFO L225 Difference]: With dead ends: 169516 [2021-06-05 13:10:00,854 INFO L226 Difference]: Without dead ends: 168930 [2021-06-05 13:10:00,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:10:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168930 states. [2021-06-05 13:10:04,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168930 to 95930. [2021-06-05 13:10:05,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95930 states, 95853 states have (on average 4.660730493568276) internal successors, (446745), 95929 states have internal predecessors, (446745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95930 states to 95930 states and 446745 transitions. [2021-06-05 13:10:05,704 INFO L78 Accepts]: Start accepts. Automaton has 95930 states and 446745 transitions. Word has length 13 [2021-06-05 13:10:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:10:05,704 INFO L482 AbstractCegarLoop]: Abstraction has 95930 states and 446745 transitions. [2021-06-05 13:10:05,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:05,704 INFO L276 IsEmpty]: Start isEmpty. Operand 95930 states and 446745 transitions. [2021-06-05 13:10:05,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:10:05,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:10:05,706 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:10:05,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-06-05 13:10:05,706 INFO L430 AbstractCegarLoop]: === Iteration 15 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:10:05,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:10:05,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1048436932, now seen corresponding path program 1 times [2021-06-05 13:10:05,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:10:05,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242255789] [2021-06-05 13:10:05,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:10:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:10:05,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:10:05,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:10:05,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242255789] [2021-06-05 13:10:05,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242255789] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:10:05,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:10:05,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:10:05,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949926934] [2021-06-05 13:10:05,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:10:05,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:10:05,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:10:05,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:10:05,721 INFO L87 Difference]: Start difference. First operand 95930 states and 446745 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:07,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:10:07,331 INFO L93 Difference]: Finished difference Result 176456 states and 792924 transitions. [2021-06-05 13:10:07,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:10:07,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 13:10:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:10:07,904 INFO L225 Difference]: With dead ends: 176456 [2021-06-05 13:10:07,904 INFO L226 Difference]: Without dead ends: 175842 [2021-06-05 13:10:07,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:10:09,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175842 states. [2021-06-05 13:10:12,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175842 to 99837. [2021-06-05 13:10:12,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99837 states, 99761 states have (on average 4.703922374474995) internal successors, (469268), 99836 states have internal predecessors, (469268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:12,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99837 states to 99837 states and 469268 transitions. [2021-06-05 13:10:12,554 INFO L78 Accepts]: Start accepts. Automaton has 99837 states and 469268 transitions. Word has length 13 [2021-06-05 13:10:12,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:10:12,554 INFO L482 AbstractCegarLoop]: Abstraction has 99837 states and 469268 transitions. [2021-06-05 13:10:12,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:12,554 INFO L276 IsEmpty]: Start isEmpty. Operand 99837 states and 469268 transitions. [2021-06-05 13:10:12,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:10:12,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:10:12,555 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:10:12,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-06-05 13:10:12,555 INFO L430 AbstractCegarLoop]: === Iteration 16 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:10:12,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:10:12,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1048005970, now seen corresponding path program 1 times [2021-06-05 13:10:12,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:10:12,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287042982] [2021-06-05 13:10:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:10:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:10:12,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:10:12,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:10:12,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287042982] [2021-06-05 13:10:12,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287042982] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:10:12,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:10:12,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:10:12,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827236144] [2021-06-05 13:10:12,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:10:12,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:10:12,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:10:12,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:10:12,567 INFO L87 Difference]: Start difference. First operand 99837 states and 469268 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:14,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:10:14,546 INFO L93 Difference]: Finished difference Result 182620 states and 823891 transitions. [2021-06-05 13:10:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:10:14,560 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 13:10:14,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:10:15,587 INFO L225 Difference]: With dead ends: 182620 [2021-06-05 13:10:15,587 INFO L226 Difference]: Without dead ends: 182006 [2021-06-05 13:10:15,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:10:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182006 states. [2021-06-05 13:10:20,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182006 to 104027. [2021-06-05 13:10:20,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104027 states, 103952 states have (on average 4.729548253039865) internal successors, (491646), 104026 states have internal predecessors, (491646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104027 states to 104027 states and 491646 transitions. [2021-06-05 13:10:20,729 INFO L78 Accepts]: Start accepts. Automaton has 104027 states and 491646 transitions. Word has length 13 [2021-06-05 13:10:20,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:10:20,729 INFO L482 AbstractCegarLoop]: Abstraction has 104027 states and 491646 transitions. [2021-06-05 13:10:20,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:20,729 INFO L276 IsEmpty]: Start isEmpty. Operand 104027 states and 491646 transitions. [2021-06-05 13:10:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:10:20,730 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:10:20,730 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:10:20,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-06-05 13:10:20,730 INFO L430 AbstractCegarLoop]: === Iteration 17 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:10:20,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:10:20,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1048221451, now seen corresponding path program 1 times [2021-06-05 13:10:20,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:10:20,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709880895] [2021-06-05 13:10:20,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:10:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:10:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:10:20,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:10:20,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709880895] [2021-06-05 13:10:20,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709880895] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:10:20,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:10:20,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:10:20,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183367800] [2021-06-05 13:10:20,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:10:20,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:10:20,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:10:20,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:10:20,742 INFO L87 Difference]: Start difference. First operand 104027 states and 491646 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:22,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:10:22,230 INFO L93 Difference]: Finished difference Result 189380 states and 857616 transitions. [2021-06-05 13:10:22,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:10:22,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 13:10:22,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:10:22,874 INFO L225 Difference]: With dead ends: 189380 [2021-06-05 13:10:22,874 INFO L226 Difference]: Without dead ends: 188794 [2021-06-05 13:10:22,874 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:10:24,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188794 states. [2021-06-05 13:10:27,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188794 to 108217. [2021-06-05 13:10:27,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108217 states, 108143 states have (on average 4.75021036960321) internal successors, (513702), 108216 states have internal predecessors, (513702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108217 states to 108217 states and 513702 transitions. [2021-06-05 13:10:28,437 INFO L78 Accepts]: Start accepts. Automaton has 108217 states and 513702 transitions. Word has length 13 [2021-06-05 13:10:28,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:10:28,437 INFO L482 AbstractCegarLoop]: Abstraction has 108217 states and 513702 transitions. [2021-06-05 13:10:28,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 108217 states and 513702 transitions. [2021-06-05 13:10:28,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 13:10:28,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:10:28,438 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:10:28,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-06-05 13:10:28,438 INFO L430 AbstractCegarLoop]: === Iteration 18 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:10:28,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:10:28,439 INFO L82 PathProgramCache]: Analyzing trace with hash 1026242273, now seen corresponding path program 1 times [2021-06-05 13:10:28,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:10:28,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625499323] [2021-06-05 13:10:28,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:10:28,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:10:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:10:28,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:10:28,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625499323] [2021-06-05 13:10:28,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625499323] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:10:28,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:10:28,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:10:28,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660601238] [2021-06-05 13:10:28,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:10:28,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:10:28,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:10:28,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:10:28,451 INFO L87 Difference]: Start difference. First operand 108217 states and 513702 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:30,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:10:30,025 INFO L93 Difference]: Finished difference Result 191704 states and 868520 transitions. [2021-06-05 13:10:30,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:10:30,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 13:10:30,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:10:30,616 INFO L225 Difference]: With dead ends: 191704 [2021-06-05 13:10:30,616 INFO L226 Difference]: Without dead ends: 191090 [2021-06-05 13:10:30,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:10:32,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191090 states. [2021-06-05 13:10:35,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191090 to 111864. [2021-06-05 13:10:35,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111864 states, 111791 states have (on average 4.75908615183691) internal successors, (532023), 111863 states have internal predecessors, (532023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111864 states to 111864 states and 532023 transitions. [2021-06-05 13:10:35,595 INFO L78 Accepts]: Start accepts. Automaton has 111864 states and 532023 transitions. Word has length 13 [2021-06-05 13:10:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:10:35,595 INFO L482 AbstractCegarLoop]: Abstraction has 111864 states and 532023 transitions. [2021-06-05 13:10:35,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:35,595 INFO L276 IsEmpty]: Start isEmpty. Operand 111864 states and 532023 transitions. [2021-06-05 13:10:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:10:35,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:10:35,596 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:10:35,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-06-05 13:10:35,596 INFO L430 AbstractCegarLoop]: === Iteration 19 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:10:35,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:10:35,597 INFO L82 PathProgramCache]: Analyzing trace with hash 462062559, now seen corresponding path program 1 times [2021-06-05 13:10:35,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:10:35,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898279496] [2021-06-05 13:10:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:10:35,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:10:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:10:35,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:10:35,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898279496] [2021-06-05 13:10:35,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898279496] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:10:35,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:10:35,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:10:35,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893226612] [2021-06-05 13:10:35,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:10:35,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:10:35,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:10:35,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:10:35,621 INFO L87 Difference]: Start difference. First operand 111864 states and 532023 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:36,224 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-06-05 13:10:37,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:10:37,828 INFO L93 Difference]: Finished difference Result 195825 states and 889624 transitions. [2021-06-05 13:10:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:10:37,848 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:10:37,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:10:38,611 INFO L225 Difference]: With dead ends: 195825 [2021-06-05 13:10:38,611 INFO L226 Difference]: Without dead ends: 195229 [2021-06-05 13:10:38,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 581.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:10:40,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195229 states. [2021-06-05 13:10:43,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195229 to 116253. [2021-06-05 13:10:43,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116253 states, 116180 states have (on average 4.76230848683078) internal successors, (553285), 116252 states have internal predecessors, (553285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:43,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116253 states to 116253 states and 553285 transitions. [2021-06-05 13:10:43,778 INFO L78 Accepts]: Start accepts. Automaton has 116253 states and 553285 transitions. Word has length 14 [2021-06-05 13:10:43,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:10:43,778 INFO L482 AbstractCegarLoop]: Abstraction has 116253 states and 553285 transitions. [2021-06-05 13:10:43,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 116253 states and 553285 transitions. [2021-06-05 13:10:43,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:10:43,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:10:43,780 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:10:43,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-06-05 13:10:43,780 INFO L430 AbstractCegarLoop]: === Iteration 20 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:10:43,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:10:43,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1200633709, now seen corresponding path program 1 times [2021-06-05 13:10:43,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:10:43,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099664983] [2021-06-05 13:10:43,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:10:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:10:43,802 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:10:43,802 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:10:43,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099664983] [2021-06-05 13:10:43,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099664983] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:10:43,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:10:43,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:10:43,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53749202] [2021-06-05 13:10:43,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:10:43,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:10:43,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:10:43,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:10:43,803 INFO L87 Difference]: Start difference. First operand 116253 states and 553285 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:45,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:10:45,556 INFO L93 Difference]: Finished difference Result 201150 states and 914682 transitions. [2021-06-05 13:10:45,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:10:45,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:10:45,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:10:46,796 INFO L225 Difference]: With dead ends: 201150 [2021-06-05 13:10:46,796 INFO L226 Difference]: Without dead ends: 200554 [2021-06-05 13:10:46,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:10:48,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200554 states. [2021-06-05 13:10:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200554 to 119750. [2021-06-05 13:10:51,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119750 states, 119677 states have (on average 4.75869214636062) internal successors, (569506), 119749 states have internal predecessors, (569506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119750 states to 119750 states and 569506 transitions. [2021-06-05 13:10:52,039 INFO L78 Accepts]: Start accepts. Automaton has 119750 states and 569506 transitions. Word has length 14 [2021-06-05 13:10:52,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:10:52,039 INFO L482 AbstractCegarLoop]: Abstraction has 119750 states and 569506 transitions. [2021-06-05 13:10:52,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:52,039 INFO L276 IsEmpty]: Start isEmpty. Operand 119750 states and 569506 transitions. [2021-06-05 13:10:52,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:10:52,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:10:52,040 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:10:52,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-06-05 13:10:52,041 INFO L430 AbstractCegarLoop]: === Iteration 21 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:10:52,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:10:52,041 INFO L82 PathProgramCache]: Analyzing trace with hash -420902149, now seen corresponding path program 1 times [2021-06-05 13:10:52,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:10:52,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115673535] [2021-06-05 13:10:52,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:10:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:10:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 13:10:52,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:10:52,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115673535] [2021-06-05 13:10:52,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115673535] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:10:52,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:10:52,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:10:52,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134990503] [2021-06-05 13:10:52,061 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:10:52,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:10:52,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:10:52,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:10:52,061 INFO L87 Difference]: Start difference. First operand 119750 states and 569506 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:10:53,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:10:53,760 INFO L93 Difference]: Finished difference Result 204655 states and 930133 transitions. [2021-06-05 13:10:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:10:53,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:10:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:10:55,023 INFO L225 Difference]: With dead ends: 204655 [2021-06-05 13:10:55,023 INFO L226 Difference]: Without dead ends: 204059 [2021-06-05 13:10:55,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:10:56,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204059 states. [2021-06-05 13:10:59,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204059 to 122223. [2021-06-05 13:10:59,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122223 states, 122150 states have (on average 4.749398280802292) internal successors, (580139), 122222 states have internal predecessors, (580139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122223 states to 122223 states and 580139 transitions. [2021-06-05 13:11:00,382 INFO L78 Accepts]: Start accepts. Automaton has 122223 states and 580139 transitions. Word has length 14 [2021-06-05 13:11:00,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:11:00,382 INFO L482 AbstractCegarLoop]: Abstraction has 122223 states and 580139 transitions. [2021-06-05 13:11:00,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:00,382 INFO L276 IsEmpty]: Start isEmpty. Operand 122223 states and 580139 transitions. [2021-06-05 13:11:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:11:00,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:11:00,384 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:11:00,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-06-05 13:11:00,384 INFO L430 AbstractCegarLoop]: === Iteration 22 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:11:00,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:11:00,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1859884307, now seen corresponding path program 1 times [2021-06-05 13:11:00,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:11:00,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599184341] [2021-06-05 13:11:00,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:11:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:11:00,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 13:11:00,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:11:00,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599184341] [2021-06-05 13:11:00,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599184341] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:11:00,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:11:00,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:11:00,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713910991] [2021-06-05 13:11:00,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:11:00,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:11:00,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:11:00,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:11:00,400 INFO L87 Difference]: Start difference. First operand 122223 states and 580139 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:02,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:11:02,607 INFO L93 Difference]: Finished difference Result 208197 states and 941814 transitions. [2021-06-05 13:11:02,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:11:02,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:11:02,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:11:03,471 INFO L225 Difference]: With dead ends: 208197 [2021-06-05 13:11:03,471 INFO L226 Difference]: Without dead ends: 207593 [2021-06-05 13:11:03,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:11:05,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207593 states. [2021-06-05 13:11:08,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207593 to 125684. [2021-06-05 13:11:08,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125684 states, 125613 states have (on average 4.759953189558406) internal successors, (597912), 125683 states have internal predecessors, (597912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:09,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125684 states to 125684 states and 597912 transitions. [2021-06-05 13:11:09,330 INFO L78 Accepts]: Start accepts. Automaton has 125684 states and 597912 transitions. Word has length 14 [2021-06-05 13:11:09,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:11:09,330 INFO L482 AbstractCegarLoop]: Abstraction has 125684 states and 597912 transitions. [2021-06-05 13:11:09,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:09,330 INFO L276 IsEmpty]: Start isEmpty. Operand 125684 states and 597912 transitions. [2021-06-05 13:11:09,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:11:09,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:11:09,332 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:11:09,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-06-05 13:11:09,332 INFO L430 AbstractCegarLoop]: === Iteration 23 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:11:09,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:11:09,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1860315269, now seen corresponding path program 1 times [2021-06-05 13:11:09,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:11:09,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872731591] [2021-06-05 13:11:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:11:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:11:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 13:11:09,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:11:09,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872731591] [2021-06-05 13:11:09,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872731591] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:11:09,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:11:09,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:11:09,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589137403] [2021-06-05 13:11:09,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:11:09,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:11:09,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:11:09,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:11:09,344 INFO L87 Difference]: Start difference. First operand 125684 states and 597912 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:11,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:11:11,004 INFO L93 Difference]: Finished difference Result 213785 states and 967470 transitions. [2021-06-05 13:11:11,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:11:11,004 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:11:11,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:11:12,337 INFO L225 Difference]: With dead ends: 213785 [2021-06-05 13:11:12,337 INFO L226 Difference]: Without dead ends: 213189 [2021-06-05 13:11:12,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:11:14,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213189 states. [2021-06-05 13:11:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213189 to 129231. [2021-06-05 13:11:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129231 states, 129162 states have (on average 4.762445610938202) internal successors, (615127), 129230 states have internal predecessors, (615127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129231 states to 129231 states and 615127 transitions. [2021-06-05 13:11:18,529 INFO L78 Accepts]: Start accepts. Automaton has 129231 states and 615127 transitions. Word has length 14 [2021-06-05 13:11:18,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:11:18,529 INFO L482 AbstractCegarLoop]: Abstraction has 129231 states and 615127 transitions. [2021-06-05 13:11:18,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:18,529 INFO L276 IsEmpty]: Start isEmpty. Operand 129231 states and 615127 transitions. [2021-06-05 13:11:18,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:11:18,531 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:11:18,531 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:11:18,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-06-05 13:11:18,531 INFO L430 AbstractCegarLoop]: === Iteration 24 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:11:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:11:18,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1860746231, now seen corresponding path program 1 times [2021-06-05 13:11:18,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:11:18,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083344438] [2021-06-05 13:11:18,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:11:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:11:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 13:11:18,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:11:18,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083344438] [2021-06-05 13:11:18,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083344438] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:11:18,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:11:18,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:11:18,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288831950] [2021-06-05 13:11:18,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:11:18,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:11:18,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:11:18,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:11:18,567 INFO L87 Difference]: Start difference. First operand 129231 states and 615127 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:20,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:11:20,402 INFO L93 Difference]: Finished difference Result 217152 states and 982441 transitions. [2021-06-05 13:11:20,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:11:20,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:11:20,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:11:21,158 INFO L225 Difference]: With dead ends: 217152 [2021-06-05 13:11:21,158 INFO L226 Difference]: Without dead ends: 216556 [2021-06-05 13:11:21,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:11:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216556 states. [2021-06-05 13:11:26,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216556 to 132031. [2021-06-05 13:11:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132031 states, 131964 states have (on average 4.758676608772089) internal successors, (627974), 132030 states have internal predecessors, (627974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:27,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132031 states to 132031 states and 627974 transitions. [2021-06-05 13:11:27,302 INFO L78 Accepts]: Start accepts. Automaton has 132031 states and 627974 transitions. Word has length 14 [2021-06-05 13:11:27,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:11:27,302 INFO L482 AbstractCegarLoop]: Abstraction has 132031 states and 627974 transitions. [2021-06-05 13:11:27,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:27,302 INFO L276 IsEmpty]: Start isEmpty. Operand 132031 states and 627974 transitions. [2021-06-05 13:11:27,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:11:27,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:11:27,303 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:11:27,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-06-05 13:11:27,304 INFO L430 AbstractCegarLoop]: === Iteration 25 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:11:27,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:11:27,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1860530750, now seen corresponding path program 1 times [2021-06-05 13:11:27,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:11:27,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351802979] [2021-06-05 13:11:27,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:11:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:11:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 13:11:27,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:11:27,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351802979] [2021-06-05 13:11:27,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351802979] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:11:27,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:11:27,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:11:27,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453345372] [2021-06-05 13:11:27,320 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:11:27,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:11:27,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:11:27,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:11:27,320 INFO L87 Difference]: Start difference. First operand 132031 states and 627974 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:29,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:11:29,140 INFO L93 Difference]: Finished difference Result 220210 states and 994776 transitions. [2021-06-05 13:11:29,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:11:29,141 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:11:29,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:11:29,850 INFO L225 Difference]: With dead ends: 220210 [2021-06-05 13:11:29,850 INFO L226 Difference]: Without dead ends: 219646 [2021-06-05 13:11:29,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:11:32,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219646 states. [2021-06-05 13:11:34,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219646 to 133930. [2021-06-05 13:11:35,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133930 states, 133865 states have (on average 4.745960482575729) internal successors, (635318), 133929 states have internal predecessors, (635318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133930 states to 133930 states and 635318 transitions. [2021-06-05 13:11:35,641 INFO L78 Accepts]: Start accepts. Automaton has 133930 states and 635318 transitions. Word has length 14 [2021-06-05 13:11:35,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:11:35,641 INFO L482 AbstractCegarLoop]: Abstraction has 133930 states and 635318 transitions. [2021-06-05 13:11:35,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:35,641 INFO L276 IsEmpty]: Start isEmpty. Operand 133930 states and 635318 transitions. [2021-06-05 13:11:35,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 13:11:35,642 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:11:35,642 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:11:35,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-06-05 13:11:35,643 INFO L430 AbstractCegarLoop]: === Iteration 26 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:11:35,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:11:35,643 INFO L82 PathProgramCache]: Analyzing trace with hash -443527770, now seen corresponding path program 1 times [2021-06-05 13:11:35,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:11:35,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351286039] [2021-06-05 13:11:35,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:11:35,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:11:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 13:11:35,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:11:35,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351286039] [2021-06-05 13:11:35,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351286039] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:11:35,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:11:35,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 13:11:35,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323905407] [2021-06-05 13:11:35,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 13:11:35,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:11:35,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 13:11:35,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-05 13:11:35,657 INFO L87 Difference]: Start difference. First operand 133930 states and 635318 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:37,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:11:37,435 INFO L93 Difference]: Finished difference Result 221603 states and 995420 transitions. [2021-06-05 13:11:37,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 13:11:37,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 13:11:37,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:11:38,766 INFO L225 Difference]: With dead ends: 221603 [2021-06-05 13:11:38,766 INFO L226 Difference]: Without dead ends: 220975 [2021-06-05 13:11:38,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:11:40,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220975 states. [2021-06-05 13:11:43,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220975 to 135428. [2021-06-05 13:11:43,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135428 states, 135365 states have (on average 4.7264063827429545) internal successors, (639790), 135427 states have internal predecessors, (639790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:44,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135428 states to 135428 states and 639790 transitions. [2021-06-05 13:11:44,872 INFO L78 Accepts]: Start accepts. Automaton has 135428 states and 639790 transitions. Word has length 14 [2021-06-05 13:11:44,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:11:44,873 INFO L482 AbstractCegarLoop]: Abstraction has 135428 states and 639790 transitions. [2021-06-05 13:11:44,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:44,873 INFO L276 IsEmpty]: Start isEmpty. Operand 135428 states and 639790 transitions. [2021-06-05 13:11:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:11:44,876 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:11:44,876 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:11:44,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-06-05 13:11:44,876 INFO L430 AbstractCegarLoop]: === Iteration 27 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:11:44,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:11:44,876 INFO L82 PathProgramCache]: Analyzing trace with hash 178915726, now seen corresponding path program 1 times [2021-06-05 13:11:44,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:11:44,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874875754] [2021-06-05 13:11:44,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:11:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:11:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:11:44,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:11:44,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874875754] [2021-06-05 13:11:44,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874875754] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:11:44,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:11:44,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:11:44,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43599689] [2021-06-05 13:11:44,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:11:44,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:11:44,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:11:44,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:11:44,935 INFO L87 Difference]: Start difference. First operand 135428 states and 639790 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:11:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:11:47,260 INFO L93 Difference]: Finished difference Result 244823 states and 1077247 transitions. [2021-06-05 13:11:47,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:11:47,260 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:11:47,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:11:48,317 INFO L225 Difference]: With dead ends: 244823 [2021-06-05 13:11:48,317 INFO L226 Difference]: Without dead ends: 244073 [2021-06-05 13:11:48,319 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:11:50,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244073 states. [2021-06-05 13:11:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244073 to 134879. [2021-06-05 13:11:54,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134879 states, 134816 states have (on average 4.718431046760029) internal successors, (636120), 134878 states have internal predecessors, (636120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:11:54,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134879 states to 134879 states and 636120 transitions. [2021-06-05 13:11:54,527 INFO L78 Accepts]: Start accepts. Automaton has 134879 states and 636120 transitions. Word has length 16 [2021-06-05 13:11:54,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:11:54,527 INFO L482 AbstractCegarLoop]: Abstraction has 134879 states and 636120 transitions. [2021-06-05 13:11:54,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:11:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 134879 states and 636120 transitions. [2021-06-05 13:11:54,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:11:54,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:11:54,530 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:11:54,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-06-05 13:11:54,530 INFO L430 AbstractCegarLoop]: === Iteration 28 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:11:54,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:11:54,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1260066425, now seen corresponding path program 1 times [2021-06-05 13:11:54,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:11:54,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548553558] [2021-06-05 13:11:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:11:54,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:11:54,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:11:54,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:11:54,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548553558] [2021-06-05 13:11:54,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548553558] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:11:54,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:11:54,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:11:54,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155655374] [2021-06-05 13:11:54,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:11:54,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:11:54,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:11:54,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:11:54,563 INFO L87 Difference]: Start difference. First operand 134879 states and 636120 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:11:57,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:11:57,264 INFO L93 Difference]: Finished difference Result 245306 states and 1078313 transitions. [2021-06-05 13:11:57,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:11:57,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:11:57,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:11:58,086 INFO L225 Difference]: With dead ends: 245306 [2021-06-05 13:11:58,086 INFO L226 Difference]: Without dead ends: 244496 [2021-06-05 13:11:58,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:12:00,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244496 states. [2021-06-05 13:12:03,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244496 to 133783. [2021-06-05 13:12:03,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133783 states, 133721 states have (on average 4.710606411857524) internal successors, (629907), 133782 states have internal predecessors, (629907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:12:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133783 states to 133783 states and 629907 transitions. [2021-06-05 13:12:04,197 INFO L78 Accepts]: Start accepts. Automaton has 133783 states and 629907 transitions. Word has length 16 [2021-06-05 13:12:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:12:04,197 INFO L482 AbstractCegarLoop]: Abstraction has 133783 states and 629907 transitions. [2021-06-05 13:12:04,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:12:04,197 INFO L276 IsEmpty]: Start isEmpty. Operand 133783 states and 629907 transitions. [2021-06-05 13:12:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:12:04,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:12:04,200 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:12:04,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-06-05 13:12:04,200 INFO L430 AbstractCegarLoop]: === Iteration 29 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:12:04,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:12:04,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1602221668, now seen corresponding path program 1 times [2021-06-05 13:12:04,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:12:04,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898861487] [2021-06-05 13:12:04,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:12:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:12:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:12:04,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:12:04,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898861487] [2021-06-05 13:12:04,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898861487] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:12:04,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:12:04,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:12:04,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005044297] [2021-06-05 13:12:04,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:12:04,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:12:04,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:12:04,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:12:04,222 INFO L87 Difference]: Start difference. First operand 133783 states and 629907 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:12:06,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:12:06,724 INFO L93 Difference]: Finished difference Result 242112 states and 1062892 transitions. [2021-06-05 13:12:06,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:12:06,725 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:12:06,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:12:07,524 INFO L225 Difference]: With dead ends: 242112 [2021-06-05 13:12:07,524 INFO L226 Difference]: Without dead ends: 241362 [2021-06-05 13:12:07,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:12:09,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241362 states. [2021-06-05 13:12:12,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241362 to 133052. [2021-06-05 13:12:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133052 states, 132990 states have (on average 4.7025114670275965) internal successors, (625387), 133051 states have internal predecessors, (625387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:12:13,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133052 states to 133052 states and 625387 transitions. [2021-06-05 13:12:13,635 INFO L78 Accepts]: Start accepts. Automaton has 133052 states and 625387 transitions. Word has length 16 [2021-06-05 13:12:13,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:12:13,635 INFO L482 AbstractCegarLoop]: Abstraction has 133052 states and 625387 transitions. [2021-06-05 13:12:13,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:12:13,636 INFO L276 IsEmpty]: Start isEmpty. Operand 133052 states and 625387 transitions. [2021-06-05 13:12:13,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:12:13,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:12:13,638 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:12:13,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-06-05 13:12:13,639 INFO L430 AbstractCegarLoop]: === Iteration 30 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:12:13,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:12:13,639 INFO L82 PathProgramCache]: Analyzing trace with hash -163239517, now seen corresponding path program 1 times [2021-06-05 13:12:13,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:12:13,639 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547362908] [2021-06-05 13:12:13,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:12:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:12:13,660 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:12:13,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:12:13,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547362908] [2021-06-05 13:12:13,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547362908] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:12:13,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:12:13,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:12:13,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663434558] [2021-06-05 13:12:13,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:12:13,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:12:13,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:12:13,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:12:13,661 INFO L87 Difference]: Start difference. First operand 133052 states and 625387 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:12:15,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:12:15,496 INFO L93 Difference]: Finished difference Result 240368 states and 1053486 transitions. [2021-06-05 13:12:15,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:12:15,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:12:15,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:12:16,782 INFO L225 Difference]: With dead ends: 240368 [2021-06-05 13:12:16,782 INFO L226 Difference]: Without dead ends: 239558 [2021-06-05 13:12:16,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:12:18,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239558 states. [2021-06-05 13:12:21,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239558 to 131920. [2021-06-05 13:12:21,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131920 states, 131859 states have (on average 4.694089899058843) internal successors, (618958), 131919 states have internal predecessors, (618958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:12:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131920 states to 131920 states and 618958 transitions. [2021-06-05 13:12:23,051 INFO L78 Accepts]: Start accepts. Automaton has 131920 states and 618958 transitions. Word has length 16 [2021-06-05 13:12:23,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:12:23,051 INFO L482 AbstractCegarLoop]: Abstraction has 131920 states and 618958 transitions. [2021-06-05 13:12:23,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:12:23,051 INFO L276 IsEmpty]: Start isEmpty. Operand 131920 states and 618958 transitions. [2021-06-05 13:12:23,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:12:23,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:12:23,055 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:12:23,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-06-05 13:12:23,056 INFO L430 AbstractCegarLoop]: === Iteration 31 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:12:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:12:23,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1209010588, now seen corresponding path program 1 times [2021-06-05 13:12:23,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:12:23,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332624663] [2021-06-05 13:12:23,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:12:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:12:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:12:23,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:12:23,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332624663] [2021-06-05 13:12:23,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332624663] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:12:23,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:12:23,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:12:23,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856769398] [2021-06-05 13:12:23,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:12:23,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:12:23,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:12:23,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:12:23,089 INFO L87 Difference]: Start difference. First operand 131920 states and 618958 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:12:24,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:12:24,970 INFO L93 Difference]: Finished difference Result 237004 states and 1037241 transitions. [2021-06-05 13:12:24,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:12:24,971 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:12:24,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:12:26,206 INFO L225 Difference]: With dead ends: 237004 [2021-06-05 13:12:26,206 INFO L226 Difference]: Without dead ends: 236254 [2021-06-05 13:12:26,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:12:28,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236254 states. [2021-06-05 13:12:31,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236254 to 131153. [2021-06-05 13:12:31,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131153 states, 131092 states have (on average 4.6854270283465045) internal successors, (614222), 131152 states have internal predecessors, (614222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:12:32,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131153 states to 131153 states and 614222 transitions. [2021-06-05 13:12:32,237 INFO L78 Accepts]: Start accepts. Automaton has 131153 states and 614222 transitions. Word has length 16 [2021-06-05 13:12:32,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:12:32,237 INFO L482 AbstractCegarLoop]: Abstraction has 131153 states and 614222 transitions. [2021-06-05 13:12:32,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:12:32,237 INFO L276 IsEmpty]: Start isEmpty. Operand 131153 states and 614222 transitions. [2021-06-05 13:12:32,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 13:12:32,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:12:32,242 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:12:32,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-06-05 13:12:32,242 INFO L430 AbstractCegarLoop]: === Iteration 32 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:12:32,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:12:32,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1668953714, now seen corresponding path program 1 times [2021-06-05 13:12:32,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:12:32,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218099471] [2021-06-05 13:12:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:12:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:12:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:12:32,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:12:32,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218099471] [2021-06-05 13:12:32,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218099471] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:12:32,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:12:32,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:12:32,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847306417] [2021-06-05 13:12:32,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:12:32,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:12:32,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:12:32,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:12:32,291 INFO L87 Difference]: Start difference. First operand 131153 states and 614222 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:12:34,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:12:34,343 INFO L93 Difference]: Finished difference Result 237429 states and 1037981 transitions. [2021-06-05 13:12:34,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:12:34,343 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2021-06-05 13:12:34,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:12:35,929 INFO L225 Difference]: With dead ends: 237429 [2021-06-05 13:12:35,930 INFO L226 Difference]: Without dead ends: 236604 [2021-06-05 13:12:35,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.6ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:12:37,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236604 states. [2021-06-05 13:12:40,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236604 to 129846. [2021-06-05 13:12:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129846 states, 129786 states have (on average 4.6769605350345955) internal successors, (607004), 129845 states have internal predecessors, (607004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:12:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129846 states to 129846 states and 607004 transitions. [2021-06-05 13:12:42,143 INFO L78 Accepts]: Start accepts. Automaton has 129846 states and 607004 transitions. Word has length 16 [2021-06-05 13:12:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:12:42,143 INFO L482 AbstractCegarLoop]: Abstraction has 129846 states and 607004 transitions. [2021-06-05 13:12:42,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2021-06-05 13:12:42,143 INFO L276 IsEmpty]: Start isEmpty. Operand 129846 states and 607004 transitions. [2021-06-05 13:12:42,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:12:42,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:12:42,147 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:12:42,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-06-05 13:12:42,148 INFO L430 AbstractCegarLoop]: === Iteration 33 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:12:42,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:12:42,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1281588884, now seen corresponding path program 1 times [2021-06-05 13:12:42,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:12:42,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417436319] [2021-06-05 13:12:42,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:12:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:12:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 13:12:42,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:12:42,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417436319] [2021-06-05 13:12:42,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417436319] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:12:42,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:12:42,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:12:42,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793621756] [2021-06-05 13:12:42,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:12:42,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:12:42,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:12:42,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:12:42,172 INFO L87 Difference]: Start difference. First operand 129846 states and 607004 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:12:44,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:12:44,130 INFO L93 Difference]: Finished difference Result 238603 states and 1040081 transitions. [2021-06-05 13:12:44,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:12:44,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:12:44,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:12:44,881 INFO L225 Difference]: With dead ends: 238603 [2021-06-05 13:12:44,881 INFO L226 Difference]: Without dead ends: 237753 [2021-06-05 13:12:44,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:12:47,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237753 states. [2021-06-05 13:12:50,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237753 to 129789. [2021-06-05 13:12:50,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129789 states, 129729 states have (on average 4.666019163024458) internal successors, (605318), 129788 states have internal predecessors, (605318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:12:50,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129789 states to 129789 states and 605318 transitions. [2021-06-05 13:12:50,862 INFO L78 Accepts]: Start accepts. Automaton has 129789 states and 605318 transitions. Word has length 17 [2021-06-05 13:12:50,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:12:50,862 INFO L482 AbstractCegarLoop]: Abstraction has 129789 states and 605318 transitions. [2021-06-05 13:12:50,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:12:50,862 INFO L276 IsEmpty]: Start isEmpty. Operand 129789 states and 605318 transitions. [2021-06-05 13:12:50,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:12:50,867 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:12:50,867 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:12:50,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-06-05 13:12:50,867 INFO L430 AbstractCegarLoop]: === Iteration 34 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:12:50,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:12:50,867 INFO L82 PathProgramCache]: Analyzing trace with hash -756396058, now seen corresponding path program 1 times [2021-06-05 13:12:50,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:12:50,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996834928] [2021-06-05 13:12:50,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:12:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:12:50,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:12:50,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:12:50,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996834928] [2021-06-05 13:12:50,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996834928] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:12:50,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:12:50,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:12:50,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179074925] [2021-06-05 13:12:50,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:12:50,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:12:50,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:12:50,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:12:50,889 INFO L87 Difference]: Start difference. First operand 129789 states and 605318 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:12:53,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:12:53,320 INFO L93 Difference]: Finished difference Result 237379 states and 1032879 transitions. [2021-06-05 13:12:53,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:12:53,337 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:12:53,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:12:54,156 INFO L225 Difference]: With dead ends: 237379 [2021-06-05 13:12:54,156 INFO L226 Difference]: Without dead ends: 236597 [2021-06-05 13:12:54,157 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:12:56,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236597 states. [2021-06-05 13:12:59,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236597 to 128939. [2021-06-05 13:12:59,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128939 states, 128879 states have (on average 4.657120244570488) internal successors, (600205), 128938 states have internal predecessors, (600205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128939 states to 128939 states and 600205 transitions. [2021-06-05 13:13:00,251 INFO L78 Accepts]: Start accepts. Automaton has 128939 states and 600205 transitions. Word has length 17 [2021-06-05 13:13:00,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:00,251 INFO L482 AbstractCegarLoop]: Abstraction has 128939 states and 600205 transitions. [2021-06-05 13:13:00,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:13:00,252 INFO L276 IsEmpty]: Start isEmpty. Operand 128939 states and 600205 transitions. [2021-06-05 13:13:00,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:13:00,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:00,256 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:00,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-06-05 13:13:00,256 INFO L430 AbstractCegarLoop]: === Iteration 35 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:13:00,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:00,256 INFO L82 PathProgramCache]: Analyzing trace with hash -756611539, now seen corresponding path program 1 times [2021-06-05 13:13:00,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:00,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122597730] [2021-06-05 13:13:00,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:00,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:13:00,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:00,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122597730] [2021-06-05 13:13:00,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122597730] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:00,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:00,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:13:00,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603741828] [2021-06-05 13:13:00,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:13:00,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:00,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:13:00,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:13:00,290 INFO L87 Difference]: Start difference. First operand 128939 states and 600205 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:13:02,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:02,091 INFO L93 Difference]: Finished difference Result 237051 states and 1029459 transitions. [2021-06-05 13:13:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:13:02,091 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:13:02,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:02,808 INFO L225 Difference]: With dead ends: 237051 [2021-06-05 13:13:02,808 INFO L226 Difference]: Without dead ends: 236201 [2021-06-05 13:13:02,809 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:13:05,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236201 states. [2021-06-05 13:13:08,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236201 to 129003. [2021-06-05 13:13:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129003 states, 128943 states have (on average 4.6450136882188255) internal successors, (598942), 129002 states have internal predecessors, (598942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:08,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129003 states to 129003 states and 598942 transitions. [2021-06-05 13:13:08,666 INFO L78 Accepts]: Start accepts. Automaton has 129003 states and 598942 transitions. Word has length 17 [2021-06-05 13:13:08,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:08,666 INFO L482 AbstractCegarLoop]: Abstraction has 129003 states and 598942 transitions. [2021-06-05 13:13:08,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:13:08,666 INFO L276 IsEmpty]: Start isEmpty. Operand 129003 states and 598942 transitions. [2021-06-05 13:13:08,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:13:08,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:08,670 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:08,670 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-06-05 13:13:08,670 INFO L430 AbstractCegarLoop]: === Iteration 36 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:13:08,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:08,670 INFO L82 PathProgramCache]: Analyzing trace with hash -778590696, now seen corresponding path program 1 times [2021-06-05 13:13:08,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:08,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577256581] [2021-06-05 13:13:08,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:09,277 WARN L205 SmtUtils]: Spent 592.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 13:13:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:13:09,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:09,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577256581] [2021-06-05 13:13:09,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577256581] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:09,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:09,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:13:09,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349577815] [2021-06-05 13:13:09,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:13:09,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:09,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:13:09,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:13:09,288 INFO L87 Difference]: Start difference. First operand 129003 states and 598942 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:13:11,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:11,252 INFO L93 Difference]: Finished difference Result 237507 states and 1030226 transitions. [2021-06-05 13:13:11,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:13:11,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:13:11,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:12,031 INFO L225 Difference]: With dead ends: 237507 [2021-06-05 13:13:12,032 INFO L226 Difference]: Without dead ends: 236601 [2021-06-05 13:13:12,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 649.9ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:13:14,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236601 states. [2021-06-05 13:13:17,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236601 to 128534. [2021-06-05 13:13:17,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128534 states, 128474 states have (on average 4.632843999564114) internal successors, (595200), 128533 states have internal predecessors, (595200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128534 states to 128534 states and 595200 transitions. [2021-06-05 13:13:18,064 INFO L78 Accepts]: Start accepts. Automaton has 128534 states and 595200 transitions. Word has length 17 [2021-06-05 13:13:18,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:18,065 INFO L482 AbstractCegarLoop]: Abstraction has 128534 states and 595200 transitions. [2021-06-05 13:13:18,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:13:18,065 INFO L276 IsEmpty]: Start isEmpty. Operand 128534 states and 595200 transitions. [2021-06-05 13:13:18,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:13:18,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:18,069 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:18,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-06-05 13:13:18,069 INFO L430 AbstractCegarLoop]: === Iteration 37 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:13:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:18,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1900904098, now seen corresponding path program 1 times [2021-06-05 13:13:18,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:18,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859060434] [2021-06-05 13:13:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:18,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:13:18,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:18,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859060434] [2021-06-05 13:13:18,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859060434] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:18,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:18,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:13:18,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932345744] [2021-06-05 13:13:18,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:13:18,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:18,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:13:18,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:13:18,094 INFO L87 Difference]: Start difference. First operand 128534 states and 595200 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:13:20,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:20,234 INFO L93 Difference]: Finished difference Result 232797 states and 1009426 transitions. [2021-06-05 13:13:20,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:13:20,235 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:13:20,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:21,123 INFO L225 Difference]: With dead ends: 232797 [2021-06-05 13:13:21,123 INFO L226 Difference]: Without dead ends: 231947 [2021-06-05 13:13:21,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:13:23,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231947 states. [2021-06-05 13:13:26,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231947 to 128416. [2021-06-05 13:13:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128416 states, 128356 states have (on average 4.621794072735205) internal successors, (593235), 128415 states have internal predecessors, (593235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:27,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128416 states to 128416 states and 593235 transitions. [2021-06-05 13:13:27,102 INFO L78 Accepts]: Start accepts. Automaton has 128416 states and 593235 transitions. Word has length 17 [2021-06-05 13:13:27,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:27,102 INFO L482 AbstractCegarLoop]: Abstraction has 128416 states and 593235 transitions. [2021-06-05 13:13:27,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:13:27,103 INFO L276 IsEmpty]: Start isEmpty. Operand 128416 states and 593235 transitions. [2021-06-05 13:13:27,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:13:27,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:27,107 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:27,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-06-05 13:13:27,107 INFO L430 AbstractCegarLoop]: === Iteration 38 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:13:27,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:27,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1101571838, now seen corresponding path program 1 times [2021-06-05 13:13:27,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:27,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231602395] [2021-06-05 13:13:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:13:27,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:27,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231602395] [2021-06-05 13:13:27,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231602395] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:27,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:27,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:13:27,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697792546] [2021-06-05 13:13:27,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:13:27,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:27,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:13:27,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:13:27,132 INFO L87 Difference]: Start difference. First operand 128416 states and 593235 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:13:29,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:29,540 INFO L93 Difference]: Finished difference Result 232111 states and 1003042 transitions. [2021-06-05 13:13:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:13:29,557 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:13:29,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:30,380 INFO L225 Difference]: With dead ends: 232111 [2021-06-05 13:13:30,380 INFO L226 Difference]: Without dead ends: 231329 [2021-06-05 13:13:30,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 47.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:13:32,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231329 states. [2021-06-05 13:13:35,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231329 to 127264. [2021-06-05 13:13:35,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127264 states, 127204 states have (on average 4.610405333165624) internal successors, (586462), 127263 states have internal predecessors, (586462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127264 states to 127264 states and 586462 transitions. [2021-06-05 13:13:36,411 INFO L78 Accepts]: Start accepts. Automaton has 127264 states and 586462 transitions. Word has length 17 [2021-06-05 13:13:36,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:36,411 INFO L482 AbstractCegarLoop]: Abstraction has 127264 states and 586462 transitions. [2021-06-05 13:13:36,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:13:36,411 INFO L276 IsEmpty]: Start isEmpty. Operand 127264 states and 586462 transitions. [2021-06-05 13:13:36,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:13:36,416 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:36,416 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:36,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-06-05 13:13:36,416 INFO L430 AbstractCegarLoop]: === Iteration 39 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:13:36,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:36,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1101356357, now seen corresponding path program 1 times [2021-06-05 13:13:36,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:36,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717279946] [2021-06-05 13:13:36,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:13:36,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:36,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717279946] [2021-06-05 13:13:36,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717279946] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:36,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:36,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:13:36,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335926157] [2021-06-05 13:13:36,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:13:36,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:36,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:13:36,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:13:36,462 INFO L87 Difference]: Start difference. First operand 127264 states and 586462 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:13:38,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:38,251 INFO L93 Difference]: Finished difference Result 233113 states and 1004334 transitions. [2021-06-05 13:13:38,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:13:38,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:13:38,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:38,966 INFO L225 Difference]: With dead ends: 233113 [2021-06-05 13:13:38,966 INFO L226 Difference]: Without dead ends: 232263 [2021-06-05 13:13:38,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:13:41,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232263 states. [2021-06-05 13:13:44,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232263 to 126900. [2021-06-05 13:13:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126900 states, 126840 states have (on average 4.596436455376852) internal successors, (583012), 126899 states have internal predecessors, (583012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126900 states to 126900 states and 583012 transitions. [2021-06-05 13:13:44,674 INFO L78 Accepts]: Start accepts. Automaton has 126900 states and 583012 transitions. Word has length 17 [2021-06-05 13:13:44,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:44,675 INFO L482 AbstractCegarLoop]: Abstraction has 126900 states and 583012 transitions. [2021-06-05 13:13:44,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:13:44,675 INFO L276 IsEmpty]: Start isEmpty. Operand 126900 states and 583012 transitions. [2021-06-05 13:13:44,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:13:44,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:44,679 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:44,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-06-05 13:13:44,679 INFO L430 AbstractCegarLoop]: === Iteration 40 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:13:44,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:44,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1123335514, now seen corresponding path program 1 times [2021-06-05 13:13:44,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:44,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485750097] [2021-06-05 13:13:44,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:44,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 13:13:44,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:44,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485750097] [2021-06-05 13:13:44,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485750097] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:44,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:44,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:13:44,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905593234] [2021-06-05 13:13:44,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:13:44,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:44,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:13:44,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:13:44,724 INFO L87 Difference]: Start difference. First operand 126900 states and 583012 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:13:47,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:47,133 INFO L93 Difference]: Finished difference Result 233348 states and 1004266 transitions. [2021-06-05 13:13:47,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:13:47,140 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:13:47,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:47,987 INFO L225 Difference]: With dead ends: 233348 [2021-06-05 13:13:47,988 INFO L226 Difference]: Without dead ends: 232442 [2021-06-05 13:13:47,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:13:50,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232442 states. [2021-06-05 13:13:52,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232442 to 125853. [2021-06-05 13:13:52,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125853 states, 125794 states have (on average 4.58308822360367) internal successors, (576525), 125852 states have internal predecessors, (576525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:13:54,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125853 states to 125853 states and 576525 transitions. [2021-06-05 13:13:54,021 INFO L78 Accepts]: Start accepts. Automaton has 125853 states and 576525 transitions. Word has length 17 [2021-06-05 13:13:54,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:13:54,022 INFO L482 AbstractCegarLoop]: Abstraction has 125853 states and 576525 transitions. [2021-06-05 13:13:54,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:13:54,022 INFO L276 IsEmpty]: Start isEmpty. Operand 125853 states and 576525 transitions. [2021-06-05 13:13:54,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:13:54,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:13:54,028 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:13:54,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-06-05 13:13:54,028 INFO L430 AbstractCegarLoop]: === Iteration 41 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:13:54,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:13:54,028 INFO L82 PathProgramCache]: Analyzing trace with hash 382462036, now seen corresponding path program 1 times [2021-06-05 13:13:54,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:13:54,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56972829] [2021-06-05 13:13:54,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:13:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:13:54,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:13:54,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:13:54,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56972829] [2021-06-05 13:13:54,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56972829] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:13:54,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:13:54,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:13:54,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257608946] [2021-06-05 13:13:54,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:13:54,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:13:54,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:13:54,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:13:54,050 INFO L87 Difference]: Start difference. First operand 125853 states and 576525 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:13:55,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:13:55,867 INFO L93 Difference]: Finished difference Result 223025 states and 959145 transitions. [2021-06-05 13:13:55,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:13:55,867 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:13:55,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:13:56,582 INFO L225 Difference]: With dead ends: 223025 [2021-06-05 13:13:56,582 INFO L226 Difference]: Without dead ends: 222299 [2021-06-05 13:13:56,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:13:58,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222299 states. [2021-06-05 13:14:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222299 to 124954. [2021-06-05 13:14:01,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124954 states, 124895 states have (on average 4.572665038632452) internal successors, (571103), 124953 states have internal predecessors, (571103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:14:02,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124954 states to 124954 states and 571103 transitions. [2021-06-05 13:14:02,327 INFO L78 Accepts]: Start accepts. Automaton has 124954 states and 571103 transitions. Word has length 17 [2021-06-05 13:14:02,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:14:02,327 INFO L482 AbstractCegarLoop]: Abstraction has 124954 states and 571103 transitions. [2021-06-05 13:14:02,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:14:02,327 INFO L276 IsEmpty]: Start isEmpty. Operand 124954 states and 571103 transitions. [2021-06-05 13:14:02,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:14:02,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:14:02,332 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:14:02,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-06-05 13:14:02,333 INFO L430 AbstractCegarLoop]: === Iteration 42 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:14:02,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:14:02,333 INFO L82 PathProgramCache]: Analyzing trace with hash 382677517, now seen corresponding path program 1 times [2021-06-05 13:14:02,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:14:02,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917358450] [2021-06-05 13:14:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:14:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:14:02,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:14:02,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:14:02,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917358450] [2021-06-05 13:14:02,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917358450] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:14:02,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:14:02,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:14:02,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815959873] [2021-06-05 13:14:02,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:14:02,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:14:02,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:14:02,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:14:02,359 INFO L87 Difference]: Start difference. First operand 124954 states and 571103 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:14:04,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:14:04,370 INFO L93 Difference]: Finished difference Result 224731 states and 963332 transitions. [2021-06-05 13:14:04,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:14:04,371 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:14:04,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:14:05,482 INFO L225 Difference]: With dead ends: 224731 [2021-06-05 13:14:05,482 INFO L226 Difference]: Without dead ends: 223881 [2021-06-05 13:14:05,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:14:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223881 states. [2021-06-05 13:14:10,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223881 to 124229. [2021-06-05 13:14:10,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124229 states, 124170 states have (on average 4.560779576387211) internal successors, (566312), 124228 states have internal predecessors, (566312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:14:11,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124229 states to 124229 states and 566312 transitions. [2021-06-05 13:14:11,313 INFO L78 Accepts]: Start accepts. Automaton has 124229 states and 566312 transitions. Word has length 17 [2021-06-05 13:14:11,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:14:11,314 INFO L482 AbstractCegarLoop]: Abstraction has 124229 states and 566312 transitions. [2021-06-05 13:14:11,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:14:11,314 INFO L276 IsEmpty]: Start isEmpty. Operand 124229 states and 566312 transitions. [2021-06-05 13:14:11,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:14:11,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:14:11,319 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:14:11,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-06-05 13:14:11,319 INFO L430 AbstractCegarLoop]: === Iteration 43 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:14:11,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:14:11,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1799465030, now seen corresponding path program 1 times [2021-06-05 13:14:11,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:14:11,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870922504] [2021-06-05 13:14:11,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:14:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:14:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:14:11,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:14:11,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870922504] [2021-06-05 13:14:11,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870922504] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:14:11,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:14:11,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:14:11,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117823881] [2021-06-05 13:14:11,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:14:11,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:14:11,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:14:11,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:14:11,339 INFO L87 Difference]: Start difference. First operand 124229 states and 566312 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:14:13,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:14:13,051 INFO L93 Difference]: Finished difference Result 222666 states and 954242 transitions. [2021-06-05 13:14:13,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:14:13,052 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:14:13,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:14:13,767 INFO L225 Difference]: With dead ends: 222666 [2021-06-05 13:14:13,768 INFO L226 Difference]: Without dead ends: 221870 [2021-06-05 13:14:13,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:14:15,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221870 states. [2021-06-05 13:14:18,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221870 to 122734. [2021-06-05 13:14:19,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122734 states, 122676 states have (on average 4.5495206886432555) internal successors, (558117), 122733 states have internal predecessors, (558117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:14:19,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122734 states to 122734 states and 558117 transitions. [2021-06-05 13:14:19,467 INFO L78 Accepts]: Start accepts. Automaton has 122734 states and 558117 transitions. Word has length 17 [2021-06-05 13:14:19,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:14:19,467 INFO L482 AbstractCegarLoop]: Abstraction has 122734 states and 558117 transitions. [2021-06-05 13:14:19,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:14:19,467 INFO L276 IsEmpty]: Start isEmpty. Operand 122734 states and 558117 transitions. [2021-06-05 13:14:19,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:14:19,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:14:19,472 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:14:19,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-06-05 13:14:19,472 INFO L430 AbstractCegarLoop]: === Iteration 44 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:14:19,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:14:19,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1799249549, now seen corresponding path program 1 times [2021-06-05 13:14:19,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:14:19,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156986057] [2021-06-05 13:14:19,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:14:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:14:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:14:19,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:14:19,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156986057] [2021-06-05 13:14:19,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156986057] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:14:19,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:14:19,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:14:19,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441273605] [2021-06-05 13:14:19,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:14:19,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:14:19,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:14:19,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:14:19,493 INFO L87 Difference]: Start difference. First operand 122734 states and 558117 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:14:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:14:21,149 INFO L93 Difference]: Finished difference Result 224362 states and 958359 transitions. [2021-06-05 13:14:21,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:14:21,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:14:21,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:14:22,331 INFO L225 Difference]: With dead ends: 224362 [2021-06-05 13:14:22,331 INFO L226 Difference]: Without dead ends: 223512 [2021-06-05 13:14:22,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:14:24,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223512 states. [2021-06-05 13:14:27,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223512 to 121912. [2021-06-05 13:14:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121912 states, 121854 states have (on average 4.535058348515436) internal successors, (552615), 121911 states have internal predecessors, (552615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:14:27,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121912 states to 121912 states and 552615 transitions. [2021-06-05 13:14:27,603 INFO L78 Accepts]: Start accepts. Automaton has 121912 states and 552615 transitions. Word has length 17 [2021-06-05 13:14:27,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:14:27,603 INFO L482 AbstractCegarLoop]: Abstraction has 121912 states and 552615 transitions. [2021-06-05 13:14:27,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:14:27,603 INFO L276 IsEmpty]: Start isEmpty. Operand 121912 states and 552615 transitions. [2021-06-05 13:14:27,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:14:27,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:14:27,608 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:14:27,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-06-05 13:14:27,608 INFO L430 AbstractCegarLoop]: === Iteration 45 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:14:27,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:14:27,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1056304634, now seen corresponding path program 1 times [2021-06-05 13:14:27,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:14:27,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87364518] [2021-06-05 13:14:27,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:14:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:14:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:14:27,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:14:27,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87364518] [2021-06-05 13:14:27,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87364518] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:14:27,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:14:27,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:14:27,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166346781] [2021-06-05 13:14:27,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:14:27,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:14:27,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:14:27,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:14:27,628 INFO L87 Difference]: Start difference. First operand 121912 states and 552615 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:14:29,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:14:29,313 INFO L93 Difference]: Finished difference Result 220853 states and 940183 transitions. [2021-06-05 13:14:29,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:14:29,313 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:14:29,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:14:30,556 INFO L225 Difference]: With dead ends: 220853 [2021-06-05 13:14:30,556 INFO L226 Difference]: Without dead ends: 220071 [2021-06-05 13:14:30,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:14:32,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220071 states. [2021-06-05 13:14:35,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220071 to 120539. [2021-06-05 13:14:35,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120539 states, 120482 states have (on average 4.520351587789047) internal successors, (544621), 120538 states have internal predecessors, (544621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:14:35,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120539 states to 120539 states and 544621 transitions. [2021-06-05 13:14:35,930 INFO L78 Accepts]: Start accepts. Automaton has 120539 states and 544621 transitions. Word has length 17 [2021-06-05 13:14:35,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:14:35,930 INFO L482 AbstractCegarLoop]: Abstraction has 120539 states and 544621 transitions. [2021-06-05 13:14:35,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:14:35,930 INFO L276 IsEmpty]: Start isEmpty. Operand 120539 states and 544621 transitions. [2021-06-05 13:14:35,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:14:35,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:14:35,935 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:14:35,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-06-05 13:14:35,935 INFO L430 AbstractCegarLoop]: === Iteration 46 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:14:35,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:14:35,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1056735596, now seen corresponding path program 1 times [2021-06-05 13:14:35,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:14:35,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136131342] [2021-06-05 13:14:35,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:14:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:14:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:14:35,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:14:35,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136131342] [2021-06-05 13:14:35,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136131342] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:14:35,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:14:35,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:14:35,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64835008] [2021-06-05 13:14:35,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:14:35,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:14:35,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:14:35,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:14:35,965 INFO L87 Difference]: Start difference. First operand 120539 states and 544621 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:14:37,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:14:37,777 INFO L93 Difference]: Finished difference Result 220737 states and 937661 transitions. [2021-06-05 13:14:37,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:14:37,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:14:37,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:14:39,068 INFO L225 Difference]: With dead ends: 220737 [2021-06-05 13:14:39,068 INFO L226 Difference]: Without dead ends: 219831 [2021-06-05 13:14:39,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:14:40,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219831 states. [2021-06-05 13:14:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219831 to 119075. [2021-06-05 13:14:43,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119075 states, 119019 states have (on average 4.502449188784984) internal successors, (535877), 119074 states have internal predecessors, (535877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:14:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119075 states to 119075 states and 535877 transitions. [2021-06-05 13:14:44,319 INFO L78 Accepts]: Start accepts. Automaton has 119075 states and 535877 transitions. Word has length 17 [2021-06-05 13:14:44,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:14:44,319 INFO L482 AbstractCegarLoop]: Abstraction has 119075 states and 535877 transitions. [2021-06-05 13:14:44,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:14:44,319 INFO L276 IsEmpty]: Start isEmpty. Operand 119075 states and 535877 transitions. [2021-06-05 13:14:44,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:14:44,324 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:14:44,324 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:14:44,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-06-05 13:14:44,324 INFO L430 AbstractCegarLoop]: === Iteration 47 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:14:44,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:14:44,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1234521615, now seen corresponding path program 1 times [2021-06-05 13:14:44,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:14:44,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565714687] [2021-06-05 13:14:44,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:14:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:14:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:14:44,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:14:44,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565714687] [2021-06-05 13:14:44,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565714687] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:14:44,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:14:44,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:14:44,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279982795] [2021-06-05 13:14:44,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:14:44,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:14:44,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:14:44,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:14:44,356 INFO L87 Difference]: Start difference. First operand 119075 states and 535877 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:14:46,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:14:46,003 INFO L93 Difference]: Finished difference Result 214252 states and 907397 transitions. [2021-06-05 13:14:46,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:14:46,004 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:14:46,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:14:47,222 INFO L225 Difference]: With dead ends: 214252 [2021-06-05 13:14:47,222 INFO L226 Difference]: Without dead ends: 213526 [2021-06-05 13:14:47,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 53.0ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:14:48,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213526 states. [2021-06-05 13:14:51,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213526 to 117930. [2021-06-05 13:14:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117930 states, 117874 states have (on average 4.488606478103738) internal successors, (529090), 117929 states have internal predecessors, (529090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:14:52,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117930 states to 117930 states and 529090 transitions. [2021-06-05 13:14:52,993 INFO L78 Accepts]: Start accepts. Automaton has 117930 states and 529090 transitions. Word has length 17 [2021-06-05 13:14:52,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:14:52,993 INFO L482 AbstractCegarLoop]: Abstraction has 117930 states and 529090 transitions. [2021-06-05 13:14:52,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:14:52,993 INFO L276 IsEmpty]: Start isEmpty. Operand 117930 states and 529090 transitions. [2021-06-05 13:14:52,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:14:52,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:14:52,998 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:14:52,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-06-05 13:14:52,998 INFO L430 AbstractCegarLoop]: === Iteration 48 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:14:52,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:14:52,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1234952577, now seen corresponding path program 1 times [2021-06-05 13:14:52,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:14:52,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002386926] [2021-06-05 13:14:52,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:14:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:14:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:14:53,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:14:53,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002386926] [2021-06-05 13:14:53,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002386926] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:14:53,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:14:53,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:14:53,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868026466] [2021-06-05 13:14:53,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:14:53,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:14:53,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:14:53,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:14:53,019 INFO L87 Difference]: Start difference. First operand 117930 states and 529090 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:14:54,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:14:54,688 INFO L93 Difference]: Finished difference Result 214264 states and 905450 transitions. [2021-06-05 13:14:54,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:14:54,688 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:14:54,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:14:55,368 INFO L225 Difference]: With dead ends: 214264 [2021-06-05 13:14:55,368 INFO L226 Difference]: Without dead ends: 213414 [2021-06-05 13:14:55,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:14:57,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213414 states. [2021-06-05 13:14:59,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213414 to 117066. [2021-06-05 13:15:00,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117066 states, 117010 states have (on average 4.4707204512434835) internal successors, (523119), 117065 states have internal predecessors, (523119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:15:01,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117066 states to 117066 states and 523119 transitions. [2021-06-05 13:15:01,001 INFO L78 Accepts]: Start accepts. Automaton has 117066 states and 523119 transitions. Word has length 17 [2021-06-05 13:15:01,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:15:01,001 INFO L482 AbstractCegarLoop]: Abstraction has 117066 states and 523119 transitions. [2021-06-05 13:15:01,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:15:01,001 INFO L276 IsEmpty]: Start isEmpty. Operand 117066 states and 523119 transitions. [2021-06-05 13:15:01,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:15:01,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:15:01,006 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:15:01,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-06-05 13:15:01,006 INFO L430 AbstractCegarLoop]: === Iteration 49 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:15:01,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:15:01,006 INFO L82 PathProgramCache]: Analyzing trace with hash 182481379, now seen corresponding path program 1 times [2021-06-05 13:15:01,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:15:01,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943416068] [2021-06-05 13:15:01,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:15:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:15:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:15:01,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:15:01,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943416068] [2021-06-05 13:15:01,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943416068] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:15:01,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:15:01,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:15:01,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465592890] [2021-06-05 13:15:01,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:15:01,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:15:01,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:15:01,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:15:01,029 INFO L87 Difference]: Start difference. First operand 117066 states and 523119 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:15:02,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:15:02,840 INFO L93 Difference]: Finished difference Result 215604 states and 910229 transitions. [2021-06-05 13:15:02,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:15:02,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:15:02,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:15:03,558 INFO L225 Difference]: With dead ends: 215604 [2021-06-05 13:15:03,559 INFO L226 Difference]: Without dead ends: 214684 [2021-06-05 13:15:03,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:15:05,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214684 states. [2021-06-05 13:15:08,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214684 to 115859. [2021-06-05 13:15:08,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115859 states, 115804 states have (on average 4.453999861835515) internal successors, (515791), 115858 states have internal predecessors, (515791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:15:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115859 states to 115859 states and 515791 transitions. [2021-06-05 13:15:08,625 INFO L78 Accepts]: Start accepts. Automaton has 115859 states and 515791 transitions. Word has length 17 [2021-06-05 13:15:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:15:08,625 INFO L482 AbstractCegarLoop]: Abstraction has 115859 states and 515791 transitions. [2021-06-05 13:15:08,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:15:08,626 INFO L276 IsEmpty]: Start isEmpty. Operand 115859 states and 515791 transitions. [2021-06-05 13:15:08,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 13:15:08,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:15:08,631 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:15:08,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-06-05 13:15:08,631 INFO L430 AbstractCegarLoop]: === Iteration 50 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:15:08,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:15:08,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1599053411, now seen corresponding path program 1 times [2021-06-05 13:15:08,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:15:08,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260625305] [2021-06-05 13:15:08,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:15:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:15:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:15:08,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:15:08,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260625305] [2021-06-05 13:15:08,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260625305] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:15:08,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:15:08,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:15:08,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448204722] [2021-06-05 13:15:08,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:15:08,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:15:08,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:15:08,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:15:08,661 INFO L87 Difference]: Start difference. First operand 115859 states and 515791 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:15:10,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:15:10,425 INFO L93 Difference]: Finished difference Result 214338 states and 902172 transitions. [2021-06-05 13:15:10,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:15:10,425 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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 [2021-06-05 13:15:10,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:15:11,766 INFO L225 Difference]: With dead ends: 214338 [2021-06-05 13:15:11,766 INFO L226 Difference]: Without dead ends: 213418 [2021-06-05 13:15:11,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:15:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213418 states. [2021-06-05 13:15:16,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213418 to 114186. [2021-06-05 13:15:16,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114186 states, 114132 states have (on average 4.434488136543651) internal successors, (506117), 114185 states have internal predecessors, (506117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:15:16,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114186 states to 114186 states and 506117 transitions. [2021-06-05 13:15:16,951 INFO L78 Accepts]: Start accepts. Automaton has 114186 states and 506117 transitions. Word has length 17 [2021-06-05 13:15:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:15:16,951 INFO L482 AbstractCegarLoop]: Abstraction has 114186 states and 506117 transitions. [2021-06-05 13:15:16,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 7 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) [2021-06-05 13:15:16,951 INFO L276 IsEmpty]: Start isEmpty. Operand 114186 states and 506117 transitions. [2021-06-05 13:15:16,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:15:16,956 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:15:16,957 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:15:16,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-06-05 13:15:16,957 INFO L430 AbstractCegarLoop]: === Iteration 51 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:15:16,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:15:16,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1085386721, now seen corresponding path program 1 times [2021-06-05 13:15:16,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:15:16,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548856605] [2021-06-05 13:15:16,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:15:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:15:16,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 13:15:16,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:15:16,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548856605] [2021-06-05 13:15:16,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548856605] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:15:16,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:15:16,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:15:16,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040298846] [2021-06-05 13:15:16,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:15:16,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:15:16,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:15:16,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:15:16,992 INFO L87 Difference]: Start difference. First operand 114186 states and 506117 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:15:18,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:15:18,750 INFO L93 Difference]: Finished difference Result 214342 states and 899835 transitions. [2021-06-05 13:15:18,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:15:18,751 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:15:18,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:15:19,441 INFO L225 Difference]: With dead ends: 214342 [2021-06-05 13:15:19,442 INFO L226 Difference]: Without dead ends: 213392 [2021-06-05 13:15:19,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:15:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213392 states. [2021-06-05 13:15:23,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213392 to 114526. [2021-06-05 13:15:24,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114526 states, 114472 states have (on average 4.425527639946886) internal successors, (506599), 114525 states have internal predecessors, (506599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:15:24,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114526 states to 114526 states and 506599 transitions. [2021-06-05 13:15:24,995 INFO L78 Accepts]: Start accepts. Automaton has 114526 states and 506599 transitions. Word has length 18 [2021-06-05 13:15:24,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:15:24,995 INFO L482 AbstractCegarLoop]: Abstraction has 114526 states and 506599 transitions. [2021-06-05 13:15:24,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:15:24,995 INFO L276 IsEmpty]: Start isEmpty. Operand 114526 states and 506599 transitions. [2021-06-05 13:15:25,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:15:25,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:15:25,001 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:15:25,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2021-06-05 13:15:25,001 INFO L430 AbstractCegarLoop]: === Iteration 52 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:15:25,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:15:25,001 INFO L82 PathProgramCache]: Analyzing trace with hash -536149151, now seen corresponding path program 1 times [2021-06-05 13:15:25,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:15:25,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472464882] [2021-06-05 13:15:25,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:15:25,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:15:25,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:15:25,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:15:25,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472464882] [2021-06-05 13:15:25,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472464882] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:15:25,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:15:25,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:15:25,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560648208] [2021-06-05 13:15:25,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:15:25,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:15:25,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:15:25,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:15:25,039 INFO L87 Difference]: Start difference. First operand 114526 states and 506599 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:15:26,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:15:26,724 INFO L93 Difference]: Finished difference Result 214323 states and 898152 transitions. [2021-06-05 13:15:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:15:26,724 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:15:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:15:27,382 INFO L225 Difference]: With dead ends: 214323 [2021-06-05 13:15:27,382 INFO L226 Difference]: Without dead ends: 213373 [2021-06-05 13:15:27,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:15:29,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213373 states. [2021-06-05 13:15:31,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213373 to 114378. [2021-06-05 13:15:31,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114378 states, 114324 states have (on average 4.414742311325706) internal successors, (504711), 114377 states have internal predecessors, (504711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:15:32,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114378 states to 114378 states and 504711 transitions. [2021-06-05 13:15:32,351 INFO L78 Accepts]: Start accepts. Automaton has 114378 states and 504711 transitions. Word has length 18 [2021-06-05 13:15:32,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:15:32,351 INFO L482 AbstractCegarLoop]: Abstraction has 114378 states and 504711 transitions. [2021-06-05 13:15:32,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:15:32,351 INFO L276 IsEmpty]: Start isEmpty. Operand 114378 states and 504711 transitions. [2021-06-05 13:15:32,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:15:32,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:15:32,357 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:15:32,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2021-06-05 13:15:32,357 INFO L430 AbstractCegarLoop]: === Iteration 53 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:15:32,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:15:32,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1975131302, now seen corresponding path program 1 times [2021-06-05 13:15:32,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:15:32,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869847035] [2021-06-05 13:15:32,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:15:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:15:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:15:32,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:15:32,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869847035] [2021-06-05 13:15:32,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869847035] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:15:32,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:15:32,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:15:32,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295821422] [2021-06-05 13:15:32,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:15:32,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:15:32,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:15:32,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:15:32,377 INFO L87 Difference]: Start difference. First operand 114378 states and 504711 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:15:34,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:15:34,526 INFO L93 Difference]: Finished difference Result 205816 states and 861262 transitions. [2021-06-05 13:15:34,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:15:34,527 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:15:34,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:15:35,328 INFO L225 Difference]: With dead ends: 205816 [2021-06-05 13:15:35,328 INFO L226 Difference]: Without dead ends: 204992 [2021-06-05 13:15:35,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:15:37,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204992 states. [2021-06-05 13:15:39,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204992 to 114241. [2021-06-05 13:15:40,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114241 states, 114187 states have (on average 4.408242619562647) internal successors, (503364), 114240 states have internal predecessors, (503364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:15:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114241 states to 114241 states and 503364 transitions. [2021-06-05 13:15:40,937 INFO L78 Accepts]: Start accepts. Automaton has 114241 states and 503364 transitions. Word has length 18 [2021-06-05 13:15:40,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:15:40,937 INFO L482 AbstractCegarLoop]: Abstraction has 114241 states and 503364 transitions. [2021-06-05 13:15:40,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:15:40,937 INFO L276 IsEmpty]: Start isEmpty. Operand 114241 states and 503364 transitions. [2021-06-05 13:15:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:15:40,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:15:40,943 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:15:40,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2021-06-05 13:15:40,943 INFO L430 AbstractCegarLoop]: === Iteration 54 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:15:40,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:15:40,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1975562264, now seen corresponding path program 1 times [2021-06-05 13:15:40,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:15:40,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821596159] [2021-06-05 13:15:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:15:40,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:15:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:15:41,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:15:41,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821596159] [2021-06-05 13:15:41,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821596159] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:15:41,001 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:15:41,001 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:15:41,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907907031] [2021-06-05 13:15:41,001 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:15:41,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:15:41,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:15:41,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:15:41,001 INFO L87 Difference]: Start difference. First operand 114241 states and 503364 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:15:42,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:15:42,752 INFO L93 Difference]: Finished difference Result 205586 states and 858596 transitions. [2021-06-05 13:15:42,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:15:42,752 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:15:42,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:15:43,479 INFO L225 Difference]: With dead ends: 205586 [2021-06-05 13:15:43,479 INFO L226 Difference]: Without dead ends: 204628 [2021-06-05 13:15:43,479 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 41.8ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:15:45,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204628 states. [2021-06-05 13:15:48,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204628 to 114201. [2021-06-05 13:15:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114201 states, 114147 states have (on average 4.400807730382752) internal successors, (502339), 114200 states have internal predecessors, (502339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:15:48,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114201 states to 114201 states and 502339 transitions. [2021-06-05 13:15:48,550 INFO L78 Accepts]: Start accepts. Automaton has 114201 states and 502339 transitions. Word has length 18 [2021-06-05 13:15:48,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:15:48,550 INFO L482 AbstractCegarLoop]: Abstraction has 114201 states and 502339 transitions. [2021-06-05 13:15:48,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:15:48,550 INFO L276 IsEmpty]: Start isEmpty. Operand 114201 states and 502339 transitions. [2021-06-05 13:15:48,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:15:48,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:15:48,556 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:15:48,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2021-06-05 13:15:48,556 INFO L430 AbstractCegarLoop]: === Iteration 55 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:15:48,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:15:48,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1975777745, now seen corresponding path program 1 times [2021-06-05 13:15:48,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:15:48,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063224070] [2021-06-05 13:15:48,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:15:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:15:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:15:48,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:15:48,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063224070] [2021-06-05 13:15:48,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063224070] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:15:48,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:15:48,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:15:48,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798736250] [2021-06-05 13:15:48,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:15:48,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:15:48,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:15:48,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:15:48,581 INFO L87 Difference]: Start difference. First operand 114201 states and 502339 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:15:50,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:15:50,171 INFO L93 Difference]: Finished difference Result 204550 states and 852464 transitions. [2021-06-05 13:15:50,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:15:50,171 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:15:50,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:15:50,800 INFO L225 Difference]: With dead ends: 204550 [2021-06-05 13:15:50,800 INFO L226 Difference]: Without dead ends: 203536 [2021-06-05 13:15:50,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.6ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:15:52,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203536 states. [2021-06-05 13:15:55,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203536 to 114511. [2021-06-05 13:15:55,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114511 states, 114457 states have (on average 4.392584114558305) internal successors, (502762), 114510 states have internal predecessors, (502762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:15:55,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114511 states to 114511 states and 502762 transitions. [2021-06-05 13:15:55,576 INFO L78 Accepts]: Start accepts. Automaton has 114511 states and 502762 transitions. Word has length 18 [2021-06-05 13:15:55,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:15:55,576 INFO L482 AbstractCegarLoop]: Abstraction has 114511 states and 502762 transitions. [2021-06-05 13:15:55,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:15:55,576 INFO L276 IsEmpty]: Start isEmpty. Operand 114511 states and 502762 transitions. [2021-06-05 13:15:55,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:15:55,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:15:55,582 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:15:55,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2021-06-05 13:15:55,582 INFO L430 AbstractCegarLoop]: === Iteration 56 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:15:55,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:15:55,582 INFO L82 PathProgramCache]: Analyzing trace with hash -558774751, now seen corresponding path program 1 times [2021-06-05 13:15:55,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:15:55,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680170817] [2021-06-05 13:15:55,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:15:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:15:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 13:15:55,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:15:55,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680170817] [2021-06-05 13:15:55,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680170817] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:15:55,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:15:55,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:15:55,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102217976] [2021-06-05 13:15:55,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:15:55,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:15:55,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:15:55,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:15:55,602 INFO L87 Difference]: Start difference. First operand 114511 states and 502762 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:15:57,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:15:57,900 INFO L93 Difference]: Finished difference Result 213342 states and 889373 transitions. [2021-06-05 13:15:57,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:15:57,909 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:15:57,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:15:58,675 INFO L225 Difference]: With dead ends: 213342 [2021-06-05 13:15:58,676 INFO L226 Difference]: Without dead ends: 212328 [2021-06-05 13:15:58,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:16:00,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212328 states. [2021-06-05 13:16:03,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212328 to 113936. [2021-06-05 13:16:03,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113936 states, 113882 states have (on average 4.381429901125727) internal successors, (498966), 113935 states have internal predecessors, (498966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:16:03,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113936 states to 113936 states and 498966 transitions. [2021-06-05 13:16:03,845 INFO L78 Accepts]: Start accepts. Automaton has 113936 states and 498966 transitions. Word has length 18 [2021-06-05 13:16:03,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:16:03,846 INFO L482 AbstractCegarLoop]: Abstraction has 113936 states and 498966 transitions. [2021-06-05 13:16:03,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:16:03,846 INFO L276 IsEmpty]: Start isEmpty. Operand 113936 states and 498966 transitions. [2021-06-05 13:16:03,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:16:03,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:16:03,851 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:16:03,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2021-06-05 13:16:03,851 INFO L430 AbstractCegarLoop]: === Iteration 57 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:16:03,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:16:03,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1190678545, now seen corresponding path program 1 times [2021-06-05 13:16:03,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:16:03,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248294272] [2021-06-05 13:16:03,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:16:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:16:03,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:16:03,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:16:03,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248294272] [2021-06-05 13:16:03,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248294272] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:16:03,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:16:03,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:16:03,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480005649] [2021-06-05 13:16:03,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:16:03,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:16:03,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:16:03,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:16:03,881 INFO L87 Difference]: Start difference. First operand 113936 states and 498966 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:16:05,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:16:05,490 INFO L93 Difference]: Finished difference Result 206782 states and 858777 transitions. [2021-06-05 13:16:05,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:16:05,490 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:16:05,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:16:06,171 INFO L225 Difference]: With dead ends: 206782 [2021-06-05 13:16:06,171 INFO L226 Difference]: Without dead ends: 205832 [2021-06-05 13:16:06,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 57.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:16:08,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205832 states. [2021-06-05 13:16:10,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205832 to 114196. [2021-06-05 13:16:10,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114196 states, 114142 states have (on average 4.371318182614638) internal successors, (498951), 114195 states have internal predecessors, (498951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:16:10,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114196 states to 114196 states and 498951 transitions. [2021-06-05 13:16:10,979 INFO L78 Accepts]: Start accepts. Automaton has 114196 states and 498951 transitions. Word has length 18 [2021-06-05 13:16:10,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:16:10,979 INFO L482 AbstractCegarLoop]: Abstraction has 114196 states and 498951 transitions. [2021-06-05 13:16:10,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:16:10,979 INFO L276 IsEmpty]: Start isEmpty. Operand 114196 states and 498951 transitions. [2021-06-05 13:16:10,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:16:10,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:16:10,985 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:16:10,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2021-06-05 13:16:10,985 INFO L430 AbstractCegarLoop]: === Iteration 58 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:16:10,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:16:10,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1661662959, now seen corresponding path program 1 times [2021-06-05 13:16:10,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:16:10,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655910808] [2021-06-05 13:16:10,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:16:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:16:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:16:11,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:16:11,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655910808] [2021-06-05 13:16:11,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655910808] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:16:11,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:16:11,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:16:11,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812343940] [2021-06-05 13:16:11,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:16:11,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:16:11,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:16:11,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:16:11,016 INFO L87 Difference]: Start difference. First operand 114196 states and 498951 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:16:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:16:12,778 INFO L93 Difference]: Finished difference Result 209378 states and 867364 transitions. [2021-06-05 13:16:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:16:12,778 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:16:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:16:14,100 INFO L225 Difference]: With dead ends: 209378 [2021-06-05 13:16:14,101 INFO L226 Difference]: Without dead ends: 208360 [2021-06-05 13:16:14,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:16:15,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208360 states. [2021-06-05 13:16:18,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208360 to 113823. [2021-06-05 13:16:18,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113823 states, 113769 states have (on average 4.3586917350069) internal successors, (495884), 113822 states have internal predecessors, (495884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:16:19,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113823 states to 113823 states and 495884 transitions. [2021-06-05 13:16:19,154 INFO L78 Accepts]: Start accepts. Automaton has 113823 states and 495884 transitions. Word has length 18 [2021-06-05 13:16:19,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:16:19,154 INFO L482 AbstractCegarLoop]: Abstraction has 113823 states and 495884 transitions. [2021-06-05 13:16:19,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:16:19,154 INFO L276 IsEmpty]: Start isEmpty. Operand 113823 states and 495884 transitions. [2021-06-05 13:16:19,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:16:19,160 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:16:19,160 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:16:19,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2021-06-05 13:16:19,160 INFO L430 AbstractCegarLoop]: === Iteration 59 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:16:19,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:16:19,160 INFO L82 PathProgramCache]: Analyzing trace with hash 222680808, now seen corresponding path program 1 times [2021-06-05 13:16:19,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:16:19,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496713837] [2021-06-05 13:16:19,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:16:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:16:19,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:16:19,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:16:19,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496713837] [2021-06-05 13:16:19,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496713837] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:16:19,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:16:19,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:16:19,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797421233] [2021-06-05 13:16:19,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:16:19,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:16:19,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:16:19,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:16:19,189 INFO L87 Difference]: Start difference. First operand 113823 states and 495884 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:16:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:16:20,929 INFO L93 Difference]: Finished difference Result 202412 states and 837166 transitions. [2021-06-05 13:16:20,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:16:20,929 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:16:20,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:16:21,810 INFO L225 Difference]: With dead ends: 202412 [2021-06-05 13:16:21,811 INFO L226 Difference]: Without dead ends: 201588 [2021-06-05 13:16:21,811 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:16:23,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201588 states. [2021-06-05 13:16:26,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201588 to 113209. [2021-06-05 13:16:26,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113209 states, 113155 states have (on average 4.3510582828863065) internal successors, (492344), 113208 states have internal predecessors, (492344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:16:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113209 states to 113209 states and 492344 transitions. [2021-06-05 13:16:26,666 INFO L78 Accepts]: Start accepts. Automaton has 113209 states and 492344 transitions. Word has length 18 [2021-06-05 13:16:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:16:26,666 INFO L482 AbstractCegarLoop]: Abstraction has 113209 states and 492344 transitions. [2021-06-05 13:16:26,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:16:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 113209 states and 492344 transitions. [2021-06-05 13:16:26,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:16:26,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:16:26,672 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:16:26,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2021-06-05 13:16:26,672 INFO L430 AbstractCegarLoop]: === Iteration 60 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:16:26,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:16:26,673 INFO L82 PathProgramCache]: Analyzing trace with hash 221818884, now seen corresponding path program 1 times [2021-06-05 13:16:26,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:16:26,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818549963] [2021-06-05 13:16:26,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:16:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:16:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:16:26,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:16:26,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818549963] [2021-06-05 13:16:26,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818549963] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:16:26,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:16:26,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:16:26,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774784680] [2021-06-05 13:16:26,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:16:26,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:16:26,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:16:26,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:16:26,703 INFO L87 Difference]: Start difference. First operand 113209 states and 492344 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:16:28,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:16:28,285 INFO L93 Difference]: Finished difference Result 200589 states and 828764 transitions. [2021-06-05 13:16:28,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:16:28,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:16:28,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:16:28,919 INFO L225 Difference]: With dead ends: 200589 [2021-06-05 13:16:28,919 INFO L226 Difference]: Without dead ends: 199631 [2021-06-05 13:16:28,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:16:30,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199631 states. [2021-06-05 13:16:33,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199631 to 113055. [2021-06-05 13:16:33,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113055 states, 113001 states have (on average 4.343395191192998) internal successors, (490808), 113054 states have internal predecessors, (490808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:16:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113055 states to 113055 states and 490808 transitions. [2021-06-05 13:16:33,693 INFO L78 Accepts]: Start accepts. Automaton has 113055 states and 490808 transitions. Word has length 18 [2021-06-05 13:16:33,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:16:33,694 INFO L482 AbstractCegarLoop]: Abstraction has 113055 states and 490808 transitions. [2021-06-05 13:16:33,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:16:33,694 INFO L276 IsEmpty]: Start isEmpty. Operand 113055 states and 490808 transitions. [2021-06-05 13:16:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:16:33,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:16:33,700 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:16:33,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2021-06-05 13:16:33,700 INFO L430 AbstractCegarLoop]: === Iteration 61 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:16:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:16:33,700 INFO L82 PathProgramCache]: Analyzing trace with hash 222034365, now seen corresponding path program 1 times [2021-06-05 13:16:33,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:16:33,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848971428] [2021-06-05 13:16:33,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:16:33,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:16:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:16:33,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:16:33,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848971428] [2021-06-05 13:16:33,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848971428] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:16:33,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:16:33,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:16:33,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882097483] [2021-06-05 13:16:33,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:16:33,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:16:33,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:16:33,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:16:33,725 INFO L87 Difference]: Start difference. First operand 113055 states and 490808 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:16:35,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:16:35,349 INFO L93 Difference]: Finished difference Result 201086 states and 828028 transitions. [2021-06-05 13:16:35,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:16:35,349 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:16:35,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:16:36,650 INFO L225 Difference]: With dead ends: 201086 [2021-06-05 13:16:36,650 INFO L226 Difference]: Without dead ends: 200072 [2021-06-05 13:16:36,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:16:38,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200072 states. [2021-06-05 13:16:40,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200072 to 113059. [2021-06-05 13:16:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113059 states, 113005 states have (on average 4.334640060174329) internal successors, (489836), 113058 states have internal predecessors, (489836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:16:41,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113059 states to 113059 states and 489836 transitions. [2021-06-05 13:16:41,748 INFO L78 Accepts]: Start accepts. Automaton has 113059 states and 489836 transitions. Word has length 18 [2021-06-05 13:16:41,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:16:41,748 INFO L482 AbstractCegarLoop]: Abstraction has 113059 states and 489836 transitions. [2021-06-05 13:16:41,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:16:41,748 INFO L276 IsEmpty]: Start isEmpty. Operand 113059 states and 489836 transitions. [2021-06-05 13:16:41,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:16:41,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:16:41,754 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:16:41,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2021-06-05 13:16:41,754 INFO L430 AbstractCegarLoop]: === Iteration 62 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:16:41,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:16:41,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1639037359, now seen corresponding path program 1 times [2021-06-05 13:16:41,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:16:41,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973636675] [2021-06-05 13:16:41,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:16:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:16:41,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 13:16:41,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:16:41,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973636675] [2021-06-05 13:16:41,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973636675] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:16:41,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:16:41,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:16:41,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991527986] [2021-06-05 13:16:41,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:16:41,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:16:41,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:16:41,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:16:41,773 INFO L87 Difference]: Start difference. First operand 113059 states and 489836 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:16:43,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:16:43,324 INFO L93 Difference]: Finished difference Result 207224 states and 853139 transitions. [2021-06-05 13:16:43,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:16:43,324 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:16:43,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:16:43,950 INFO L225 Difference]: With dead ends: 207224 [2021-06-05 13:16:43,950 INFO L226 Difference]: Without dead ends: 206142 [2021-06-05 13:16:43,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:16:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206142 states. [2021-06-05 13:16:48,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206142 to 112062. [2021-06-05 13:16:48,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112062 states, 112008 states have (on average 4.321307406613814) internal successors, (484021), 112061 states have internal predecessors, (484021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:16:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112062 states to 112062 states and 484021 transitions. [2021-06-05 13:16:48,716 INFO L78 Accepts]: Start accepts. Automaton has 112062 states and 484021 transitions. Word has length 18 [2021-06-05 13:16:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:16:48,716 INFO L482 AbstractCegarLoop]: Abstraction has 112062 states and 484021 transitions. [2021-06-05 13:16:48,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:16:48,716 INFO L276 IsEmpty]: Start isEmpty. Operand 112062 states and 484021 transitions. [2021-06-05 13:16:48,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:16:48,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:16:48,722 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:16:48,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2021-06-05 13:16:48,722 INFO L430 AbstractCegarLoop]: === Iteration 63 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:16:48,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:16:48,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1694648579, now seen corresponding path program 1 times [2021-06-05 13:16:48,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:16:48,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582743843] [2021-06-05 13:16:48,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:16:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:16:48,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 13:16:48,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:16:48,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582743843] [2021-06-05 13:16:48,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582743843] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:16:48,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:16:48,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:16:48,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163300750] [2021-06-05 13:16:48,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:16:48,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:16:48,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:16:48,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:16:48,755 INFO L87 Difference]: Start difference. First operand 112062 states and 484021 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:16:50,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:16:50,376 INFO L93 Difference]: Finished difference Result 199777 states and 818728 transitions. [2021-06-05 13:16:50,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:16:50,377 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:16:50,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:16:50,997 INFO L225 Difference]: With dead ends: 199777 [2021-06-05 13:16:50,997 INFO L226 Difference]: Without dead ends: 198759 [2021-06-05 13:16:50,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:16:52,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198759 states. [2021-06-05 13:16:55,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198759 to 112129. [2021-06-05 13:16:55,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112129 states, 112075 states have (on average 4.308472005353558) internal successors, (482872), 112128 states have internal predecessors, (482872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:16:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112129 states to 112129 states and 482872 transitions. [2021-06-05 13:16:55,733 INFO L78 Accepts]: Start accepts. Automaton has 112129 states and 482872 transitions. Word has length 18 [2021-06-05 13:16:55,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:16:55,733 INFO L482 AbstractCegarLoop]: Abstraction has 112129 states and 482872 transitions. [2021-06-05 13:16:55,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:16:55,733 INFO L276 IsEmpty]: Start isEmpty. Operand 112129 states and 482872 transitions. [2021-06-05 13:16:55,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:16:55,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:16:55,739 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:16:55,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2021-06-05 13:16:55,739 INFO L430 AbstractCegarLoop]: === Iteration 64 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:16:55,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:16:55,739 INFO L82 PathProgramCache]: Analyzing trace with hash -278076547, now seen corresponding path program 1 times [2021-06-05 13:16:55,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:16:55,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712806221] [2021-06-05 13:16:55,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:16:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:16:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 13:16:55,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:16:55,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712806221] [2021-06-05 13:16:55,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712806221] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:16:55,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:16:55,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:16:55,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273815241] [2021-06-05 13:16:55,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:16:55,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:16:55,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:16:55,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:16:55,763 INFO L87 Difference]: Start difference. First operand 112129 states and 482872 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:16:57,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:16:57,343 INFO L93 Difference]: Finished difference Result 199876 states and 817240 transitions. [2021-06-05 13:16:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:16:57,344 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:16:57,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:16:58,589 INFO L225 Difference]: With dead ends: 199876 [2021-06-05 13:16:58,589 INFO L226 Difference]: Without dead ends: 198858 [2021-06-05 13:16:58,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:17:00,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198858 states. [2021-06-05 13:17:02,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198858 to 111777. [2021-06-05 13:17:02,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111777 states, 111723 states have (on average 4.294514110791869) internal successors, (479796), 111776 states have internal predecessors, (479796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:17:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111777 states to 111777 states and 479796 transitions. [2021-06-05 13:17:03,536 INFO L78 Accepts]: Start accepts. Automaton has 111777 states and 479796 transitions. Word has length 18 [2021-06-05 13:17:03,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:17:03,537 INFO L482 AbstractCegarLoop]: Abstraction has 111777 states and 479796 transitions. [2021-06-05 13:17:03,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:17:03,537 INFO L276 IsEmpty]: Start isEmpty. Operand 111777 states and 479796 transitions. [2021-06-05 13:17:03,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:17:03,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:17:03,543 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:17:03,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2021-06-05 13:17:03,543 INFO L430 AbstractCegarLoop]: === Iteration 65 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:17:03,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:17:03,543 INFO L82 PathProgramCache]: Analyzing trace with hash -255666428, now seen corresponding path program 1 times [2021-06-05 13:17:03,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:17:03,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940397070] [2021-06-05 13:17:03,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:17:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:17:03,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 13:17:03,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:17:03,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940397070] [2021-06-05 13:17:03,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940397070] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:17:03,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:17:03,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:17:03,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164725108] [2021-06-05 13:17:03,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:17:03,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:17:03,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:17:03,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:17:03,583 INFO L87 Difference]: Start difference. First operand 111777 states and 479796 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:17:05,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:17:05,203 INFO L93 Difference]: Finished difference Result 195593 states and 798819 transitions. [2021-06-05 13:17:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:17:05,204 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:17:05,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:17:06,395 INFO L225 Difference]: With dead ends: 195593 [2021-06-05 13:17:06,396 INFO L226 Difference]: Without dead ends: 194785 [2021-06-05 13:17:06,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:17:08,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194785 states. [2021-06-05 13:17:10,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194785 to 111065. [2021-06-05 13:17:10,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111065 states, 111011 states have (on average 4.28635900946753) internal successors, (475833), 111064 states have internal predecessors, (475833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:17:11,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111065 states to 111065 states and 475833 transitions. [2021-06-05 13:17:11,565 INFO L78 Accepts]: Start accepts. Automaton has 111065 states and 475833 transitions. Word has length 18 [2021-06-05 13:17:11,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:17:11,565 INFO L482 AbstractCegarLoop]: Abstraction has 111065 states and 475833 transitions. [2021-06-05 13:17:11,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:17:11,565 INFO L276 IsEmpty]: Start isEmpty. Operand 111065 states and 475833 transitions. [2021-06-05 13:17:11,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:17:11,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:17:11,587 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:17:11,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2021-06-05 13:17:11,588 INFO L430 AbstractCegarLoop]: === Iteration 66 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:17:11,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:17:11,588 INFO L82 PathProgramCache]: Analyzing trace with hash -256097390, now seen corresponding path program 1 times [2021-06-05 13:17:11,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:17:11,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657002374] [2021-06-05 13:17:11,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:17:11,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:17:11,620 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 13:17:11,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:17:11,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657002374] [2021-06-05 13:17:11,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657002374] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:17:11,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:17:11,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:17:11,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671060246] [2021-06-05 13:17:11,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:17:11,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:17:11,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:17:11,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:17:11,621 INFO L87 Difference]: Start difference. First operand 111065 states and 475833 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:17:13,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:17:13,131 INFO L93 Difference]: Finished difference Result 195286 states and 795732 transitions. [2021-06-05 13:17:13,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:17:13,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:17:13,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:17:13,777 INFO L225 Difference]: With dead ends: 195286 [2021-06-05 13:17:13,777 INFO L226 Difference]: Without dead ends: 194328 [2021-06-05 13:17:13,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:17:15,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194328 states. [2021-06-05 13:17:17,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194328 to 110434. [2021-06-05 13:17:17,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110434 states, 110380 states have (on average 4.277079181011053) internal successors, (472104), 110433 states have internal predecessors, (472104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:17:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110434 states to 110434 states and 472104 transitions. [2021-06-05 13:17:18,564 INFO L78 Accepts]: Start accepts. Automaton has 110434 states and 472104 transitions. Word has length 18 [2021-06-05 13:17:18,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:17:18,564 INFO L482 AbstractCegarLoop]: Abstraction has 110434 states and 472104 transitions. [2021-06-05 13:17:18,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:17:18,564 INFO L276 IsEmpty]: Start isEmpty. Operand 110434 states and 472104 transitions. [2021-06-05 13:17:18,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:17:18,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:17:18,570 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:17:18,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2021-06-05 13:17:18,570 INFO L430 AbstractCegarLoop]: === Iteration 67 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:17:18,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:17:18,571 INFO L82 PathProgramCache]: Analyzing trace with hash -255881909, now seen corresponding path program 1 times [2021-06-05 13:17:18,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:17:18,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380410094] [2021-06-05 13:17:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:17:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:17:18,610 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 13:17:18,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:17:18,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380410094] [2021-06-05 13:17:18,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380410094] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:17:18,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:17:18,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:17:18,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123218934] [2021-06-05 13:17:18,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:17:18,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:17:18,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:17:18,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:17:18,611 INFO L87 Difference]: Start difference. First operand 110434 states and 472104 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:17:20,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:17:20,154 INFO L93 Difference]: Finished difference Result 195711 states and 794801 transitions. [2021-06-05 13:17:20,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:17:20,169 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:17:20,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:17:20,694 INFO L225 Difference]: With dead ends: 195711 [2021-06-05 13:17:20,694 INFO L226 Difference]: Without dead ends: 194697 [2021-06-05 13:17:20,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-05 13:17:22,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194697 states. [2021-06-05 13:17:24,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194697 to 110081. [2021-06-05 13:17:24,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110081 states, 110027 states have (on average 4.267261672135022) internal successors, (469514), 110080 states have internal predecessors, (469514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 13:17:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110081 states to 110081 states and 469514 transitions. [2021-06-05 13:17:25,449 INFO L78 Accepts]: Start accepts. Automaton has 110081 states and 469514 transitions. Word has length 18 [2021-06-05 13:17:25,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 13:17:25,449 INFO L482 AbstractCegarLoop]: Abstraction has 110081 states and 469514 transitions. [2021-06-05 13:17:25,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:17:25,449 INFO L276 IsEmpty]: Start isEmpty. Operand 110081 states and 469514 transitions. [2021-06-05 13:17:25,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 13:17:25,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 13:17:25,455 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 13:17:25,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2021-06-05 13:17:25,455 INFO L430 AbstractCegarLoop]: === Iteration 68 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 13:17:25,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 13:17:25,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1161121085, now seen corresponding path program 1 times [2021-06-05 13:17:25,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 13:17:25,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826348181] [2021-06-05 13:17:25,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 13:17:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 13:17:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-05 13:17:25,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 13:17:25,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826348181] [2021-06-05 13:17:25,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826348181] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 13:17:25,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 13:17:25,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 13:17:25,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675492959] [2021-06-05 13:17:25,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 13:17:25,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 13:17:25,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 13:17:25,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 13:17:25,477 INFO L87 Difference]: Start difference. First operand 110081 states and 469514 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2021-06-05 13:17:27,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 13:17:27,033 INFO L93 Difference]: Finished difference Result 198759 states and 806516 transitions. [2021-06-05 13:17:27,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 13:17:27,033 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2021-06-05 13:17:27,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 13:17:27,610 INFO L225 Difference]: With dead ends: 198759 [2021-06-05 13:17:27,610 INFO L226 Difference]: Without dead ends: 197609 [2021-06-05 13:17:27,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 Received shutdown request... [2021-06-05 13:17:29,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197609 states. [2021-06-05 13:17:29,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2021-06-05 13:17:29,296 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 13:17:29,296 INFO L315 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2021-06-05 13:17:29,296 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-06-05 13:17:29,296 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 13:17:29,296 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 13:17:29,296 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 13:17:29,296 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 13:17:29,296 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 13:17:29,296 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 13:17:29,296 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 13:17:29,296 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == InUseError======== [2021-06-05 13:17:29,297 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 54 places, 43 transitions, 131 flow [2021-06-05 13:17:29,297 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 13:17:29,297 INFO L315 ceAbstractionStarter]: Result for error location InUseError was TIMEOUT (2/2) [2021-06-05 13:17:29,297 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 5 thread instances [2021-06-05 13:17:29,299 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 13:17:29,300 INFO L202 PluginConnector]: Adding new model pthread_inc.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 01:17:29 BasicIcfg [2021-06-05 13:17:29,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 13:17:29,300 INFO L168 Benchmark]: Toolchain (without parser) took 644419.88 ms. Allocated memory was 411.0 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 392.8 MB in the beginning and 11.4 GB in the end (delta: -11.0 GB). Peak memory consumption was 4.6 GB. Max. memory is 16.0 GB. [2021-06-05 13:17:29,300 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 411.0 MB. Free memory is still 393.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:17:29,300 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.56 ms. Allocated memory is still 411.0 MB. Free memory was 392.7 MB in the beginning and 391.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 13:17:29,300 INFO L168 Benchmark]: Boogie Preprocessor took 10.46 ms. Allocated memory is still 411.0 MB. Free memory was 391.2 MB in the beginning and 390.3 MB in the end (delta: 889.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 13:17:29,300 INFO L168 Benchmark]: RCFGBuilder took 186.43 ms. Allocated memory is still 411.0 MB. Free memory was 390.3 MB in the beginning and 380.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 13:17:29,301 INFO L168 Benchmark]: TraceAbstraction took 644198.58 ms. Allocated memory was 411.0 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 379.9 MB in the beginning and 11.4 GB in the end (delta: -11.0 GB). Peak memory consumption was 4.6 GB. Max. memory is 16.0 GB. [2021-06-05 13:17:29,301 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 0.10 ms. Allocated memory is still 411.0 MB. Free memory is still 393.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.56 ms. Allocated memory is still 411.0 MB. Free memory was 392.7 MB in the beginning and 391.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.46 ms. Allocated memory is still 411.0 MB. Free memory was 391.2 MB in the beginning and 390.3 MB in the end (delta: 889.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 186.43 ms. Allocated memory is still 411.0 MB. Free memory was 390.3 MB in the beginning and 380.4 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 644198.58 ms. Allocated memory was 411.0 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 379.9 MB in the beginning and 11.4 GB in the end (delta: -11.0 GB). Peak memory consumption was 4.6 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 22]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 30]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing initial abstraction,while PetriNet2FiniteAutomaton was constructing automaton for Petri net that has has 54 places, 43 transitions, 131 flow. Already constructed 2 states. Currently 1 states in worklist.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 174.6ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 4.3ms, AutomataDifference: 38.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 11 SDtfs, 4 SDslu, 4 SDs, 0 SdLazy, 3 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4.9ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 5.4ms SsaConstructionTime, 10.7ms SatisfiabilityAnalysisTime, 28.2ms InterpolantComputationTime, 7 NumberOfCodeBlocks, 7 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 14 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 28 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 352.9ms, OverallIterations: 5, TraceHistogramMax: 1, EmptinessCheckTime: 8.5ms, AutomataDifference: 166.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 16.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 111 SDtfs, 66 SDslu, 83 SDs, 0 SdLazy, 70 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 61.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=211occurred in iteration=0, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 43.8ms AutomataMinimizationTime, 5 MinimizatonAttempts, 18 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 3.4ms SsaConstructionTime, 12.3ms SatisfiabilityAnalysisTime, 77.1ms InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 103 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 4/4 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 - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 36 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1949.5ms, OverallIterations: 16, TraceHistogramMax: 1, EmptinessCheckTime: 16.4ms, AutomataDifference: 979.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 58.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 690 SDtfs, 746 SDslu, 900 SDs, 0 SdLazy, 763 SolverSat, 89 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 396.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 416.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2194occurred in iteration=4, InterpolantAutomatonStates: 90, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 372.5ms AutomataMinimizationTime, 16 MinimizatonAttempts, 3487 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.8ms SsaConstructionTime, 52.2ms SatisfiabilityAnalysisTime, 374.2ms InterpolantComputationTime, 201 NumberOfCodeBlocks, 201 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 185 ConstructedInterpolants, 0 QuantifiedInterpolants, 549 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 37/37 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 - StatisticsResult: Ultimate Automizer benchmark data with 4 thread instances CFG has 6 procedures, 44 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 25481.8ms, OverallIterations: 65, TraceHistogramMax: 1, EmptinessCheckTime: 119.2ms, AutomataDifference: 11397.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 736.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4670 SDtfs, 7043 SDslu, 12092 SDs, 0 SdLazy, 9602 SolverSat, 673 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3895.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 725 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 635 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 2959.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24398occurred in iteration=5, InterpolantAutomatonStates: 554, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 11298.1ms AutomataMinimizationTime, 65 MinimizatonAttempts, 230378 StatesRemovedByMinimization, 61 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 18.6ms SsaConstructionTime, 78.2ms SatisfiabilityAnalysisTime, 1645.5ms InterpolantComputationTime, 1099 NumberOfCodeBlocks, 1099 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 1034 ConstructedInterpolants, 0 QuantifiedInterpolants, 3628 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 65 InterpolantComputations, 65 PerfectInterpolantSequences, 331/331 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 - StatisticsResult: Ultimate Automizer benchmark data with 5 thread instances CFG has 7 procedures, 52 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 615330.8ms, OverallIterations: 68, TraceHistogramMax: 1, EmptinessCheckTime: 411.9ms, AutomataDifference: 181316.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 58156.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6879 SDtfs, 10476 SDslu, 14909 SDs, 0 SdLazy, 13850 SolverSat, 626 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6502.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 649 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 568 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 3462.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=225406occurred in iteration=5, InterpolantAutomatonStates: 558, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 373129.0ms AutomataMinimizationTime, 68 MinimizatonAttempts, 5779406 StatesRemovedByMinimization, 66 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 15.9ms SsaConstructionTime, 102.2ms SatisfiabilityAnalysisTime, 2024.3ms InterpolantComputationTime, 1042 NumberOfCodeBlocks, 1042 NumberOfCodeBlocksAsserted, 68 NumberOfCheckSat, 974 ConstructedInterpolants, 0 QuantifiedInterpolants, 3208 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 68 InterpolantComputations, 68 PerfectInterpolantSequences, 457/457 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 3 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 15.8ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.3ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2ms SsaConstructionTime, 0.9ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 4 procedures, 28 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 22.2ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 0.5ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=211occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3ms SsaConstructionTime, 0.9ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 3 thread instances CFG has 5 procedures, 36 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 38.7ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 1.7ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 32.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1683occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1ms SsaConstructionTime, 0.4ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 4 thread instances CFG has 6 procedures, 44 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 688.4ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 18.5ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 666.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=13459occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1ms SsaConstructionTime, 0.3ms SatisfiabilityAnalysisTime, 0.0ms InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 5 thread instances CFG has 7 procedures, 52 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 1.1ms, OverallIterations: 0, TraceHistogramMax: 0, EmptinessCheckTime: 0.0ms, AutomataDifference: 0.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 0.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown